毕业论文：GMSK调制与解调算法研究.doc

PAGE  GMSK调制与解调算法研究 PAGE 23 摘要：随着现代通信技术的发展，移动通信技术得到快速发展，许多优秀的调制技术应运而生，其中高斯最小频移键控（GMSK）技术是无线通信中比较突出的一种二进制调制方法，它具有良好的功率谱特性和较好的抗干扰性能，特别适用于无线通信和卫星通信，目前，很多通信标准都采用了GMSK技术，例如，GSM，DECT等。本文首先介绍了MSK的一般原理，接着对GMSK的调制原理和几种调制方法进行了阐述，然后，重点研究了GMSK的几种差分解调方法并进行了比较，最后用Matlab软件进行仿真及结果分析。 关键词：高斯最小频移键控；调制；差分解调；Matlab The study of GMSK modulation and demodulation algorithm Abstract：Along with the development of the communication technology, the mobile communication technology has been developing rapidly. A lot of excellent modulation technology has emerged as the times require, Gaussian Minimum frequency shift keying（GMSK）is one of the most outstanding technology in radio communication. It is especially used in radio and satellite communication for its nice spectrum characteristic and anti-jamming capability. At present , many communication system has employed the GMSK, for instance, the GSM, DECT. In this paper , the MSK which is the base of GMSK was introduced firstly, and then the modulation principle and methods of GMSK was analyzed, and the several differentially demodulation methods of GMSK was studied and compared emphatically, Finally using Matlab software simulate and results analysis. KeyWords：Gaussian Minimum Shift Keying；Modulation；Differential Demodulation；Matlab TOC \o 1-3 \h \u 目 录  HYPERLINK \l _Toc5717 第一章　绪 论  PAGEREF _Toc5717 1  HYPERLINK \l _Toc18193 1.1　选题的依据及意义  PAGEREF _Toc18193 1  HYPERLINK \l _Toc19444 1.2　国内外研究现状及发展趋势  PAGEREF _Toc19444 1  HYPERLINK \l _Toc8442 1.3　本课题研究内容  PAGEREF _Toc8442 1  HYPERLINK \l _Toc15369 第二章　MSK调制与解调原理  PAGEREF _Toc15369 2  HYPERLINK \l _Toc3303 2.1　MSK的基本原理  PAGEREF _Toc3303 2  HYPERLINK \l _Toc8922 2.2　MSK的调制解调原理  PAGEREF _Toc8922 4  HYPERLINK \l _Toc15181 第三章　GMSK调制  PAGEREF _Toc15181 6  HYPERLINK \l _Toc18241 3.1　GMSK调制的一般原理  PAGEREF _Toc18241 6  HYPERLINK \l _Toc14059 3.2　GMSK信号的产生  PAGEREF _Toc14059 8  HYPERLINK \l _Toc13068 第四章　GMSK解调  PAGEREF _Toc13