实时GPS中频信号模拟器硬件开发及验证

为满足对GPS软件接收机和深组合导航研究的需要,开展了基于FPGA的实时GPS中频数字信号模拟器的研制。通过对GPS中频信号模拟器系统架构的分析,提出由计算机完成信号处理、FPGA完成数字调制、以太网完成调制信号输出的系统实现方案。使用SignalTapII和Matlab对系统的关键环节进行了测试和分析。GPS软件接收机对系统的测试结果表明,GPS信号模拟器工作稳定,满足GPS软件接收机测试的需要。

Hardware Development and Verification for Real-Time GPS IF Signal Simulator

For research on GPS software receiver and ultra-tightly-coupled GPS/INS, the development and verification for real-time GPS IF-digital-signal simulator based on FPGA was done. Firstly, the GPS IF-signal simulator structure was designed. Then, an implementation of the structure was realized. In the implementation, digital signal was processed in personal computer, and digital modulation was completed in FPGA, and the modulated signal was output by Ethernet interface. The performance of some key modules of th...