基于FPGA IP核的FFT实现与改进  

Implementation and Improvement of FFT Based on FPGA IP Core

作　　者：栗旭光 何国经[1] 刘江涛[1] 

机构地区：[1]西安电子科技大学技术物理学院,陕西西安710071

出　　处：《电子科技》2013年第12期96-100,共5页Electronic Science and Technology

摘　　要：利用FPGA IP核设计了一种快速、高效的傅里叶变换系统。针对非整数倍信号周期截断所导致的频谱泄露问题,提出了一种通过对输入信号加窗处理来抑制频谱泄露的方法。利用Modelsim和Matlab对设计方案进行了仿真,同时在Altera公司的Cyclone II硬件平台上进行了验证。验证结果表明,系统性能良好,改进效果明显。This paper designs a high speed of frequency spectrum caused by the truncation leakage of frequency spectrum by windowing the and efficiency FFT system based on FPGA IP Core. For the leakage of non integral multiple of signal period, a method for restraining input signal is proposed. This design is simulated with Modelsim and Matlab, and verified on the Altera Cyclone II hardware platform. The results show that the system has good per- formance with significant improvement.

关 键 词：FFT FPGA IP核 加窗处理 

分 类 号：TP332.3[自动化与计算机技术—计算机系统结构]