Performance Improvement of Space-Time Block Codes in Time-Selective Fading Channels

Kyung Seung AHN  Heung Ki BAIK  

Publication
IEICE TRANSACTIONS on Communications   Vol.E87-B   No.2   pp.364-368
Publication Date: 2004/02/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technology
Keyword: 
channel tracking,  decision feedback detection,  space-time block codes,  time-selective fading channel,  

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Summary: 
This paper proposes a new decision feedback decoding scheme for Alamouti-based space-time block coding (STBC) transmission over time-selective fading channels. In wireless channels, time-selective fading effects arise mainly due to Doppler shift and carrier frequency offset. Modelling the time-selective fading channels as the first-order Gauss-Markov processes, we use recursive algorithms such as Kalman filtering, LMS and RLS algorithms for channel tracking. The proposed scheme consists of the symbol decoding stage and channel tracking algorithms. Computer simulations confirm that the proposed scheme shows the better performance and robustness to time-selectivity.