基于MATLAB的OFDM系统设计和仿真.docVIP

word格式精心整理版 范文范例 学习指导 基于MATLAB的OFDM系统设计与仿真 摘要：随着通信产业的逐步发展，4G时代已经来临。作为第四代移动通信技术的核心，OFDM得到了前所未有的关注。它具有频谱利用率高、抗干扰能力强等优点。本文首先简要介绍了OFDM的发展状况以及优缺点，然后详细分析了OFDM的工作原理及其相应的各个模块，并介绍了它的关键技术。最后，分别利用M函数和Simulink做了OFDM系统的设计与仿真，并对误码率进行了分析，得到了BER性能曲线。 关键词：正交频分复用；MATLAB；仿真；BER Design and Simulation of OFDM System Based on MATLAB Abstract: With the gradual development of the communication industry, 4G era has come. As the key technology of the fourth generation mobile communications,OFDM has received unprecedented attention. It has a high spectrum utilization, strong ability of anti-interference and so on. This article describes the development of OFDM and it’s advantages and disadvantages briefly, analysis the working principles of OFDM and each module detailed,and describes it’s key technology.At last, design and simulate OFDM system with the M function and Simulink separately, analysis the error rate and obtain BER performance curve . Keywords: OFDM; MATLAB; Simulation; BER 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc388537497 1 引言 PAGEREF _Toc388537497 \h 4 HYPERLINK \l _Toc388537498 1.1 OFDM概述 PAGEREF _Toc388537498 \h 4 HYPERLINK \l _Toc388537499 1.1.1 OFDM技术发展历史 PAGEREF _Toc388537499 \h 4 HYPERLINK \l _Toc388537500 1.1.2 OFDM技术的优缺点 PAGEREF _Toc388537500 \h 5 HYPERLINK \l _Toc388537501 2 OFDM基本原理及关键技术 PAGEREF _Toc388537501 \h 5 HYPERLINK \l _Toc388537502 2.1 OFDM基本原理及系统构成 PAGEREF _Toc388537502 \h 5 HYPERLINK \l _Toc388537503 2.1.1 OFDM基本原理 PAGEREF _Toc388537503 \h 5 HYPERLINK \l _Toc388537504 2.1.2 串并转换 PAGEREF _Toc388537504 \h 6 HYPERLINK \l _Toc388537505 2.1.3 调制与解调 PAGEREF _Toc388537505 \h 6 HYPERLINK \l _Toc388537506 2.1.4 保护间隔与循环前缀 PAGEREF _Toc388537506 \h 8 HYPERLINK \l _Toc388537507 2.2 OFDM的关键技术 PAGEREF _Toc388537507 \h 10 HYPERLINK \l _Toc388537508 2.2.1 信道估计概述 PAGEREF _Toc388537508 \h 10 HYPERLINK \l _Toc388537509 2.2.2 基于导频的信道估计方法 PAGEREF _Toc388537509 \h 10 HYPERLINK \l _Toc388537510 2.2.3 信道的插值方法 PAGEREF _Toc388537