Implementation of FIR filter based on Xilinx IP core
Jiangchun Yu, Hanhua Zhong, Pengyang Yan · 2020
In order to accurately calculate the effective value of voltage and current, it is necessary to filter out the harmonics in voltage and current signals in the process of developing power RTU with Zynq-7000 series FPGA. This paper discusses the use of the Xilinx FIR IP core to achieve this filtering function. Firstly, we use FDAtool to design a 50 Hz band-pass filter, analyze the frequency characteristics of the filter, and then quantize the FIR filter coefficients generated by Matlab tool by calculating the quantization word length, and then import the quantized filter coefficients into the FIR IP core. Finally, the realization and optimization of the IP core are completed by setting the relevant parameters. This method simplifies the design process and makes the realization of the filter easier. The simulation results of MATLAB and FPGA show that the filtering effect is consistent, and the FIR filter consumes fewer resources than the Fourier Algorithm.