一种新的GPS空时抗干扰方案  

A novel GPS space-time anti-jamming scheme

作　　者：赵欣[1] 赵琳[1] 温明[1] 

机构地区：[1]哈尔滨工程大学自动化学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2011年第3期322-327,共6页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(60974104)

摘　　要：为了解决GPS子空间跟踪抗干扰的干扰维数估计问题,通过分析FAPI子空间跟踪算法,并讨论干扰维数的估计对算法性能的影响,利用GPS抗干扰的特殊性,提出基于部分协方差阵特征值分解的GPS"有效"干扰个数估计方法,并联合FAPI算法和本文提出方法,得到一种新型空时GPS子空间抗干扰方案.仿真结果表明"有效"干扰个数可以被实时准确估计,子空间跟踪误差同时能快速收敛.当取采样频率为4倍于GPS中频频率时约为400个采样点时间,验证了方案的有效性与实用性.In order to estimate the interference dimension in anti-jamming of GPS subspace tracking,by analyzing the FAPI subspace tracking algorithm and the effect of the interference dimension on the algorithm performance and by utilizing the particularity of GPS anti-jamming,a method to estimate the effective interference number base for the eigenvalue decomposition of the partial covariance matrix was proposed.A novel scheme for GPS space-time anti-jamming based on FAPI algorithm and interference subspace estimation was attained.The simulation results indicate that the real-time effective interference number can be estimated accurately and the subspace error converges rapidly.The time for sampling about 400 points was gained when the sampling frequency was 4 times of GPS intermediate frequency.The proposed scheme was shown to be valid and practical.

关 键 词：全球定位系统 抗干扰 FAPI 空时信号处理 子空间 

分 类 号：TN91[电子电信—通信与信息系统]