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OFDM-Based Turbo-Coded Hierarchical and Non-Hierarchical Terrestrial Mobile Digital Video Broadcasting

OFDM-Based Turbo-Coded Hierarchical and Non-Hierarchical Terrestrial Mobile Digital Video Broadcasting
OFDM-Based Turbo-Coded Hierarchical and Non-Hierarchical Terrestrial Mobile Digital Video Broadcasting
The feasibility of terrestrial Digital Video Broadcast (DVB) to mobile receivers is studied and turbo coded performance enhancements are proposed. Initially, the MPEG-2 codec is subjected to a rigorous bit error sensitivity investigation, in order to assist in designing various error protection schemes for wireless DVB transmission. The turbo codec is shown to provide Signal-to-Noise Ratio (SNR) performance advantages in excess of 5–6 dB over conventional convolutional coding both in terms of bit error rate and video quality. Our experiments suggested that—despite our expectations—multi-class data partitioning did not result in error resilience improvements, since a high proportion of relatively sensitive video bits had to be relegated to the lower integrity subchannel, when invoking a powerful low-rate channel codec in the high-integrity protection class. Nonetheless, DVB transmission to mobile receivers is feasible, when using turbo-coded OFDM transceivers at realistic power-budget requirements under the investigated highly dispersive fading channel conditions. It is interesting to note furthermore that the 5–6 dB SNR improvement due to turbo coding allows us to invoke for example the double-throughput 16-level Quadrature Amplitude Modulation (16-QAM) mode instead of the standard convolutional-coded 4-QAM mode. This facilitates doubling the bit rate and hence improving the video quality. Index Terms—DVB, DVB-T, error sensitivity, hierarchical video transmission, mobile video broadcast, MPEG-2, OFDM, QAM, terrestrial video broadcast, wireless video broadcast.
1-22
Lee, C.S.
9eb28e26-721d-49c0-9d60-b11d716b6eed
Keller, T.
41cd2bbf-bf82-4aac-83e9-d585f67f9742
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Lee, C.S.
9eb28e26-721d-49c0-9d60-b11d716b6eed
Keller, T.
41cd2bbf-bf82-4aac-83e9-d585f67f9742
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1

Lee, C.S., Keller, T. and Hanzo, L. (2000) OFDM-Based Turbo-Coded Hierarchical and Non-Hierarchical Terrestrial Mobile Digital Video Broadcasting. IEEE Transactions on Broadcasting, 46 (1), 1-22. (doi:10.1109/11.845861).

Record type: Article

Abstract

The feasibility of terrestrial Digital Video Broadcast (DVB) to mobile receivers is studied and turbo coded performance enhancements are proposed. Initially, the MPEG-2 codec is subjected to a rigorous bit error sensitivity investigation, in order to assist in designing various error protection schemes for wireless DVB transmission. The turbo codec is shown to provide Signal-to-Noise Ratio (SNR) performance advantages in excess of 5–6 dB over conventional convolutional coding both in terms of bit error rate and video quality. Our experiments suggested that—despite our expectations—multi-class data partitioning did not result in error resilience improvements, since a high proportion of relatively sensitive video bits had to be relegated to the lower integrity subchannel, when invoking a powerful low-rate channel codec in the high-integrity protection class. Nonetheless, DVB transmission to mobile receivers is feasible, when using turbo-coded OFDM transceivers at realistic power-budget requirements under the investigated highly dispersive fading channel conditions. It is interesting to note furthermore that the 5–6 dB SNR improvement due to turbo coding allows us to invoke for example the double-throughput 16-level Quadrature Amplitude Modulation (16-QAM) mode instead of the standard convolutional-coded 4-QAM mode. This facilitates doubling the bit rate and hence improving the video quality. Index Terms—DVB, DVB-T, error sensitivity, hierarchical video transmission, mobile video broadcast, MPEG-2, OFDM, QAM, terrestrial video broadcast, wireless video broadcast.

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More information

Published date: March 2000
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 257044
URI: http://eprints.soton.ac.uk/id/eprint/257044
PURE UUID: 2e3d5efa-535e-4129-8ea4-0741b0a15e74
ORCID for L. Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 23 Jan 2004
Last modified: 10 Dec 2019 01:58

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