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Regional Workshop on planning of digital terrestrial broadcasting in relation to RRC-06 for CEE, CIS and Baltic States (Moscow, 21 –24 September 2004)

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Presentation on theme: "Regional Workshop on planning of digital terrestrial broadcasting in relation to RRC-06 for CEE, CIS and Baltic States (Moscow, 21 –24 September 2004)"— Presentation transcript:

1 Regional Workshop on planning of digital terrestrial broadcasting in relation to RRC-06 for CEE, CIS and Baltic States (Moscow, 21 –24 September 2004) Technical parameters and propagation model for planning Pham Nhu Hai Radiocommunication Bureau

2 Technical parameters and propagation model RRC Workshop for CEE, CIS and Baltic States, Moscow, Sept 2004 Outline Strategic considerations Planning considerations Planning criteria Propagation model

3 Technical parameters and propagation model RRC Workshop for CEE, CIS and Baltic States, Moscow, Sept 2004 Important strategic decisions What sort of communication models? Political Economic Technical- convergence

4 Technical parameters and propagation model RRC Workshop for CEE, CIS and Baltic States, Moscow, Sept 2004 Planning considerations Producing a digital plan Complex, multi-dimensional project Many technical inputs Minimum signal levels Protection ratios Type of reception, etc …. No single and universal solution

5 Technical parameters and propagation model RRC Workshop for CEE, CIS and Baltic States, Moscow, Sept 2004 In developing the digital plan Use representative criteria and parameters Ensure flexibility for future demands Conversion between reception modes Fixed to portable and mobile reception Network configuration Evolution from MFN to SFN

6 Technical parameters and propagation model RRC Workshop for CEE, CIS and Baltic States, Moscow, Sept 2004 Planning considerations Frequency bands Reception modes System variants Network structure Coverage quality

7 Technical parameters and propagation model RRC Workshop for CEE, CIS and Baltic States, Moscow, Sept 2004 Frequency bands? MHz DVB-T and T-DAB No rigid splitting except on national basis Mixed TV channel spacing Non-aligned TV channels MHz DVB-T at 8 MHZ channel spacing

8 Technical parameters and propagation model RRC Workshop for CEE, CIS and Baltic States, Moscow, Sept 2004 Which reception mode? DVB-T Fixed Portable outdoor and indoor Mobile T-DAB Mobile Portable indoor

9 Technical parameters and propagation model RRC Workshop for CEE, CIS and Baltic States, Moscow, Sept 2004 DVB-T system variants? 2k or 8k OFDM System variants Hierarchical or non-hierarchical Modulation QPSK, 16QAM or 64 QAM Code rate Bit rate 120 DVB-T system variants

10 Technical parameters and propagation model RRC Workshop for CEE, CIS and Baltic States, Moscow, Sept 2004 Network structure? MFN SFN Dense SFN

11 Technical parameters and propagation model RRC Workshop for CEE, CIS and Baltic States, Moscow, Sept 2004 Coverage quality? In terms of percentage of location 70% 95% 99%

12 Technical parameters and propagation model RRC Workshop for CEE, CIS and Baltic States, Moscow, Sept 2004 Planning criteria Minimum median field strength 50% of locations, 50% of time and 10 m a.g.l Calculated from C/N Receiving conditions Location correction factors Protection ratios

13 Technical parameters and propagation model RRC Workshop for CEE, CIS and Baltic States, Moscow, Sept 2004 C/N and Data rate vs code rate (source EBU)

14 Technical parameters and propagation model RRC Workshop for CEE, CIS and Baltic States, Moscow, Sept 2004 C/N and Data rate vs guard interval (source EBU)

15 Technical parameters and propagation model RRC Workshop for CEE, CIS and Baltic States, Moscow, Sept 2004 Fixed reception Radiation pattern of receiving antenna ITU-R BT.419 Receiving antenna gain 7/10/12 dB for 200/500/800 MHz Feeder loss 2/3/5 dB for 200/500/800 MHz Location probability – 95% Polarization discrimination - Yes

16 Technical parameters and propagation model RRC Workshop for CEE, CIS and Baltic States, Moscow, Sept 2004 Portable reception Antenna pattern: omnidirectional Antenna gain: -2.2/0 dB for VHF/UHF Feeder loss: 0 dB Height loss at 1.5 m 12/16/18 dB for 200/500/800 MHz Building penetration loss 9/8 dB for VHF/UHF

17 Technical parameters and propagation model RRC Workshop for CEE, CIS and Baltic States, Moscow, Sept 2004 Portable reception (2) Location probability DVB-T: 70% to 95% T-DAB: 95% (indoor) Polarization discrimination Not taken into account

18 Technical parameters and propagation model RRC Workshop for CEE, CIS and Baltic States, Moscow, Sept 2004 Mobile reception Antenna pattern: omnidirectional Antenna gain: -2.2/0 dB for VHF/UHF Feeder loss: 0dB Height loss at 1.5 m 12/16/18 dB for 200/500/800 MHz Location probability: 99% Polarization discrimination: No

19 Technical parameters and propagation model RRC Workshop for CEE, CIS and Baltic States, Moscow, Sept 2004 Calculate minimum median field strength Minimum C/N Receiver noise input power (receiver noise figure and noise bandwidth) Effective antenna aperture (antenna gain) Feeder loss Minimum field strength Man-made noise Height loss Building penetration loss Location correction factor Minimum median field strength

20 Technical parameters and propagation model RRC Workshop for CEE, CIS and Baltic States, Moscow, Sept 2004 Minimum median field strength – DVB-T How to calculateHow to calculate?

21 Technical parameters and propagation model RRC Workshop for CEE, CIS and Baltic States, Moscow, Sept 2004 Emed for DVB-T Reference Planning configurations RPCRPC1RPC2RPC3 Location probability 95% Reference C/N Reference Emed (200 MHz) Reference Emed (650 MHz) RPC1: RPC for fixed roof reception RPC2: RPC for portable outdoor or low coverage quality portable indoor or mobile reception RPC3: RPC for higher coverage quality for portable indoor recption

22 Technical parameters and propagation model RRC Workshop for CEE, CIS and Baltic States, Moscow, Sept 2004 Emed for T-DAB Reference planning configurations RPCRPC4RPC5 Location probability 99%95% Reference C/N 15 Reference Emed dBuV/m (200 MHz) 6066 RPC4: RPC for mobile reception RPC5: RPC for portable indoor reception

23 Technical parameters and propagation model RRC Workshop for CEE, CIS and Baltic States, Moscow, Sept 2004 Protection ratios DVB-T T-DAB Analogue TV DVB-T T-DAB Analogue TV Wanted Unwanted ITU-R BT dB ITU-R BS ITU-R T. 655 ITU-R BT. 1368

24 Technical parameters and propagation model RRC Workshop for CEE, CIS and Baltic States, Moscow, Sept 2004 Propagation model ITU-R P modified 9 geographical zones Measurement results Theoretical considerations No terrain height database used Free space prediction used in for airborne stations

25 Technical parameters and propagation model RRC Workshop for CEE, CIS and Baltic States, Moscow, Sept 2004


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