卫星定位信号接收机系统研究与设计

Research and Design of the SPS Signal Receiver

本文在研究卫星定位信号接收机系统的构成及原理之后,介绍了一种基于Nemerix公司GPS芯片组的卫星定位信号接收机的设计。该接收机主要由射频前端和基带处理器两个部分组成,分别以NJ1006A和NJ1030A为核心芯片。射频前端芯片NJ1006A接收卫星定位信号后将其变换为数字中频信号,并传给基带处理器NJ1030A进行信号的捕获、跟踪以及定位解算等一系列的处理,输出定位信息。文章讨论了系统的整体结构,重点对系统中各部分的外围电路和相互接口进行了设计与分析,并给出了各部分在调试时的注意问题。最后,给出了软件下载过程和测试结果。实验结果表明,系统的整体设计是合理有效的。

This paper introduces a design of SPS signal receiver based on Nemerix GPS chipset after investigating the structure and the theory of the SPS. The receiver is made up of RF front and baseband processor, with NJ1006A and NJ1030A as its core chip. The RF front chip NJ1006A receives the SPS signal and changes it into IF signal which is then delivered to the baseband processor NJ1030A. NJ1030A does a series of processing including capture and track of the signal and position calculation and so on,and then outputs the position information, The article discusses the whole structure of the system and emphasizes the design and analysis of the periphery circuit for each part as well as the interface between them. It also introduces some skills that you should pay attention to when debugging each part of the system. Finally the paper gives the software download course and the test result which proves that the design of the system is reasonable and effective.