基于改进广义线性组合的稳健波束形成算法  

Robust beamforming based on improved generalized linear combination

作　　者：张远驰 胡进 陈宇 何冠良 ZHANG Yuanchi;HU Jin;CHEN Yu;HE Guanliang(The 724 Research Institute of CSSC,Nanjing 210000,China)

机构地区：[1]中国船舶集团有限公司第七二四研究所,江苏南京210000

出　　处：《舰船科学技术》2024年第18期122-127,共6页Ship Science and Technology

摘　　要：针对传统波束形成算法在导向矢量失配和协方差矩阵估计存在误差情况下,出现波束形成性能下降的问题,提出一种基于改进广义线性组合的自适应稳健波束形成算法。该算法首先对接收信号作奇异谱分解进行降噪,然后构造与接收信号快拍数相关的对角加载系数函数,结合降噪处理后的数据构造广义对角加载协方差矩阵,最后基于空域积分和子空间投影思想,估计期望信号的实际导向矢量,并结合新生成协方差矩阵进行波束形成。仿真分析结果表明,在存在期望信号角度估计失准导致导向矢量失配,以及样本数较少造成协方差矩阵估计存在误差时,所提算法能保持较好的输出信干噪比,验证了该算法的稳健性。An adaptive and robust beamforming algorithm was introduced to tackle the performance degradation caused by mismatching guiding vectors and covariance matrix estimation errors in traditional beamforming methods.It first reduced noise through singular spectral decomposition,then constructed a diagonal loading covariance matrix with a function related to signal snapshots,and estimated actual guiding vectors based on null domain integration and subspace projection.These vectors were then combined with the new covariance matrix to form beams.Simulation results proved the algorithm's robustness in maintaining a good output signal-to-noise ratio despite estimation errors and limited samples.

关 键 词：稳健波束形成 广义线性组合 对角加载 奇异谱分析 导向矢量估计 

分 类 号：TN911.7[电子电信—通信与信息系统]