Title :
Efficient video transmission over correlated Nakagami fading channels for IS-95 CDMA systems
Author :
Chan, Norman H L ; Mathiopoulos, P. Takis
Author_Institution :
Dept. of Electr. & Comput. Eng., British Columbia Univ., Vancouver, BC, Canada
Abstract :
This paper deals with the problem of efficient transmission of video signals over generalized fading channels using direct sequence-spread spectrum (DS-SS) systems. We first propose a modified version of the H.263 video codec which results in improvement of average video and frame performance. Using a coherent DS-CDMA system based upon the IS-95 standard, we investigate the performance of the proposed video codec over frequency-selective, correlated Nakagami fading forward-link channels employing a RAKE receiver. A variety of performance evaluation results, both in single-cell and multiple-cell environments, are presented for different number of resolving paths and signal propagation characteristics, as well as for the presence of channel estimation errors
Keywords :
cellular radio; code division multiple access; fading channels; spread spectrum communication; telecommunication standards; video codecs; visual communication; DS-SS; H.263 video codec; IS-95 CDMA systems; IS-95 standard; RAKE receiver; channel estimation errors; correlated Nakagami fading channels; direct sequence-spread spectrum; efficient video transmission; frame performance; frequency-selective correlated Nakagami fading forward-link channel; generalized fading channel; multiple-cell environments; performance; resolving paths; signal propagation characteristics; single-cell environments; video performance; video signals; Code standards; Concatenated codes; Convolutional codes; Fading; Forward error correction; Multiaccess communication; Rician channels; Video codecs; Video compression; Wireless networks;
Conference_Titel :
Vehicular Technology Conference, 1999 IEEE 49th
Conference_Location :
Houston, TX
Print_ISBN :
0-7803-5565-2
DOI :
10.1109/VETEC.1999.778091
