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

Liu, Yan; Wang, Xiaodong

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.

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Also Published In

Title
EURASIP Journal on Advances in Signal Processing
DOI
https://doi.org/10.1155/S1110865702000586

More About This Work

Academic Units
Electrical Engineering
Published Here
September 9, 2014

Notes

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