GPS接收机载波跟踪环设计与分析

针对GPS接收机载波跟踪环环宽与跟踪的动态性能问题,在分析影响GPS信号动态性能的主要参数热噪声、晶振Allan相位噪声、晶振振动相位噪声和动态应力的基础上,通过对不同阶数的锁相环、锁频环跟踪门限分析与仿真,主要解决了如何设计GPS接收机的载波跟踪环路的带宽,并使系统性能达到最佳的问题,即使用环宽为18 Hz的二阶锁相环辅助环宽为10 Hz的三阶锁频环可以跟踪动态范围小于10 g、100 g/s的高动态信号。

Design and analyzing of carrier tracking loop for GPS receiver

In this paper,GPS Receiver carrier tracking loop’s bandwidth and tracking dynamic character were stuclied.First analysing the main parameters affecting dynamic performance of the GPS Receivers,including the white noise,Allan phase noise of oscillator,vibration phase noise of oscillator and stress of dynamic.Occording to the analysising and simulation of different order phase lock loop and frequency lock loop,discussed the bandwidth of GPS receiver’s carrier tracking loop we giving out to optimizing the receiver’s dynamic system.Finaly we know that,setting the 2-order phase lock loop bandwidth to 18 Hz assisted 3-order frequency lock loop bandwidth to 10 Hz,the GPS receiver can track dynamic signal under 10 g and 100 g/s.