基于FPGA的高动态GPS信号实时捕获设计

Design for fast acquiring of high dynamic GPS signal based on FPGA

提出了一种高动态环境下GPS接收机实时捕获的FPGA硬件实现方案。此方案针对高动态环境下GPS接收机对信号捕获速度的要求和当前硬件平台,在平均采样预处理后,选取5组数据中的2组进行捕获,以捕获精度的较小降低为代价实现单颗GPS卫星信号的实时捕获。通过对高动态环境下模拟信号捕获过程的仿真和硬件实现,验证了此种捕获方法的正确性和可行性。

A realization scheme of hardware receiver system using for the fast acquiring of high dynamic GPS signal is pro- posed. According to the acquiring speed requirements of the GPS receiver and the hardware platform, this scheme chooses 2 sets of average samples among 5 sets after the averaging sampling technique processing. It realizes the real-time acquiring of the single satellite GPS signals in cost of small accuracy decline. The simula- tion results and the hardware implementation results of the high dynamic GPS signal show the validity and the feasibility of the method.