共轭虚拟阵列波束形成方法

Conjugate Virtual Array Beamforming Method

根据MASK、BPSK和AM等非圆信号的实值特性,利用实际阵列接收信号的共轭将阵列向外扩展,提出一种适用于均匀线阵的共轭虚拟阵列波束形成方法,并对其自适应波束性能进行了分析和改进,在此基础上提出一种快速实现方法.该虚拟阵列的构造方式能同时保留时间信息和方位信息,用于自适应波束形成中,可以改善波束图形状,提高阵列增益,对抗超自由度干扰.计算机仿真验证了该虚拟阵列波束形成方法的优越性.

Based on real-valued property of the non-circular sources,a new virtual array beamforming method for the uniform linear array was proposed by extending the original array utilizing the conjugate data of the real array.By analyzing the performance of the method in adaptive beamforming,some improvements were made and a computation saving method was proposed.Preserving both the time and the direction information,the virtual array is very applicable for adaptive beamforming.It provides much better performance than the original array,such as better beam pattern,higher array gain and the abilities to restrain interferes more than the freedom degrees.Several computer simulations were provided for illustrating the advantages of the proposed method.