Efficient video transmission over correlated Nakagami fading channels for IS-95 CDMA systems

TitleEfficient video transmission over correlated Nakagami fading channels for IS-95 CDMA systems
Publication TypeConference Paper
Year of Publication1999
AuthorsChan, N. H. L., and P. T. Mathiopoulos
Conference NameVehicular Technology Conference, 1999 IEEE 49th
Pagination427 -432 vol.1
Date Publishedjul.
Keywordscellular radio, channel estimation errors, code division multiple access, correlated Nakagami fading channels, direct sequence-spread spectrum, DS-SS, efficient video transmission, fading channels, frame performance, frequency-selective correlated Nakagami fading forward-link channel, generalized fading channel, H.263 video codec, IS-95 CDMA systems, IS-95 standard, multiple-cell environments, performance, RAKE receiver, resolving paths, signal propagation characteristics, single-cell environments, spread spectrum communication, telecommunication standards, video codecs, video performance, video signals, visual communication

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


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