Design And Implementation Of A Control Subsystem For A Digital Channelized Receiver

Shortwave communication is the only remote communication method which is not restricted by the network hub and active relay,and has an irreplaceable position in the war and natural disasters.The traditional analog channelized receiver has many problems,such as poor channel equalization,temperature drift,gain variation,hardware cost and volume increase sharply with the increase of channel number.The shortwave digital channelized receiver has received extensive attention because of its flexible structure,good stability and high performance to price ratio.The main work of this paper is divided into two parts.Firstly,the overall scheme design of shortwave digital channelized receiver is completed.Secondly,the control subsystem of the receiver is designed and implemented.First of all,the overall scheme of digital channelized receiver is given in this paper;then,the control subsystem of channelized receiver is researched in detail,and the hardware design with PCB is given,including specific power,clock,CPU,FPGA and other major hardware module;finally,the paper finished the debugging of control subsystem hardware platform,including the hardware and interface software.The system can achieve 1.49-30.01MHz full band reception.Compared with the traditional digital receiver,the system has the advantages of flexible structure,high sensitivity,high signal to noise ratio,less hardware resources and so on.After the final physical test,the overall target of the receiver meets the system requirements,the control subsystem is stable and reliable.