DocumentCode :
2482312
Title :
Decoding of quasiorthogonal space-time block code with noise whitening
Author :
Yuen, Chau ; Guan, Yong Liang ; Tjhung, Tjeng Thiang
Author_Institution :
Nanyang Technol. Univ., Singapore
Volume :
3
fYear :
2003
fDate :
7-10 Sept. 2003
Firstpage :
2166
Abstract :
Quasiorthogonal space-time block code (QO-STBC) can provide full-rate transmission and low decoding complexity. Full-level of transmit diversity can be achieved if constellation rotation technique has been used. In this paper, the design and application of noise whitening filter for the receiver of QO-STBC are discussed in detail. Such filter facilitates the use of standard equalizer or decoder that have been designed for white noise on the received QO-STBC signals, which tend to suffer from colored noise after matched filtering. This eliminates the need for dedicated decoding metric for signals with colored noise. It is found that only maximum likelihood decoding and sphere decoding can take advantage of the constellation rotation code design technique to achieve full diversity. Analytical results show that the SNR of the estimated symbol is independent to the angle of constellation rotation if symbol-by-symbol decoding schemes are used. This confirms with the simulation results where the performance of linear equalizers and decision feedback equalizers are the same for both constellation rotated and nonconstellation rotated QO-STBC.
Keywords :
block codes; decision feedback equalisers; diversity reception; error statistics; matched filters; maximum likelihood decoding; receivers; space-time codes; transmitting antennas; white noise; QO-STBC; colored noise; constellation rotation technique; decision feedback equalizers; frame error rate; linear equalizers; matched filtering; maximum likelihood decoding; noise whitening filter; quasiorthogonal space-time block code; receiver; sphere decoding; symbol-by-symbol decoding schemes; transmit antenna; transmit diversity; Block codes; Colored noise; Equalizers; Filtering; Matched filters; Maximum likelihood decoding; Nonlinear filters; Receiving antennas; Space technology; Transmitting antennas;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2003. PIMRC 2003. 14th IEEE Proceedings on
Print_ISBN :
0-7803-7822-9
Type :
conf
DOI :
10.1109/PIMRC.2003.1259099
Filename :
1259099
Link To Document :
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