Paper Info
Title
Iterative Biased Mmse Detections For Dsttd-Ofdm Systems Over Time-Varying Multipath Channels
Abstract
n this paper, we propose iterative biased minimum-mean-squared-error (BMMSE) detection schemes for. double space-time transmit diversity (DSTTD)-orthogonal frequency division multiplexing (OFDM) systems over time-varying multipath channels. The time-varying effects cause intercarrier interference (ICI) and destroy the orthogonality of each STTD unit, considerably degrading system performance. To mitigate these impairments, we first estimate all transmitted symbols temporarily using sorted-QR-decomposition (SQRD)-based decision-feedback detection (DFD) considering the partial ICIs. Next, the significantly dominant ICI terms are eliminated with the help of the estimated symbols in the previous step. Finally, the SQRD-based DFD with the only desired subcarriers is performed. In each detection steps, we employ a biased MMSE criterion, which considers ICIs as well as noise. Numerical results demonstrate that the system performance of the proposed algorithms is greatly enhanced in comparison to the conventional schemes.
Year
DOI
Venue
2007
10.1109/VETECS.2007.409
2007 IEEE 65TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-6
Keywords
Field
DocType
ofdm modulation,minimum mean square error,fading,ofdm,wireless communication,interference,orthogonal frequency division multiplexing,signal detection,iterative methods,qr decomposition,mimo,system performance,signal to noise ratio
Detection theory,Iterative method,Computer science,Fading,Signal-to-noise ratio,Frequency-division multiplexing,MIMO,Electronic engineering,Orthogonal frequency-division multiplexing,Transmit diversity
Conference
ISSN
Citations 
PageRank 
1550-2252
1
0.37
References 
Authors
6
4
Name
Order
Citations
PageRank
Wooram Shin1142.95
Hoojin Lee25818.62
Changwoo Seo31611.84
Joonhyuk Kang440764.13