一种空时联合抗干扰方法研究  

Research on a Combined Space-time Anti-jamming Method

作　　者：谢学东 刘杰 王小旗 韩菁 侯浩 XIE Xuedong;LIU Jie;WANG Xiaoqi;HAN Jing;HOU Hao(Xi'an Satellite Control Center,Xi'an 710043,China;Rocket Force University of Engineering,Xi'an 710025,China;Xi'an University of Technology,Xi'an 710048,China)

机构地区：[1]西安卫星测控中心,陕西西安710043 [2]火箭军工程大学,陕西西安710025 [3]西安理工大学,陕西西安710048

出　　处：《计算机与网络》2023年第6期58-61,共4页Computer & Network

摘　　要：针对星地测控通信链路中的电磁信号干扰,提出空域时域联合的干扰抑制方法。利用地面阵列天线,分离不同方向的各类干扰,等效为接收端多个信道接收的远场信号。通过阵列天线各单元之间的相位差,进行信号波束形成和空间谱估计。采用空时联合干扰抑制方法,将一维的时域和空域干扰抑制拓展至时间与空间联合的二维域内,对干扰信号进行空时二维滤波,并对滤波算法进行了优化设计。通过对单个宽带干扰信号、3个宽带干扰信号的仿真验证,干扰抑制能力达到了80 dB。In order to solve the problem of the electromagnetic interference in the satellite-ground TT&C communication link,a combined space-time anti-jamming method is proposed.Firstly,using the ground array antenna,various types of interference from different directions are separated and become equivalent to far-field signals received by different channels.Using the phase difference of the array antenna elements,beamforming and spatial spectrum estimation are performed.Secondly,the one-dimensional time-domain or spatial-domain interference suppression is extended to the two-dimensional domain combining time and space by using the combined space-time anti-jamming method.The space-time two-dimensional filtering of the interference signal is carried out,and the filtering algorithm is optimized.Finally,through the simulation verification of a single wideband interference signal and three wideband interference signals,the interference suppression capability reaches 80 dB。

关 键 词：阵列天线 空时二维处理 线性约束最小方差准则 误差估计 

分 类 号：TN967.1[电子电信—信号与信息处理]