【摘要】 研究了一种快速准确的信号识别系统,可应用于无线电监测。系统由模拟接收、数字接收和处理终端等部分构成,模拟接收部分和现有的无线电监视接收机具有相同的功能,数字接收包括适应不同带宽信号的多速率数据采集和数字下变频,数据实时地由 PCI 总线传输到处理终端,处理终端由微机和加裁的信号识别应用软件构成。试验证实了系统能正确完成数据采集、数据分析和快速准确识别信号等设计功能。系统还具有通用性的特点、功能可选择。更多还原

【Abstract】 A kind of fast and accurate radio surveillance digital system is presented.The system includes analog receiver,digital receiver,and signal recognition software.The analog receiver has the same function with the general receiver.The digital receiver includes multi-rate data collector and digital down converter.Data can be transmitted to PC by PCI bus.All functions can be controlled by FPGA.Experiments demonstrated that the system could detect,analyze and recognize signals accurately.更多还原