LTE物理上行共享信道中FFT算法分析与FPGA实现

快速傅里叶变换FFT作为数字信号处理的核心技术之一,使离散傅里叶变换的运算时间缩短了几个数量级,并在LTE中有重要的应用。现场可编程门阵列FPGA是近年来迅速发展起来的新型可编程器件。本文主要研究如何利用FPGA实现FFT算法,包括算法选取、算法验证、系统结构设计、FPGA实现和测试整个流程。设计采用Good-Thomas算法,利用Verilog HDL描述的方式实现了不定点FFT系统,并以FPGA芯片virtex4为硬件平台,进行了仿真、综合、板级验证等工作。仿真结果表明其计算结果达到了一定的精度,运算速度可以满足一般实时信号处理的要求。

Algorithm analysis of FFT in PUSCH and FPGA implementation for LTE

Fast Fourier Transform is the core technique of DSP,and its performing time is shorter a few stages than DFTs,and in the LTE system FFT has important applications.Field Programmable Gate Array is a new type of programmable device at high speed development in recent years.This paper studies the implementation of FFT processor based on FPGA.It includes selection and validation of the arithmetic,design of the whole architecture,implementation and test of the system.This design adopts the algorithm of Good-Thom...