一种基于天线阵列的判决反馈最小二乘盲多用户检测算法

Decision-feedback based least square blind multiuser detection algorithm via antenna arrays

提出了一种基于天线阵列的判决反馈最小二乘恒模盲多用户检测算法,称为DFB-LSCMA算法。首先用天线阵列中每根天线的均衡输出与期望用户波达方向(DOA)的共轭进行相关形成判决量,然后用检测器的输出与此判决分量的误差信息去调节多用户检测器的抽头系数。仿真结果表明,DFB-LSCMA算法比传统的LSCMA算法性能要好,特别在低信噪比下性能仍优于LSCMA。

A decision-feedback based least squares constant modulus blind multiuser detection algorithm (DFB-LSCMA) using antenna arrays is proposed in this paper. It uses the equalization output of every antenna in the antenna array to correlate with the conjugation of the DOA of the expected user to form the decision, then use the error between the decision and the output of the detector to alternate the coefficients of the multiuser detector. Simulation results show that the proposed DFB-LSCMA algorithm is superior to conventional LSCMA, especially with low SNR.