【正文】 天津 天獅學院 畢業(yè)實踐報告 題目： 基于 System View 的模擬通信系統(tǒng)的仿真 二級學院 _____電子計算機 學院 專 業(yè) __ 通 信技術(shù) 學生姓名 ___戴曉辰 指導教師 ________沈振惠 __ 2020 年 5 月 31 日摘 要 通信系統(tǒng)是用于完成信息傳輸過程的技術(shù)系統(tǒng)的總稱。現(xiàn)代通信系統(tǒng)分為無線通信和有線通信，它在各個領域發(fā)揮 越來越重要的作用。而通信系統(tǒng)的設計需要先進行模擬仿真，以提升系統(tǒng)的可用性。 動態(tài)仿真軟件 System View， 利用它可以構(gòu)造各種復雜的模擬、數(shù)字、數(shù)?；旌?通信系統(tǒng)和各種多速率系統(tǒng)，也可用于各種線性或非線性控制系統(tǒng)的設計和仿真。 它是 一個強有力的動態(tài)系統(tǒng)分析工具， 可進行包括數(shù)字信號處理（ DSP）系統(tǒng)、模擬與數(shù)字通信系統(tǒng)、信號處理系統(tǒng)和控制系統(tǒng)的仿真分析 。 System View 以模塊化和交互式的界面，在 Windows 窗口環(huán)境下，為用戶提供了一個嵌入式的分析引擎。 System View 是一個用于電路與通信系統(tǒng)設 計、仿真的動態(tài)分析工具，它實現(xiàn)了功能的軟件化，避開了復雜的硬件搭建，在不具備先進儀器的條件下同樣也能完成復雜的通信系統(tǒng)設計與仿真本文利用 System view 軟件設計模擬調(diào)制和解調(diào)電路，通過分析其輸入輸出波形驗證所設計電路的正確性 。 本論文內(nèi)容主要包括通信系統(tǒng)的概述、模擬通信系統(tǒng)的基本內(nèi)容以及用 System View 仿真軟件來實現(xiàn)模擬通信系統(tǒng)的仿真。模擬通信系統(tǒng)的基本內(nèi)容主要有通信系統(tǒng)的基本模型，模擬信號的線性調(diào)制（ AM、 DSB、 SSB）與解調(diào)，非線性調(diào)制（ FM、NBFM）與解調(diào)，本論文同時也對仿真軟件（ System View）簡單介紹，同時用仿真軟件實現(xiàn)上述模擬通信系統(tǒng)的仿真。 關(guān)鍵詞 ： System View 通信系統(tǒng) 調(diào)制解調(diào) 仿真 Abstract Communication system is the general appellation of plete the process of information transmission system. Modern munication system is divided into wireless munication and wired munication. It plays an important role in all fields. The munication system design needs to make the simulation first, in order to improve the availability of the system. Dynamic Simulation Software System View, it can be used for constructing a variety of plex analog, digital, mixed munication systems and various multirate system, and also can be used for a variety of linear or nonlinear control system design and simulation. It is a powerful tool for dynamic system analysis, including digital signal processing (DSP), analog and digital munication systems, and signal processing system and control system simulation analysis. According to a modular and interactive interface, under the Window in the Windows environment, System View provides users with an embedded analytical engine. System View is a tool of programming for circuit and munication system design, simulation of dynamic analysis. It avoids the plex hardware structures. On the conditions that don’t have the advanced equipment, it also can plete a plex munication system design and simulation. True Software Design System view this thesis, analog modulation and demodulation circuit. By analyzing the input and output waveforms of the correctness of the circuit design. The thesis mainly including an overview of munications systems, analog munications system and the basic contents and use System View, simulation software simulation of munication systems to achieve the simulation. Analog munication systems are the main elements of the basic munication system model, the linear analog signal modulation (AM,DSB,SSB) and demodulator, nonlinear modulation(FM,NBFM) and demodulator, the thesis also give a brief introduction on the simulation software(System View), while using simulation software to achieve the simulation of the munications system simulation. Keywords ： System View Communication Systems Modulation Demodulation Simulation 目 錄 一、緒論 ............................................................... 1 模擬通信系統(tǒng)概述 ............................................... 1 模擬信號調(diào)制解調(diào) ............................................... 1 調(diào)制的基本概念 ................................................. 2 System View 系統(tǒng)簡介 ............................................ 3 System View 軟件介紹 .............................................. 3 System View 仿真系統(tǒng)的特點 ........................................ 3 二、模擬幅度調(diào)制系統(tǒng) ................................................... 5 幅度調(diào)制基本概念 ............................................... 5 常規(guī)雙邊帶調(diào)幅（ AM） ........................................... 5 AM 的調(diào)制與解調(diào)原理 ............................................... 5 仿真模型及結(jié)果波形圖 ............................................. 7 雙邊帶調(diào)幅（ DSB） .............................................. 10 DSB 的調(diào)