多径环境中多用户波束形成与DOA估计

该文讨论了多径环境中多用户的波束形成与DOA的估计问题，采用了解相关检测器来估计用户空间特征，提出了循环空间平滑算法（CSS）-基于空间平滑的保护阵列权值维数不变的多用户波束形成算法，其理论依据是采样信号协方差矩阵的逆矩阵循环传递等效于对其求均值，利用了估计出的用户空间特征构造协方差矩阵进行空间平滑的高分辨DOA估计，仿真结果说明了循环空间平滑算法应用于多用户波束形成具有更优的抗干扰性能。

Beamforming and DOA estimation for multiuser in multipath circumstance

In this paper beamforming and DOA estimation for multiuser are discussed in multipath circumstance. Decorrelating detector is adopted to detect multiuser. CSS(Cyclic Spatial Smoothing) algorithm is presented. The algorithm with spatial smoothing can keep array weight dimension unchanged. Its theoretical foundation is that cyclic propagation of the sampling signal covariance inverse matrix is equivalent to averaging of the covariance matrix. The estimated spatial signature is adopted to construct the covariance matrix for high resolution DOA estimation. The simulation results show that CSS has better performance for multiuser beamforming.