高阶累积量波束形成在DS-CDMA系统中的应用

在研究高阶累积量波束形成算法的基础上，根据多天线直序扩频码分多址系统在同信道移动用户数目较大或处理增益较高的情况下，阵列解扩器输出的多址干扰向量呈现高斯随机分布的特点，提出了一种新的利用高阶累积量进行自适应盲波束形成的方法．该方法充分利用了接收信号的高阶统计特性，降低了运算复杂度，收敛快，能够有效地跟踪期望用户信号，具有无需训练序列、参考信号以及阵列结构先验知识的优点．计算机仿真结果表明该方法的有效性．

Application of Higher Order Cumulant-Based Beamforming Method in DS-CDMA System

On the basis of the higher order cumulant-based beamforming algorithm, given that the interference signal vectors demonstrate the characteristic of Gaussian random distribution after code filtering under the condition of large user number and high processing gain, a blind method to estimate the beamforming weight vector of the desired user by computing the higher order cumulant was proposed. The simulation result shows that the method has higher estimation accuracy, lower complexity and can track the desired signal effectively.