GPS信号空时处理后码跟踪误差的补偿方法  

Compensation method for code tracking error of GPS induced by space-time adaptive processing

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》2013年第1期15-19,共5页Systems Engineering and Electronics

基　　金：国家重点基础研究发展计划(2011CB707001);国家自然科学基金(61101243);中央高校基本科研业务费专项资金(K50510020028)资助课题

摘　　要：全球卫星定位系统(global position system,GPS)接收机使用空时自适应处理能够增益信号并抑制干扰,但空时自适应处理结构影响GPS信号的定位精度。首先推导空时自适应处理后,GPS信号与参考信号的相关波形,分析了空时处理对码跟踪的影响。然后在码跟踪过程中改进本地参考信号以补偿相关波形的误差,减少空时自适应处理后的码跟踪精度损失。仿真和实测结果验证了算法的有效性。Space-time adaptive processing （STAP） is applied to global position system （GPS） receiver in or- der to gain signal and suppress interference. But the STAP structure may distort GPS signals and affect the po- sitioning accuracy. The correlation function between output GPS signal of STAP and the reference signal is de- rived, and the effect of STAP on code tracking loop is analyzed. The distortion of correlation function is correc- ted by using the proposed reference signal in code tracking loop, and the degradation of code tracking accuracy caused by STAP can be reduced. Simulation and experimental results show the effectiveness of the proposed al- gorithm.

关 键 词：全球卫星定位系统干扰抑制 空时自适应处理 码跟踪 

分 类 号：TN911.7[电子电信—通信与信息系统]