Simplified Maximum-Likelihood Detection for a Coded DSTTD-OFDM System

Hyounkuk KIM  Hyuncheol PARK  

IEICE TRANSACTIONS on Communications   Vol.E91-B   No.3   pp.959-962
Publication Date: 2008/03/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e91-b.3.959
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
double space-time transmit diversity (DSTTD),  maximum-likelihood (ML) detection,  

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We present a low-complexity maximum likelihood (ML) detector for a coded double space-time transmit diversity-orthogonal frequency division multiplexing (DSTTD-OFDM) system. The proposed ML detector exploits properties of two permuted equivalent channel matrices and multiple decision-feedback (DF) detections. This can reduce computational efforts from O(|A|4) to O(2|A|2) with maintaining ML performance, where |A| is the modulation order. Numerical results shows that the proposed ML detector obtains ML performance and requires remarkably lower computational loads compared with the conventional ML detector.