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针对传统自适应波束形成器在相干干扰位置出现快速变化时,输出性能下降,甚至干扰抑制失效的问题,提出了一种相干信号自适应波束形成零陷展宽算法。首先,对接收数据协方差矩阵进行解相干处理得到Toeplitz矩阵;其次,对协方差矩阵进行重构和优化;最后,进行零陷展宽和对角加载处理。仿真结果表明:该算法不仅能对相干干扰自适应形成宽零陷,而且可以灵活地控制零陷的深度和宽度;与Mailloux算法相比,在输入信噪比较高的情况下,该算法能得到更低的波束旁瓣电平和更高的输出信干噪比
Aiming at the problem that the traditional adaptive beamforming (AMBF) adaptive beamforming device exhibits rapid changes in the position of the coherent interference, the output performance is degraded and even the interference suppression is ineffective, a coherent signal adaptive beamforming null spreading algorithm is proposed. Firstly, the covariance matrix of received data is subjected to the coherent processing to obtain the Toeplitz matrix. Secondly, the covariance matrix is reconstructed and optimized. Finally, the nudity width and diagonal loading are processed. Simulation results show that the proposed algorithm can not only form a wide zero-collapse adaptively for coherent interferences, but also can flexibly control the depth and width of nulling. Compared with Mailloux algorithm, Get a lower beam sidelobe level and higher output SINR