摘要
自适应波束形成算法能自动地将波束的主瓣对准期望用户信号的来波方向,零陷对准干扰信号的来波方向;但是常规的自适应算法形成的干扰零限比较尖锐,副瓣容易产生畸变,在干扰、天线平台快速移动的情况下,其性能将会严重下降.基于对权值的范数约束和对零点的最小二乘线性约束优化,提出了一种降低副瓣电平并且加宽零点的自适应波束形成算法.理论分析和计算机仿真结果证明了新算法的有效性.
The adaptive beamforming algorithms ensure the main beams pointing to the directions of the desired user signals and the nulls in the directions of interferers.But the performance would degrade severely when the interferers or antenna platforms move quickly due to the sharp null in the interference' direction and the distortion of the sidelobe.An adaptive method is present based on the weight norm constraint and a least—square null linear constraint optimization to obtain low sidelobe levels and broaden the null.The principles of this algorithm are described explicitly and the simulation results demonstrate the effectiveness of the proposed algorithm.
出处
《四川大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第6期1697-1701,共5页
Journal of Sichuan University(Natural Science Edition)
基金
国家自然科学基金(60672020)
