一种短波软件无线电台数字中频单元的设计与实现

摘要

根据实际应用需求,基于FPGA设计了一种可用于民用短波电台的中频数字处理单元.分析了相应的工作原理、性能特点及实现方法；结合音频信号的处理流程进行了深入的研究并实现了该单元.经过实际测试,证明所设计的中频数字单元性能优良,可满足使用要求.%Based on actual application requirements, a design of IF digital processing unit which can be used in civilian HF radio set is proposed based on FPGA in this paper. The operating principles, performances, features and implementing methods are analysed and deeply researched in combination with the processing flow for audio signal. The digital IF unit was implemented on the basis of above analysis and research. The testing result indicates that the designed IF digital unit is excellent in performance and can meet the operation requirements.