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Efficient detection algorithm for 2Nx2N MIMO systems using Alamouti code and QR decomposition

delete2006-12-01
delete15
PRE
AI
M
Maher Arar *
A
Abbas Yongaçoğlu
DOI：10.1109/LCOMM.2006.060953delete
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Abstract

Abstract

En 中文
We propose an efficient 2Nx2N MIMO detection algorithm where the transmit signals are grouped in pairs and separately coded using the standard Alamouti space-time code. At the receiver, one or more QR decompositions are performed and the upper triangular property of the R matrices so obtained is exploited in order to successively decode the transmitted symbols starting with those interference-free symbols corresponding to the last two rows and columns of R. Bit-error-rate simulation results, for a 4 x 4 MIMO system and a bandwidth efficiency of 8 bits/s/Hz, show that the proposed technique, while less complex than ordered MMSE V-BLAST, outperforms the latter by 2-6 dB at a BER of 10(-4).
Keywords:
Alamouti code
QR decomposition
V-BLAST
successive interference cancellation

Journal

IEEE Communications Letters cover
IEEE Communications Letters
IF:
4.4
Papers:
1.3W
Citations:
2.2W

Organization

No organization information available