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 HaiRadiocommunication Bureau

RRC Workshop for CEE, CIS and Baltic States, Moscow, 21-24 Sept 2004

Technical parameters and propagation model

Outline

Strategic considerationsPlanning considerationsPlanning criteriaPropagation model

RRC Workshop for CEE, CIS and Baltic States, Moscow, 21-24 Sept 2004

Technical parameters and propagation model

Important strategic decisions

What sort of communication models?

PoliticalEconomicTechnical- convergence

RRC Workshop for CEE, CIS and Baltic States, Moscow, 21-24 Sept 2004

Technical parameters and propagation model

Planning considerations

Producing a digital planComplex, multi-dimensional projectMany technical inputs• Minimum signal levels• Protection ratios• Type of reception, etc….

No single and universal solution

RRC Workshop for CEE, CIS and Baltic States, Moscow, 21-24 Sept 2004

Technical parameters and propagation model

In developing the digital plan

Use representative criteria and parametersEnsure flexibility for future demands

Conversion between reception modes• Fixed to portable and mobile reception

Network configuration• Evolution from MFN to SFN

RRC Workshop for CEE, CIS and Baltic States, Moscow, 21-24 Sept 2004

Technical parameters and propagation model

Planning considerations

Frequency bandsReception modesSystem variantsNetwork structureCoverage quality

RRC Workshop for CEE, CIS and Baltic States, Moscow, 21-24 Sept 2004

Technical parameters and propagation model

Frequency bands?

174-230 MHzDVB-T and T-DABNo rigid splitting except on national basisMixed TV channel spacingNon-aligned TV channels

470-862 MHzDVB-T at 8 MHZ channel spacing

RRC Workshop for CEE, CIS and Baltic States, Moscow, 21-24 Sept 2004

Technical parameters and propagation model

Which reception mode?

DVB-TFixedPortable outdoor and indoorMobile

T-DABMobile Portable indoor

RRC Workshop for CEE, CIS and Baltic States, Moscow, 21-24 Sept 2004

Technical parameters and propagation model

DVB-T system variants?

2k or 8k OFDMSystem variants

Hierarchical or non-hierarchical ModulationQPSK, 16QAM or 64 QAMCode rateBit rate

120 DVB-T system variants

RRC Workshop for CEE, CIS and Baltic States, Moscow, 21-24 Sept 2004

Technical parameters and propagation model

Network structure?

MFNSFNDense SFN

RRC Workshop for CEE, CIS and Baltic States, Moscow, 21-24 Sept 2004

Technical parameters and propagation model

Coverage quality?

In terms of percentage of location70%95%99%

RRC Workshop for CEE, CIS and Baltic States, Moscow, 21-24 Sept 2004

Technical parameters and propagation model

Planning criteria

Minimum median field strength50% of locations, 50% of time and 10 m a.g.l Calculated from• C/N• Receiving conditions• Location correction factors

Protection ratios

RRC Workshop for CEE, CIS and Baltic States, Moscow, 21-24 Sept 2004

Technical parameters and propagation model

C/N and Data rate vs code rate (source EBU)

RRC Workshop for CEE, CIS and Baltic States, Moscow, 21-24 Sept 2004

Technical parameters and propagation model

C/N and Data rate vs guard interval (source EBU)

RRC Workshop for CEE, CIS and Baltic States, Moscow, 21-24 Sept 2004

Technical parameters and propagation model

Fixed reception

Radiation pattern of receiving antenna

ITU-R BT.419

Receiving antenna gain7/10/12 dB for 200/500/800 MHz

Feeder loss2/3/5 dB for 200/500/800 MHz

Location probability – 95%Polarization discrimination - Yes

RRC Workshop for CEE, CIS and Baltic States, Moscow, 21-24 Sept 2004

Technical parameters and propagation model

Portable reception

Antenna pattern: omnidirectionalAntenna gain: -2.2/0 dB for VHF/UHFFeeder loss: 0 dBHeight loss at 1.5 m

12/16/18 dB for 200/500/800 MHz

Building penetration loss9/8 dB for VHF/UHF

RRC Workshop for CEE, CIS and Baltic States, Moscow, 21-24 Sept 2004

Technical parameters and propagation model

Portable reception (2)

Location probabilityDVB-T: 70% to 95%T-DAB: 95% (indoor)

Polarization discriminationNot taken into account

RRC Workshop for CEE, CIS and Baltic States, Moscow, 21-24 Sept 2004

Technical parameters and propagation model

Mobile reception

Antenna pattern: omnidirectionalAntenna gain: -2.2/0 dB for VHF/UHFFeeder loss: 0dBHeight loss at 1.5 m

12/16/18 dB for 200/500/800 MHz

Location probability: 99%Polarization discrimination: No

RRC Workshop for CEE, CIS and Baltic States, Moscow, 21-24 Sept 2004

Technical parameters and propagation model

Calculate minimum median field strengthMinimum C/NReceiver noise input power (receiver noise figure and noise bandwidth)Effective antenna aperture (antenna gain)Feeder loss

Minimum field strengthMan-made noiseHeight lossBuilding penetration lossLocation correction factor

Minimum median field strength

RRC Workshop for CEE, CIS and Baltic States, Moscow, 21-24 Sept 2004

Technical parameters and propagation model

Minimum median field strength – DVB-T

How to calculate?

RRC Workshop for CEE, CIS and Baltic States, Moscow, 21-24 Sept 2004

Technical parameters and propagation model

Emed for DVB-T Reference Planning configurations RPC RPC1 RPC2 RPC3

Location probability

95% 95% 95%Reference C/N 21 19 17Reference Emed (200 MHz)

50 67 76

Reference Emed (650 MHz)

56 78 88

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

RRC Workshop for CEE, CIS and Baltic States, Moscow, 21-24 Sept 2004

Technical parameters and propagation model

Emed for T-DAB Reference planning configurations

RPC RPC4 RPC5

Location probability

99% 95%

Reference C/N 15 15

Reference Emed dBuV/m (200 MHz)

60 66

RPC4: RPC for mobile reception

RPC5: RPC for portable indoor reception

RRC Workshop for CEE, CIS and Baltic States, Moscow, 21-24 Sept 2004

Technical parameters and propagation model

Protection ratios

DVB-T

T-DAB

Analogue TV

DVB-T

T-DAB

Analogue TV

Wanted UnwantedITU-R BT. 1368

15 dBITU-R BS. 1660

ITU-R BS. 1660

ITU-R T. 655

ITU-R BT. 1368

RRC Workshop for CEE, CIS and Baltic States, Moscow, 21-24 Sept 2004

Technical parameters and propagation model

Propagation model

ITU-R P.1546-1 modified9 geographical zonesMeasurement resultsTheoretical considerations

No terrain height database usedFree space prediction used in for airborne stations

RRC Workshop for CEE, CIS and Baltic States, Moscow, 21-24 Sept 2004

Technical parameters and propagation model