基于Vivado HLS的FFTIP核设计与实现

Design and Implementation of FFT IP Core Based on Vivado HLS

研究基于Xilinx高层次综合工具HLS设计FFT IP核的新方法,并在Zynq平台上搭建音频频谱显示系统用于对设计的FFT IP核进行测试。首先用MATLAB生成1 024点FFT算法所需要的旋转因子,然后用C语言编写FFT算法程序后经HLS综合成IP核并进行了两次优化,与优化前相比延迟时间节省了19%到40%,LUT资源节省18.5%。测试结果表明,所设计的FFT IP能够成功地实现音频信号的频谱分析。

A new method of designing FFT IP core based on Xilinx high-level synthesis tool HLS is studied,and a audio spectral display test system is built for testing the FFT IP core. First twiddle factors of 1 024-point FFT algo-rithm are generated with MATLAB. Then FFT algorithm program written in C language is integrated into the IP core and is optimized twice. Compared with the previous optimization the delay time has saved 19%to 40%,LUT re-sources have saved 18.5%. The test result shows that FFT IP core successfully implements spectral analysis of the audio signal.