摘要随着无线通信网络的快速发展，无线网络中的安全问题受到人们的关注。而将正交频分复用（OFDM）技术和跳频通信技术相结合可有效提高网络的安全性，且能提高通信传输速率。该课题分析了OFDM多载波调制技术和跳频通信技术的工作原理；利用Simulink仿真平台设计了基于QPSK调制方式的OFDM跳频通信系统模型；对该通信系统模型进行了仿真。仿真结果表明基于OFDM的跳频通信系统具有良好的有效性和可靠性。69353

毕业论文关键词  QPSK  OFDM  跳频通信  Simulink仿真

毕业设计说明书外文摘要

Title    The Frequency-Hopped Communication System Based  

         on OFDM in Wireless Communication Network          

Abstract

With the rapid development of the wireless communication network, the security problem in the wireless network has been concerned by people. The combination of orthogonal frequency pision multiplexing(OFDM) technology and frequency-hopped (FH) communication technology can effectively improve the security of the network,  and can improve the transmission rate of the communication. The paper analyzes the principles of OFDM multicarrier modulation technology and frequency-hopped communication technology; designs an OFDM frequency-hopped communication system model based on QPSK modulation;simulates the communication system model using Simulink simulation platform. The simulation results show that the frequency-hopped communication system based on OFDM has good validity and reliability.

Keywords  QPSK  OFDM  Frequency hopping communication  Simulink

目   次

1  引言 ………………………………………………………………………………………… 1

1.1  课题背景和意义 ………………………………………………………………………… 1

1.2  OFDM技术和跳频技术的发展现状 …………………………………………………… 2

1.3  本文工作内容安排 ……………………………………………………………………… 3

2  OFDM跳频系统方案设计 ………………………………………………………………… 5

2.1  OFDM系统基本原理 …………………………………………………………………… 5

2.2  通信系统中跳频通信的方法 …………………………………………………………… 8

2.3  OFDM跳频通信系统结合的方法设计 ……………………………………………… 11

2.4  仿真平台的选择 ……………………………………………………………………… 13