基于MATLAB的單邊帶調幅系統的建模仿真

目 錄

0 前言1

1 單邊帶調制與解調的基本概念2

1.1 單邊帶調制2

1.2 單邊帶解調2

1.3 希爾波特(Hilbert)變化2

2 單邊帶調制的特點及應用3

3 單邊帶調制與解調原理3

3.1 單邊帶調制原理3

3.2 單邊帶解調原理5

4 調制編程仿真及結果6

4.1 調制仿真程序6

4.2 仿真圖形7

5 解調編程仿真及結果7

5.1 解調仿真程序7

5.2 仿真圖形9

6 存在誤差時的仿真及結果9

6.1仿真程序9

6.2 仿真圖形11

7 結論11

參考文獻12

基于MATLAB的單邊帶調幅系統的建模仿真

華 偉

(河南大學民生學院，河南 開封，475004)

摘 要：

本文主要介紹了單邊帶調制與解調的基本原理，以及在對基本原理理解的基礎上進行建模仿真，使之能夠在計算機中實現各種條件下的調制與解調結果，直觀易懂且節約成本。雙邊帶調幅所產生的上下兩個邊帶包含的信息相同，所以只需要傳輸其中任意一個邊帶就可以了。將DSB信號中的某一個邊帶去除，所得的就是單邊帶調制信號。單邊帶調制的方法有濾波法和相移法。解調用相干解調。由仿真可以看出調制后的信號與原基帶信號的頻譜形狀沒有改變，僅是位置發生變化。相干解調后輸出時域波形與基帶信號波形近似，若本地載波與發送調制載波之間存在頻差和相位差，則解調輸出的時域波形將產生嚴重失真，但幅度譜失真不大。

關鍵詞：

單邊帶調制與解調；希爾波特變換；仿真

Matlab-based Modeling And Simulation Of Single-sideband Amplitude Modulation System

Hua Wei

(School of Minsheng, Henan University, Henan Kaifeng 475004, China)

Abstract:

This paper introduces the single-sideband modulation and demodulation of the basic principles, and understanding of basic principles based on modeling and simulation, to enable the computer to achieve a variety of conditions, the result of modulation and demodulation, intuitive easy to understand and cost savings. Produced by bilateral upper and lower with the two AM sidebands contain the same information, so only need to transfer any of them with an edge on it. The DSB signal in one sideband removed from the signal is single-sideband modulation. SSB modulation methods are filtering method and the phase shift method. Solution called coherent demodulation. Simulation can be seen from the modulated signal and the shape of primordial spectrum with a signal has not changed, only the location changed. Coherent demodulation of the output time domain waveform and the baseband signal waveform approximation, if the local carrier and send a modulated carrier frequency offset and phase difference between, then the demodulated output waveform in time domain will have a serious distortion, but not the amplitude spectrum distortion .

Key words:

SSB Mdulation And Dmodulation, Hilbert Change,

總結

以上是生活随笔為你收集整理的常规调幅系统matlab结果,基于MATLAB的单边带调幅系统的建模仿真.doc的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。