GNSS array receiver faced with overloaded interferences:anti-jamming performance and the incident directions of interferences  

作　　者：WANG Jie LIU Wenxiang CHEN Feiqiang LU Zukun OU Gang 

机构地区：[1]College of Electronic Science,National University of Defense Technology,Changsha 410073,China [2]College of Electronic Engineering,National University of Defense Technology,Hefei 230031,China

出　　处：《Journal of Systems Engineering and Electronics》2023年第2期335-341,共7页系统工程与电子技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(62003354).

摘　　要：Anti-jamming solutions based on antenna arrays enhance the anti-jamming ability and the robustness of global navigation satellite system(GNSS)receiver remarkably.However,the performance of the receiver will deteriorate significantly in the overloaded interferences scenario.We define the overloaded interferences scenario as where the number of interferences is more than or equal to the number of antenna arrays elements.In this paper,the effect mechanism of interferences with different incident directions is found by studying the anti-jamming performance of the adaptive space filter.The theoretical analysis and conclusions,which are first validated through numerical examples,reveal the relationships between the optimal weight vector and the eigenvectors of the input signal autocorrelation matrix,the relationships between the interference cancellation ratio(ICR),the signal to interference and noise power ratio(SINR)of the adaptive space filter output and the number of interferences,the eigenvalues of the input signal autocorrelation matrix.In addition,two simulation experiments are utilized to further corroborate the theoretical findings through soft anti-jamming receiver.The simulation results match well with the theoretical analysis results,thus validating the effect mechanism of overloaded interferences.The simulation results show that,for a four elements circular array,the performance difference is up to 19 dB with different incident directions of interferences.Anti-jamming performance evaluation and jamming deployment optimization can obtain more accurate and efficient results by using the conclusions.

关 键 词：antenna arrays ANTI-JAMMING overloaded interferences incident direction 

分 类 号：TN967.1[电子电信—信号与信息处理]