基于Vivado HLS 的FFT IP核设计与实现

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1024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。

Design and Implementation of FFT IP Core based on Vivado HLS

Abstract: 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 1024-point FFT algorithm 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 delay time has saved 19% to 40%, LUT resources have saved 18.5%. The test result shows that FFT IP core successfully implements spectral analysis of the audio signal.