一种宽零陷的自适应波束形成算法  

An Adaptive Beamforming Algorithm with Wide Nulls

作　　者：阳凯 杨善国 

机构地区：[1]电子信息控制重点实验室,成都610036

出　　处：《电子信息对抗技术》2015年第2期57-61,共5页Electronic Information Warfare Technology

摘　　要：自适应波束形成技术能有效地接收目标信号并抑制干扰,是阵列信号处理中的一项关键技术。为了应对快速运动干扰或平台转动等引起的自适应权值和数据失配,增强算法的鲁棒性,可以采用零陷展宽技术。通过Capon谱重构干扰加噪声协方差矩阵,可以根据需要设置零陷宽度和零陷深度,从而大大地提高算法的鲁棒性。通过与现有算法的比较,该方法能得到更高的输出信干噪比,并且能加深零陷深度,需要的快拍数也较少。Adaptive beamforming technique is an important technology of array signal processing for receiving the desired signal and rejecting the interferences. The null broadening technology could be applied to improve the robustness of adaptive beamforming algorithms against the mis- match between the weights and received data. The mismatch is caused by fast moving interfer- ences and shaking platform. An adaptive beamforming algorithm based on the reconstruction of interference plus noise eovariance matrix is proposed. The width and depth of nulls could be ad- justed by this algorithm freely. Compared with the existing algorithms, the proposed method can obtain higher SINRs and deeper nulls with fewer snapshots.

关 键 词：天线阵列 自适应波束形成 零陷展宽 

分 类 号：TN820.1[电子电信—信息与通信工程]