Improved approximate maximum-likelihood receiver for differential space-time block codes over Rayleigh-fading channels

TitleImproved approximate maximum-likelihood receiver for differential space-time block codes over Rayleigh-fading channels
Publication TypeJournal Article
Year of Publication2004
AuthorsTarasak, P., H. Minn, and V. K. Bhargava
JournalVehicular Technology, IEEE Transactions on
Volume53
Pagination461 - 468
Date Publishedmar.
ISSN0018-9545
Keywordsapproximate maximum likelihood receiver, binary phase shift keying, bit error probability, bit error rate, block codes, differential space-time block codes, error statistics, fading rate, intrablock interference, maximum likelihood estimation, multistage receiver, phase shift keying, radio receivers, radiofrequency interference, Rayleigh channels, Rayleigh fading channel, signal-to-noise ratio, space-time codes, Viterbi receiver
Abstract

In this paper, an approximate maximum-likelihood (ML) receiver for differential space-time block codes is investigated. The receiver is derived from the ML criterion and is shown to mitigate error floor occurring in a conventional differential receiver very well. Because the receiver employs knowledges of signal-to-noise ratio (SNR) and fading rate, we study mismatched cases when these parameters are not accurate. It is shown that the receiver is more sensitive to the mismatched parameters when the fading rate is high. Then, a union bound on the bit error probability is derived. The bounds show good agreement with the simulation results at high fading rate and at high SNR. Finally, a modified receiver, denoted as multistage receiver, is proposed to compensate the so-called intrablock interference caused by the time-varying characteristic of the channel within a transmission block. The multistage receiver offers further reduction of error floor of about half order of magnitude as compared with an approximate ML receiver.

URLhttp://dx.doi.org/10.1109/TVT.2004.823542
DOI10.1109/TVT.2004.823542

a place of mind, The University of British Columbia

Electrical and Computer Engineering
2332 Main Mall
Vancouver, BC Canada V6T 1Z4
Tel +1.604.822.2872
Fax +1.604.822.5949
Email:

Emergency Procedures | Accessibility | Contact UBC | © Copyright 2021 The University of British Columbia