基于QR分解V_BLAST检测算法研究和比较_孙艳华.pdf

信号与信息处理 QR V- BLAST 孙艳华, 吴伟陵 ( 北京邮电大学, 北京100876) , , D.Wubben Gram- Schmidt QR , 2 QR , Gram- Schmidt QR V- BLAS , , , ; MIMO; ; QR N929.5 A The Development and Comparison of V- BLAST Detection Algorithms Based on QR Decomposition SUN Yan-hua, WU We-i ling ( Beij ing Univ ersity of P osts and Telecommunications , Beij ing 100876, China) A stract 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. he 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. hey avoid matrix inversion operation,reduce complexity and have little performance loss compared with V- BLAS interference cancellation algorithm. Key words layered space-time code;MIMO detection algorithm; QR decomposition (N E M ) 1 0 M , M , : , M , 2, MIMO , S = [ S , S , ,, S , r = [ r , r , ,, , (MIMO) 1 2 M 1 2 [ 1] rN , : , r = H s + n ( 1) , , Bell V- BLAS [ 2] , , 1 V- BLAST , H , , [ 3]