基于微分约束的改进自适应多波束抗干扰算法  

Improved Adaptive Multi-beam Anti-jamming Algorithm Based on Differential Constraints

作　　者：武美成 赵岩[1,2] 王娟 陈亚星 侯博嘉 WU Meicheng;ZHAO Yan;WANG Juan;CHEN Yaxing;HOU Bojia(North Automatic Control Technology Institute,Taiyuan 030006,China;Shanxi Province Key Laboratory of Beidou Navigation Satellite System Information Service Technology,Taiyuan 030006,China;Ocean University of China,Qingdao 266100,China)

机构地区：[1]北方自动控制技术研究所,太原030006 [2]北斗信息服务技术山西省重点实验室,太原030006 [3]中国海洋大学,山东青岛266100

出　　处：《火力与指挥控制》2024年第4期51-59,70,共10页Fire Control & Command Control

基　　金：国防基础科研基金资助项目(JCKY2021110B)。

摘　　要：卫星导航抗干扰技术作为导航接收机中最重要的部分之一,将直接决定导航定位的可靠性和准确性。自适应多波束导航抗干扰技术作为目前抗干扰性能最高的抗干扰技术,其不仅可以对干扰方向进行抑制,还可以对卫星信号方向产生增益,为导航信号提供有效保护。但自适应多波束抗干扰算法需要实时获取卫星信号相对天线阵面的入射角信息,在实际工程应用中,考虑到惯导的姿态测量误差以及载体平台的运动,获取的入射角信息存在一定的偏差,滤波后会引起信号损失。针对这个问题,提出一种基于微分约束的改进自适应多波束抗干扰算法。该方法以LCMV准则为目标函数,通过在卫星信号入射方向和干扰方向上增加一定角度范围进行约束,削弱入射角度偏差引起的信号损失。仿真结果表明,该方法在一定的角度偏差范围内可有效保护卫星信号并抑制干扰信号,从而提高抗干扰性能。Adaptive multi-beam navigation anti-jamming technology,as the anti-jamming technology with the highest anti-jamming performance at present,can not only inhibit the direction of interference,but can also generate gain in the direction of the satellite signal,the effective protection for the navigation signal is provided.However,the adaptive multi-beam anti-jamming algorithm needs to obtain the incidence angle information of the satellite signal relative to the antenna array in real time,and in the actual engineering application,the attitude measurement errors of the inertial guidance and the motion of the carrier platform are considered,there is a certain deviation in obtained incidence information,and the filtering will cause signal loss.To address this problem,an improved adaptive multibeam anti-jamming algorithm based on differential constraints is proposed.The method takes the LCMV criterion as the objective function,and a certain angle range is added as constrains in the incidence direction and interference direction of satellite signals.The signal loss caused by the deviation of the incidence angle is weakened.The simulation results show that the method can effectively protect the satellite signals and suppress the interference signals within a certain angular deviation range,thus the anti-jamming performance is improved.

关 键 词：微分约束 多波束抗干扰 信号入射方向 LCMV算法 

分 类 号：TN973.3[电子电信—信号与信息处理]