基于射频采样的短波宽带接收机设计

Design of RF Sampling Short-wave Wideband Receiver

目前大多数短波接收设备采用了于软件无线电理念的中频采样架构,该架构的接收机存在体积大、成本高及设备性能受前端模拟器件影响大等问题。阐述了一种基于射频采样的短波宽带接收机设计方案,该接收机采用单通道ADC对短波全频段进行射频直接采样,瞬时处理带宽为28.5 MHz,并在FPGA内实现了短波频段内特定信号的自动识别感知,具有高灵敏度、大动态等特点,在保证性能的同时解决了现有设备体积大、成本高等问题。

At present,most of the short-wave receiving equipment is based on the IF sampling architecture of software radio.Thereceiver of this architecture has many problems,such as large volume,high cost and great influence of analog front-endon the performance of the equipment.This paper expounds a short wave wide-band receiver design scheme based on RF sampling,the receiver samples short wave full frequency by single channel ADC,instantaneous processing bandwidth for 28.5MHz,and within the FPGA to realize a specific signal automatic identification,has the characteristic such as hignsensitivity,large dynamic,solves the existing equipment at the same time the performance of large volume and high cost problems.