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中文摘要：
本文提出了一种基于天线阵列的预处理判决反馈最小二乘恒模盲多用户检测算法，称为PDF-LSCMA算法．它是对天线阵列接收信号经预处理，采用判决反馈最小二乘恒模算法进行多用户检测，确保了算法收敛于期望信号．文中就预处理中所用到的波达方向估计误差对PDF-LSCMA算法的影响进行了理论分析，给出了波达方向估计的取值范围，并用计算机仿真对这种算法及分析结果进行了验证．
英文摘要：
A Pre-processing Least Squares Constant Modulus blind multiuser detection Algorithm based on Decision-Feedback （PDF-LSCMA） in antenna array system is proposed in this paper.It pre-processes the received signals fi-om the antenna array and utilizes the least squares constant modulus algorithm based on decision feedback to detect the DS-CDMA signals. This algorithm can ensure the convergence to the expected signal and enhance the performance of the system. The robustness of PDF-LSCMA to the DOA estimation error and the maximum value of DOA estimation error are also analyzed in this paper. Simulation validates the algorithm and theoretical analysis.
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