GPS软件接收机载波跟踪环路设计

Design of Carrier Tracking Loop for Software GPS Receiver

为研究GPS信号处理技术,首先设计了GPS软件接收机的总体方案,然后对其中的关键模块——载波跟踪环进行深入分析并拟定环路各部件的实现方案,利用MATLAB对环路进行仿真分析,验证了该方案的可行性,最后在Altera公司的FPGA上完成了环路的设计。结果表明,Costas载波跟踪环性能良好,完全能够满足GPS软件接收机的工作要求,具有一定的工程参考价值。

To research into GPS signal processing technology, this paper firstly designs the total scheme for software GPS receiver, then deeply analyzes the key module carrier tracking loop and designs the realization scheme of each part of the loop, uses MATLAB to perform simulation and analysis to the loop, validates the feasibility of this scheme, finally finishes the scheme design of the loop based on FPGA of Altera Co.. The result indicates that the tracking performance of Cos- tas carrier loop is well, can satisfy the requirements of software GPS receiver completely and has definite engineering reference value.