一种零值测试基带信号源设计

Design of a zero value test baseband signal source

摘要:

北斗是我国自主研发并独立运行的全球卫星导航系统,为了解决北斗导航系统的基带信号调试处理难题,提出了一种零值测试基带信号源设计方案。针对导航系统信号通道多、信号传输速率高且时钟信号精度要求高的特点,单板上集成高性能FPGA和DSP处理器,系统采用模块化设计,采用直接数字射频信号发射技术及高速时钟系统设计,信号源可模拟并输出多制式多路调制基带信号,可完成4通道射频信号采集以及4通道直接射频信号的产生,可灵活配置工作参数及设备工作状态的实时监测。该信号源在北斗导航系统的研发过程中获得成功应用,实验结果表明,该信号源兼备收发两大信号处理链路功能,系统具有通用性强、配置灵活、稳定性好等特点,解决了导航系统领域基带信号调试处理难题。

Abstract:

In order to solve the problem of debugging the baseband signal of Beidou navigation system, a zero value test baseband signal source design is proposed. In view of the characteristics of multi signal channel, high signal transmission rate and high precision of clock signal, the high performance FPGA and DSP processor are integrated on the single board. The system adopts modular design, and uses direct digital radio frequency signal transmitting technology and high speed clock system design. The signal source can simulate and output multi-channel multi-channel modulation baseband signal, which can flexibly configure the working parameters and the real-time monitoring of the working state of the device. The experimental results show that the signal source also receives and receives two large signal processing links. The system has the characteristics of strong generality, flexible configuration and good stability, and solves the problem of debugging and processing of the baseband signal in the navigation system.