基于空间响应偏差约束的最小二乘宽带波束形成
Least squares broadband beamforming based on the spatial response variation constraints
陈明建 1罗景青1
作者信息
- 1. 合肥电子工程学院,安徽合肥230037
- 折叠
摘要
针对常规最小二乘宽带波束形成中存在波束响应不满足频率不变特性和干扰方向零陷无法控制的问题,提出了一种基于空间响应偏差约束的最小二乘宽带波束形成方法.该方法通过对阵列空间响应在指定的宽频段和方位范围内施加约束,来控制阵列波束响应的频率不变特性,同时增加一系列的线性约束,可以实现旁瓣电平和干扰零陷的灵活控制.在全方位约束和仅主瓣方位约束两种情况下,均能有效改善宽带波束的频率不变性能,并能在干扰方向上准确形成深零陷.仿真实验结果验证了该方法的有效性.
Abstract
Currently conventional least squares broadband beamforming do not well for the frequency invariant characteristic and null control.A least squares broadband beamforming based on the spatial response variation constraints (SRV) has been proposed in the literature.The array spatial response constraints are added to the prescribed wide frequency and angle range,which can achieve the frequency invariant beamforming.At the same time,a series of linear constraints are used for the sidelobe and null control.Whether the SRV constraint on the whole angle range or mainlobe area angle range,the method can improve the frequency invariant property and achieve deep null control in the direction of the interference accurately,compared the conventional least squares broadband beamforming.Simulation results are given to validate the effectively of the algorithms.
关键词
最小二乘/宽带波束形成/频率不变波束器/空间响应偏差Key words
least square/broadband beamforming/frequency invariant beamformer/spatial response variation constraints引用本文复制引用
基金项目
国家863基金资助课题(2010AA7070501J)
出版年
2013
NETL
NSTL
维普
万方数据