基于Qsys的FFT组件IP核设计及应用  

Design and Application of Custom Built FFT IP Core Based on Qsys Component Editor

作　　者：刘三军 来国红 孙玲姣 黄欣 杨瑞 LIU Sanjun;LAI Guohong;SUN Lingjiao;HUANG Xin;YANG Rui(College of Information Engineering,Hubei Minzu University,Enshi 445000,China;College of Information Engineering,Science and Technology College of Hubei Minzu University,Enshi 445000,China)

机构地区：[1]湖北民族大学信息工程学院,湖北恩施445000 [2]湖北民族大学科技学院信息工程学院,湖北恩施445000

出　　处：《湖北民族学院学报（自然科学版）》2019年第2期206-211,共6页Journal of Hubei Minzu University(Natural Science Edition)

基　　金：湖北省教育厅科学研究项目(B2014243)

摘　　要：使用FPGA开发工具Qsys自定制组件的方法,设计了一种具有Avalon总线接口的快速傅立叶变换IP核,能够方便地挂接到NiosII软核处理器上,从而协助CPU实现快速傅里叶变换的功能.该IP核能够灵活的配置成8位、10位、12位或14位等位宽,也可以配置成能对2n(n=6,7,8,…)个采样点进行傅立叶正变换或反变换.同时本文还给出了该IP核的一个应用范例,即在FPGA开发板上构建了一款音频信号分析仪的SOPC系统.实验结果表明,该IP核能够圆满的完成频谱分析和失真度分析的任务.该IP核具有使用方便、配置灵活、精度高等优点.A Fast Fourier Transform IP core which can be added to Avalon bus is designed in this paper.The method of creating new component in Altera Company’s Qsys tool is used in the design.The IP core can be parameterized as 8,10 or 12 bits width and so on,and the sampled data number can be parameterized as 2 to the n th power,here n is an integer from 6 to more.The IP core can also be configured as inverse transform and the input data can be complex numbers.This paper takes the audio frequency analyzer system as an application example whose SOPC system includes the FFT core on the DE2 developing board.The experimental result proves that the FFT IP core works perfectly,and has the advantages of feasible configuration,easy operation,and high precision.

关 键 词：片上可编程系统 知识产权核 嵌入式 AVALON总线 快速傅里叶变换 

分 类 号：TN914.3[电子电信—通信与信息系统]