MLSE receiver with recursive interference cancellation for EDGE STTD systems in frequency-selective channels

Transmit diversity techniques use multiple transmit antennas to enhance the spectral efficiency and data rate. Space time transmit diversity (STTD) combats the fading effects in frequency-non-selective channel efficiently. However, the interference enhanced by multi-antenna transmission and multipath environments will severely worsen the system performance and ruin the transmit diversity due to the symbol delays of EDGE systems in frequency-selective channels. In this paper a novel maximum likelihood sequence estimation (MLSE) receiver with recursive interference cancellation (IC) is proposed for EDGE STTD systems in practical environments. The proposed recursive ICMLSE receiver suppress the enhanced co-antenna and co-channel interference, restores the transmit diversity and multipath diversity, and significantly improve the system performance.