摘要
自适应旁瓣对消是雷达抗干扰的有效方法。为了提高雷达旁瓣对消中算法的收敛速度和稳态性能,针对目前定步长LMS算法存在的问题,本文对该算法进行了分析以及步长改进,提出一种基于双曲余弦函数的自适应变步长LMS算法,并对不同的影响因子进行了仿真分析。通过对加噪的信号进行自适应旁瓣对消仿真分析,仿真结果表明改进的自适应变步长LMS算法对消器可以有效地抑制旁瓣干扰信号,提高对消器的收敛速度和稳态性能,提高输出信噪比。
Adaptive sidelobe cancellation is an effective radar anti-jamming technique.In order to improve the convergence speed and steady-state performance of the LMS algorithm in radar sidelobe cancellation,this paper analyzes current fixed-step LMS algorithm and improves its step size design,based on which a hyperbolic cosine function-based adaptive LMS algorithm featuring variable step size is proposed.In addition,simulated adaptive sidelobe cancellation is performed using signals added with noise.The simulation results show that the improved LMS algorithm can effectively suppress the sidelobe jamming signals,improve the convergence speed and steady-state performance of the canceller,and improve the output signal-to-noise ratio.
作者
刘喜洋
余建宇
陈威
杨伟
LIU Xiyang;YU Jianyu;CHEN Wei;YANG Wei(Xi’an Electronic Engineering Research Institute,Xi’an 710100;Unit 77618 of PLA,Lhasa 850000)
出处
《火控雷达技术》
2022年第3期46-49,共4页
Fire Control Radar Technology
关键词
旁瓣对消
自适应变步长
LMS算法
自适应滤波
sidelobe cancellation
adaptive variable step size
LMS algorithm
adaptive filtering
