Joint detection for space-time block-coded TD-CDMA systems

Abstract

Space-time (ST) coding offers an effective transmit diversity technique to combat fading, but most existing space-time coding schemes assume flat fading channels that may not he valid for wideband wireless mobile communications. For multiuser transmissions over multipath environment (frequencyselective fading channel), ST coding is challenging due to the presence of not only MA1 (multiple access interference) but also IS1 (intersymbol interference) .In this paper, a novel ST block coding scheme based on block processing is proposed for TD-CDMA systems in frequency-selective channels, and block linear joint detection algorithms are developed. Then, we simplify these algorithms and get a low cost hut good performance joint detection algorithm for spacetime block-coded TD-CDMA systems.