机载数据链通信系统波束成形零陷展宽研究  

Research on Beamforming Null Broadening in Airborne Data Link Communication System

作　　者：齐勇 王华锋 岐晓蕾 苗红霞 QI Yong;WANG Huafeng;QI Xiaolei;MIAO Hongxia(School of Information Science and Technology,North China University of Technology,Beijing 100144,China;School of Information and Communication Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China)

机构地区：[1]北方工业大学信息学院,北京100144 [2]北京邮电大学信息与通信工程学院,北京100876

出　　处：《北方工业大学学报》2024年第1期29-36,共8页Journal of North China University of Technology

基　　金：国家重点研发计划项目(2022YFB4701301);北京市教委科研计划项目(KM202110009001)。

摘　　要：机载数据链通信系统广泛应用于航空、无人机、通信、军事等多方面。然而其所处的高动态环境普遍受到强干扰影响,抗干扰能力亟待加强。本文研究基于空域抗干扰中的传统稳健自适应波束成形技术,针对机载平台干扰发生快速变化场景,干扰易被移除零陷范围而导致抗干扰算法失效问题,设计改进了一种适用于机载数据链的高动态环境抗干扰波束成形零陷展宽算法——施加旁瓣区域抑制约束的投影子空间分解(Sidelobe region Suppression Constrained EIGen-subspace decomposition,SSC-EIG)。该算法基于特征子空间投影法,事先得到干扰来波的大致范围的先验信息,施加旁瓣区域抑制约束并估计旁瓣干扰功率。仿真结果表明,在干扰方向高速移动时,阵列天线输出信干噪比明显提升。波束图零陷得到展宽,抗干扰稳健性进一步增强,并减轻了在高动态环境下无人机导航、导弹制导和地空通信等机载数据链路正确接收信令信号的困难。The airborne data link communication system is now widely used in aviation,drones,communications,military and other aspects.However,the high dynamic environment in which it is located is generally affected by strong interference,and the anti⁃interference ability needs to be strengthened urgently.This paper studies the traditional robust adaptive beamforming technology based on spatial anti⁃jamming,aiming at the scene of rapid changes in airborne platform interference,the interference is easily removed from the null range,which leads to the failure of the anti⁃jamming algorithm.This paper improves and designs one null broadening algorithms named Sidelobe region Suppression Constrained EIGen⁃subspace decomposition(SSC⁃EIG)suitable for airborne data link high dynamic environment.This algorithm is based on the eigen⁃subspace decomposition,obtaining a priori information about the approximate range of the interference wave in advance,and imposing sidelobe region suppression constraints and estimates the sidelobe interference power.The simulation results show that when the interference direction moves at high speed,the output signal⁃to⁃interference⁃noise ratio is significantly improved.The beam pattern null is widened and the anti⁃jamming robustness is enhanced.It alleviates the difficulty of airborne data link correctly receiving signaling signals in application scenarios such as Unmanned Aerial Vehicles navigation,missile guidance,and ground⁃to⁃air communications when interference changes rapidly.

关 键 词：机载数据链 抗干扰 自适应波束成形 稳健性 零陷展宽 

分 类 号：TN929.5[电子电信—通信与信息系统]