全频段多系统全球导航卫星系统数据采集系统的设计与实现

基于FPGA设计实现了一种全频段多系统全球导航卫星系统(global navigation sattellite system,GNSS)数据采集系统。该系统由宽带天线、宽带射频前端、A/D转换模块、下变频模块、滤波器模块、数据存储模块等构成,可以实现四大导航系统的全频段覆盖,具有并行数据采集通道多、采样速率高、可灵活配置等特点,能够满足全频段多系统软件接收机的各种处理需求。对GALILEO在轨卫星实际数据的测试结果验证了数据采集系统的正确性。该数据采集系统可用于GNSS全频模拟信号源的验证以及在轨导航卫星信号的质量监测。

Design and Implementation of Full-band Multi-system GNSS Data Acquisition System

This paper designs and implements a FPGA based full-band multi-system GNSS data acquisition system, which consists of wideband antenna, wideband RF front-end, A/D conversion modules, down conversion modules, filter modules, and data storage modules. The system can receive all signals of four navigation systems, and has four parallel data acquisition channels with high sampling rate and flexible configuration, which can meet the various processing requirements of full-band multi-system software receiver. The correctness of this data acquisition system has been verified via the receiving test of on-orbit GALILEO satellites signals. The data acquisition system can be used for verifying GNSS full-frequency simulator and for monitoring signal quality of on-orbit navigation satellites.