空时自适应处理对GPS信号影响与补偿方法  

Effect of space-time adaptive processing on GPS signals and its compensation method

作　　者：相飞[1] 廖桂生[1] 曾操[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《系统工程与电子技术》2012年第1期1-6,共6页Systems Engineering and Electronics

基　　金：国家重点基础研究发展计划(973计划)(2011CB70700);国家高技术研究发展计划(863计划)(2009AA12Z303);国家杰出青年科学基金(60825104);中央高校基本科研业务费专项资金(K50510020028)资助课题

摘　　要：通过推导C/A码全球定位系统(global positioning system,GPS)信号分别经空域自适应处理和空时自适应处理的相关函数,研究了阵列信号处理对C/A码GPS信号捕获性能的影响。理论分析表明,空域自适应处理不影响捕获;而空时自适应处理在抑制干扰的同时使信号产生了畸变,降低了同步和码跟踪精度。针对空时自适应处理造成的信号失真,利用维纳滤波对失真的相关函数进行补偿。仿真结果表明补偿后相关函数的波形有了明显改善,空时自适应处理带来的信号失真也得到有效校正。The correlation function of the C/A code global positioning system（GPS） signal is derived through spatial and space-time adaptive processing respectively.The effect of array signal processing techniques on the signal acquisition for C/A code GPS is analyzed.Theoretical results show that the spatial adaptive processing has no effect on the signal acquisition,and the space-time adaptive processing arises distortion while supressing interference,which degrade the synchronization and code tracking performance.In order to mitigate the distortion induced by the space-time adaptive processing,a Wiener filter is adopted to compensate the distorted correlation function.Simulation results show that,after compensating the correlation function,the resulting waveform is well corrected and the distortion of signals is also corrected effectively.

关 键 词：全球定位系统 空域自适应处理 空时自适应处理 C/A码捕获 

分 类 号：TN911.7[电子电信—通信与信息系统]