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Joint error control and power allocation for video transmission over CDMA networks with multiuser detection

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3 Author(s)
Shengjie Zhao ; Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA ; Zixiang Xiong ; Xiaodong Wang

Error control and power allocation for transmitting wireless video over CDMA networks are considered in conjunction with multiuser detection. We map a layered video bitstream to several CDMA fading channels and inject multiple source/parity layers into each of these channels at the transmitter. At the receiver, we employ a linear minimum mean-square error (MMSE) multiuser detector in the uplink and two types of blind linear MMSE detectors in the downlink, for demodulating the received data. For given constraints on the available bandwidth and transmit power, the transmitter determines the optimal power allocation among different CDMA fading channels and the optimal number of source and parity packets to send that offer the best video quality. Simulation results show a performance gain of up to 1.5 dB with joint optimization over that with rate optimization only.

Published in:

Communications, 2002. ICC 2002. IEEE International Conference on  (Volume:5 )

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