Open Access

Multiple-Symbol Decision-Feedback Space-Time Differential Decoding in Fading Channels

EURASIP Journal on Advances in Signal Processing20022002:612697

https://doi.org/10.1155/S1110865702000586

Received: 20 May 2001

Published: 18 March 2002

Abstract

Space-time differential coding (STDC) is an effective technique for exploiting transmitter diversity while it does not require the channel state information at the receiver. However, like conventional differential modulation schemes, it exhibits an error floor in fading channels. In this paper, we develop an STDC decoding technique based on multiple-symbol detection and decision-feedback, which makes use of the second-order statistic of the fading processes and has a very low computational complexity. This decoding method can significantly lower the error floor of the conventional STDC decoding algorithm, especially in fast fading channels. The application of the proposed multiple-symbol decision-feedback STDC decoding technique in orthogonal frequency-division multiplexing (OFDM) system is also discussed.

Keywords

space-time differential block code (STDC) flat-fading multiple-symbol detection decision-feedback OFDM

Authors’ Affiliations

(1)
Schlumberger Austin Technology Center
(2)
Department of Electrical Engineering, Columbia University

Copyright

© Liu and Wang 2002