LTE / DVB Coexistencefinding compromise
towardsInternet of Everything
Regulatory & Industry AllianceState-of-Art (SoA) / Status
Update Q1’2013
Thierry Lestable (MS’97, Ph.D’03)Technology & Innovation Manager, Sagemcom
© Thierry Lestable, 20122
Disclaimer
• Besides Sagemcom SAS’, many 3rd party copyrighted material is reused within this brief tutorial under the ‘fair use’ approach, for sake of educational purpose only, and very limited edition.
• As a consequence, the current slide set presentation usage is restricted, and is falling under usual copyright usage.
• Thanks for your understanding!
3GPP Requirements: UE
Spectrum emission limit (dBm)/ Channel bandwidth
∆fOOB (MHz)
1.4 MHz
3.0 MHz
5 MHz
10 MHz
15 MHz
20 MHz
Measurement bandwidth
± 0-1 -10 -13 -15 -18 -20 -21 30 kHz ± 1-2.5 -10 -10 -10 -10 -10 -10 1 MHz
± 2.5-2.8 -25 -10 -10 -10 -10 -10 1 MHz ± 2.8-5 -10 -10 -10 -10 -10 1 MHz ± 5-6 -25 -13 -13 -13 -13 1 MHz
± 6-10 -25 -13 -13 -13 1 MHz ± 10-15 -25 -13 -13 1 MHz ± 15-20 -25 -13 1 MHz ± 20-25 -25 1 MHz
Spectrum Emission Mask (SEM)
Channel bandwidth
1.4MHz
3.0MHz
5MHz
10MHz
15MHz
20MHz
∆fOOB (MHz) 2.8 6 10 15 20 25
Source: 3GPP TS 36.101 V11.3.0 (2012-12)
3GPP SEM – Additional Requirements
NS_03 NS_04
Spectrum emission limit (dBm)/ Channel bandwidth ∆fOOB(MHz)
1.4MHz
3.0MHz
5MHz
10MHz
Measurement bandwidth
±±±± 0-0.1 -13 -13 -15 -18 30 kHz ±±±± 0.1-1 -13 -13 -13 -13 100 kHz±±±± 1-2.5 -13 -13 -13 -13 1 MHz
±±±± 2.5-2.8 -25 -13 -13 -13 1 MHz±±±± 2.8-5 -13 -13 -13 1 MHz±±±± 5-6 -25 -13 -13 1 MHz
±±±± 6-10 -25 -13 1 MHz±±±± 10-15 -25 1 MHz
Spectrum emission limit (dBm)/ Channel bandwidth ∆fOOB(MHz)
1.4MHz
3.0MHz
5MHz
10MHz
15MHz
20MHz
Measurement
bandwidth±±±± 0-1 -10 -13 -15 -18 -20 -21 30 kHz
±±±± 1-2.5 -13 -13 -13 -13 -13 -13 1 MHz±±±± 2.5-
2.8-25 -13 -13 -13 -13 -13 1 MHz
±±±± 2.8-5 -13 -13 -13 -13 -13 1 MHz±±±± 5-6 -25 -25 -25 -25 -25 1 MHz
±±±± 6-10 -25 -25 -25 -25 1 MHz±±±± 10-15 -25 -25 -25 1 MHz±±±± 15-20 -25 -25 1 MHz±±±± 20-25 -25 1 MHz
Spectrum emission limit (dBm)/ Channel bandwidth ∆fOOB(MHz)
1.4MHz
3.0MHz
5MHz
10MHz
15MHz
20MHz
Measurement
bandwidth±±±± 0-1 -10 -13 -15 -18 -20 -21 30 kHz
±±±± 1-2.5 -13 -13 -13 -13 -13 -13 1 MHz±±±± 2.5-2.8
-25 -13 -13 -13 -13 -13 1 MHz
±±±± 2.8-5 -13 -13 -13 -13 -13 1 MHz±±±± 5-6 -25 -13 -13 -13 -13 1 MHz
±±±± 6-10 -25 -13 -13 -13 1 MHz±±±± 10-15 -25 -13 -13 1 MHz±±±± 15-20 -25 -13 1 MHz±±±± 20-25 -25 1 MHz
NS_06/NS_07
Adjacent Channel Leakage Ratio (ACLR)
E-UTRAACLR1 UTRA ACLR2 UTRAACLR1
RB
E-UTRA channel
∆fOOB
Spurious EmissionsFrequency Range Maximum Level Measurement Bandwidth
9 kHz ≤≤≤≤ f < 150 kHz -36 dBm 1 kHz
150 kHz ≤≤≤≤ f < 30 MHz -36 dBm 10 kHz
30 MHz ≤≤≤≤ f < 1000 MHz -36 dBm 100 kHz
1 GHz ≤≤≤≤ f < 12.75 GHz -30 dBm 1 MHz
3GPP Mobile (UE) Requirements - Spurious
emission band UE co-existenceTable 6.6.3.2-1: Requirements
E-UTRA BandSpurious emission
Protected band Frequency range (MHz) Maximum Level (dBm)
MBW (MHz)
Note
20 E-UTRA Band 1, 3, 7, 8, 20, 22, 33, 34, 43
FDL_low - FDL_high -50 1
E-UTRA Band 20 FDL_low - FDL_high -50 1 15
E-UTRA Band 38, 42 FDL_low - FDL_high -50 1 2
NOTE 2: As exceptions, measurements with a level up to the applicable requirements defined in Table 6.6.3.1-2 are permitted for each assigned E-UTRA carrier used in the measurement due to 2nd, 3rd, 4th [or 5th] harmonic spurious emissions. An exception is allowed if there is at least one individual RB within the transmission bandwidth (see Figure 5.6-1) for which the 2nd, 3rd or 4th harmonic totally or partially overlaps the measurement bandwidth (MBW).
NOTE 15: These requirements also apply for the frequency ranges that are less than ∆fOOB (MHz) in Table 6.6.3.1-1 and Table 6.6.3.1A-1 from the edge of the channel bandwidth.
3GPP TS 36.101 V11.3.0 (2012-12)
3GPP Mobile (UE) Requirements - Band 20
Table 6.2.2-1: UE Power Class
3GPP TS 36.101 V11.3.0 (2012-12)
EUTRA band
Class 1 (dBm)
Tolerance (dB)
Class 2 (dBm)
Tolerance (dB)
Class 3 (dBm)
Tolerance (dB)
Class 4 (dBm)
Tolerance (dB)
20 23 ±22
NOTE 2: 2 refers to the transmission bandwidths (Figure 5.6-1) confined within FUL_low and FUL_low + 4 MHz or FUL_high –4 MHz and FUL_high, the maximum output power requirement is relaxed by reducing the lower tolerance limit by 1.5 dB
3GPP Base Station (eNB) Requirements - DTT Protection
Table G-1: EIRP limits for protection of broadcasting (DTT) service
Case Measurement filter centre frequency
Condition on BS maximum aggregate EIRP
/ 10 MHz, PEIRP_10MHz(Note)
Maximum LevelPEIRP,N,MAX
Measurement Bandwidth
A: for DTT frequencies where broadcasting is protected
N*8 + 306 MHz, 21 ≤ N ≤ 60
PEIRP_10MHz ≥ 59 dBm 0 dBm 8 MHz
N*8 + 306 MHz, 21 ≤ N ≤ 60
36 ≤ PEIRP_10MHz < 59 dBm PEIRP_10MHz – 59 dBm 8 MHz
N*8 + 306 MHz, 21 ≤ N ≤ 60
PEIRP_10MHz < 36 dBm -23 dBm 8 MHz
B: for DTT frequencies where broadcasting is subject to an intermediate level of protection
N*8 + 306 MHz, 21 ≤ N ≤ 60
PEIRP_10MHz ≥ 59 dBm 10 dBm 8 MHz
N*8 + 306 MHz, 21 ≤ N ≤ 60
36 ≤ PEIRP_10MHz < 59 dBm PEIRP_10MHz – 49 dBm 8 MHz
N*8 + 306 MHz, 21 ≤ N ≤ 60
PEIRP_10MHz < 36 dBm -13 dBm 8 MHz
C: for DTT frequencies where broadcasting is not protected
N*8 + 306 MHz, 21 ≤ N ≤ 60
N.A. 22 dBm 8 MHz
NOTE: PEIRP_10MHz (dBm) is defined by the expression PEIRP_10MHz = P10MHz + Gant + 10*log10(Nant )
3GPP TS 36.104 V11.3.1 (2013-01)
3GPP Base Station (eNB) Requirements
BS class PRATWide Area BS - (note)
Medium Range BS < + 38 dBm
Local Area BS < + 24 dBm
Home BS < + 20 dBm (for one transmit antenna port)< + 17 dBm (for two transmit antenna ports)< + 14dBm (for four transmit antenna ports) < + 11dBm (for eight transmit antenna ports)
NOTE: There is no upper limit for the rated output power of the Wide Area Base Station.
Table 6.2-1: Base Station rated output power
3GPP TS 36.104 V11.3.1 (2013-01)
3GPP Base Station (eNB) Requirements - Transmitter RF
Spectrum
Table 6.6.3.2.1-3: General operating band unwanted emission limits for 5, 10, 15 and 20 MHz channel bandwidth (E-UTRA bands <1GHz) for Category B
3GPP TS 36.104 V11.3.1 (2013-01)
Frequency offset of measurement
filter -3dB point, ∆∆∆∆f
Frequency offset of measurement filter centre
frequency, f_offset
Minimum requirement (Note 1) Measurement bandwidth (Note
4)
0 MHz ≤ ∆f < 5 MHz 0.05 MHz ≤ f_offset < 5.05 MHz 100 kHz
5 MHz ≤ ∆f < min(10 MHz, ∆fmax)
5.05 MHz ≤ f_offset < min(10.05 MHz, f_offsetmax)
-14 dBm 100 kHz
10 MHz ≤ ∆f ≤ ∆fmax 10.05 MHz ≤ f_offset < f_offsetmax
-16 dBm (Note 6) 100 kHz
NOTE 1:For a BS supporting non-contiguous spectrum operation the minimum requirement within sub-block gaps is calculated as a cumulative sum of adjacent sub blocks on each side of the sub block gap. Exception is Df ≥ 10MHz from both adjacent sub blocks on each side of the sub-block gap, where the minimum requirement within sub-block gaps shall be -16dBm/100kHz.
dBMHz
offsetfdBm
−⋅−− 05.0_
5
77
Wide Area BS - Category B (Option 1) - Band 20
LTE UE – Measurements
Source: Ofcom (August 2012)
Pmax: 23dBmBW: 10MHz50 RBsBlock C (UK)@857MHz16QAM
LTE Uplink interferencetowards DTT Rx – Use cases
Source:Ofcom (Feb.2012)
Set-Top DTT receptionFixed Roof-top DTT reception
Protection Ratio (PR) –Interference – Example/Link budget
ITU-R 419-3
Source:Ofcom / Real Wireless (Feb.2012)
Minium Separation distance (m): DTT @786MHz
100% LTE Interference Activity 10% LTE Interference Activity
Source:Ofcom (Feb.2012)
ITU-R: RECOMMENDED Protection Ratio (PR) & Overload Threshold
(Oth)
Source: ITU-R (Nov.2012 )WP6A
To be used for sharing studies (Mix of different tuners categories)
DTT – Categories of Radiated & conducted interferences (1/2)
Source: Digital Europe, Dec.2012
AGC
Low-Pass Filter
CENELEC – ETSI 2011: Joint Working Group (JWG) on Digital
Dividend
http://docbox.etsi.org/Etsi_Cenelec/PUBLIC%20FOLDER%20on%20DD/
Source: CENELEC/ETSI
D-Book 7 (DTG)(1/4)
•Digital Book 7, part A• Section 9.14.2.1
‘Interference from LTE Signals’
•“The exact mechanism for this is not yet understood, butit is thought that it may be caused by disturbances to thereceiver's automatic gain control (AGC) circuitryresulting from the time-varying LTE signal . Equally, ithas been seen that some well-designed receivers arevirtually immune to the differences between the constantpower signals and the time-varying signals.
•To minimise the risk of disturbance to televisionreception, it is very important therefore that receiverdesigners ensure that their implementations areunaffected by such time-varying LTE signals. The restof this section first describes the interferenceenvironment, and then some preliminary tests.
•Note that these tests are considered preliminary atthis stage, so it may be considered necessary to changethem in the near future. For the avoidance of doubt,these LTE protection ratios are the values that will beused for testing new receivers , but it should beremembered that some older receivers alreadydeployed may have significantly worse performance inthis respect .”
V1, March 2011 / V2, March 2012
D-Book 7 (DTG)(2/4)
•Worst cases for interferences:-Low activity (BS/UE)
- � Time-varying signal enveloppe
-DTT receiver architecture- CAN tuner (super-
heterodyne): band C worst
- Si Tuner: Band A worst
Preliminary LTE interference test tolerances
LTE interference test conditions
NorDig v2.4
NorDigrequirementsare the mostdemanding!Even harder than DTG
(UK)
Table 3.17, p.51
Orange FR DD frequencies
January 2013
France
@800MHz@2,6GHz
Trials in 2012
Marseille Lyon
Mass Commercial Launch in 2013
N.B1: deployment @800MHz expected to be slow due to frequency plan from ANFR + potential issues with Digital TVN.B2: @2.6GHz, still issues with some geographical locationsN.B3: @1800 MHz, Waiting for Official Answer from ARCEP to allow Bouygues Telecom to refarm its 1800MHz with LTE
Lille
NXP Tuners Released
TDA 18218
08/07/2009
TDA 18212*
26/08/2010 11/02/2013
TDA 18214
Strong Immunity to LTE & WLANSClaimed by NXP
Jan.2013
Feb.2011
Mar.2012
Jul.2012
EN 55020/A11
D-Book 7, v2
JWG DD
Dec.2012
Nov.2012
Jun.2010
Report 148
*SW upgrade feasible to reach DTG & NorDig Requirements
Mar.2011
D-Book 7, v1
Open Discussions w.r.t Standard & Certification
Strategy•EN 55020i)Amendment to cover all Types of DVB receivers, not only cable?ii)CISPR 35 proposal: prEN55035
i) 3V/m to be relaxed to 1V/m?ii) Whole band [470-862]
instead of [790-862]?
•Strategy/approachi)EMC Directivesii)Voluntary & applied Certification System (e.g. NorDig, D-Book, …)
Thanks for your attention…
Any Question, any interest in Internship and/or Job application: