IEEE Transactions on Communications
An improved STTD detection algorithm over time-selective fading channels
ISCIT'09 Proceedings of the 9th international conference on Communications and information technologies
IEEE Communications Letters
Simplified signal detection for BLAST architecture with ML and DFE detectors
ICCS'06 Proceedings of the 6th international conference on Computational Science - Volume Part II
Performance Analysis of Alamouti Space-Time Block Code Over Time-Selective Fading Channels
Wireless Personal Communications: An International Journal
Hi-index | 0.01 |
We analyze the impact of a time-varying Rayleigh-fading channel on the performance of an Alamouti transmit-diversity scheme. We propose several optimal and suboptimal detection strategies for mitigating the effects of a time-varying channel, and derive expressions for their bit-error probability as a function of the channel correlation coefficient ρ. We find that the maximum-likelihood detector that optimally compensates for the time-varying channel is very tolerant to time-varying fading, attaining full diversity order even for the extreme case of ρ=0. In contrast, although lower in complexity, the suboptimal schemes suffer a diversity penalty and are thus suitable only for slowly fading channels.