卫星导航用户终端多阵元抗干扰天线空间特性分析与研究  

Analysis and Research on Spatial Characteristics of Multi-element Anti-jamming Antenna for Satellite Navigation User Terminal

作　　者：武智佳 于合理 焦海松[1] 贾赞杰 代桃高 耿泽淇 WU Zhijia;YU Heli;JIAO Haisong;JIA Zanjie;DAI Taogao;GENG Zeqi(Unit 63883,PLA,Luoyang 471000,China)

机构地区：[1]中国人民解放军63883部队,河南洛阳471000

出　　处：《无线电工程》2023年第4期853-859,共7页Radio Engineering

基　　金：国家自然科学基金(41804035)。

摘　　要：为解决卫星导航用户终端多阵元抗干扰天线缺少空间特性数据支撑、实际电磁环境因素考虑较少等问题,设计实现了基于功率倒置的空频自适应调零仿真算法,通过数学仿真和实际实验相结合的方式分析了不同干扰信号与导航信号间夹角、不同干扰信号间夹角、不同干扰信号来向以及超自由度干扰对多阵元抗干扰天线的影响。研究表明,抗干扰天线在抑制干扰信号的同时也会抑制附近入射的卫星导航信号;干扰信号不同来向对抗干扰天线影响较大;干扰源间夹角不同,输出的信干噪比也存在明显差异,在一定范围内,夹角越小,干扰效果越差;超自由度干扰条件下,多阵元抗干扰天线的抗干扰能力将严重恶化,干扰功率仅需达到抗干扰处理的启动门限,即能消耗多阵元抗干扰天线的自由度。In order to solve the problems of lack of spatial characteristic data support for multi-element anti-jamming antennas of satellite navigation user terminals and less consideration of actual electromagnetic environment factors,a space-frequency adaptive zero nulling simulation algorithm based on power inversion is designed and implemented.Through the combination of mathematical simulation and practical experiment,the influences of different angles between jamming signals and navigation signals,angles between jamming signals,directions of jamming signals and super-degree-of-freedom jamming on multi-element anti-jamming antenna are analyzed.The studies show that the anti-jamming antenna can suppress the nearby incident satellite navigation signals while suppressing the jamming signal;the different directions of the jamming signal have a greater impact on the anti-jamming antenna;with different angles between jamming sources,the output signal to interference plus noise ratio is obviously different;in a certain range,the smaller the included angle,the worse the interference effect;under the condition of super-degree-of-freedom interference,the anti-jamming capability of the multi-element anti-jamming antenna will be seriously deteriorated,and the interference power only needs to reach the start threshold of anti-jamming processing.That is,the degree of freedom of the multi-element anti-jamming antenna can be consumed.

关 键 词：自适应调零 抗干扰天线 空间特性 干扰方向 超自由度干扰 

分 类 号：TN97[电子电信—信号与信息处理]