Design Of Continuous Wave Radar Experimental Platform Based On Software Radio

Software radio technology uses software programming to build wireless transceiver system.Continuous wave radar transmits continuous wave signal,and uses the received echo signal's time difference and frequency difference to calculate the target speed,distance and other information.This paper studies the design of CWR experimental platform based on software radio.Through the reasonable system architecture and software design,the system is used to complete the simulation and application of CWR's signal generation,transmission,reception,real-time digital signal processing,ranging,speed measurement,etc.Firstly,the paper studies the technology system of software radio.Starting from the system structure of software radio,it studies the network technology,RF architecture,processer architecture and software development environment related to software radio technology.On this basis,the structure and parameters of software radio CW radar system are analyzed and modeled.Analyze the basic structure of the system,design the signal transmission model of the system,select the working mode and signal parameters of the system.Secondly,the software radio CW radar system is calculated and simulated.The calculation part completes the research and calculation of FMCW radar,including the research of its working principle,as well as the calculation of distance,resolution and other parameters.By the way,the simulation of the whole system function is completed,including the simulation of the transmitted wave signal and the target echo,and the simulation of the radar signal processing algorithm.Then,based on the integrated RF transceiver chip ad9361 and Zynq,the hardware part of the software radio CW radar system is designed.It includes data interface and control interface of ad9361,transmitting and receiving part connected with antenna,clock and power supply circuit to complete hardware system design.Zynq hardware includes DDR3,SPI flash,SD card and other memory related modules,UART,JTAG and other circuits related to serial port.In the hardware system,the software part of the radar system is realized and the whole CW radar system is designed.The software part includes Zynq software design and driver development.Zynq software design is divided into HDL programming and Linux system porting.Driver development is divided into libiio basic module and ad9361?O data transmission.Finally,the software radio CW radar system is debugged and verified.Test the transceiver channel and signal processing module of CW radar system,carry out the ranging experiment of CW radar,and verify the performance of software radio CW radar system.The main supporting technologies of this paper include software radio technology,continuous wave radar technology,digital signal processing technology,electronic system design technology,embedded technology and so on.