NOVEL DECODING OF SQUARE QAM MODULATED MIMO SYSTEMS BASED ON TURBO MULTIUSER DETECTION  

作　　者：Zheng Jianping Bai Baoming Wang Xinmei 

机构地区：[1]State Key Lab of Integrated Services Networks, Xidian Univ., Xi＇an 710071, China

出　　处：《Journal of Electronics(China)》2008年第2期174-178,共5页电子科学学刊（英文版）

基　　金：the National Natural Science Foundation of China (No. 60472098 and No. 60502046).

摘　　要：By introducing the bit-level multi-stream coded Layered Space-Time （LST） transmitter along with a novel iterative MultiStage Decoding （MSD） at the receiver, the paper shows how to achieve the near-capacity performance of the Multiple-Input Multiple-Output （MIMO） systems with square Quadrature Amplitude Modulation （QAM）. In the proposed iterative MSD scheme, the detection at each stage is equivalent to multiuser detection of synchronous Code Division Multiple Access （CDMA） multiuser systems with the aid of the binary representation of the transmitted symbols. Therefore, the optimal Soft-Input Soft-Output （SISO） multiuser detection and low-complexity SISO multiuser detection can be utilized herein. And the proposed scheme with low-complexity SISO multiuser detection has polynomial complexity in the number of transmit antennas M, the number of receive antennas N, and the number of bits per constellation point Me. Simulation results demonstrate that the proposed scheme has similar Bit Error Rate （BER） performance to that of the known Iterative Tree Search （ITS） detection.By introducing the bit-level multi-stream coded Layered Space-Time(LST) transmitter along with a novel iterative MultiStage Decoding(MSD) at the receiver,the paper shows how to achieve the near-capacity performance of the Multiple-Input Multiple-Output(MIMO) systems with square Quadrature Amplitude Modulation(QAM) . In the proposed iterative MSD scheme,the detection at each stage is equivalent to multiuser detection of synchronous Code Division Multiple Access(CDMA) multiuser systems with the aid of the binary representation of the transmitted symbols. Therefore,the optimal Soft-Input Soft-Output(SISO) multiuser detection and low-complexity SISO multiuser detection can be utilized herein. And the proposed scheme with low-complexity SISO multiuser detection has polynomial complexity in the number of transmit antennas M,the number of receive antennas N,and the number of bits per constellation point Mc. Simulation results demonstrate that the proposed scheme has similar Bit Error Rate(BER) performance to that of the known Iterative Tree Search(ITS) detection.

关 键 词：Multiple-Input Multiple-Output （MIMO） MultiStage Decoding （MSD） Iterative detection/decoding Multiuser detection Polynomial complexity 

分 类 号：TN911.22[电子电信—通信与信息系统]