自适应数字波束形成在大型面阵中的应用

Application of Adaptive Digital Beam forming in Large Planar Phased Array System

ADBF技术使得雷达能根据干扰特性,自适应地在干扰方向形成零点,以对付强有源干扰。另外,大部分雷达还需要天线具有低或超低副瓣,以提高雷达在强杂波背景下检测目标的能力。随着相控阵雷达阵元数的增多,需要处理的数据量变大,在很短的时间内实现DBF面临很多问题。本文针对大型面阵,讨论了如何利用修正的采样矩阵求逆算法,在有限快拍数内根据干扰环境自适应地形成零点,同时实现天线超低副瓣性能的问题。仿真结果表明了方法的有效性。

The radar can be enabled the jamming properties by using ADBF tion, most radars also require that the ability for the target against the strong the data quantity needs to be processed to form null beam in the jamming direction adaptively according to technology so as to counter the intensive active jamming. In addi- antenna has low or ultralow sidelobe so as to improve the detect- clutter background. As increment of phased array radar elements, becomes large. So, there are lots of problems to implement DBF in very short period. Aiming at large planar arrays, this paper discusses how to form null beam adaptively in the limited snapshots according to the jamming environment by using the modified sampling matrix inversing （SMI） algorithm and.realize the ultra--low sidelobe performance of the array antenna simultaneously.