MACKENZIE PRESBYTERIAN UNIVERSITY ENGINEERING SCHOOL DIGITAL TV RESEARCH LABORATORY TEST REPORT ON LTE SIGNAL INTERFERENCE IN DIGITAL TV IN THE UHF BAND Requester: SET – Brazilian Society of TV Engineering NUMBER OF TEST REPORT DATE OF ISSUE NOVEMBER 4 2013 STANDARDS APPLICABLE IN ACCORDANCE WITH REVIEW DATE DETAILS 1.0 NOV 4 2013 VERSION 1 Note: This report contains 142 pages. This report presents the test results of the particular equipment or component presented for the evaluation and does not imply compliance of manufactured equipment.
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MACKENZIE PRESBYTERIAN UNIVERSITY
ENGINEERING SCHOOL
DIGITAL TV RESEARCH LABORATORY
TEST REPORT ON LTE SIGNAL
INTERFERENCE IN DIGITAL TV IN THE
UHF BAND
Requester: SET – Brazilian Society of TV Engineering
NUMBER OF TEST REPORT
DATE OF ISSUE NOVEMBER 4 2013
STANDARDS APPLICABLE
IN ACCORDANCE WITH
REVIEW DATE DETAILS
1.0 NOV 4 2013 VERSION 1
Note:
This report contains 142 pages. This report presents the test results of the particular equipment or
component presented for the evaluation and does not imply compliance of manufactured
equipment.
Master Agreement: NUCOI-LTVD-892/2013 Page: 2
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TEST REPORT FOR DETERMINATION OF THE PROTECTION RATIO
AND OVERLOAD THRESHOLD OF ISDB-TB DIGITAL TERRESTRIAL TV
RECEIVERS WITH THE INTRODUCTION OF THE MOBILE SERVICE IN
"Study on interference between ISDB-T and IMT in the 700 MHz band".
[7] ETSI TS 125,101 V11.4.0 (2013-02) – User Equipment (UE) radio transmission and
reception (FDD) (3GPP TS 25,101, version 11.4.0, update release 11).
[8] ETSI TS.125.104 V11.4.0 (2013-02) – Base Station (BS) radio transmission and reception
(FDD) (3GPP TS 25,104, version 11.4.0, update release 11).
[9] ETSI TS 136,101 V11.3.0 (2013-02) – Evolved Universal Terrestrial Radio Access (E-
UTRA) – User Equipment (UE) radio transmission and reception (3GPP TS 36,101,
version 11.3.0, release 11).
[10] ETSI TS.136.104 V11.3.1 (2013-02) – Evolved Universal Terrestrial Radio Access (E-
UTRA) – Base Station (BS) radio transmission and reception (3GPP TS 36,104, version
11.3.1, release 11).
[11] ERA Technology Report 2010 – 0026 (Issue 2) – LTE Interference into Domestic Digital
Television Systems.
[12] ECC REPORT 148 – Measurements on the Performance of DVB-T receivers in the
presence of interference from the mobile service (especially from LTE) – Marseille, June
2010.
[13] ABNT NBR 15604:2007Vc2008.
[14] ABNT NBR 15608 2D1:2008.
[15] ABNT NBR 15602-1:2007.
[16] ABNT NBR 15602-2:2007.
[17] ABNT NBR 15602-3:2007.
[18] ABNT NBR 15603 2D1:2009.
[19] ABNT NBR 15603 2D2:2009.
[20] ABNT NBR 15603 2D3:2009.
[21] ABNT NBR 15604:2007Vc2008.
[22] ABNT NBR 15608 2D1:2008.
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2.3 LTE Mobile System
2.3.1 Channel Plan – Current Situation
Anatel issued Public Consultation No. 12, "Proposal for the Regulatory Council on the Conditions
of Use of Radio frequencies, in the Range of 698 MHz to 806 MHz", on February 27, 2013. The
arrangement of frequencies2 for mobile systems to be implemented in this band of 700 MHz,
proposed by the Ministry of Communications and Anatel, is the one defined in options A5 and A6
of Table 3 of Recommendation ITU-R M 1036-4, according to Tables I and II of the Annex to the
Public Consultation, reproduced below.
ANNEX TO PUBLIC CONSULTATION No. 12
Table I: Radiofrequency Sub-Band Blocks.
Block No.
Transmission from the Mobile Station/Terminal (MHz)
Transmission from the Base/Nodal/Repeater Station
(MHz)
1 703 to 708 758 to 763
2 708 to 713 763 to 768
3 713 to 718 768 to 773
4 718 to 723 773 to 778
5 723 to 728 778 to 783
6 728 to 733 783 to 788
7 733 to 738 788 to 793
8 738 to 743 793 to 798
9 743 to 748 798 to 803
2 On November 11, 2013, Anatel published Resolution 625/2013 approving the "Assignment, Destination and Regulation on Conditions of Radiofrequencies Use in the Range of 698 MHz to 806 MHz". As this work began before the publication of Resolution 625/2013, in this section we report the content of public Consultation No. 12, on which we base all tests. However, the contents of the Public Consultation and Resolution 625/2013 are such that the entire work, as well as the results, is still valid. Differences of bandwidths of the LTE channel can be adapted to each specific condition of bandwidth, since the effect of interference is based on the spectral density of the signal interferer, allowing the correction of the results for different channel bandwidths and total power of the LTE interferer signal.
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Block No.
Transmission from the Mobile Station/Terminal (MHz)
Transmission from the Base/Nodal/Repeater Station
(MHz)
Table II: Blocks of the Sub-Bands that can be Operated in Different Conditions
Block No. Channelization (MHz)
10 698 to 703
11 748 to 758
12 803 to 806
Figure 11 and Figure 12 provide an overview of the proposed situation in the frequency
range 698 to 806 MHz.
Figure 11: LTE FDD channel arrangement
Figure 12: LTE TDD channel arrangement
Considering the channel proposal of Public Consultation and Recommendation ITU-R M
1036-4, in blocks 10, 11, and 12 only Time Division Duplex (TDD) systems can be operated; there
is no definition of paired blocks for operating Frequency Division Duplex (FDD) systems.
On the other hand, Table 5.5-1 “E-UTRA Operating Bands” of Standard ETSI TS 136 101
V11.3.0 (2013-02) [7] states that the bands 28 (FDD) and 44 (TDD), which correspond to the
frequency bands chosen by Brazil, should operate from 703 to 803 MHz. The same table is
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presented in the Standard ETSI TS 136 104 V11.3.1 (2013-02) [8]. This means that there will be
no radio base station or user equipment available to operate on blocks 10 and 12.
2.3.1.1 Conditions of Use of the Range Proposed in Public Consultation No. 12
a) The frequency blocks contained in Table I of the Public Consultation No. 12 may be used
in aggregate form.
b) The same supplier or its controlled or controlling affiliated company in the same area of
service provision will be allowed to operate in the frequency sub-bands of the Annex of
the Public Consultation No. 12 up to a total maximum of 20 MHz in each direction of
transmission. The quantity of blocks of 5 MHz to be granted per carrier will be defined in
the bidding to be performed.
c) The output power of one transmitter in the station should be the minimum required to
achieve the service with good quality and adequate reliability, and it should be less than:
i. 46 dBm, measured at the output of the transmitter, and 60 dBm of e.r.p. power for
base, nodal, or repeater stations; and
ii. 40 dBm, measured at the output of the transmitter, and 45 dBm of e.r.p. power for
mobile stations, vehicles, and terminals.
d) In accordance with the blocks determined in Table I of Annex A, undesirable emissions for
systems employing digital modulation should be attenuated by at least 25 dB in relation to
the level of the block’s average power, decreasing linearly until:
i. 40 dB is reached at 250 kHz of the block’s ends; and
ii. 60 dB is reached at 3 MHz of the block’s ends.
iii. Any other frequency emissions must be attenuated by at least 60 dB.
iv. The maximum spurious emission level in the bands 54–118 and 174–230 MHz and
v. 470–698 MHz should be, at most, –47 dBm, measured at a resolution of 100 kHz.
vi. The spurious signals emissions outside the transmission range, when the
transmitter is idle, must be less than –47 dBm at any frequency within the limits of
100 kHz and 12.75 GHz, measured with a resolution of 100 kHz.
Considering the channel arrangement of the Public Consultation No. 12 of February 27,
2013, dividing the band of 703 to 803 MHz into several blocks of 5 MHz, and considering that the
details of the blocks submitted to auction will be determined in the Tender Document, that one
service provider should be granted no more than 20 MHz of bandwidth, that the service providers
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should transmit LTE signals with at least 5 MHz of bandwidth, and that one possible configuration
would be three providers sharing the entire range of 45 MHz × 2, each with a bandwidth of 15 MHz
× 2, it was decided that the LTE interfering signals used in tests with the DTV receivers shall
consider only FDD system signals, due to the uncertainty of the use of TDD systems by means of
Public Consultation No. 12.
2.4 Set of Tests
These tests should be conducted under controlled laboratory conditions and within a Faraday cage
so as to avoid interference from other sources besides the planned sources.
The objective of this test is to evaluate the performance of the receiver when subjected to
LTE interference signals in the input of the receiving antenna. The detail of such tests is presented
in section 2.4.7.
2.4.1 List of Equipment to be Used in Testing
There is a variety of equipment available for the tests, which will be adopted provided that it meets
the parameters and the accuracy required. The list of major equipment is shown below:
i. Video source: Tektronix digital video source MTX 100;
ii. Vector signal generator: Rohde & Schwarz SMU200A;
iii. Modulator: Eiden OFDM modulator 3501C;
iv. Step attenuator: Rohde & Schwarz RSP 831.3515.02 ;
v. Filter: Microwave Filter Co., Inc. full band pass filter;
vi. Amplifier: Itelco RF amplifier;
vii. Combiner: Mini-Circuits power splitter ZSC enable-2-4+;
viii. Divisor: Mini-Circuits power splitter ZSC enable-2-4+;
ix. Analyzer: Rohde & Schwarz FSV7.
Note: For additional information concerning the combiner, splitter, impedance matching
adapter, amplifier, and filter, see Annex 1 and Annex 2
2.4.2 ISDB-TB Receiver
The ISDB-TB TV receivers will be tested in all channels of UHF between channels 14 and 51.
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2.4.3 Parameters to Be Used in the Tests
It is established that:
Desired signal: Signal from DTV standards
Interference signal: Signal from mobile LTE system
2.4.3.1 Parameters of the Desired Signal
The default setting used in tests has the following parameters:
Mode: 3 (8K);
Layer: 1 × Layer, 13 segments;
Modulation: 64 QAM;
Convolutional encoder rate (FEC): CR = 3/4;
Guard interval: GI = 1/8;
Time interleaving: TI = 200 ms.
The PR and the Oth are obtained by means of C(I) curves. For this purpose, the level of
the desired signal will be varied from a level close to the threshold of reception of the TV receivers
up to higher levels of reception. The levels established shall be –77, –70, –60, –50, –40, –30, and
–20 dBm.
2.4.3.2 Parameters of the Interferer Signal
Only FDD systems signals will be considered.
The interference signal follows one of the settings below for the downlink or uplink:
I) Downlink
Three adjacent channels of 15 MHz, in carrier aggregation, occupying the frequency
range of 758 to 803 MHz, with all the Resource Blocks (RBs) occupied by users.
The parameters of the configured signals are presented in Figure 13 and Figure 14:
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All RBs scheduled simultaneously with PN9, with 64 QAM modulation, as shown in Figure
13 and Figure 17.
Figure 13: Downlink frame configuration
Allocation map of RBs, according to Figure 14: the horizontal axis represents the time in
milliseconds, while the vertical axis represents the RBs.
Figure 14: OFDMA temporal plane
Envelope of the signal in time (period of 10 ms), as seen in Figure 15.
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Figure 15: Downlink signal waveform
Complementary Cumulative Distribution Function (CCDF): Function of distribution of the
amplitude of the envelope of the modulated signal, observed in Figure 16.
Figure 16: Downlink CCDF
OFDM signal spectrum: LTE downlink, illustrated in Figure 17.
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Figure 17: Downlink signal spectrum
II) Uplink
A 15 MHz channel, occupying the frequency range of 703 to 718 MHz, in pulsed mode,
with Physical Uplink Shared Channel (PUSCH) signal occupying all RBs of the first sub-frame of 1
ms duration and no signal in the subsequent 9 ms, completing a 10 ms frame.
The parameters of the configured signals are presented in Figure 18 to Figure 25.
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Configuration of the signal: only PUSCH, with 75 RBs activated during the first sub-frame,
and nine subsequent sub-frames without active signal, modulated in 16 QAM, in
agreement with Figure 18.
Figure 18: Uplink frame setting
Allocation map of RBs: the horizontal axis represents time in milliseconds, while the
vertical axis represents the RBs in accordance with Figure 19.
Figure 19: SC-FDMA temporal plane
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Envelope of the signal in time: period of 0 to 10 ms, 1 full frame (1 ms active and 9 ms
inactive), shown in Figure 20; with a period of 0 to 100 ms, 10 frames, shown in Figure 21.
Figure 20: Uplink signal waveform: 1 complete frame
Figure 21: Uplink signal waveform: 10 complete frames
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CCDF: cumulative distribution function of amplitude of the envelope of the modulated
signal, with an active period of 1 ms (only the first sub-frame) shown in Figure 22 and a
period of one frame of 10 ms (10 sub-frames of 1 ms) shown in Figure 23. Note the
difference of 10 dB in the maximum values of peak power/average power between the
situations.
Figure 22: Uplink CCDF: 1 ms
Figure 23: Uplink CCDF: 10 ms
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Single Carrier Frequency Division Multiple Access (SC-FDMA) signal spectrum: LTE
uplink. Figure 24 shows the spectrum of the signal in the period from the beginning of one
sub-frame until the end of the sub-frame, and Figure 25 shows the spectrum of the signal
from the beginning of the frame up to 10 ms (a complete frame). Note the difference of 10
dB in average power between the situations.
Figure 24: Uplink signal spectrum
Figure 25: Uplink signal spectrum
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2.4.4 Measurements in the Presence of Time-Variant Interfering Signal
In tests of interference carried out in Europe between DVB-T/T2 and LTE, it was found that rapid
variations of the level of the interferer signal cause degradations in the PR and Oth performance of
DTV receivers due to the dynamic operation of the Automatic Gain Control (AGC) circuit and the
algorithms for the estimation of the channel.
Some DTV receivers may present "unstable" behavior in the presence of this type
of LTE signal, as reported from abroad and observed during the tests performed in the
Mackenzie University Laboratory.
The uplink mobile system signal may vary considerably in both the time domain and the
frequency domain, depending on the traffic load. In the frequency domain, the number of RBs
allocated to each SC-FDMA symbol can vary quickly. In the time domain, there may be long
periods in which the UE does not transmit any signal, generating an irregular profile of pulsed
power. The ITU-R BT.2215 -2 Report recommends that measurements should be performed with
uplink signals at various rates of transmission. For these reasons, the adoption of pulsed signals
was decided, as defined in section 2.4.3.1 – (II) “Uplink”.
The ITU-R BT.2215 -2 Report recommends in section 5.8, “Interferer Reference Power
Level", that the the average power of the signal in its active period should be considered in the
measurements of pulsed signals. From the diagrams shown in section 2.4.3.1 – (II), “Uplink”, one
can clearly verify that the average power of the uplink signal in its active period is 10 dB higher
than the average power of the complete frame period. Thus in analyses and calculations of
interference involving parameters of C/I and C/N, one must consider the average power of the
signal in one complete frame.
2.4.5 Reference Power Level of LTE Interferer Signal
Variations of the interference signal level can be obtained by direct action on the signal level as
well as on the occupation rate. To view the degradation caused by a time-variant interfering signal,
it is necessary to keep the Root Mean Square (RMS) power or the power spectral density of active
portions of the time-variant interfering signal constant in relation to the RMS power or in relation to
the power spectral density of the interferer with 100% loading (condition of power fixed in time).
This situation corresponds to the observation of the spectrum on the spectrum analyzer, so that
the power spectral density displayed onscreen, with the same parameters as those set on the
measuring equipment, has the same amplitude for the signals loaded at 100% and at 0%.
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2.4.6 Methods of Evaluating the Point of Failure
The ITU-R Recommendation BT.1368 proposes the use of the Subjective Failure Point (SFP)
method in a unified manner in relation to protection ratio measurements. The relationship of RF
protection for a desired signal of DTV is the value of the ratio between the powers of the desired
signal and the unwanted signal (interferer) in the input of the receiver, determined by the SFP
method, and rounding the result upward to the nearest integer value.
The SFP method corresponds to the quality of image where no more than one error is
visible on the screen for an average time of observation of 60 seconds. The adjustments of the
levels of desired and unwanted signals should be made in small steps, typically of 0.1 dB.
2.4.7 Conditions of Test Environment
The tests should be conducted under conditions of normal operation at ambient temperature in the
range of 15 to 45°C and humidity of 45 to 90% without the impediment of natural ventilation and
with power voltage of 0.9 to 1.1 times the nominal one, according to the ABNT NBR 15604
Standard [8].
Note: The tests should be carried out with all the equipment, including the receiver, in a
Faraday cage, in order to eliminate any interference from external signals.
2.5 Test Procedure of Adjacent Channel Leakage Ratio (ACLR)
2.5.1 Importance of Measuring
The Adjacent Channel Leakage Ratio (ACLR) is an important parameter that indicates the quality
of the signal generated by a signal generator or a transmitter in terms of its emissions outside the
designated occupied bandwidth. Numerically, the ACLR represents the ratio, in decibels, of the
average power of the generated signal integrated inside the designated channel bandwidth to the
average power of out-of-band emissions integrated in the upper or lower adjacent channel band.
The natural tendency is that the values of ACLR are smaller for adjacent channels immediately
neighboring the assigned range, and progressively increase with the distance from the assigned
frequency band, because this is the natural behavior of emissions outside the band. The concept
of ACLR applies, in general, to signal generators or transmitters for various types of services, with
different settings and different central frequencies and bandwidths of both main and adjacent
signals, and including the involvement of different services, as is the case of this work.
Figure 26 illustrates the definition of the LTE signal ACLR measured on TV channel 51.
The importance of having a high value of ACLR and of measuring it is evident from the figure,
because when the DTV receiver is tuned to channel 51, the interfering power P51 goes directly
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into the demodulator in addition to the DTV signal, and thus the greater the ACLR, the smaller the
interfering power P51 will be.
Figure 26: ACLR measurement
The emissions outside the range, and therefore the values of ACLR, depend on several
factors such as type of modulation, parameters of modulation, frequency of operation,
characteristics of power amplifiers employed and its back-off in relation to its saturation level,
employment of linearizers, filtering of the transmitted signal, and so on. In addition to taking the
average power of the signal into account, we should also consider the peak-to-average ratio of the
signal in order to maintain the levels of the signal peaks in accordance with the linear operating
range of the signal generator or amplifier employed.
Signal generators for laboratory use often provide high quality with low out-of-band
emission levels, that is, with high values of ACLR, typically above 60 dB, for adjacent channels
immediately neighboring the main signal and increasing rapidly for adjacent channels further away.
Their power levels are relatively modest, in the range from 10 to 20 dBm.
Commercial transmitters, on the other hand, provide signals with higher powers, but with
higher levels of spurious, that is, with smaller values of ACLR. As in all transmission systems,
emissions outside the band of the radio BS of LTE systems shall comply with the operational
requirements defined by Anatel, and admit a certain degree of improvement, through adjustment of
operation back-off and filtering of the output signal of the transmitter. The operational requirements
of emissions outside the band of UE, which shall also comply with the limits established by Anatel,
are less demanding than those of the BS, in order to avoiding making it excessively expensive.
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As the ACLR interfering signal depends on the levels of the signal set up in the signal
generator and in the amplifiers employed in the measurement setup, it is important to establish
these levels with a lot of care at the beginning of the tests and to keep these levels fixed
throughout the measurements, performing variations of levels effectively applied in measurements
only by means of external attenuators. For the same reason, the ACLR measurements must be
carried out in a measurement setup configuration and with the levels of signal employed in the
actual measurements of LTE × DTV interference.
The interference tests of LTE on the DTV were carried out by Mackenzie in a setup with
LTE signal generators with a more spectrally clean signal, that is, with better ACLR (larger) than
the transmitters actually in operation. The measured ACLR values (and this is another reason for
ACLR measurement importance) are used together with the results of the measurements to make
more realistic estimates of the interference of the LTEs in DTV, applying conversions to the PR
measurements (see section 1.5.2 of [2]), taking into account the out-of-band emission
characteristics of actual LTE downlink (BS) and uplink (UE) transmitters. Such a conversion has
been applied in the ITU-R for sharing studies between services.
2.5.2 ACLR Measurements
I) Requirements
The ACLR measurements require care, due to the wide dynamic range involved, in order to ensure
that distortions by non-linearities in the measuring instrument do not occur. The test setup is
presented in Figure 27, which must be a subset of the setup shown in Error! Reference source
not found..
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II) Test Setup
Figure 27: ACLR.mesasurement test setup
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III) Test Procedure
The measurements are performed with the setup shown in Figure 27Error! Reference source not
found. in "Channel Power" mode, by measuring the signal strengths of the LTE and DTV over
each effective channel center frequency and bandwidth. Two conditions must be ensured for the
measurements of downlink and uplink ACLR:
Condition 1 (C1): At no time during the measurements can the LTE signal level be above
the maximum allowed level of any of the measuring equipment, including when the RF
attenuator is set at 0 dB attenuation.
Condition 2 (C2): There can be no distortion inside the spectrum analyzer of the LTE
signal applied, because the value of ACLR measured would be affected. The condition of
linearity of measurement must be conferred by reducing the signal level LTE at 5 dB
through the internal attenuator of the spectrum analyzer and observing the effect on the
measured result. The linearity of the measurement is acceptable if the reduction of the
level does not affect the LTE signal spectrum in its designated frequency band and
outside it.
a) Connect the equipment as shown in item (II);
b) Configure the vector signal generator to generate the LTE signal with the transmission
parameters, center frequency, and output level exactly as defined and used in
measurements described in section 2.6.1 for the downlink and uplink;
c) With the RF attenuator at 0 dB, adjust the internal attenuator of the spectrum analyzer to
the smallest value that meets the condition C2;
d) Measure the signal LTE strength (PLTE) in decibel-milliwatts with the spectrum analyzer
in "channel power" mode, with 43.515 MHz bandwidth centered at 780.5 MHz for the
measurement of downlink and with 13.5 MHz bandwidth centered at 710.5 MHz for the
measurement of uplink;
e) Measure the LTE out-of-band signal power on channel 51 (P51) in decibel-milliwatts with
the spectrum analyzer in "channel power" mode and 5.57 MHz of bandwidth centered on
695.1429 MHz (including the positive shift of 1/7 MHz for DTV signal);
f) Calculate the LTE downlink or uplink ACLR:
ACLR51DL/UL = PLTE – P51
g) Note the result in Table 13;
h) Repeat the procedures of items (e) and (f) for the other TV channels desired for both LTE
downlink and uplink LTE signals.
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i) If necessary, spectrum analyzer features such as preamplifier activation and "noise
correction", which reduce the noise level baseline, may be employed in measuring ACLR.
Care should be taken with regard to condition C2.
Table 13: ACLR
DTV Channels (dB) DL ACLR (dB) UL ACLR (dB)
51
50
49
...
Figure 28 shows an example of LTE uplink ACLR measurement for the DTV channel 51,
where the measuring equipment screenshot shows the specific parameters used in the
configuration of the test equipment, which contains a specific application software for ACLR
measurement. The application software presents the value of P51 – PLTE, and therefore the
measured value in this example is ACLR51UL = 97.46 dB.
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Figure 28: Example of ACLR measurement of LTE UL on the DTV channel 51.
2.6 Interference Tests of LTE signal in Digital Television
The main objective of these tests is the determination of curves that characterize the effects of LTE
signal interferences on DTV receivers. Two distinct configurations of LTE signals are used: uplink
and downlink signals as described in section2.4.3.1.
2.6.1 Measurements of Interference of LTE in Digital Television
I) Requirement
The test is intended to measure the points of TOV (see section1.4.2) for various power levels of
DTV n (C) as a function of LTE interference signal strength (I). The results are recorded in tables
and graphs called relations C(I), which are subsequently analyzed in order to extract the PR and
Oth parameters of each DTV receiver.
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II) Test Setup
Figure 29: Test setup for LTE interference on DTV
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III) Test Procedure
a) Connect the measuring equipment as shown in item (II);
b) The DTV signal, the desired signal, must be the dynamic “zone plate”, with the following
standard modulation configuration: mode 3, 64 QAM, CR = 3/4, ∆/TU = 1/8 and TI = 200
ms;
c) The DTV signals utilized in the tests must have a positive central frequency shift of 1/7
MHz;
d) Set the LTE signal generator with the desired configuration, downlink or uplink, in
accordance with Section2.4.3.1;
e) Set the DTV modulator to channel 14 (473,143 MHz);
f) Adjust the attenuator connected to the LTE signal generator side for maximum
attenuation;
g) Adjust the attenuator connected to the DTV signal side in order to obtain a level of –77
dBm in the input of the DTV receiver, or STB, in the test;
h) Acting on the attenuator connected to the LTE signal generator side, lower the attenuation
of the LTE signal, observing the zone plate image on the receiver screen, up to the point
of QEF. We call this the receiver reaching its TOV point;
i) Put the attenuator of the DTV signal to its maximum and read out the level of the
interfering LTE signal level, I (dBm), on the signal analyzer;
j) Register the I level in Error! Reference source not found.;
k) Repeat the procedure from item (f) to (k) according to the established DTV signal power
level;
l) Repeat the procedure from item (e) for the other UHF TV channels 15 to 51.
Table 14: TOV for Downlink/Uplink LTE Interference
DTV Level (dBm) LTE Downlink/Uplink (dBm)
N-Channel Receiver TOV
-20
-30
-40
-50
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DTV Level (dBm) LTE Downlink/Uplink (dBm)
N-Channel Receiver TOV
-60
-70
2.7 LTE Interference Tests Results
2.7.1 ACLR
The results of ACLR of LTE downlink and uplink signals generated by the LTE interference test
setup are shown in the Table 15 Error! Reference source not found.and the corresponding
spectrum analyzer screenshot in Figure 30 to Figure 35. For TV channels below CH 49, please
consider the ACLR value for CH 49.
Table 15: ACLR of LTE Interference Signal over Digital TV Channel
TV Channel DL ACLR (dB) UL ACLR (dB)
51 100.08 97.46
50 100.74 102.64
49 100.73 103.04
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Figure 30: LTE downlink ACLR over TV channel 49
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Figure 31: LTE downlink ACLR over TV channel 50
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Figure 32: LTE downlink ACLR over TV channel 51
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Figure 33: LTE uplink ACLR over TV channel 49
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Figure 34: LTE uplink ACLR over TV channel 50
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Figure 35: LTE uplink ACLR over TV channel 51
2.7.2 Downlink TOV Measurement Results
The measurement results of TOV for the receivers A to F are shown in Table 16 and plotted in
Figure 36 to Figure 47. The PR and Oth values are obtained from Table 16.
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I) Table of Results
Table 16: LTE – downlink interference TOV
DTV (dBm) LTE Downlink TOV (dBm)3
Channel 14 A B C D E F
-20 1.3 >9.0 >9.0 >9.0 >9.0 >9.0
-30 1.1 >9.0 >9.0 >9.0 6.4 >9.0
-40 0.3 >9.0 >9.0 >9.0 2.2 >9.0
-50 -0.7 7.6 >9.0 3.6 -1.6 >9.0
-60 -2.8 5.8 >9.0 3.1 -4.4 >9.0
-70 -3.7 -9.9 >9.0 1.5 -7.4 -0.7
-77 -5,7 -21.5 8.4 -0.3 -13.8 -7.2
DTV (dBm) LTE Downlink TOV (dBm)
Channel 15 A B C D E F
-20 1.3 >9.0 >9.0 >9.0 >9.0 >9.0
-30 1.1 >9.0 >9.0 >9.0 >9.0 >9.0
-40 0.3 >9.0 >9.0 >9.0 7.1 >9.0
-50 -1.0 7.4 >9.0 3.5 3.9 >9.0
-60 -3.2 5.7 >9.0 2.9 0.1 >9.0
-70 -4.3 -10.0 >9.0 1.5 -6.6 1.5
-77 -7.1 -21.5 >9.0 -0.2 -15.3 -7.6
DTV (dBm) LTE Downlink TOV (dBm)
Channel 16 A B C D E F
-20 2.5 >9.0 >9.0 >9.0 >9.0 >9.0
-30 2.3 >9.0 >9.0 >9.0 >9.0 >9.0
-40 1.3 >9.0 >9.0 >9.0 7.7 >9.0
-50 -0.2 7.3 >9.0 3.6 5.7 >9.0
-60 -2.7 5.5 >9.0 2.6 0.7 >9.0
-70 -5.2 -10.0 >9.0 1.1 -6.6 1.7
-77 -9.2 -20.9 >9.0 -1.4 -15.1 -7.2
3 Note: The cells with values >9.0 in Table Error! Reference source not found. that the receiver
did not reach the condition of TOV, even when the maximum level of output permitted by the test
setup was reached. For the downlink signal the maximum power was 9.0 dBm.
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DTV (dBm) LTE Downlink TOV (dBm)
Channel 17 A B C D E F
-20 4.8 >9.0 >9.0 >9.0 >9.0 >9.0
-30 4.8 >9.0 >9.0 >9.0 >9.0 >9.0
-40 3.8 >9.0 >9.0 >9.0 7.7 >9.0
-50 1.8 7.2 >9.0 3.8 4.8 >9.0
-60 -2.1 5.3 >9.0 2.1 -0.1 >9.0
-70 -5,7 -10.1 >9.0 0.6 -6.7 1.2
-77 -9.7 -21.0 6.6 -1.4 -15.1 -8.0
DTV (dBm) LTE Downlink TOV (dBm) Channel
018 A B C D E F
-20 5.8 >9.0 >9.0 >9.0 >9.0 >9.0
-30 6.3 >9.0 >9.0 >9.0 >9.0 >9.0
-40 4.9 >9.0 >9.0 >9.0 6.6 >9.0
-50 2.4 7.1 >9.0 3.7 3.2 >9.0
-60 -1.1 5.3 >9.0 2.3 -1.3 >9.0
-70 -4.7 -9.9 8.4 0.8 -6.6 1.5
-77 -8.4 -20.9 6.4 -0.8 -15.3 -7.8
DTV (dBm) LTE Downlink TOV (dBm)
Channel 19 A B C D E F
-20 5.9 >9.0 >9.0 >9.0 >9.0 >9.0
-30 7.0 >9.0 >9.0 >9.0 7.7 >9.0
-40 5.5 >9.0 >9.0 >9.0 4.0 >9.0
-50 2.7 7.1 >9.0 3.7 -0.3 >9.0
-60 0.0 5.3 >9.0 2.2 -3.6 >9.0
-70 -3.0 -10.0 >9.0 0.8 -7.6 1.9
-77 -6,0 -20.9 >9.0 -0.7 -15.2 -6.7
DTV (dBm) LTE Downlink TOV (dBm)
Channel 20 A B C D E F
-20 7.8 >9.0 >9.0 >9.0 >9.0 >9.0
-30 9.0 >9.0 >9.0 >9.0 5.6 >9.0
-40 7.6 >9.0 >9.0 >9.0 1.0 >9.0
-50 4.6 7.1 >9.0 3.6 -2.1 >9.0
-60 2.9 5.2 >9.0 1.9 -4.7 >9.0
-70 1.9 -9.8 >9.0 0.6 -9.8 1.4
-77 0.5 -20.8 >9.0 -0.7 -17.9 -7.6
DTV (dBm) LTE Downlink TOV (dBm)
Channel 21 A B C D E F
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-20 7.8 >9.0 >9.0 >9.0 >9.0 >9.0
-30 9.0 >9.0 >9.0 >9.0 4.6 >9.0
-40 7.5 >9.0 >9.0 >9.0 0.2 >9.0
-50 4.7 6.9 >9.0 3.8 -2.7 >9.0
-60 2.8 4.9 >9.0 1.7 -5.3 >9.0
-70 2.0 -10.1 >9.0 0.6 -11.2 1.5
-77 0.7 -21.2 >9.0 -0.8 -18.9 -7.2
DTV (dBm) LTE Downlink TOV (dBm)
Channel 22 A B C D E F
-20 7.8 >9.0 >9.0 >9.0 >9.0 >9.0
-30 9.0 >9.0 >9.0 >9.0 4.7 >9.0
-40 7.4 >9.0 >9.0 >9.0 0.5 >9.0
-50 4.7 6.8 >9.0 3.8 -2.7 >9.0
-60 2.7 5.0 >9.0 1.5 -5.4 >9.0
-70 1.7 -9.9 >9.0 0.4 -10.4 1.7
-77 0.6 -21.4 >9.0 -1.0 -18,2 -6.8
DTV (dBm) LTE Downlink TOV (dBm)
Channel 23 A B C D E F
-20 7.7 >9.0 >9.0 >9.0 >9.0 >9.0
-30 9.0 >9.0 >9.0 >9.0 6.5 >9.0
-40 7.2 >9.0 >9.0 >9.0 2.2 >9.0
-50 4.4 6.3 >9.0 3.7 -1.4 >9.0
-60 2.7 4.4 >9.0 1.4 -4.3 >9.0
-70 1.7 -10.5 >9.0 0.2 -8.6 1.3
-77 0.6 -16.1 >9.0 -1.2 -16.4 -7.2
DTV (dBm) LTE Downlink TOV (dBm)
Channel 24 A B C D E F
-20 6.3 >9.0 >9.0 >9.0 >9.0 >9.0
-30 8.1 >9.0 >9.0 >9.0 >9.0 >9.0
-40 6.3 >9.0 >9.0 >9.0 6.8 >9.0
-50 3.8 6.3 >9.0 4.6 3.0 >9.0
-60 2.0 4.5 >9.0 1.0 -2.0 >9.0
-70 1.2 -10.4 >9.0 0.0 -6,5 1.5
-77 -0.3 -16.1 >9.0 -1.6 -15.3 -7.1
DTV (dBm) LTE Downlink TOV (dBm)
Channel 25 A B C D E F
-20 7.8 >9.0 >9.0 >9.0 >9.0 >9.0
-30 9.0 >9.0 >9.0 >9.0 >9.0 >9.0
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-40 7.0 7.4 >9.0 >9.0 7.7 >9.0
-50 4.3 6.4 >9.0 3.6 4.1 >9.0
-60 2.6 4.7 >9.0 1.0 -0.6 >9.0
-70 1.7 -10.2 >9.0 -0.2 -6.6 1.6
-77 0.5 -15.8 >9.0 -1.7 -15.0 -7.1
DTV (dBm) LTE Downlink TOV (dBm)
Channel 26 A B C D E F
-20 6.3 >9.0 >9.0 >9.0 >9.0 >9.0
-30 8.0 >9.0 >9.0 >9.0 >9.0 >9.0
-40 5.9 7.5 >9.0 >9.0 >9.0 >9.0
-50 3.3 5.8 >9.0 3.4 5.5 >9.0
-60 1.6 4.0 >9.0 0.7 0.4 >9.0
-70 0.7 -10.7 >9.0 -0.5 -6,5 0.3
-77 -0.5 -16.2 >9.0 -1.7 -15.1 -8.1
DTV (dBm) LTE Downlink TOV (dBm)
Channel 27 A B C D E F
-20 6.8 >9.0 >9.0 >9.0 >9.0 >9.0
-30 8.2 >9.0 >9.0 >9.0 >9.0 >9.0
-40 6.3 7.5 >9.0 >9.0 >9.0 >9.0
-50 3.7 6.0 >9.0 3.5 6.0 >9.0
-60 1.6 4.2 >9.0 0.4 1.0 8.4
-70 0.7 -10.7 >9.0 -0.8 -6,5 -1.5
-77 -0.4 -16.2 >9.0 -2.2 -15.3 - 8.2
DTV (dBm) LTE Downlink TOV (dBm)
Channel 28 A B C D E F
-20 7.0 >9.0 >9.0 >9.0 >9.0 >9.0
-30 8.4 >9.0 >9.0 >9.0 >9.0 >9.0
-40 6.2 7.5 >9.0 >9.0 >9.0 >9.0
-50 3.9 5.9 >9.0 4.7 5.9 >9.0
-60 2.0 4.1 >9.0 1.8 1.1 8.2
-70 1.1 -10.9 >9.0 -0.1 -6.6 -2.5
-77 -0.1 -16.2 >9.0 -1.6 -15.1 8.8
DTV (dBm) LTE Downlink TOV (dBm)
Channel 29 A B C D E F
-20 6.9 >9.0 >9.0 >9.0 >9.0 >9.0
-30 8.4 >9.0 >9.0 >9.0 >9.0 >9.0
-40 6.3 7.4 >9.0 >9.0 >9.0 >9.0
-50 4.2 5.7 >9.0 4.7 5.8 >9.0
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-60 2.1 3.9 >9.0 1.8 1.0 8.4
-70 1.0 -10.7 >9.0 -0.1 -6.6 -1.9
-77 -0.2 -16.1 >9.0 -1.7 -15.3 -8.7
DTV (dBm) LTE Downlink TOV (dBm)
Channel 30 A B C D E F
-20 5.8 >9.0 >9.0 >9.0 >9.0 >9.0
-30 8.4 >9.0 >9.0 >9.0 >9.0 >9.0
-40 6.1 7.4 >9.0 >9.0 >9.0 >9.0
-50 3.9 5.6 >9.0 4.1 5.4 >9.0
-60 1.7 3.9 >9.0 1.3 0.9 >9.0
-70 1.0 -10.7 >9.0 -0.6 -6.6 -0.2
-77 -0.4 -16.2 >9.0 -2.1 -15.3 -6.5
DTV (dBm) LTE Downlink TOV (dBm)
Channel 31 A B C D E F
-20 5.9 >9.0 >9.0 >9.0 >9.0 >9.0
-30 8.0 >9.0 >9.0 >9.0 >9.0 >9.0
-40 5.7 7.3 >9.0 >9.0 7.7 >9.0
-50 3.6 5.5 >9.0 4.7 5.0 >9.0
-60 1.8 3.8 >9.0 1.4 0.4 >9.0
-70 0.7 -10.7 >9.0 -0.5 -6.8 -1.2
-77 -1.0 -16.2 >9.0 -2.1 -15.2 -10.7
DTV (dBm) LTE Downlink TOV (dBm)
Channel 32 A B C D E F
-20 7.0 >9.0 >9.0 >9.0 >9.0 >9.0
-30 8.3 >9.0 >9.0 >9.0 >9.0 >9.0
-40 6.0 7.2 >9.0 >9.0 7.7 >9.0
-50 3.8 5.6 >9.0 4.6 4.4 >9.0
-60 2.1 3.8 >9.0 1.3 0.0 >9.0
-70 0.9 -10.7 >9.0 -0.5 -6.6 1.9
-77 -0.2 -21.7 >9.0 -2.1 -15.2 -6.1
DTV (dBm) LTE Downlink TOV (dBm)
Channel 33 A B C D E F
-20 5.7 >9.0 >9.0 >9.0 >9.0 >9.0
-30 8.2 >9.0 >9.0 >9.0 >9.0 >9.0
-40 5.9 7.0 >9.0 >9.0 7.9 >9.0
-50 4.1 5.3 >9.0 4.5 4.4 >9.0
-60 2.1 3.5 >9.0 1.1 0.1 >9.0
-70 0.9 -12.0 >9.0 -0.9 -6.6 1.5
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-77 -0.4 -21.8 >9.0 -2.5 -15.1 -6.7
DTV (dBm) LTE Downlink TOV (dBm)
Channel 34 A B C D E F
-20 6.3 >9.0 >9.0 >9.0 >9.0 >9.0
-30 7.3 >9.0 >9.0 >9.0 >9.0 >9.0
-40 5.2 7.0 >9.0 >9.0 7.9 >9.0
-50 3.1 5.4 >9.0 4.3 4.2 >9.0
-60 1.8 3.2 >9.0 0.6 0.0 >9.0
-70 0.6 -10.7 >9.0 -1.3 -6.6 0.8
-77 -0.8 -21.7 >9.0 -2.9 -15.2 -7.2
DTV (dBm) LTE Downlink TOV (dBm)
Channel 35 A B C D E F
-20 6.9 >9.0 >9.0 >9.0 >9.0 >9.0
-30 7.4 7.7 >9.0 >9.0 >9.0 >9.0
-40 5.4 7.0 >9.0 >9.0 7.9 >9.0
-50 3.2 5.3 >9.0 4.1 4.0 >9.0
-60 1.8 3.3 >9.0 0.8 -0.1 >9.0
-70 0.6 -10.7 >9.0 -1.4 -6.6 0.7
-77 -0.7 -21.7 >9.0 -3.1 -15.1 -7.6
DTV (dBm) LTE Downlink TOV (dBm)
Channel 36 A B C D E F
-20 7.0 >9.0 >9.0 >9.0 >9.0 >9.0
-30 7.2 7.6 >9.0 >9.0 >9.0 >9.0
-40 5.2 6.8 >9.0 >9.0 7.5 >9.0
-50 3.1 6.0 >9.0 4.2 3.5 >9.0
-60 1.6 3.2 >9.0 0.0 -0.5 >9.0
-70 0.5 -10.5 >9.0 -2.0 -6,5 -0.6
-77 -0.7 -21.6 8.3 -3.6 -15.0 -10.2
DTV (dBm) LTE Downlink TOV (dBm)
Channel 38 A B C D E F
-20 6.8 >9.0 >9.0 >9.0 >9.0 >9.0
-30 6.8 7.4 >9.0 >9.0 >9.0 >9.0
-40 4.6 6.2 >9.0 >9.0 6.5 >9.0
-50 3.0 4.9 >9.0 4.1 2.5 >9.0
-60 1.5 2.9 >9.0 0.0 -1.8 >9.0
-70 0.2 -10.7 >9.0 -1.5 -7.9 -0.5
-77 -0.8 -21.7 8.5 -3.6 -15.6 -7.0
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DTV (dBm) LTE Downlink TOV (dBm)
Channel 39 A B C D E F
-20 6.9 >9.0 >9.0 >9.0 >9.0 >9.0
-30 6.8 7.6 >9.0 >9.0 >9.0 >9.0
-40 4.6 6.3 >9.0 >9.0 6.1 >9.0
-50 3.0 4.7 >9.0 4.0 2.1 >9.0
-60 1.5 2.9 >9.0 -0.2 -2,3 >9.0
-70 0.2 -10.6 >9.0 -2,3 -8.7 -0.5
-77 -0.8 -21.7 >9.0 -3.7 -17.5 -7.2
DTV (dBm) LTE Downlink TOV (dBm)
Channel 40 A B C D E F
-20 6.6 >9.0 >9.0 >9.0 >9.0 >9.0
-30 6.4 7.6 >9.0 >9.0 >9.0 >9.0
-40 4.3 6.2 >9.0 7.8 5.6 >9.0
-50 2.9 4.6 >9.0 3.8 1.8 >9.0
-60 1.4 2.6 >9.0 -0.3 -1,8 >9.0
-70 0.2 -11.9 >9.0 -2.7 -9.2 -0.5
-77 -1.0 -21.6 8.1 -4.1 -17.6 -6.3
DTV (dBm) LTE Downlink TOV (dBm)
Channel 41 A B C D E F
-20 6.8 >9.0 >9.0 >9.0 >9.0 >9.0
-30 6.3 7.7 >9.0 >9.0 7.9 >9.0
-40 4.1 6.2 >9.0 7.7 5.3 >9.0
-50 3.8 4.5 >9.0 3.3 1.5 >9.0
-60 1.2 2.3 >9.0 -0.8 -2.2 >9.0
-70 0.0 -11.9 >9.0 -2.7 -12.1 -0.5
-77 -1.1 -21.6 8.4 -4.1 -19.2 -6.4
DTV (dBm) LTE Downlink TOV (dBm)
Channel 42 A B C D E F
-20 6.6 >9.0 >9.0 >9.0 >9.0 >9.0
-30 6.0 7.5 >9.0 >9.0 7.9 >9.0
-40 4.8 6.1 >9.0 7.7 4.9 >9.0
-50 2.5 4.6 >9.0 3.2 1.2 >9.0
-60 1.1 2.3 >9.0 -0.9 -2.5 8.4
-70 -0.2 -11.9 8.5 -3.1 -9,5 -0.4
-77 -1.5 -21.6 >9.0 -4.5 -17.3 -10.1
DTV (dBm) LTE Downlink TOV (dBm)
Channel 43 A B C D E F
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-20 6.6 >9.0 >9.0 >9.0 >9.0 >9.0
-30 5.8 7.4 >9.0 >9.0 7.9 >9.0
-40 3.3 5.9 >9.0 7.9 4.5 >9.0
-50 2.3 4.4 >9.0 3.0 0.8 >9.0
-60 0.8 2.1 >9.0 -1.1 -2.7 >9.0
-70 -0.6 -11.7 >9.0 -3.2 -9.5 -1,8
-77 -1.7 -21.5 >9.0 -4.8 -17.4 -6.4
DTV (dBm) LTE Downlink TOV (dBm)
Channel 44 A B C D E F
-20 5.0 >9.0 >9.0 >9.0 >9.0 >9.0
-30 4.1 7.4 >9.0 >9.0 7.6 >9.0
-40 1.8 5.8 >9.0 7.6 4.1 >9.0
-50 0.7 4.3 >9.0 2.7 0.4 >9.0
-60 -0.7 2.0 >9.0 -1.5 -3.0 7.5
-70 -2.0 -11.5 >9.0 -3.7 -9,6 -0.1
-77 -3.5 -21.4 >9.0 -5.2 -17.7 -7.7
DTV (dBm) LTE Downlink TOV (dBm)
Channel 45 A B C
D E F
-20 5.1 7.7 >9.0 >9.0 >9.0 >9.0
-30 3.9 7.0 >9.0 >9.0 7.1 >9.0
-40 1.5 5.5 >9.0 7.4 3.5 >9.0
-50 0.4 4.1 >9.0 2.5 -0.1 >9.0
-60 -1.0 1.8 >9.0 -1.7 -2.9 7.5
-70 -2.4 -11.6 >9.0 -3.9 -9.7 -0.6
-77 -4.0 -21.4 >9.0 -5.4 -17.5 -7.9
DTV (dBm) LTE Downlink TOV (dBm)
Channel 46 A B C D E F
-20 5.0 7.5 >9.0 >9.0 >9.0 >9.0
-30 3.7 6.7 >9.0 >9.0 6.4 >9.0
-40 1.4 5.3 >9.0 6.8 2.9 >9.0
-50 -0.1 3.8 >9.0 1.9 -0.7 >9.0
-60 -1.4 1.0 >9.0 -2.1 -4.1 7.5
-70 -3.0 -11.8 >9.0 -4.2 -9,6 -1.1
-77 -4.9 -21.6 >9.0 -5.8 -17.5 -8.1
DTV (dBm) LTE Downlink TOV (dBm)
Channel 47 A B C D E F
-20 4.8 7.8 >9.0 >9.0 7.9 >9.0
-30 3.4 6.8 >9.0 >9.0 6.0 >9.0
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-40 1.0 5.4 >9.0 3.1 2.6 >9.0
-50 -2.4 4.0 7.7 -8.1 -0.9 >9.0
-60 -12.4 1.3 -2.5 -19.0 -4.3 7.5
-70 -22.5 -11.8 -12.9 -29.3 -9.7 -1.6
-77 -31.2 -21.4 -21.0 -367 -17.4 -8.5
DTV (dBm) LTE Downlink TOV (dBm)
Channel 48 A B C D E F
-20 4.6 7.6 >9.0 >9.0 7.9 >9.0
-30 3.1 6.4 >9.0 7.5 5.4 >9.0
-40 0.5 5.0 >9.0 1.4 2.3 >9.0
-50 -4.8 3.6 4.9 -10.7 -1.3 >9.0
-60 -14.5 0.5 -4.8 -21.9 -4.6 7.3
-70 -24.8 -12.3 -15,4 -31,9 -9.7 -2.3
-77 -33.3 -21.5 -24.7 -39.9 -17.5 -9.8
DTV (dBm) LTE Downlink TOV (dBm)
Channel 49 A B C D E F
-20 4.3 7.7 >9.0 >9.0 7.9 >9.0
-30 2.9 6.3 >9.0 7.8 4.9 >9.0
-40 0.3 4.9 >9.0 2.6 1.7 >9.0
-50 -4.3 3.5 5.3 -9.3 -1.6 >9.0
-60 -14.0 0.4 -4.1 -20.7 -4.2 6.3
-70 -24.0 -13.2 -15.1 -30.8 -9,6 -3.4
-77 -33.5 -21.5 -27.6 -38.7 -17.5 -10.3
DTV (dBm) LTE Downlink TOV (dBm)
Channel 50 A B C D E F
-20 4.3 7.6 >9.0 >9.0 7.4 >9.0
-30 2.3 5.9 >9.0 7.7 4.4 >9.0
-40 0.2 4.6 >9.0 1.5 1.2 >9.0
-50 -5,7 3.3 3.5 -10.4 -2.0 >9.0
-60 -15.1 -0.5 -6.6 -21.9 -5.0 1.2
-70 -25,3 -15.2 -16.9 -29.9 -9,8 -6.1
-77 -34.2 -21.5 -25.3 -39.9 -17.5 -11.1
DTV (dBm) LTE Downlink TOV (dBm)
Channel 51 A B C D E F
-20 4.1 7.4 >9.0 >9.0 6.8 >9.0
-30 2.5 5.7 >9.0 7.6 3.7 >9.0
-40 -0.1 4.1 >9.0 1.6 0.6 >9.0
-50 -5.9 2.5 3.0 -10.5 -2.6 >9.0
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-60 -15.3 -6.3 -7.0 -21.9 -5.5 6.5
-70 -25.8 -16,6 -17.7 -32,3 -14.3 -4.7
-77 -35.1 -24.4 -26.2 -40.1 -22.7 -9.7
II) Results in Graphs – Downlink
The results are plotted in two types of charts. The first one shows the LTE level that causes the
TOV on the TV image for seven different TV receiving levels, with the TV channel under test as a
parameter, as in Figure 36. The second one shows a curve of LTE levels that cause the TOV on
the TV image as a function of the seven TV signal receiving levels, measured for each of the 37
channels tested, as can be seen in Figure 37.
The graph in Figure 36 shows the level of LTE downlink signal at the input of the receiver
A, where the vertical axis represents the average power inside the LTE bandwidth of 3 × 15 MHz,
while the horizontal axis represents the TV channels under test. Figure 37 is the same, except that
this time the horizontal axis represents the average TV signal power in the 6 MHz bandwidth at the
input of receiver A.
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Figure 36: LTE downlink level × TV channel – receiver A (can tuner)
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Figure 37: LTE downlink power × TV signal level – receiver A (can tuner)
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Figure 38: LTE downlink level × TV channel – receiver B (silicon tuner)
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Figure 39: LTE downlink level × TV level – receiver B (silicon tuner)
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Figure 40: LTE downlink level × TV channel – receiver C (can tuner)
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Figure 41: LTE downlink level × TV level – receiver C (can tuner)
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Figure 42: LTE downlink level × TV channel – receiver D (can tuner)
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Figure 43: LTE downlink level × TV level – receiver D (can tuner)
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Figure 44: LTE downlink level × TV channel – receiver E (silicon tuner)
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Figure 45: LTE downlink level × TV level – receiver E (silicon tuner)
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Figure 46: LTE downlink level × TV channel – receiver F (silicon tuner)
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Figure 47: LTE downlink level × TV level – receiver F (silicon tuner)
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2.7.3 Uplink TOV Measurement Results
The results are shown in Table 17 and plotted in Figure 48 to Figure 59.Error! Reference source
not found.
I) Table of Results
Table 17: TOV for LTE Uplink Interference
DTV (dBm) LTE Uplink (dBm)4
Channel 14 A B5 C D E F
-20 6.6 0.7 >10.0 9.4 >10.0 >10.0
-30 6.6 -6.4 >10.0 9.4 >10.0 >10.0
-40 6.4 -6.6 >10.0 8.4 7.0 >10.0
-50 5.4 -6.5 >10.0 1.2 3.0 >10.0
-60 2.2 -8.8 >10.0 >10.0 -0.2 >10.0
-70 2.0 -13.7 >10.0 >10.0 -2.9 0.8
-77 1.0 -14.2 >10.0 -0.4 -12.6 -6.9
DTV (dBm) LTE Uplink (dBm)
Channel 15 A B5 C D E F
-20 6.6 1.5 >10.0 9.4 >10.0 >10.0
-30 6.4 -6,5 >10.0 9.4 >10.0 >10.0
-40 6.0 -6.6 >10.0 8.2 >10.0 >10.0
-50 5.3 -6.7 >10.0 1.0 >10.0 >10.0
-60 2.0 -11.2 >10.0 -0.1 6.2 >10.0
-70 2.1 -13,7 >10.0 -0.4 -2.9 5.5
-77 0.9 -14.3 >10.0 -1.0 -11.1 -3.8
DTV (dBm) LTE Uplink (dBm)
Channel 16 A B5 C D E F
-20 6.5 0.6 >10.0 9.4 >10.0 >10.0
4 Note: The cells with values >10.0 in Table 17 indicate that the receiver did not reach the condition of TOV,
because the maximum output level of the test setup was reached. For the uplink signal the maximum power
was 10.0 dBm.
5 Note: The results for receiver B are highlighted in the red cells to indicate that they should not be
considered. Receiver B presented unstable behavior before the pulsed LTE signal interference.
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-30 6.3 -7.5 >10.0 9.4 >10.0 >10.0
-40 5.9 -7.1 >10.0 8.2 >10.0 >10.0
-50 5.4 -7.3 >10.0 1.0 >10.0 >10.0
-60 1.8 -14.3 >10.0 -0.8 9.3 >10.0
-70 1.6 -14.4 >10.0 -0.8 -2.8 5.4
-77 1.0 -14.7 >10.0 -1.2 -10.9 -4.2
DTV (dBm) LTE Uplink (dBm)
Channel 17 A B5 C D E F
-20 6.2 1.0 >10.0 9.4 >10.0 >10.0
-30 6.2 -7.1 >10.0 9.4 >10.0 >10.0
-40 5.8 -7.3 >10.0 8.4 >10.0 >10.0
-50 5.2 -7.3 >10.0 0.8 >10.0 >10.0
-60 1.7 -7.2 >10.0 -1.0 >10.0 >10.0
-70 1.5 -11.8 >10.0 -1.2 -2.8 5.4
-77 1.2 -16.3 >10.0 -1.6 -10.9 -3.6
DTV (dBm) LTE Uplink (dBm) Channel
018 A B5 C D E F
-20 6.3 0.9 >10.0 9.4 >10.0 >10.0
-30 5.8 -7.2 >10.0 9.4 >10.0 >10.0
-40 5.6 -7.3 >10.0 8.5 >10.0 >10.0
-50 5.2 -7.3 >10.0 0.9 >10.0 >10.0
-60 1.4 -7.3 >10.0 -1.2 >10.0 >10.0
-70 1.3 -11.7 >10.0 -1.3 -2.8 1.2
-77 0.1 -15.0 >10.0 -1.7 -11.0 -3.3
DTV (dBm) LTE Uplink (dBm)
Channel 19 A B5 C D E F
-20 6.2 0.1 >10.0 9.4 >10.0 >10.0
-30 6.0 -7.3 >10.0 9.4 >10.0 >10.0
-40 5.6 -7.4 >10.0 8.0 >10.0 >10.0
-50 5.5 -7.5 >10.0 0.7 >10.0 >10.0
-60 1.5 -7.5 >10.0 -1.4 8.9 >10.0
-70 1.4 -11.9 >10.0 -1.5 -2.8 4.1
-77 0.4 -15.3 >10.0 -1.9 -11.1 -5.0
DTV (dBm) LTE Uplink (dBm)
Channel 20 A B5 C D E F
-20 5.9 1.0 >10.0 9.4 >10.0 >10.0
-30 5.8 -7.3 >10.0 9.4 >10.0 >10.0
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-40 5.5 -7.3 >10.0 8.4 >10.0 >10.0
-50 5.0 -7.4 >10.0 0.6 >10.0 >10.0
-60 1.4 -7.5 >10.0 -1.5 9.3 >10.0
-70 1.3 -7.5 >10.0 -1,8 -2.6 1.2
-77 0.3 -15.3 >10.0 -2.1 -10.9 -6.3
DTV (dBm) LTE Uplink (dBm)
Channel 21 A B5 C D E F
-20 5.8 0.1 >10.0 9.4 >10.0 >10.0
-30 5.7 -7.3 >10.0 9.4 >10.0 >10.0
-40 5.3 -7.3 >10.0 8.7 >10.0 >10.0
-50 5.2 -7.3 >10.0 0.9 >10.0 >10.0
-60 1.2 -7.4 >10.0 -1.7 0.0 >10.0
-70 1.1 -7.8 >10.0 -1.9 -2.7 0.3
-77 0.5 -9.0 >10.0 -2.3 -10.8 -3.2
DTV (dBm) LTE Uplink (dBm)
Channel 22 A B5 C D E F
-20 5.7 0.6 9.0 9.4 >10.0 >10.0
-30 5.7 -7.6 >10.0 9.4 >10.0 >10.0
-40 5.3 -7.6 8.9 8.5 >10.0 >10.0
-50 5.3 -7.5 8.8 0.7 >10.0 >10.0
-60 1.1 -7.5 >10.0 -2.0 9.4 >10.0
-70 1.2 -8,3 >10.0 -2.0 -2.4 5.1
-77 0.3 -14.5 >10.0 -2.4 -10.7 -4.0
DTV (dBm) LTE Uplink (dBm)
Channel 23 A B5 C D E F
-20 5.6 0.7 >10.0 9.4 >10.0 >10.0
-30 5.4 -7.5 >10.0 9.4 >10.0 >10.0
-40 5.2 -7.5 >10.0 8.5 >10.0 >10.0
-50 4.8 -7.5 >10.0 0.7 >10.0 >10.0
-60 1.0 -7.6 >10.0 -2.0 8.3 >10.0
-70 1.0 -14.8 >10.0 -2.1 -2.6 4.8
-77 -0.1 -14.5 >10.0 -2.7 -10.7 -4.0
DTV (dBm) LTE Uplink (dBm)
Channel 24 A B5 C D E F
-20 5.1 0.8 >10.0 9.4 >10.0 >10.0
-30 5.0 -7.4 >10.0 9.4 >10.0 >10.0
-40 5.0 -7.4 8.8 8.5 >10.0 >10.0
-50 4.8 -7.4 8.3 0.9 >10.0 >10.0
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-60 0.6 -7.6 8.8 -2.1 9.4 >10.0
-70 0.6 -11.4 >10.0 -2.2 -2.6 -2.7
-77 -1.2 -14.4 >10.0 -2.5 -10.7 -4.4
DTV (dBm) LTE Uplink (dBm)
Channel 25 A B5 C D E F
-20 5.6 0.9 8.8 9.4 >10.0 >10.0
-30 5.4 -7.2 8.8 9.3 >10.0 >10.0
-40 5.0 -7.4 8.8 8.6 >10.0 >10.0
-50 4.6 -7.4 8.8 1.0 >10.0 >10.0
-60 1.3 -7.5 8.8 -2.1 9.4 >10.0
-70 1.2 -8.0 8.8 -2.2 -2.5 -3.1
-77 0.2 -9.2 8.8 -2.6 -10.7 -5.1
DTV (dBm) LTE Uplink (dBm)
Channel 26 A B5 C D E F
-20 5.3 0.8 9.0 9.4 >10.0 >10.0
-30 5.1 -7.4 >10.0 9.4 >10.0 >10.0
-40 4.7 -7.4 9.1 8.4 >10.0 >10.0
-50 4.3 -7.5 >10.0 0.8 >10.0 >10.0
-60 0.9 -7.6 9.1 -2.1 9.2 >10.0
-70 0.5 -8,1 9.1 -2.4 -2.4 4.4
-77 -0.3 -9.2 >10.0 -2.7 -10.7 -8.0
DTV (dBm) LTE Uplink (dBm)
Channel 27 A B5 C D E F
-20 5.3 4.8 >10.0 9.2 >10.0 >10.0
-30 5.1 -7.2 >10.0 9.2 >10.0 >10.0
-40 4.9 -7.4 >10.0 8.7 >10.0 >10.0
-50 4.2 -7.4 >10.0 1.2 >10.0 >10.0
-60 1.0 -7.6 >10.0 -2.2 9.3 >10.0
-70 0.8 -8.1 >10.0 -2.3 -2.5 3.9
-77 -0.3 -9.5 >10.0 -2.8 -10.6 -5.5
DTV (dBm) LTE Uplink (dBm)
Channel 28 A B5 C D E F
-20 5.8 0.8 >10.0 9.2 >10.0 >10.0
-30 5.0 -7.4 >10.0 9.2 >10.0 >10.0
-40 4.8 -7.4 >10.0 9.1 >10.0 >10.0
-50 4.2 -7.5 >10.0 4.7 >10.0 >10.0
-60 1.2 -7.6 >10.0 1.8 9.0 >10.0
-70 1.0 -8.4 >10.0 1.7 -2.4 2.3
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-77 -0.2 -9.5 >10.0 1.4 -10.8 -2.7
DTV (dBm) LTE Uplink (dBm)
Channel 29 A B5 C D E F
-20 5.5 0.8 >10.0 9.2 9.4 >10.0
-30 6.7 -7.6 >10.0 9.2 9.4 >10.0
-40 6.5 -7.6 >10.0 9.2 9.2 >10.0
-50 4.3 -7.7 >10.0 4.5 7.2 >10.0
-60 2.2 -8.0 >10.0 1.9 2.2 >10.0
-70 1.9 -18.1 >10.0 2.0 -2.6 5.0
-77 0.5 -21.9 >10.0 1.5 -11.0 -4.4
DTV (dBm) LTE Uplink (dBm)
Channel 30 A B5 C D E F
-20 5.4 0.9 >10.0 9.2 9.4 >10.0
-30 6.5 -7.5 >10.0 9.2 9.4 >10.0
-40 6.6 -7.6 >10.0 9.2 9.4 >10.0
-50 4.4 -7.6 8.7 4.5 8.4 >10.0
-60 2.3 -7,9 >10.0 2.2 3.6 >10.0
-70 2.2 -17.9 9.1 2.0 -2.8 4.6
-77 0.9 -22.1 >10.0 1.7 -10.8 -5.0
DTV (dBm) LTE Uplink (dBm)
Channel 31 A B5 C D E F
-20 5.3 0.6 >10.0 9.2 >10.0 >10.0
-30 6.1 -6.2 >10.0 9.2 9.4 >10.0
-40 6.5 -6.4 >10.0 9.2 9.4 >10.0
-50 3.8 -6.1 >10.0 4.8 9.4 >10.0
-60 2.1 -13,9 >10.0 2.3 8.8 >10.0
-70 1.7 -13,9 >10.0 2.2 -2.5 -1.0
-77 0.1 -14.4 >10.0 1.7 -10.8 -9.7
DTV (dBm) LTE Uplink (dBm)
Channel 32 A B5 C D E F
-20 5.3 1.3 9.3 9.2 >10.0 >10.0
-30 6.5 -6.3 >10.0 9.2 0.0 >10.0
-40 7.1 -6.2 9.2 9.2 9.4 >10.0
-50 4.3 -6.2 >10.0 5.3 9.4 >10.0
-60 2.6 -13.6 9.3 2.6 7.4 >10.0
-70 2.3 -14.2 9.3 2.5 -2.6 4.7
-77 1.3 -15.1 >10.0 2.0 -10.8 -4.4
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DTV (dBm) LTE Uplink (dBm)
Channel 33 A B5 C D E F
-20 5.5 1.0 >10.0 9.2 >10.0 >10.0
-30 6.9 -6.1 8.9 9.2 9.4 >10.0
-40 7.4 -6.3 9.3 9.2 9.4 >10.0
-50 4.3 -6.2 >10.0 5.5 9.4 >10.0
-60 2.9 -13.8 9.0 3.0 8.3 >10.0
-70 2.7 -14.2 >10.0 2.9 -2.7 4.6
-77 1.4 -15.2 >10.0 2.2 -10.8 -6.0
DTV (dBm) LTE Uplink (dBm)
Channel 34 A B5 C D E F
-20 5.5 1.2 >10.0 9.2 >10.0 >10.0
-30 6.6 -6.4 >10.0 9.2 >10.0 >10.0
-40 7.6 -6.4 >10.0 9.2 >10.0 >10.0
-50 4.2 -6.6 >10.0 5.7 >10.0 >10.0
-60 3.3 -11,4 >10.0 3.3 8.4 >10.0
-70 3.0 -14.2 >10.0 3.0 -2.7 4.7
-77 1.9 -15.2 >10.0 2.3 -10.8 -5.0
DTV (dBm) LTE Uplink (dBm)
Channel 35 A B5 C D E F
-20 5.7 1.1 >10.0 9.2 >10.0 >10.0
-30 6.8 -7.1 >10.0 9.2 >10.0 >10.0
-40 4.4 -7.3 >10.0 9.2 >10.0 >10.0
-50 4.6 -7.5 >10.0 6.1 >10.0 >10.0
-60 3.5 -12.5 >10.0 3.7 7.7 >10.0
-70 3.3 -21.7 >10.0 3.2 -2.7 4.3
-77 2.0 -23.9 >10.0 2.1 -10.9 -7.1
DTV (dBm) LTE Uplink (dBm)
Channel 36 A B5 C D E F
-20 5.7 1.1 >10.0 9.2 9.4 >10.0
-30 6.6 -7.1 >10.0 9.2 9.4 >10.0
-40 8.4 -7.3 >10.0 9.2 9.4 >10.0
-50 4.6 -7.3 >10.0 6.7 9.4 >10.0
-60 3.8 -14.9 >10.0 4.0 7.4 >10.0
-70 3.3 -22.9 >10.0 3.2 -2.8 3.9
-77 1.7 -24.5 >10.0 1.4 -10.8 -10.5
DTV (dBm) LTE Uplink (dBm)
Channel 38 A B5 C D E F
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-20 5.6 0.9 >10.0 9.2 >10.0 >10.0
-30 6.2 -7.5 >10.0 9.2 9.3 >10.0
-40 6.7 -7.7 >10.0 7.8 9.3 >10.0
-50 2.3 -7.7 9.1 2.0 9.3 >10.0
-60 -5.4 -15.9 2.8 -8.0 7.1 >10.0
-70 -15,8 -24.5 -7.5 -18.2 -3.0 3.8
-77 -24.9 -25.7 -17.5 -26.5 -11.2 -5.2
DTV (dBm) LTE Uplink (dBm)
Channel 39 A B5 C D E F
-20 5.5 0.2 >10.0 9.2 >10.0 >10.0
-30 6.2 -7.5 >10.0 9.2 >10.0 >10.0
-40 5.6 -7.7 >10.0 6.8 9.3 >10.0
-50 0.5 -7.9 9.3 -1.4 9.3 >10.0
-60 -7.8 -16.9 -0.4 -11.6 6.2 >10.0
-70 -18.6 -25.3 -10.8 -21.4 -5.9 3.5
-77 -27.9 -26.1 -21.9 -30.0 -13,7 -6.9
DTV (dBm) LTE Uplink (dBm)
Channel 40 A B5 C D E F
-20 5.6 0.7 >10.0 9.2 >10.0 >10.0
-30 6.2 -7.5 >10.0 9.2 9.3 >10.0
-40 6.6 -7.7 >10.0 7.8 9.3 >10.0
-50 2.7 -7.7 >10.0 3.2 9.1 >10.0
-60 -3.7 -17.1 3.3 -6.8 5.6 >10.0
-70 -14.2 -26,7 -6.7 -16,8 -3.4 3.5
-77 -23.2 -27.5 -15.6 -25.8 -11.5 -6.7
DTV (dBm) LTE Uplink (dBm)
Channel 41 A B5 C D E F
-20 5.8 0.7 >10.0 9.2 >10.0 >10.0
-30 6.3 -7.3 >10.0 9.2 >10.0 >10.0
-40 7.5 -7.7 >10.0 9.2 >10.0 >10.0
-50 4.3 -7,9 >10.0 7.5 8.9 >10.0
-60 3.2 -17,7 >10.0 5.0 5.8 >10.0
-70 1.0 -27.5 9.3 2.8 -3.5 5.0
-77 -1.8 -28.1 9.3 0.8 -11.6 -3.7
DTV (dBm) LTE Uplink (dBm)
Channel 42 A B5 C D E F
-20 5.4 0.5 >10.0 9.2 >10.0 >10.0
-30 6.6 -7.5 >10.0 9.2 0.0 >10.0
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-40 7.7 -7.7 >10.0 9.2 9.3 >10.0
-50 3.4 -8.1 >10.0 7.0 8.3 >10.0
-60 2.3 -19.5 >10.0 4.5 4.7 8.5
-70 1.1 -28.2 >10.0 3.2 -6.8 -1.1
-77 -1.3 -28.8 >10.0 1.3 -14.1 -9.9
DTV (dBm) LTE Uplink (dBm)
Channel 43 A B5 C D E F
-20 5.5 0.5 >10.0 9.2 >10.0 >10.0
-30 7.1 -7.5 >10.0 9.2 9.3 >10.0
-40 7.2 -7.7 >10.0 9.0 9.3 >10.0
-50 1.9 -12.7 >10.0 5.8 7.3 >10.0
-60 0.3 -21.1 >10.0 3.1 4.1 >10.0
-70 -1.9 -28.9 8.9 1.9 -7.0 4.7
-77 -5.5 -29.5 5.7 0.1 -14.4 -4.4
DTV (dBm) LTE Uplink (dBm)
Channel 44 A B5 C D E F
-20 5.3 -0.2 >10.0 9.2 >10.0 >10.0
-30 8.1 -8.5 >10.0 9.2 9.3 >10.0
-40 6.3 -8.7 >10.0 8.9 8.8 >10.0
-50 -0.2 -14.7 >10.0 3.5 6.2 >10.0
-60 -2.0 -22.3 9.3 0.1 3.6 >10.0
-70 -4.3 -30,3 6.8 -0.2 -7.3 5.2
-77 -8.0 -31.0 3.9 -1.6 -14.3 -3.6
DTV (dBm) LTE Uplink (dBm)
Channel 45 A B5 C D E F
-20 5.6 -0.2 >10.0 9.2 >10.0 >10.0
-30 8.8 -8.4 >10.0 9.2 9.3 >10.0
-40 7.8 -8.7 9.0 7.8 9.1 >10.0
-50 7.0 -15.5 9.3 0.0 5.6 >10.0
-60 -4.8 -23,9 8.9 -3.0 2.4 >10.0
-70 -5.4 -31.0 6.9 -3.1 -7.8 4.6
-77 -8.0 -31.9 4.9 -3.7 -15.3 -4.7
DTV (dBm) LTE Uplink (dBm)
Channel 46 A B5 C D E F
-20 3.2 -0.2 >10.0 9.2 9.3 >10.0
-30 -1.2 -8.5 >10.0 9.2 9.3 >10.0
-40 -9.0 -8.8 >10.0 2.7 7.7 >10.0
-50 -16.4 -17.4 7.0 -7.0 4.3 >10.0
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-60 -21,0 -26.6 6.6 -10.1 1.7 8.5
-70 -21.4 -32.4 5.4 -10.1 -9.3 2.3
-77 -23.8 -33.1 2.4 -11.1 -15.9 -9.1
DTV (dBm) LTE Uplink (dBm)
Channel 47 A B5 C D E F
-20 3.9 -0.4 >10.0 >10.0 9.3 >10.0
-30 -2.3 -8.5 >10.0 8.8 9.3 >10.0
-40 -9.2 -12.6 >10.0 0.5 7.4 >10.0
-50 -15.9 -20.2 6.0 -9.2 3.2 >10.0
-60 -20.3 -27.9 5.3 -12.4 0.7 6.7
-70 -21.1 -33,0 3.3 -12.3 -9.3 0.4
-77 -23.6 -33.3 -0.7 -13.2 -16.2 -7.5
DTV (dBm) LTE Uplink (dBm)
Channel 48 A B5 C D E F
-20 6.4 -0.4 >10.0 9.2 9.3 >10.0
-30 -1.4 -9,5 >10.0 6.9 8.1 >10.0
-40 -4.6 -13.8 8.5 -2.7 5.5 >10.0
-50 -13.6 -21.5 0.7 -11.8 1.9 >10.0
-60 -19.6 -30,6 -0.7 -14.7 -1.1 6.8
-70 -24.0o -34.5 -4.5 -16.1 -10.5 -1.3
-77 -27.3 -34.8 -8.5 -18.8 -17.9 -10.1
DTV (dBm) LTE Uplink (dBm)
Channel 49 A B5 C D E F
-20 5.8 -0.8 >10.0 9.2 8.3 >10.0
-30 -2.4 -9.3 >10.0 3.4 6.0 >10.0
-40 -7.2 -14.6 >10.0 -6.8 3.6 >10.0
-50 -16.6 -21.7 >10.0 -15.5 0.2 >10.0
-60 -22.0 -29.2 5.3 -18.3 -2.2 6.1
-70 -26.2 -35,1 -3.7 -19.3 -12.1 -3.7
-77 -30.8 -35.7 -13.1 -21.9 -19.6 -11.6
DTV (dBm) LTE Uplink (dBm)
Channel 50 A B5 C D E F
-20 3.7 -0.9 >10.0 8.6 6.5 >10.0
-30 -1.0 -9.5 >10.0 5.4 3.8 >10.0
-40 -6.8 -16,6 >10.0 -5.2 1.5 >10.0
-50 -14.0 -24.6 7.8 -15.5 -1.2 >10.0
-60 -22.0 -32.7 3.7 -22.8 -4.3 4.4
-70 -28.6 -36.7 -5.0 -24,0 -14.2 -4.6
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-77 32.4 -37.,0 -13.1 -26.3 -21.7 -11.2
DTV (dBm) LTE Uplink (dBm)
Channel 51 A B5 C D E F
-20 -0.2 -2.3 6.4 4.9 2.6 >10.0
-30 -3.2 -13.2 3.6 1.7 -0.6 >10.0
-40 -7.2 -20.4 0.0 -3.6 -3.5 7.7
-50 -12.7 -28.2 -5.1 -10.3 -5.6 -0.2
-60 -18.2 -37.7 -6.2 -21,0 -14.3 -9.6
-70 -26.3 -39.8 -15.2 -29.5 -23.1 -10.3
-77 -36.3 -42.0 -23.6 -34.7 -31.5 -16.7
II) Graphs of Results – Uplink
The results are plotted in two types of charts. The first one shows the LTE level that causes TOV
on the TV image for seven different TV receiving levels, with the TV channel under test as a
parameter, as shown in Figure 48. The second one shows the curve of LTE levels that cause the
TOV on the TV image for seven TV signal receiving levels, measured for each of the 37 channels
tested, as can be seen in Figure 49.
The graph in Figure 48 shows the level of the LTE uplink signal at the input of receiver A,
where the vertical axis represents the average power inside the LTE bandwidth of 3 × 15 MHz,
while the horizontal axis represents the TV channels under test. The same applies to Figure 49;
however this time the horizontal axis represents the average TV signal power in the 6 MHz
bandwidth at the input of receiver A.
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Figure 48: LTE uplink level × TV channel – receiver A (can tuner)
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Figure 49: LTE downlink level × TV level – receiver A (can tuner)
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Figure 50: LTE Uplink level × TV channel – receiver B (silicon tuner)
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Figure 51: LTE downlink level × TV level – receiver – B (silicon tuner)
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Figure 52: LTE Uplink level × TV channel – receiver C (can tuner)
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Figure 53: LTE downlink level × TV level – receiver – C (can tuner)
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Figure 54: LTE Uplink level × TV channel – receiver D (can tuner)
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Figure 55: LTE downlink level × TV level – receiver D (can tuner)
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Figure 56: LTE Uplink level × TV channel – receiver E (silicon tuner)
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Figure 57: LTE downlink level × TV level – receiver E (silicon tuner)
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Figure 58: LTE Uplink level × TV channel – receiver F (silicon tuner)
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Figure 59: LTE downlink level × TV level – receiver F (silicon tuner).
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2.7.4 LTE Co-Channel Interference in Digital Television
2.7.4.1 Necessity for Measurements
The Brazilian government intends to carry out the migration of the 703 to 803 MHz bandwidth,
currently allocated to TV broadcasting services, to LTE mobile services at different times by region
of the country. Thus, during the transition period, there will be regions with TV broadcasting
operating in the band 703 to 803 MHz as well as regions with LTE transmissions in the same
frequency band.
There may be a need, within the limits of two regions, to carry out coordination among the
different systems operating in the same frequency band. Thus, measurements of co-channel
interference of LTE signals over DTV were taken with the aim of obtaining PR data for the
coordination studies between these services.
In co-channel interference measurements, as the LTE signal contained in the DTV
channel bands enters the receiver directly, the TOV criterion is always reached for LTE signal
levels below the DTV signal level, so that the receiver is operated in a linear condition. For this
reason there are no Oth results for co-channel interference.
The information obtained can also be applied in the border regions between Brazil and the
other countries that have also adopted the ISDB-T system.
2.7.4.2 Results of Tests
The tests of co-channel interference were performed with the DTV in the channels allocated for
LTE operating frequency bands in the future. Channel 53 was selected for LTE uplink and channel
63 was selected for LTE downlink. The same settings and procedures were adopted as for
previous tests.
I) Table of Results
Downlink
Table 18: TOV for Co-Channel Interference – LTE Downlink
DTV (dBm) LTE Downlink (dBm)
Channel 63 A B C D E F
-20 -29.5 -23.2 -29.2 -29.1 -28.3 -28.4
-30 -39.6 -33.1 -39.2 -39.2 -38.2 -38.3
-40 -49.7 -43.1 -49.5 -49.1 -48.3 -48.4
-50 -58.6 -52.1 -60.1 -58.4 -57.9 -58.5
-60 -69.9 -58.8 -70.7 -70.7 -66.9 - 72.5
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Uplink
Table 19: TOV for Co–Channel Interference – LTE Uplink
DTV (dBm) LTE Uplink (dBm)
Channel 53 A B6 C D E F
-20 -33.2 -34.5 -32.2 -33.6 -31.7 -32.5
-30 -43.5 -44.6 -42.2 -43.5 -41.8 -42.7
-40 -53.7 -54.8 -52.3 -53.4 -52.0 -52.9
-50 -63.8 -65.8 -62.6 -63.6 -61.6 -63.2
-60 -73.3 - -72.4 -73.5 -71.7 -72.9
6 Note: The results for receiver B are highlighted in red cells to indicate that they should not be considered.
Receiver B presented unstable behavior before the pulsed LTE signal interference.
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II) Graph of Results
Downlink
Figure 60: LTE downlink level × TV level.
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Uplink
Figure 61: LTE uplink level × TV level
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2.7.5 Assessment of Results
2.7.5.1 Image Channel Interference
The can tuner receivers feature high degradation in the image channels, as can be seen from the
measurements results of LTE interference on the DTV. This phenomenon is illustrated in Figure
62, and it occurs due to the traditional frequency conversion architecture of superheterodyne
architecture adopted for TV channel tuning of the receivers, with an IF of 44 MHz. The existence of
image channels in the future LTE operation bands, however, is not so noticeable in the silicon
tuner receivers, because in general they adopt different architectures of frequency conversion from
the traditional ones.
Figure 62: Mechanism of image frequency of superheterodyne receivers
Another characteristic that can be found in the curves of LTE levels that cause TOV of the
TV image as a function of the TV signal level is the inclination of 45o for the TV channels whose
image frequency lies in the future LTE operation band. The inclination of 45o indicates that the
receiver is operating in a linear condition.
Figure 62 illustrates the tuning mechanism of receivers with superheterodyne architecture,
where the frequency of the Local Oscillator (LO) of the receiver is equal to the sum of the TV
channel frequency plus 44 MHz. Therefore all signals with frequencies f equal to the frequency of
the local oscillator fOL plus or minus 44 MHz will be folded in for the IF stage of the receiver.
f(MHz) = fOL(MHz) ± 44(MHz)
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Generalizing, for these receivers it is possible to consider any signal with a frequency
equal to the sum of the TV channel frequency plus 88 MHz as an "image" of the television channel
in question, and any signal present in this "image frequency band" can cause interference on the
TV channel in consideration if it has sufficient power level.
Figure 63 represents in blue color the current frequency band for TV, overlayed by the
proposed frequency bands for LTE in green for the uplink and in pink for the downlink. On the top,
in gray color, on the same scale of frequencies, are the TV channels’ image frequencies bands
tuned by receivers with 44 MHz IF frequency (local oscillator at 44 MHz above the center of the TV
channel), showing which TV channels will be potentially be interfered with by LTE signals.
Figure 63: Image frequencies of TV receivers with 44 MHz IF
2.7.5.2 Interference Due to Spurious Leakage of the Receiver Down-Converter
During the execution of the tests it was possible to observe, for receiver A, a phenomenon similar
to the image channel. But the affected channels were those that have a ratio of 5/8 in relation to
the frequency of the interference signal. This type of interference was observed only in receiver A.
2.7.5.3 Interference by LTE Channels Close to the TV Channels Due to the
Receiver Filtering System
Also notable is the increase in the performance degradation of the TV receivers under test for the
upper TV channels due to LTE uplink interference. This is due to, among other reasons, the sum of
the characteristics of the tracking filter frequency response and the characteristics of the receiver
IF filter frequency response. An important function of tracking filters of TV receivers is to mitigate
the image frequency signal. A typical value of the specification for the "image rejection" of a TV
receiver is of the order of 50 dB, with the tracking filter being mainly responsible for this rejection.
Another function is to mitigate the interference of adjacent channels. However, the response curve
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of the tracking filters varies from channel to channel, with the selectivity being reduced on higher
frequency TV channels. This characteristic is present in both can tuners and silicon tuners.
Figure 64: Example of tracking filter characteristic
2.7.5.4 Unstable Behavior of the TV Receiver Before a Pulsed LTE Interfering
Signal
It was also found, in the execution of the tests, that the receiver B presented unstable behavior
when subjected to a pulsed uplink interference signal. So the results of uplink interference for
receiver B are not accurate. It is suspected that this unstable behavior is due to the characteristic
of the Automatic Gain Control (AGC) circuit, mainly with regard to the time constant of the AGC.
2.7.5.5 Determination of PR and Oth values from TOV measurements
I) Definitions
a) Radio frequency protection ratio (PR)
This is the minimum value of the signal-to-interference required to obtain a specified reception
quality under specified conditions in the receiver input. The "specified reception quality, under
specified conditions," is defined in Section 2.4.
In general, the PR is specified as a function of frequency separation between the desired
signal and the interference signal in a given frequency range. In this report, "frequency separation"
is defined in terms of DTV channels in the UHF band. The graphs thus obtained, called curves of
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PR, represent the ability of the receiver to protect itself against interfering signals in frequencies
different from those in which it operates.
b) Receiver’s overload threshold (front-end)
The Oth is the level of the interfering signal, expressed in decibel-milliwatts, above which the
receiver begins to lose the ability to protect against interference signals operating in different
frequencies of the desired signal. Therefore, above the Oth the receiver behaves non-linearly but
does not necessarily fail immediately, depending on the receiver and on the interference
characteristics.
II) PR and Oth obtained by Tests
Through the data and interference test results’ curves, presented in Paragraphs 2.7.2 and 2.7.3,
the methodology recommended by ITU-R ReportError! Reference source not found.Error!
Reference source not found. BT.2215-2 [5] can be used. However, this methodology generates
difficulties because the results of TOV obtained in practice do not result in linear curves or exhibit
well-defined saturation points, giving margin for subjective interpretations of TOV curves and
consequently variations in results depending on the perception of the person analyzing the data.
Thus, in this study it was decided to adopt the following methodology:
A) Determination of PR: All Digital TV receivers should operate normally until the
threshold reception level, set at –77 dBm by the ABNT Standard. Therefore, the value at the DTV
reception level of –77 dBm was considered for the PR determination;
(B) Determination of the Oth: The LTE interferer signal level at which the PR of the given
channel deteriorates by 3 dB or more, when the desired DTV signal level is increased, was
considered as the level of Oth of a given TV channel. It was considered that a deviation of 1 dB
would not be suitable due to inaccuracies contained in the measurements.
Based on the methodology above, a Table of PRs was generated for all measured points.
From this Table of PRs we selected the PRs of the DTV level of –77 dBm of all channels of each
receiver tested, which were considered as the results of PR obtained in the tests. For the
determination of Oth we generated from the data of the Table of PR another table, called the Table
of ∆L, containing the values of the difference in PR of a certain level of DTV from the level
immediately below. The Oth of a given DTV channel would be the LTE signal level that caused a
PR deterioration greater than or equal to +3 dB.
The tables below have been developed considering the results of all DTV channels for
each receiver, with the columns "Worst PR" and "Worst Oth" showing the worst values among the
receivers tested for a specific DTV channel.
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Table 20: Downlink PR
A B C D E F
14 ‐71.3 ‐55.5 ‐85.4 ‐76.7 ‐63.2 ‐69.8 ‐55.5
15 ‐69.9 ‐55.5 ‐76.8 ‐61.7 ‐69.4 ‐55.5
16 ‐67.8 ‐56.1 ‐75.6 ‐61.9 ‐69.8 ‐56.1
17 ‐67.3 ‐56.0 ‐83.6 ‐75.6 ‐61.9 ‐69.0 ‐56.0
18 ‐68.6 ‐56.1 ‐83.4 ‐76.2 ‐61.7 ‐69.2 ‐56.1
19 ‐71.0 ‐56.1 ‐76.3 ‐61.8 ‐70.3 ‐56.1
20 ‐77.5 ‐56.2 ‐76.3 ‐59.1 ‐69.4 ‐56.2
21 ‐77.7 ‐55.8 ‐76.2 ‐58.1 ‐69.8 ‐55.8
22 ‐77.6 ‐55.6 ‐76.0 ‐58.8 ‐70.2 ‐55.6
23 ‐77.6 ‐60.9 ‐75.8 ‐60.6 ‐69.8 ‐60.6
24 ‐76.7 ‐60.9 ‐75.4 ‐61.7 ‐69.9 ‐60.9
25 ‐77.5 ‐61.2 ‐75.3 ‐62.0 ‐69.9 ‐61.2
26 ‐76.5 ‐60.8 ‐75.3 ‐61.9 ‐68.9 ‐60.8
27 ‐76.6 ‐60.8 ‐74.8 ‐61.7 ‐68.8 ‐60.8
28 ‐76.9 ‐60.8 ‐75.4 ‐61.9 ‐68.2 ‐60.8
29 ‐76.8 ‐60.9 ‐75.3 ‐61.7 ‐68.3 ‐60.9
30 ‐76.6 ‐60.8 ‐74.9 ‐61.7 ‐70.5 ‐60.8
31 ‐76.0 ‐60.8 ‐74.9 ‐61.8 ‐66.3 ‐60.8
32 ‐76.8 ‐55.3 ‐74.9 ‐61.8 ‐70.9 ‐55.3
33 ‐76.6 ‐55.2 ‐74.5 ‐61.9 ‐70.3 ‐55.2
34 ‐76.2 ‐55.3 ‐74.1 ‐61.8 ‐69.8 ‐55.3
35 ‐76.3 ‐55.3 ‐73.9 ‐61.9 ‐69.4 ‐55.3
36 ‐76.3 ‐55.4 ‐85.3 ‐73.4 ‐62.0 ‐66.8 ‐55.4
37 ‐76.2 ‐55.5 ‐77.0 ‐77.0 ‐55.5
38 ‐76.2 ‐55.3 ‐85.5 ‐73.4 ‐61.4 ‐70.0 ‐55.3
39 ‐76.2 ‐55.3 ‐73.3 ‐59.5 ‐69.8 ‐55.3
40 ‐76.0 ‐55.4 ‐85.1 ‐72.9 ‐59.4 ‐70.7 ‐55.4
41 ‐75.9 ‐55.4 ‐85.4 ‐72.9 ‐57.8 ‐70.6 ‐55.4
42 ‐75.5 ‐55.4 ‐72.5 ‐59.7 ‐66.9 ‐55.4
43 ‐75.3 ‐55.5 ‐72.2 ‐59.6 ‐70.6 ‐55.5
44 ‐73.5 ‐55.6 ‐71.8 ‐59.3 ‐69.3 ‐55.6
45 ‐73.0 ‐55.6 ‐71.6 ‐59.5 ‐69.1 ‐55.6
46 ‐72.1 ‐55.4 ‐71.2 ‐59.5 ‐68.9 ‐55.4
47 ‐45.8 ‐55.6 ‐56.0 ‐40.3 ‐59.6 ‐68.5 ‐40.3
48 ‐43.7 ‐55.5 ‐52.3 ‐37.1 ‐59.5 ‐67.2 ‐37.1
49 ‐43.5 ‐55.5 ‐49.4 ‐38.3 ‐59.5 ‐66.7 ‐38.3
50 ‐42.8 ‐55.5 ‐51.7 ‐37.1 ‐59.5 ‐65.9 ‐37.1
51 ‐41.9 ‐52.6 ‐50.8 ‐36.9 ‐54.3 ‐67.3 ‐36.9
Downlink PR (dBm) Worst PR
(dBm) TV CH
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Table 21: Uplink PR
A B C D E F
14 ‐78 ‐76,6 ‐64,4 ‐70,1 ‐64,4
15 ‐77,9 ‐76 ‐65,9 ‐73,2 ‐65,9
16 ‐78 ‐75,8 ‐66,1 ‐72,8 ‐66,1
17 ‐78,2 ‐75,4 ‐66,1 ‐73,4 ‐66,1
18 ‐77,1 ‐75,3 ‐66 ‐73,7 ‐66,0
19 ‐77,4 ‐75,1 ‐65,9 ‐72 ‐65,9
20 ‐77,3 ‐74,9 ‐66,1 ‐70,7 ‐66,1
21 ‐77,5 ‐74,7 ‐66,2 ‐73,8 ‐66,2
22 ‐77,3 ‐74,6 ‐66,3 ‐73 ‐66,3
23 ‐76,9 ‐74,3 ‐66,3 ‐71,6 ‐66,3
24 ‐75,8 ‐74,5 ‐66,3 ‐72,6 ‐66,3
25 ‐77,2 ‐85,8 ‐74,4 ‐66,3 ‐71,9 ‐66,3
26 ‐76,7 ‐74,3 ‐66,3 ‐69 ‐66,3
27 ‐76,7 ‐74,2 ‐66,4 ‐71,5 ‐66,4
28 ‐76,8 ‐78,4 ‐66,2 ‐74,3 ‐66,2
29 ‐77,5 ‐78,5 ‐66 ‐72,6 ‐66,0
30 ‐77,9 ‐78,7 ‐66,2 ‐72 ‐66,2
31 ‐77,1 ‐78,7 ‐66,2 ‐67,3 ‐66,2
32 ‐78,3 ‐79 ‐66,2 ‐72,6 ‐66,2
33 ‐78,4 ‐79,2 ‐66,2 ‐71 ‐66,2
34 ‐78,9 ‐79,3 ‐66,2 ‐72 ‐66,2
35 ‐79 ‐79,1 ‐66,1 ‐69,9 ‐66,1
36 ‐78,7 ‐78,4 ‐66,2 ‐66,5 ‐66,2
37 0,0
38 ‐52,1 ‐59,5 ‐50,5 ‐65,8 ‐71,8 ‐50,5
39 ‐49,1 ‐55,1 ‐47 ‐63,3 ‐70,1 ‐47,0
40 ‐53,8 ‐61,4 ‐51,2 ‐65,5 ‐70,3 ‐51,2
41 ‐75,2 ‐86,3 ‐77,8 ‐65,4 ‐73,3 ‐65,4
42 ‐75,7 ‐78,3 ‐62,9 ‐67,1 ‐62,9
43 ‐71,5 ‐82,7 ‐77,1 ‐62,6 ‐72,6 ‐62,6
44 ‐69 ‐80,9 ‐75,4 ‐62,7 ‐73,4 ‐62,7
45 ‐69 ‐81,9 ‐73,3 ‐61,7 ‐72,3 ‐61,7
46 ‐53,2 ‐79,4 ‐65,9 ‐61,1 ‐67,9 ‐53,2
47 ‐53,4 ‐76,3 ‐63,8 ‐60,8 ‐69,5 ‐53,4
48 ‐49,7 ‐68,5 ‐58,2 ‐59,1 ‐66,9 ‐49,7
49 ‐46,2 ‐63,9 ‐55,1 ‐57,4 ‐65,4 ‐46,2
50 ‐44,6 ‐63,9 ‐50,7 ‐55,3 ‐65,8 ‐44,6
51 ‐40,7 ‐53,4 ‐42,3 ‐45,5 ‐60,3 ‐40,7
TV CHUplink PR (dBm) Worst PR
(dBm)
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Table 22: Co-Channel PR
Receiver A B C D E F
Downlink Co-CH PR
(dBm) 9.9 -1.2 10.6 10.6 6.9 12.5
Uplink Co-CH PR
(dBm) 13.3 _ 12.4 13.5 11.7 12.9
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Table 23: Downlink Oth
A B C D E F
14 ‐3.7 7.6 1.5 ‐4.4 ‐4.4
15 ‐4.3 7.4 1.5 0.1 ‐4.3
16 ‐5.2 7.3 1.1 5.7 ‐5.2
17 ‐5.7 7.2 0.6 ‐0.1 ‐5.7
18 ‐4.7 7.1 8.4 0.8 ‐1.3 ‐4.7
19 ‐3 7.1 0.8 ‐3.6 ‐3.6
20 1.9 7.1 0.6 ‐4.7 ‐4.7
21 2 6.9 0.6 ‐5.3 ‐5.3
22 1.7 6.8 0.4 ‐5.4 ‐5.4
23 1.7 6.3 0.2 ‐4.3 ‐4.3
24 1.2 6.3 0 ‐2 ‐2.0
25 1.7 6.4 ‐0.2 ‐0.6 ‐0.6
26 0.7 5.8 ‐0.5 0.4 ‐0.5
27 0.7 6 ‐0.8 6 ‐0.8
28 1.1 5.9 ‐0.1 5.9 ‐0.1
29 1 5.7 ‐0.1 5.8 ‐0.1
30 1 5.6 ‐0.6 5.4 ‐0.6
31 0.7 5.5 ‐0.5 5 ‐0.5
32 0.9 5.6 ‐0.5 0 ‐0.5
33 0.9 5.3 ‐0.9 0.1 ‐0.9
34 0.6 5.4 ‐1.3 0 ‐1.3
35 0.6 5.3 ‐1.4 ‐0.1 ‐1.4
36 0.5 6 ‐2 ‐0.5 ‐2.0
37 0.5 5.1 0.5
38 0.2 4.9 ‐1.5 ‐1.8 ‐1.8
39 0.2 4.7 ‐2.3 ‐2.3 ‐2.3
40 0.2 4.6 8.8 ‐2.7 1.8 ‐2.7
41 0 4.5 ‐2.7 1.5 ‐2.7
42 ‐0.2 4.6 ‐3.1 ‐2.5 ‐3.1
43 ‐0.6 4.4 ‐3.2 ‐2.7 ‐1.8 ‐3.2
44 ‐2 4.3 ‐3.7 ‐3 7.5 ‐3.7
45 ‐2.4 4.1 ‐3.9 ‐2.9 ‐3.9
46 ‐3 3.8 ‐4.2 ‐4.1 ‐4.2
47 1 4 ‐4.3 ‐4.3
48 0.5 3.6 7.5 ‐4.6 ‐4.6
49 0.3 3.5 7.8 ‐4.2 ‐4.2
50 0.2 3.3 7.7 ‐5 1.2 ‐5.0
51 ‐0.1 4.1 7.6 ‐2.6 ‐2.6
TV CHDownlink Oth (dBm) Worst Oth
(dBm)
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Table 24: Uplink Oth
A B C D E F
14 1 ‐0,2 ‐0,2
15 0,9 ‐0,4 ‐0,4
16 1 ‐0,8 ‐0,8
17 1,2 ‐1,2 ‐1,2
18 0,1 ‐1,3 ‐1,3
19 0,4 ‐1,5 ‐1,5
20 0,3 ‐1,8 ‐1,8
21 0,5 ‐1,9 0 0,3 ‐1,9
22 0,3 8,9 ‐2 ‐2,0
23 ‐0,1 ‐2,1 ‐2,1
24 ‐1,2 8,3 ‐2,2 ‐2,7 ‐2,7
25 0,2 8,9 ‐2,2 ‐3,1 ‐3,1
26 ‐0,3 9,1 ‐2,4 ‐2,4
27 ‐0,3 ‐2,3 ‐2,3
28 ‐0,2 1,7 ‐0,2
29 0,5 2 2,2 0,5
30 0,9 2 3,6 0,9
31 0,1 2,2 9,4 0,1
32 1,3 9,3 2,5 9,4 1,3
33 1,4 8,9 2,9 9,4 1,4
34 1,9 3 1,9
35 2 3,2 2,0
36 1,7 3,2 9,4 1,7
37 0,0
38 6,7 9,1 7,8 9,3 6,7
39 5,6 9,2 9,3 5,6
40 2,7 7,8 9,1 2,7
41 1 9,3 2,8 8,9 1,0
42 1,1 3,2 8,3 1,1
43 ‐1,9 8,9 1,9 7,3 ‐1,9
44 ‐4,3 6,8 ‐0,2 6,2 ‐4,3
45 ‐5,4 6,9 ‐3,1 5,6 ‐5,4
46 ‐21,4 5,4 ‐10,1 4,3 8,5 ‐21,4
47 ‐21,1 3,3 ‐12,3 3,2 6,7 ‐21,1
48 ‐24 ‐4,5 ‐16,1 1,9 ‐24,0
49 ‐22 ‐19,3 0,2 ‐22,0
50 ‐28,6 7,8 ‐24 ‐1,2 ‐28,6
51 ‐12,7 ‐5,1 ‐3,6 ‐3,5 ‐9,6 ‐12,7
TV CHUplink Oth (dBm) Worst Oth
(dBm)
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A set of the most important scenarios of LTE signal interference in TV reception systems is
presented as follows.
3.1 Interferences by Radio Base Station
In this section we present a set of models of interference scenarios caused by radio base stations
(BSs) for different configurations of antenna installations in houses and residential buildings. The
Minimum Coupling Loss (MCL) method was adopted in the calculations of LTE interference levels
in the input of the TV receiver.
Note: Parameters from Resolution 625/2013 and from the report on the study of interference
conducted in Japan [6] (which in turn makes heavy use of parameters adopted by the ITU-R in its
interference studies) were used.
3.1.1 Residence with External Antenna
Figure 65: Illustration of BS interference over a TV receiver with external antenna
3 INTERFERENCE SCENARIOS
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Table 25: LTE BS Interference level on TV receiver with external antenna
BS LTE – TV Receiver with External Antenna
Item Description Measuring
Unit 1 LTE BS maximum transmitted power, e.r.p. 60.0 dBm 2 TX antenna radiation pattern
Horizontal plane 0.0 dB Vertical plane (downward tilt of 6.5°) -0.2 dB
3 TX BS LTE antenna EIRP in the direction of the TV antenna 59.8 dBm 4 Difference between antennas heights 30.0 M
5 Distance between antennas (for minimum total loss – antenna radiation pattern + free space loss)
214.0 M
6 Free space loss -76.1 dB 7 LTE signal level received by TV antenna -16.3 dBm 8 Other losses 9 TV antenna gain 12.7 dBi
10 RX antenna radiation pattern Horizontal plane 0.0 dB Vertical plane -0.6 dB
11 Booster gain dB 12 RX feeder loss -4.0 dB
LTE signal level in the TV's antenna input -8.2 dBm
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3.1.2 Residence with External Antenna and Booster
Figure 66: Illustration of LTE BS interference on TV receiver with external antenna and booster
BS LTE – TV Receiver with External Antenna and Booster
Horizontal plane 0.0 dB Vertical plane (downward tilt of 6.5°) -0.4 dB
3 TX BS LTE antenna EIRP in the direction of the TV antenna 59.6 dBm 4 Difference between antenna heights 38.5 m
5 Distance between antennas (for minimum total loss – antenna radiation pattern + free space loss)
269.0 m
6 Free space loss -77.9 dB 7 Other losses (wall penetration loss) -10.0 dB 8 LTE signal level received by TV antenna -28.3 dBm 9 TV antenna gain 0.0 dBi
10 RX antenna radiation pattern Horizontal plane 0.0 dB Vertical plane -0.1 dB
11 Booster gain 25.0 dB 12 RX feeder loss -2.0 dB
LTE signal level in the TV's antenna input -5.4 dBm
Table 28: BS LTE interference level on TV receiver with amplified internal antenna
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3.1.5 Building with DTV Collective Antenna, Co-Located with LTE BS Antenna
For this scenario, a typical model of TV signal distribution in an apartment building was
established and DTV signal gains and losses for the distribution system were set according to
section11, "Considerations on Link Budget", of the DTV Standard ABNT NBR 15608 2D1:2008
[22] for a typical apartment. Once the parameters of the DTV distribution system were set, the level
of the interfering LTE signal was calculated for the scenario.
Error! Reference source not found. shows a typical case of a DTV signal distribution
model
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Figure 69: Model of DTV signal distribution with internal amplifier inside the apartment building
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Figure 70: Illustration of LTE BS interference on DTV collective antenna co-located with LTE antenna on the roof top of an apartment building
Table 29: LTE BS interference level on DTV receiver, with co-localized collective antenna
BS LTE – TV Receiver with Co-Localized Collective Antenna