Design and implementation of FFT/IFFT in IEEE 802.16d OFDM system

作     者：亓中瑞 张浩 邱昕 刘壹 陈杰 

作者机构：Institute of Microelectronics Chinese Academy of Sciences 

出 版 物：《Journal of Harbin Institute of Technology(New Series)》 (哈尔滨工业大学学报（英文版）)

年 卷 期：2009年第16卷第6期

页      面：776-780页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 081504[工学-水利水电工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 0815[工学-水利工程] 081001[工学-通信与信息系统] 

基　　金：Sponsored by the National Natural Science Foundation of China(Grant No.60425413) 

主　　题：FFT/IFFT OFDM pipeline structure branch of butterfly un-it symmetrical ping-pang structure 

摘      要：The IEEE 802. 16 standard specifies the air interface of wireless metropolitan area network （WMAN）, and aims to provide wireless broadband access for integrated voice and video services. This paper presents the efficient design and implementation of fast Frouier transform （FFT） and inverse fast Frouier transform （IFFT） for the application in IEEE 802. 16d orthogoual frequency division multiplexing （OFDM） system. In this design, a novel pipeline structure for the branch of butterfly unit （BU） is proposed, which can improve the processing symbol rate by adding the number of branch flexibly. The symmetrical ping-pang structure of random access memory （RAM） is performed to increase the system throughput. Simulation results reveal that only with 1 branch of BU, the proposed FFF/IFFT design can almost achieve the maximum bandwidth requirement of IEEE 802. 16d OFDM system. And this design has been verified by FPGA and successfully implemented in the prototype of WiMAX transceiver.