DocumentCode :
2974948
Title :
BER minimized power allocation for quasi-orthogonal space-time block coded signals with QR-based successive detection
Author :
Wu, Jwo-Yuh ; Fan, Sheng-Po ; Kuang, Jie-Gang ; Lee, Ta-Sung
Author_Institution :
Nat. Chiao Tung Univ., Hsinchu
fYear :
2007
fDate :
10-13 Dec. 2007
Firstpage :
1
Lastpage :
5
Abstract :
We propose a minimal BER power allocation scheme for a class of quasi-orthogonal space-time block coded transmission (the so-called ABBA system) over i.i.d. Rayleigh fading channels under the QR-based successive detection framework. Instead of relying on BER under a fixed channel realization, the design criterion we adopt is the overall mean BER averaged with respect to the channel distribution. By exploiting a distinctive channel matrix structure induced by the ABBA code we derive a closed-form upper bound of the considered BER metric and, through minimization of which, an optimal power allocation scheme is obtained. Numerical simulation shows that the resultant performance is almost identical to that of the joint maximum-likelihood decoding in the medium-to-high SNR regime.
Keywords :
Rayleigh channels; block codes; channel allocation; error statistics; maximum likelihood decoding; signal detection; space-time codes; ABBA code; BER minimized power allocation; BER power allocation scheme; QR-based successive detection; Rayleigh fading channels; channel distribution; channel matrix structure; fixed channel realization; maximum-likelihood decoding; quasi-orthogonal space-time block coded signals; Bit error rate; Block codes; Error analysis; Error probability; Fading; Maximum likelihood decoding; Maximum likelihood detection; Power engineering and energy; Transmitting antennas; Upper bound; QR decomposition; Quasi-orthogonal space-time block code; bit error rate; power allocation; successive detection;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Information, Communications & Signal Processing, 2007 6th International Conference on
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-0982-2
Electronic_ISBN :
978-1-4244-0983-9
Type :
conf
DOI :
10.1109/ICICS.2007.4449749
Filename :
4449749
Link To Document :
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