基于干扰抵消的GPS伪卫星抗远近效应方法研究  

Research on Near Far Resistant Method Based on Interference Cancellation to GPS Pseudolite

作　　者：汪婕[1] 廉保旺[1] 张志鹏[1] 

机构地区：[1]西北工业大学电子信息学院,陕西西安710072

出　　处：《测控技术》2008年第3期43-45,48,共4页Measurement & Control Technology

摘　　要：针对GPS伪卫星导航系统中出现的"远近效应"问题,提出了一种新的应用于GPS接收机端的解决方法。利用发生"远近效应"时不同通道间相关峰值的差值判断出强干扰信号,重构强干扰并将其从接收信号中抵消。建立了系统模型,给出了该方法的实现原理框图,并详细分析了该方法的性能。仿真和信噪比分析都表明,该方法有较好的抗"远近效应"能力,适合GPS伪卫星导航系统应用。To decrease the interference arising from near far problem in GPS pseudolite navigation system, a new method applied at receiver is proposed. By detecting the interference through the difference of correlation peak value in different channels, the interference can be regenerated and counteracted from the receiving signal. System model and a scheme to implement the method are presented. Analysis of the system performance is also given. The result of simulations and theoretical analysis of SNR demonstrate that this method has a great capability to resist the near far problem and can be widely used in GPS pseudolite navigation system.

关 键 词：伪卫星 远近效应 干扰抵消 信噪比 

分 类 号：TN927[电子电信—通信与信息系统]