基于CCSDS协议的中频信号源设计与实现

Design and Implementation of Intermediate Frequency Signal Source Based on CCSDS Protocol

针对深空通信的复杂环境,设计了一种基于CCSDS协议的中频信号源系统,可产生多种基于CCSDS协议的深空通信信号。该系统上位机采用LabWindows虚拟仪器开发环境,通过PCI接口与集成了DsP和FPGA单元的信号板卡互联,采用正交调制算法,在不改变硬件电路的情况下实现多种调制方式和参数。经测试,该系统输出精准、稳定,各项参数均符合设计要求,可实现对CCSDS协议的信号模拟。

Aiming at the complex deep space communication environment, an intermediate frequency signal source system based on CCSDS protocol is designed. The signal source can produce a variety of modulation signal based on CCSDS protocol to be used in the study of deep space communications. In this sy s tem, the upper machine software is running in LabWindows virtual instrument development environ-ment and the signal processing card with DSP and FPGA modules connecting the upper machine is inte-grated through the PCI interface. By using orthogonal modulation algorithm, it can generate various kind of modulated signal with different parameter without changing the hardware. Through the t est , this system can output precise and stable intermediate frequency modulated s ignal , and the parameters meet the de -sign requirements, which means the system can simulate the signal based on CCSDS protocol.