Band III issues (Overview of the activities within Task Group 6/8: Use of the band 174 – 230 MHz) Ben Smith Radiocommunications Agency Netherlands BR Information Meeting on RRC-04/05 (Geneva, 18 – 19 September 2003)
Band III issues (Overview of the activities within Task Group 6/8: Use of the band 174 – 230 MHz) Ben Smith Radiocommunications Agency Netherlands BR Information.
Mar 27, 2015
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Band III issues
(Overview of the activities within Task Group 6/8: Use of the band 174 – 230 MHz)
Ben Smith
Radiocommunications Agency Netherlands
BR Information Meeting on RRC-04/05 (Geneva, 18 – 19 September 2003)
Overview Band III issues (Chap.7)
• Why special attention for Band III ?
“Frequency usage of Band III and sharing between digital sound and television broadcasting”
– Physics: orders of magnitude
– History: ST52/GE63 ….
– Choices for planning: type of systems, rasters
• Sharing scenario’s• Open (technical) issues• Future: flexibility, but how ?
What is so special about Band III ?
Physics: 174-230 vs. 470-862 MHz for Band IV/V
(or 1.7–1.3 vs. 0.64-0.35 m)
What is so special about Band III ?
Long history of existing stations: - ST52 and ST61 for EBA
– GE63 and GE89 for ABA
Resulting in a mixture of systems and rasters
System B
System B (Italy)
Systems B1,D,I,K1
System L
What is so special about Band III ?
Different systems to be planned: television AND soundBandwidths: analog TV(7 and 8 MHz), DVB-T(6,7 or 8MHz), T-DAB(1.75MHz)
Different characteristics: minimum field strength, protection ratio
What is so special about Band III ?
Different characteristics: minimum field strength
Reception modeLocation
probability
Minimum median equivalent field strength (dB(μV/m))
DVB-T
T-DAB, Protection
level 3 Code rate QPSK 16QAM 64QAM
Fixed antenna 0.95 2/3 36 42 48 37
Portable outdoor0.700.95
2/35056
5662
6167
4854
Portable indoor Ground floor
0.700.95
2/35865
6471
6976
5663
Mobile 0.99 2/3 60 66 71 58
What is so special about Band III ?
Different characteristics: max. interfering field strength Maximum permissible interfering field strength (= minimum median equivalent field strength – Protection Ratio – combined location correction factor) fix – fixed, po – portable outdoor, pi – portable indoor, mob – mobile; the numbers 70, 95 and 99 indicate the location probability
Wanted signal
fix95 po70 po95 pi70 pi95 mob99 Interfering signal T-DAB DVB-T T-DAB DVB-T T-DAB DVB-T T-DAB DVB-T T-DAB DVB-T T-DAB DVB-T T-DAB 14 9 34 29 31 26 41 36 38 33 30 25 DVB-T 20 15 40 35 37 32 47 42 44 39 36 31
The values in this Table are given for the co-channel situation, and are based on the 7 MHz DVB-T system. For DVB-T interfered with by T-DAB, the worst case is taken: four T-DAB blocks of equal power interfering at the same time with one DVB-T channel. The values in this Table are derived from Chapter 5 and rounded to integers.
Different characteristics: max. interfering field strength (1)
Minimum field strength (dBuV/m) Source: Doc. 6-8/133, 'Digital broadcasting in Band III'; BPN 043 issue 2; EBU, May 2003.
fix - fixed, po - portable outdoor, pi - portable indoor, mob - mobile; the numbers 70, 95 and 99 indicate the location probability
Wanted signalDVB-T
T-DAB QPSK 16QAM 64QAMInterfering signal fix95 po70 po95 pi70 pi95 mob99 fix95 po70 po95 pi70 pi95 mob99 fix95 po70 po95 pi70 pi95 mob99 fix95 po70 po95 pi70 pi95 mob99
T-DAB fix95 30 47 53 55 62 58 36 40 46 48 55 50 42 46 52 54 61 56 48 51 58 60 67 61
po70 30 47 53 55 62 58 36 40 46 48 55 50 42 46 52 54 61 56 48 51 58 60 67 61
po95 30 47 53 55 62 58 36 40 46 48 55 50 42 46 52 54 61 56 48 51 58 60 67 61
pi70 30 47 53 55 62 58 36 40 46 48 55 50 42 46 52 54 61 56 48 51 58 60 67 61
pi95 30 47 53 55 62 58 36 40 46 48 55 50 42 46 52 54 61 56 48 51 58 60 67 61
mob99 30 47 53 55 62 58 36 40 46 48 55 50 42 46 52 54 61 56 48 51 58 60 67 61
DVB-T fix95 30 47 53 55 62 58 36 40 46 48 55 50 42 46 52 54 61 56 48 51 58 60 67 61
QPSK po70 30 47 53 55 62 58 36 40 46 48 55 50 42 46 52 54 61 56 48 51 58 60 67 61
po95 30 47 53 55 62 58 36 40 46 48 55 50 42 46 52 54 61 56 48 51 58 60 67 61
pi70 30 47 53 55 62 58 36 40 46 48 55 50 42 46 52 54 61 56 48 51 58 60 67 61
pi95 30 47 53 55 62 58 36 40 46 48 55 50 42 46 52 54 61 56 48 51 58 60 67 61
mob99 30 47 53 55 62 58 36 40 46 48 55 50 42 46 52 54 61 56 48 51 58 60 67 61
DVB-T fix95 30 47 53 55 62 58 36 40 46 48 55 50 42 46 52 54 61 56 48 51 58 60 67 61
16QAM po70 30 47 53 55 62 58 36 40 46 48 55 50 42 46 52 54 61 56 48 51 58 60 67 61
po95 30 47 53 55 62 58 36 40 46 48 55 50 42 46 52 54 61 56 48 51 58 60 67 61
pi70 30 47 53 55 62 58 36 40 46 48 55 50 42 46 52 54 61 56 48 51 58 60 67 61
pi95 30 47 53 55 62 58 36 40 46 48 55 50 42 46 52 54 61 56 48 51 58 60 67 61
mob99 30 47 53 55 62 58 36 40 46 48 55 50 42 46 52 54 61 56 48 51 58 60 67 61
DVB-T fix95 30 47 53 55 62 58 36 40 46 48 55 50 42 46 52 54 61 56 48 51 58 60 67 61
64QAM po70 30 47 53 55 62 58 36 40 46 48 55 50 42 46 52 54 61 56 48 51 58 60 67 61
po95 30 47 53 55 62 58 36 40 46 48 55 50 42 46 52 54 61 56 48 51 58 60 67 61
pi70 30 47 53 55 62 58 36 40 46 48 55 50 42 46 52 54 61 56 48 51 58 60 67 61
pi95 30 47 53 55 62 58 36 40 46 48 55 50 42 46 52 54 61 56 48 51 58 60 67 61
mob99 30 47 53 55 62 58 36 40 46 48 55 50 42 46 52 54 61 56 48 51 58 60 67 61
Different characteristics: max. interfering field strength (2)
Protection ratio (dB) Source: Doc. 6-8/133, 'Digital broadcasting in Band III'; BPN 043 issue 2; EBU, May 2003.DVB-T 7 MHz signal, code rate 2/3fix - fixed, po - portable outdoor, pi - portable indoor, mob - mobile; the numbers 70, 95 and 99 indicate the location probability
Wanted signalDVB-T
T-DAB QPSK 16QAM 64QAMInterfering signal fix95 po70 po95 pi70 pi95 mob99 fix95 po70 po95 pi70 pi95 mob99 fix95 po70 po95 pi70 pi95 mob99 fix95 po70 po95 pi70 pi95 mob99
T-DAB fix95 8 10 10 10 10 10 15 17 17 17 17 17 21 23 23 23 23 23 26 28 28 28 28 28
po70 8 10 10 10 10 10 15 17 17 17 17 17 21 23 23 23 23 23 26 28 28 28 28 28
po95 8 10 10 10 10 10 15 17 17 17 17 17 21 23 23 23 23 23 26 28 28 28 28 28
pi70 8 10 10 10 10 10 15 17 17 17 17 17 21 23 23 23 23 23 26 28 28 28 28 28
pi95 8 10 10 10 10 10 15 17 17 17 17 17 21 23 23 23 23 23 26 28 28 28 28 28
mob99 8 10 10 10 10 10 15 17 17 17 17 17 21 23 23 23 23 23 26 28 28 28 28 28
DVB-T fix95 2 4 4 4 4 4 9 11 11 11 11 11 15 17 17 17 17 17 20 22 22 22 22 22
QPSK po70 2 4 4 4 4 4 9 11 11 11 11 11 15 17 17 17 17 17 20 22 22 22 22 22
po95 2 4 4 4 4 4 9 11 11 11 11 11 15 17 17 17 17 17 20 22 22 22 22 22
pi70 2 4 4 4 4 4 9 11 11 11 11 11 15 17 17 17 17 17 20 22 22 22 22 22
pi95 2 4 4 4 4 4 9 11 11 11 11 11 15 17 17 17 17 17 20 22 22 22 22 22
mob99 2 4 4 4 4 4 9 11 11 11 11 11 15 17 17 17 17 17 20 22 22 22 22 22
DVB-T fix95 2 4 4 4 4 4 9 11 11 11 11 11 15 17 17 17 17 17 20 22 22 22 22 22
16QAM po70 2 4 4 4 4 4 9 11 11 11 11 11 15 17 17 17 17 17 20 22 22 22 22 22
po95 2 4 4 4 4 4 9 11 11 11 11 11 15 17 17 17 17 17 20 22 22 22 22 22
pi70 2 4 4 4 4 4 9 11 11 11 11 11 15 17 17 17 17 17 20 22 22 22 22 22
pi95 2 4 4 4 4 4 9 11 11 11 11 11 15 17 17 17 17 17 20 22 22 22 22 22
mob99 2 4 4 4 4 4 9 11 11 11 11 11 15 17 17 17 17 17 20 22 22 22 22 22
DVB-T fix95 2 4 4 4 4 4 9 11 11 11 11 11 15 17 17 17 17 17 20 22 22 22 22 22
64QAM po70 2 4 4 4 4 4 9 11 11 11 11 11 15 17 17 17 17 17 20 22 22 22 22 22
po95 2 4 4 4 4 4 9 11 11 11 11 11 15 17 17 17 17 17 20 22 22 22 22 22
pi70 2 4 4 4 4 4 9 11 11 11 11 11 15 17 17 17 17 17 20 22 22 22 22 22
pi95 2 4 4 4 4 4 9 11 11 11 11 11 15 17 17 17 17 17 20 22 22 22 22 22
mob99 2 4 4 4 4 4 9 11 11 11 11 11 15 17 17 17 17 17 20 22 22 22 22 22
Different characteristics: max. interfering field strength (3)
Combined location correction factor Source: Doc. 6-8/133, 'Digital broadcasting in Band III'; BPN 043 issue 2; EBU, May 2003.
fix - fixed, po - portable outdoor, pi - portable indoor, mob - mobile; the numbers 70, 95 and 99 indicate the location probability
Wanted signalDVB-T
T-DAB QPSK 16QAM 64QAMInterfering signal fix95 po70 po95 pi70 pi95 mob99 fix95 po70 po95 pi70 pi95 mob99 fix95 po70 po95 pi70 pi95 mob99 fix95 po70 po95 pi70 pi95 mob99
T-DAB fix95 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18
po70 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18
po95 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18
pi70 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18
pi95 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18
mob99 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18
DVB-T fix95 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18
QPSK po70 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18
po95 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18
pi70 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18
pi95 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18
mob99 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18
DVB-T fix95 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18
16QAM po70 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18
po95 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18
pi70 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18
pi95 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18
mob99 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18
DVB-T fix95 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18
64QAM po70 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18
po95 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18
pi70 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18
pi95 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18
mob99 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18 13 4 13 5 14 18
What is so special about Band III ?
Different characteristics: max. interfering field strength Maximum permissible interfering field strength (= minimum median equivalent field strength – Protection Ratio – combined location correction factor) fix – fixed, po – portable outdoor, pi – portable indoor, mob – mobile; the numbers 70, 95 and 99 indicate the location probability
Wanted signal
fix95 po70 po95 pi70 pi95 mob99 Interfering signal T-DAB DVB-T T-DAB DVB-T T-DAB DVB-T T-DAB DVB-T T-DAB DVB-T T-DAB DVB-T T-DAB 14 9 34 29 31 26 41 36 38 33 30 25 DVB-T 20 15 40 35 37 32 47 42 44 39 36 31
The values in this Table are given for the co-channel situation, and are based on the 7 MHz DVB-T system. For DVB-T interfered with by T-DAB, the worst case is taken: four T-DAB blocks of equal power interfering at the same time with one DVB-T channel. The values in this Table are derived from Chapter 5 and rounded to integers.
Sharing scenarios for sound and television
1) single service• very easy planning, rigid, not satisfactory
2) partitioning of the band• complicated, restricted flexibility, more efficient
3) mixed digital sound and television• complex, most flexible, most efficient overall
Open (technical) issues
• Re-channeling ??+ simpler, looks more efficient
- cost sometimes spectrum, many times money, complex introduction
• Propagation model ??– Rec. 1546 and/or 370 based methods, incl. GE89
• 1546 stability after May 2004 ?• continuity of existing rights• only 1 model in a frequency band for all services, but
may be different for different parts of the planning area
Future of Band III
“Prediction is difficult, especially about the future (of Band III)”
Therefore, lets try to build flexibility into the planning,
even for system changes afterwards.
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