DocumentCode :
2127522
Title :
Adaptive sub-channel allocation based UEP for video transmission in space-time coded OFDM systems
Author :
Yang, Guang-Hua ; Shen, Dongxu ; Li, Victor O K
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ., China
Volume :
4
fYear :
2004
fDate :
5-8 Sept. 2004
Firstpage :
3054
Abstract :
In this work, we introduce the idea of adaptive sub-channel allocation based unequal error protection (ASCA-UEP) to a space-time block coded orthogonal frequency division multiplexing (STBC-OFDM) system. In such a system, UEP is realized by adaptively allocating and transmitting high-priority and low-priority video data over high-quality and low-quality sub-channels, respectively. Further, we propose two ASCA-UEP schemes in a time division duplex (TDD) system: a receiver-based scheme and a transmitter-based scheme. Analysis and simulation results demonstrate that ASCA-UEP greatly enhances the quality of video reception, and the transmitter-based scheme is more robust to uplink channel noise than the receiver-based scheme, and is thus preferred when the receiver is power-constrained and the transmitter has sufficient power.
Keywords :
OFDM modulation; block codes; channel allocation; noise; radio transmitters; space-time codes; telecommunication network reliability; time division multiplexing; video coding; visual communication; STBC-OFDM system; TDD system; adaptive subchannel allocation; orthogonal frequency division multiplexing system; receiver-based scheme; space-time coded OFDM system; time division duplex system; transmitter-based scheme; unequal error protection; uplink channel noise; video reception; video transmission; Analytical models; Discrete cosine transforms; Error correction codes; Forward error correction; Noise robustness; OFDM; Space missions; Transmitters; Video coding; Video compression;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2004. PIMRC 2004. 15th IEEE International Symposium on
Print_ISBN :
0-7803-8523-3
Type :
conf
DOI :
10.1109/PIMRC.2004.1368881
Filename :
1368881
Link To Document :
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