主瓣可控的鲁棒自适应波束形成算法  

Robust Adaptive Beam-Forming Algorithm with Controllable Main-Lobe

作　　者：武炳阳 马彦恒[1] 

机构地区：[1]军械工程学院,河北石家庄050000

出　　处：《现代防御技术》2017年第3期129-132,共4页Modern Defence Technology

摘　　要：自适应波束形成技术能够有效地接收目标信号并抑制干扰,提高阵列输出的信干比。但传统自适应算法无法控制波束形状,为了形成固定主瓣宽度的波束,通过定义权重函数将波束形成问题转化为加权方向图综合问题,对协方差矩阵修正以提高算法鲁棒性,并用迭代FFT方法解决得到的表达式。通过仿真分析,该自适应波束器能够很好的控制主瓣宽度,并在干扰方向上形成零陷。Adaptive Beam-forming technology can effectively improve the SINR of array by receiving the desired signal and rejecting the interference, while traditional adaptive algorithms can not control the beam shape. In order to form a fixed width of the main-lobe, beam-forming problem is transformed into a weighted pattern synthesis problemby defining the weight function. The modified covariance matrix im- proves the robustness of the algorithm, and iterative FFT method is used to solve the resulting expression. The simulation results show the proposed method can control the width of the main-lobe and form a null in the direction of interference.

关 键 词：自适应波束形成 主瓣宽度 鲁棒性 循环FFT 空域滤波 协方差矩阵修正 

分 类 号：TN959.6[电子电信—信号与信息处理] TP301.6[电子电信—信息与通信工程]