无畸变共形阵列抗干扰算法的降秩处理方法  

Reduced Rank Processing of Distortionless Interference Suppression Algorithm for Conformal Array

作　　者：李晗[1] 何迪[1] 陈新[1] 曲家庆 LI Han;HE Di;CHEN Xin;QU Jiaqing(Shanghai Key Laboratory of Navigation and Location Based Services,Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Radio Equipment Research Institute,Shanghai 201109,China)

机构地区：[1]北斗导航与位置服务上海市重点实验室,上海交通大学,上海200240 [2]上海无线电设备研究所,上海201109

出　　处：《制导与引信》2023年第1期24-31,共8页Guidance & Fuze

基　　金：国家自然科学基金(61971278);八院产学研合作基金(USCAST2020-26)。

摘　　要：基于一种实际需求的共形阵列天线结构,对抗干扰算法进行讨论分析,提出了一种无畸变共形阵列抗干扰算法的降秩处理方法。基于有向阵元模型对凸共形阵列天线的特性进行分析与建模,将共形带来的影响概括为一个共形因子对导向矢量进行修正,再针对滤波器系数加入额外约束以保证系统不会导致北斗信号产生畸变,同时实现干扰抑制并保证北斗信号精度。针对空时滤波带来的计算复杂度偏高的问题,给出了基于前述算法的降秩处理架构,并采用不同的降秩方法对其进行了分析,有效降低了抗干扰算法的计算复杂度,提高了系统的实时性能。An interference suppression algorithm was discussed and analyzed on the basis of a conformal array antenna structure which was actually required.A reduced rank processing of distortionless interference suppression algorithm for conformal array was proposed.The characteristics of convex conformal array antenna were analyzed and modeled on the basis of directional antenna element model.The impact of conformal was summarized as a conformal factor to modify the steering vector,and extra constraints were added to the filter coefficients to ensure that the system did not cause distortion of the Beidou signal.In this way,the suppression of interference is achieved and the accuracy of the Beidou signal is guaranteed at the same time.Aiming at the problem of high computational complexity caused by space-time filtering,a rank reduction processing architecture based on the above algorithm was presented,and different rank reduction methods were used to analyze it.The method effectively reduces the computational complexity of the interference suppression algorithm and helps improve the real-time performance of the system.

关 键 词：北斗卫星导航系统 共形阵列天线 抗干扰 信号畸变 降秩处理 

分 类 号：TN973.3[电子电信—信号与信息处理]