摘 要

目前，現(xiàn)代計算機科技發(fā)展越來越快，與此同時，新一代的可視化的仿真軟件也應(yīng)運而生。這些仿真軟件在通信領(lǐng)域發(fā)揮了舉足輕重的作用。不僅讓通信系統(tǒng)設(shè)計和開發(fā)過程變得更為直觀，而且也變得更方便。這就大大地促進了通信系統(tǒng)開發(fā)技術(shù)的速度。仿真軟件具有廣泛的適應(yīng)性和很好的靈活性，為整個社會研究通信系統(tǒng)性能做出來突出貢獻。

本次設(shè)計的主要探討方向是通信系統(tǒng)中的關(guān)鍵技術(shù)，即模擬調(diào)制系統(tǒng)的調(diào)制技術(shù)和數(shù)字基帶傳輸系統(tǒng)的調(diào)制技術(shù)。模擬調(diào)制主要研究模擬調(diào)制系統(tǒng)的分類、模擬調(diào)制系統(tǒng)的組成、模擬信號的傳輸方式。數(shù)字基帶傳輸系統(tǒng)主要研究常用的傳輸碼型、眼圖、碼間串擾、噪聲干擾、數(shù)字基帶傳輸系統(tǒng)的組成。本次設(shè)計重點放在模擬調(diào)制及數(shù)字基帶傳輸?shù)腗atlab仿真分析，通過仿真分析，進一步理解并鞏固理論知識。這樣更便于模擬調(diào)制系統(tǒng)和數(shù)字基帶傳輸系統(tǒng)在實際生活中的應(yīng)用。

理論知識來源于實踐并運用于實踐。本次設(shè)計充分利用Matlab仿真軟件的強大功能，結(jié)合理論知識建立了通信系統(tǒng)的仿真模型。

關(guān)鍵詞：模擬調(diào)制系統(tǒng)；基帶傳輸系統(tǒng)；Matlab；仿真技術(shù)

                                   Abstract

At present, the development of modern computer technology is more and more fast, at the same time, a new generation of visual simulation software also arises at the historic moment. The simulation software has played a decisive role in the field of communications. Not only the communication system design and development process become more intuitive, but also become more convenient. This will greatly promote the speed of the communication system development technology. Simulation software has extensive adaptability and good flexibility, for the society as a whole research on communication system performance made outstanding contributions.

Mainly discusses the direction of this design is the key technology in communication system, namely the analogue modulation system modulation technique and modulation technique of digital baseband transmission system. Analog modulation mainly studies the classification of the analogue modulation system, the composition of analog modulation system, the analog signal transmission way. Digital baseband transmission system is the main research of commonly used transmission type, eye diagram, intersymbol interference and noise interference, the composition of digital baseband transmission system. The design emphasis is placed on the Matlab simulation modulation and digital baseband transmission simulation analysis, through the simulation analysis, further understanding and consolidate the theoretical knowledge. It is easier to simulate modulation system and digital baseband transmission system applied in the practical life.

The theoretical knowledge comes from practice and applied to practice. This design make full use of the powerful features of the Matlab simulation software, combined with theoretical knowledge communication system simulation model is established.

Keywords：analog modulation system; base band transmission system; Matlab; simulation technology

目 錄

前 言 1

第1章 模擬調(diào)制系統(tǒng)的設(shè)計 2

1.1  幅度調(diào)制簡介 2

1.1.1 模擬調(diào)制的分類與特點 2

1.1.2 AM調(diào)制原理 2

第2章 數(shù)字基帶傳輸系統(tǒng)的設(shè)計 8

1.1 數(shù)字基帶傳輸系統(tǒng)簡介 8

1.2 數(shù)字基帶信號傳輸系統(tǒng)的組成原理 8

1.3 基帶傳輸?shù)某Ｓ么a型 9

1.3.1 幾種常用的傳輸碼型 9

1.4 碼間串擾簡介 10

1.4.1 消除碼間串擾的基本思想 10

1.5 眼圖 11

1.5.1 眼圖簡介 11

1.6 數(shù)字基帶傳輸系統(tǒng)仿真設(shè)計與分析 11

1.6.1  基帶系統(tǒng)仿真設(shè)計與分析 11

致 謝 17

參考文獻 18