压制式干扰环境中GPS信号的载噪比估计算法  

The Estimation Method for GPS C/N_0 Under Oppressive Jamming

作　　者：朱海[1] 史文森[1] 蔡鹏[1] 李广博[1] 

机构地区：[1]海军潜艇学院,山东青岛266042

出　　处：《弹箭与制导学报》2014年第3期209-212,共4页Journal of Projectiles,Rockets,Missiles and Guidance

摘　　要：针对GPS信号在压制式干扰的环境中载噪比难以测得的问题,分析了在压制式干扰情况下GPS信号的载噪比特性以及压制式干扰信号在GPS接收机1支路和Q支路中的形式,提出了一种适用于压制式干扰情况下的单通道测定信号载噪比的方法,减小了载噪比的计算误差。接收机利用该方法可以在信号捕获过程中完成载噪比的测量,无需对硬件扩展,实现过程简单、有效,几乎没有增加信号处理的运算量。In view of difficult C/No measurement of GPS signal under oppressive jamming, C/Nocharacteristic of GPS signal under oppres- sive jamming and form of oppressive jamming signal in I channel and Q channel of GPS receiver were analyzed, the method for measuring C/No in signal channel under oppressive jamming was put forward, as a result, the error of C/No calculation was reduced. With this meth- od, GPS receiver could carry out C/No measurement during signal capture without hardware expansion ; furthermore, the measuring process is simple, effective and no increment in calculation of signal processing.

关 键 词：GPS信号 压制式干扰 载噪比 I支路 Q支路 

分 类 号：U666.134[交通运输工程—船舶及航道工程]