Research on Signal Processing of Ultrasonic Based on FPGA

To reduce the impact of noise on detecting precision in ultrasonic flow detection,the FIR filter is constructed by FPGA.A novel method of lookup table(LUT) is adopted to replace the multiplication of filter.It is proved by experimental result that the hardware spending in chip is reduced,and the operation speed is improved by the method,and the excellent effect of the filter is presented by the experimental result.