卫星导航干扰抑制与信号增强算法研究  

Study on anti-jamming and signal enhancement algorithms for satellite navigation

作　　者：王福军 丁小燕[2] 谢维华 徐汉青 WANG Fujun;DING Xiaoyan;XIE Weihua;XU Hanqing(Satellite Navigation Center of Beijing,Beijing 100094,China;Institute of Geographical Sciences,Hebei Academy of Sciences,Shijiazhuang 050000,China;31109 Troops,Nanjing 210009,China)

机构地区：[1]北京卫星导航中心,北京100094 [2]河北省科学院地理科学研究所,河北石家庄050000 [3]31109部队,江苏南京210009

出　　处：《全球定位系统》2019年第4期47-52,共6页Gnss World of China

基　　金：国家自然科学基金(41474027)

摘　　要：针对功率倒置(PI)抗干扰算法只能抑制干扰而不能增强导航信号问题,采用级联空域抗干扰算法.第一级通过并行基于正交子空间投影的PI算法处理消除强干扰,然后第二级利用卫星导航信号循环平稳性对期望信号进行波束形成,增强卫星导航信号,进一步提高信干噪比.最后通过仿真验证该方法的有效性.Aiming at the problem that power inversion(PI)anti-jamming algorithm can only suppress jamming but can not enhance navigation signal,a cascade spatial anti-jamming algorithm is proposed.Firstly,the parallel power inversion algorithm based on orthogonal subspace projection is used to eliminate the strong interference,and then blind beamforming based on cyclostationarity is used to enhance the navigation signal and further improve SINR.Finally,the effectiveness of this method is verified by simulation.

关 键 词：空域滤波 功率倒置(PI) 波束形成 正交子空间投影 循环平稳性 

分 类 号：TN911.7[电子电信—通信与信息系统]