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

• Main Authors: Wang Xiaodong, Liu Yan
• Format: Article
• Language: English
• Published: SpringerOpen 2002-01-01
• Series: EURASIP Journal on Advances in Signal Processing
• Subjects: space-time differential block code (STDC); flat-fading; multiple-symbol detection; decision-feedback; OFDM
• Online Access: http://dx.doi.org/10.1155/S1110865702000586

<p/> <p>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.</p>