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The Development and Comparison of V-BLA Detection Algorithms Based on QR Decomposition

SUN Yan-hua,WU Wei-ling (Beijing University of Posts and Telecommunications,Beijing 100876,China)  
Layered space-time codes is a kind of space time coding techniques that has practical decoding complexity.Although maximum likelihood detection is optimal in the sense of minimizing bit error rate,it is impractical due to high complexity.In this paper,two sorted QR decomposition detection algorithms based on householder transform and givens rotation transform are proposed.The results show that the proposed algorithms achieve the same performance as the sorted QR decomposition algorithm based on Gram-Schimidt transform proposed by D.Wubben. They avoid matrix inversion operation,reduce complexity and have little performance loss compared with V-BLA interference cancellation algorithm.
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