OFDM中的FFT模块设计及其FPGA实现

Design and FPGA Implementation of FFT Module for OFDM System

提出了一种适用于OFDM系统FFT模块的FPGA实现方法。用硬件描述语言Verilog HDL进行了描述,用ISE6．2i工具完成了设计的输入、综合及布局布线,并用Xilinx SpartanⅡFPGA进行了验证。结果表明,所设计的FFT模块在精度和资源上达到了预期目标,具有简单、高效的特点,可以满足某些OFDM系统的需求。

A FPGA implementation of FFT module for OFDM system is presented. The design is described with Verilog HDL, and is performed with translated, synthesized, route, etc. functions in the ISE6. 2i software. The design has been validated with Xilinx Spartan Ⅱ FPGA. The result shows that the FFT module designed has achieved the expected purpose both on precision and resource, has the feature of simplicity and high efficiency, and can meet the demand of some OFDM systems.