Multistage receiver for differential space-time block codes

TitleMultistage receiver for differential space-time block codes
Publication TypeConference Paper
Year of Publication2003
AuthorsTarasak, P., H. Minn, and V. K. Bhargava
Conference NameCommunications, 2003. ICC '03. IEEE International Conference on
Pagination3155 - 3159 vol.5
Date Publishedmay.
Keywordsapproximate maximum likelihood receiver, bit error rate performance, block codes, channel estimation, differential detection, differential space-time block codes, diversity reception, error floor, error statistics, fading channels, interference suppression, intrablock-interference cancellation, multistage decision-directed estimator, multistage receiver, quasistatic fading channel, radio receivers, space-time codes, spatial diversity

Tarokh's differential space-time block codes (DSTBC) can provide a full spatial diversity and be decoded without channel state information. The bit error rate performance of a conventional differential detection has 3-dB degradation compared to a coherent detection in a quasi-static fading channel. Differential detection experiences more degradation in a fast fading channel and error floor appears at high SNR. In [E. Chiavaccini and G.M. Vitetta, May 2002], an approximate maximum likelihood receiver was derived and it reduced the error floor significantly. In this paper, we modify the receiver in [E. Chiavaccini and G.M. Vitetta, May 2002] and apply the concept of multistage decision-directed estimator with intrablock-interference cancellation to obtain further improvement. The proposed receiver works efficiently at moderate to high SNR and at the fading rate between fdT = 0.02 and fdT = 0.07.


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