Abstract: This paper introduces a new idea of converting RF to IF, samplings the analog signal into digital signal. And then it researches the acquisition, tracking and position resolution based on DSP technology. Through the design of GPS software receiver and signal processing, it is shown that the high flexibility in algorithms and software can be realized based on software radio technology, and the system performance of GPS receiver can be developed.

Key words: GPS, software radio, acquisition, tracking

摘要： 采用Zarlink公司的GP2015对GPS射频前端进行下变频处理，将得到的中频模拟信号转换成数字信号，结合DSP开发技术对中频数字信号进行捕获、跟踪与定位解算，用软件无线电的方法实现GPS软件接收机的模块设计与信号处理。实验结果表明，软件无线电思想能实现算法与软件的高度灵活性，可有效提高GPS接收机的信号处理能力与系统性能。

关键词: 全球定位系统, 软件无线电, 捕获, 跟踪

CLC Number: 

• P228.4