A SIMPLIFIED QRD-M SIGNAL DETECTION ALGORITHM FOR MIMO-OFDM SYSTEMS  

作　　者：Jian Haifang Yao Xiaocheng Shi Yin 

机构地区：[1]Institute of semiconductors Chinese Academy of Sciences, P. O. Box 912, Beijing 100083, China

出　　处：《Journal of Electronics(China)》2010年第1期88-93,共6页电子科学学刊（英文版）

基　　金：Supported by the ‘Transformation of Scientific and Technological Achievements Project’ funded by the Department of Science and Technology of Jiangsu province,P.R. China (BA2006076)

摘　　要：QR Decompositon with an M-algorithm(QRD-M) has good performance with low complexity,which is considered as a promising technique in Multiple-Input Multiple-Output(MIMO) detections.This paper presented a simplified QRD-M algorithm for MIMO Orthogonal Frequency Division Multiplexing(MIMO-OFDM) systems.In the proposed scheme,each surviving path is expanded only to partial branches in order to carry out a limited tree search.The nodes are expanded on demand and sorted in a distributed manner,based on the novel expansion scheme which can pre-determine the children's ascending order by their local distances.Consequently,the proposed scheme can significantly decrease the complexity compared with conventional QRD-M algorithm.Hence,it is especially attractive to VLSI implementation of the high-throughput MIMO-OFDM systems.Simulation results prove that the proposed scheme can achieve a performance very close to the conventional QRD-M algorithm.QR Decompositon with an M-algorithm （QRD-M） has good performance with low complexity, which is considered as a promising technique in Multiple-Input Multiple-Output （MIMO） detections. This paper presented a simplified QRD-M algorithm for MIMO Orthogonal Frequency Division Multiplexing （MIMO-OFDM） systems. In the proposed scheme, each surviving path is expanded only to partial branches in order to carry out a limited tree search. The nodes are expanded on demand and sorted in a distributed manner, based on the novel expansion scheme which can pre-determine the children＇s ascending order by their local distances. Consequently, the proposed scheme can significantly decrease the complexity compared with conventional QRD-M algorithm. Hence, it is especially attractive to VLSI implementation of the high-throughput MIMO-OFDM systems. Simulation results prove that the proposed scheme can achieve a performance very close to the conventional QRD-M algorithm.

关 键 词：Multiple-Input Multiple-Output(MIMO) Orthogonal Frequency Division Multiplexing(OFDM) QR Decompositon with an M-algorithm(QRD-M) Detection 

分 类 号：TN47[电子电信—微电子学与固体电子学]