基于FPGA的高速高阶流水线工作FFT设计

为了提高快速傅里叶变换(FFT)处理数据的实时性,本文利用现场可编程阵列(FPGA)逻辑资源丰富、运算速度快的特点以及FFT算法的分级特性,实现了高速、高阶FFT的流水线工作方式设计。通过本文介绍的设计方法,在Xilinx公司Virtex-II系列FPGA上实现了工作频率50MHz以上、数据流水输入、输出的1 024点按时间抽取FFT。

High-speed and High-order Assembly Line FFT Design Based on FPGA

To improve the ability of FFT's (Fast Fourier Transform) processing data in real time, this paper introduces a method to achieve high-speed, high-order and assembly-line FFT design based on FPGA(Field Programmable Gate Array) which has characteristic of high speed and plenty of logical sources and FFT's grading. With this method, 1024 points FFT sampled by time order has been realized by using Xilinx's Virtex_-I FPGA which has operation frequency above 50 MHz.