一种改进的自适应波束形成技术的研究  

Research of A Improved Adaptive Beamforming Method

作　　者：郑超[1] 高恒[1] 丁若梁[1] 

机构地区：[1]西安电子工程研究所,陕西西安710100

出　　处：《时代报告（学术版）》2012年第6期112-113,共2页Time report

摘　　要：在阵列信号处理过程中，有限次快拍采样会使得到的自适应波束出现畸变的问题，此时，采用幅度加权来抑制副瓣的效果也不太理想。本文将分析一种基于协方差矩阵非线性变换的自适应波束形成技术，对接收数据协方差矩阵进行非线性变换，然后采用Capon法形成自适应波束。通过仿真，表明该方法具有良好的波束保形能力，信干噪比损失较小，波束经幅度加权后，副瓣高度可降低约10dB。In array signal processing, the performance of adaptive beam pattern degrades under finite snapshot condition.Amplitude weighting to suppress the side lobe is also not really perfect.The adaptive beamforming method based on nonlinear functions of the covariance matrix is analysed, transform the covariance matrix of the received data by nonlinear transformation,then form the adaptive beam with capon algorithm. The simulating results show a good beam pattern with slight loses, and amplitude weighting will get the lower sidelobe, about 10 dB.

关 键 词：协方差矩阵 非线性 自适应 波束畸变 幅度加权 

分 类 号：V243[航空宇航科学与技术—飞行器设计]