MSK调制解调系统及其性能的SystemView仿真设计.doc

` 摘要 最小移频键控（MSK）是二进制连续相位FSK的一种特殊形式。MSK信号具有恒定包络，在码元转换时刻相位保持连续，以载波为基准的信号相位在一个码元期间内线性地变换，信号功率谱在主瓣以外衰减较快，带外辐射小等特点。MSK属于连续相位调制技术，其调制指数h=1/2。本文将在讨论MSK信号的基础上，研究其调制和解调的理论基础，并提出调制和解调的实现方案，最终用SystemView仿真软件对其进行仿真，并将MSK与2FSK调制技术的性能加以对比，进而证明MSK调制技术的优越性。 关键字：最小移频键控 MSK SystemView动态仿真程序 连续相位调制 恒定包络 调制解调技术  Abstract The Minimum-Shift-Keying (MSK) waveform is a special type of a binary continuous phase FSK. MSK signal has a constant envelop, its phase keeps continuously at data conversion, the signal phase based on carrier change ±π2 linearly in a code-element time, the lobe out of the major lobe of its power spectra attenuates quickly, the radiation out of the band is less. MSK belongs to continuous phase modulation and its modulation index h=12 . In this paper, the theory of modulation and demodulation about MSK signal is studied on the basis of discussing it. Then, the implementation project of modulation and demodulation is referred. Finally, Keyword: Minimum-Shift-Keying MSK SystemView Dynamic Emluator Continuous Phase Modulation Constant Envelop Modulating and Demodulating Technology  目录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc168308714引 言 PAGEREF _Toc168308714 \h 4 HYPERLINK \l _Toc168308715第一章 MSK调制与解调原理 PAGEREF _Toc168308715 \h 5 HYPERLINK \l _Toc1683087161.1 MSK信号 PAGEREF _Toc168308716 \h 5 HYPERLINK \l _Toc1683087171.2 MSK的调制解调原理 PAGEREF _Toc168308717 \h 9 HYPERLINK \l _Toc1683087181.3 MSK的性能 PAGEREF _Toc168308718 \h 11 HYPERLINK \l _Toc168308719第二章 MSK实验系统的方针方案 PAGEREF _Toc168308719 \h 12 HYPERLINK \l _Toc1683087202.1 SystemView仿真平台的功能与使用简介 PAGEREF _Toc168308720 \h 12 HYPERLINK \l _Toc1683087212.1.1 概述 PAGEREF _Toc168308721 \h 12 HYPERLINK \l _Toc1683087222.1.2 设计、分析窗口简介 PAGEREF _Toc168308722 \h 15 HYPERLINK \l _Toc1683087232.2 实验系统的设计要求 PAGEREF _Toc168308723 \h 18 HYPERLINK \l _Toc1683087242.3 MSK的调制过程 PAGEREF _Toc168308724 \h 18 HYPERLINK \l _Toc1683087252