Joint resource allocation for MIMO OFDM video transmission systems with unequal error protection
ZHANG Chengwen, LIU Xin, TAN Xuezhi
Communication Research Center, Harbin Institute of Technology, Harbin 150080, China
Abstract:
To improve the performance of MIMO OFDM video transmission systems on the limitation of wireless bandwidth and transmitting power, we propose an adaptive joint resource allocation algorithm with unequal error protection (UEP) based on joint source channel coding (JSCC) according to H.264 video compression standard and RCPT channel coding. According to different thresholds of the average SNR of subchannels, the algorithm dynamically allocates the source coding parameters of original video data and the channel coding parameters of RCPT, which realizes UEP for the compressed video data of different importance. Through the bit and power allocation based on MQAM modulation and the subspace allocation based on beamforming technology for different subcarriers, an adaptive joint resource allocation making full use of space frequency domain resources have been realized. The simulation results indicate that the algorithm improves the adaptability of video transmission systems in different wireless environments and the quality of video retrieval.
Key words: video transmission MIMO OFDM unequal error protection joint source channel coding
DOI：10.11916/j.issn.1005-9113.2012.02.020
Clc Number:TN9112
Fund:
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Joint resource allocation for MIMOOFDM video transmission systemswith unequal error protection
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