Algorithm Research And System Realization Of LFMCW Radar Signal Processing

LFMCW radar has the advantages of small size,no ranging blind zone,low cost,etc.,and has been widely used in many fields.This paper carries on the simulation analysis to the signal processing algorithm of LFMCW radar,designs the signal processing module circuit and the simulation test software platform.This paper first briefly introduces the working principle of LFMCW radar,and simulates and analyzes the performance of signal processing algorithms such as MTI,MTD,CFAR,etc.The MTI part briefly analyzes the advantages and disadvantages of the primary and secondary cancellation schemes,according to requirements One-time cancellation is selected.The MTD module of this design uses the classic multi-period accumulation method to solve the speed-distance coupling and improve the signal-to-noise ratio.Aiming at the situation where fast targets have cross-distance gates,the MTD processing based on digital domain phase compensation is mainly analyzed.Including MTD processing with known speed phase compensation and MTD processing algorithm with unknown speed phase compensation.The CFAR part briefly analyzes the performance of CA-CFAR,GO-CFAR,SO-CFAR;secondly,the hardware part designs the LFMCW radar signal processing algorithm.Module circuits such as power supply,AD acquisition,timing control,and FPGA module circuits for signal processing algorithms such as MTI,MTD,and CFAR;finally,based on the GUI interface of Matlab,a LFMCW radar signal processing simulation test software platform is designed,which has radar feedback Wave generation,signal processing module algorithm simulation analysis,COE file generation,and data interaction with FPGA.