Signal processor of laser Doppler radar based on FPGA (field programmable gate array) and processing method

The invention discloses a signal processor of a laser Doppler radar based on an FPGA (field programmable gate array), and relates to the field of radar signal processing. The signal processor comprises an ADC (analog to digital converter) sampling unit, a storage unit and an FPGA processing unit, wherein the FPGA processing unit comprises an ADC configuration module, a storage interface module, a sampled data receiving module, a data input module, an intermediate frequency wave trap module, a diploid down sampling module, an FFT (fast Fourier transform) module, a pulse accumulating module, a peak extracting and Doppler frequency output module and a control module. After electrification, the FPGA configures an ADC and waits an external trigger signal; after the signal is effective, the FPGA begins receiving data sampled by the ADC; and the sampled data are all stored in the storage unit for caching through the FPGA, and then are read in the FPGA from the storage unit to be subjected to processing. By using the