摘要
现代战争中,大量指挥控制和情报信息通过卫星传输,卫星通信地球站的抗干扰能力是保证信息通畅的基础。针对多个小型地球站受干扰无法通信的情况,提出基于面天线阵列的最小方差无失真响应(MVDR)算法。首先分析卫星通信地球站天线要素,给出面天线的增益表达式,建立面天线阵列接收信号的数学模型;然后研究MVDR改进算法波束形成机理,推导出反射面天线阵列输出信干噪比和最优权矢量的算式,分析均匀线阵在部分角度抗干扰效果不佳的原因,并针对该问题提出一种阵列布设逼近最小冗余阵且阵元位置互质的线性阵列;最后通过多组仿真实验验证所提算法对于提升阵列抗干扰性能的有效性。仿真结果表明,所提算法可提高面天线阵列的卫星方向增益、增大阵列的输出信干噪比、有效抑制卫星通信下行链路干扰。
In modern warfare,a large amount of command and control and intelligence information is transmitted through satellites.The anti-jamming ability of satellite communication earth stations is the basis for ensuring the smooth flow of information.As for the case that multiple small earth stations cannot communicate due to jamming,the Minimum Variance Distortionless Response(MVDR)algorithm based on the reflector antenna array is proposed.Firstly,the elements of antennas at satellite communication earth stations are analyzed,the gain expression of the reflector antenna is given,and a mathematical model for the reception of signals by the reflector antenna array is established.Then,the mechanism of the MVDR improvement algorithm for beamforming is studied,the calculation formulas for the output Signal to Interference plus Noise Ratio(SINR)and optimal weight vector of the reflector antenna array are derived,the reasons for the poor anti-jamming effect of uniform linear arrays at certain angles are analyzed,and a linear array whose deployment approximates the minimum redundant array with mutually prime element positions is proposed to address this issue.Finally,the effectiveness of the proposed algorithm in improving the anti-jamming performance of the array is verified through multiple simulation experiments.The simulation results show that the proposed algorithm can improve the satellite direction gain of the reflector antenna array,increase the output SINR of the array,and effectively suppress the downlink jamming of satellite communication.
作者
习延鹏
刘剑
肖楠
XI Yanpeng;LIU Jian;XIAO Nan(Information&Navigation College,Air Force Engineering University,Xi'an 710000,China)
出处
《电光与控制》
CSCD
北大核心
2024年第6期47-55,86,共10页
Electronics Optics & Control
基金
国家自然科学基金(61871474)
陕西省自然科学研究基础计划(2020JM-344)
研究生创新实践基金(CXJ2022024)。
