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通信原理

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数字通信原理实验手册

广州大学

计算机科学与网络工程学院

2020.05

目录
实验一 信号频谱分析实验.......................................................................................................5
一、实验目的.........................................................................................................................5
二、实验原理.........................................................................................................................5
1. 周期函数的傅立叶级数..................................................................................................5
2. 能量信号的傅里叶变换..................................................................................................6
3. 频谱图..............................................................................................................................7
4. 离散傅立叶变换(DFT)、快速傅里叶变换(FFT)..........................................................8
三、实验内容.......................................................................................................................10
1. 正余弦波的频谱分析....................................................................................................10
2. 周期性方波的频谱分析................................................................................................11
3. 周期性锯齿波、三角波的频谱分析............................................................................11
4. 矩形方波的频谱分析....................................................................................................11
实验二 数字基带传输实验.....................................................................................................12
一、实验目的.......................................................................................................................12
二、实验原理.......................................................................................................................12
1. 基带数字信号传输基本框架........................................................................................12
2. 常用的 Matlab 函数.......................................................................................................13
3. 发送滤波器的基本原理................................................................................................14
4. 脉冲成型的 Matlab 实现...............................................................................................16
三、实验内容.......................................................................................................................18
实验三 数字调制解调实验.....................................................................................................20
一、实验目的.......................................................................................................................20
二、实验原理.......................................................................................................................20
1. 2ASK 调制的基本原理.................................................................................................20
2. 2FSK 调制的基本原理..................................................................................................21
3. BPSK 调制的基本原理.................................................................................................22
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三、实验内容.......................................................................................................................23
1. 2ASK..............................................................................................................................23
2. 2FSK...............................................................................................................................23
3. BPSK..............................................................................................................................23
实验四 信源编码译码实验.....................................................................................................25
一、实验目的.......................................................................................................................25
二、实验原理.......................................................................................................................25
1. 信源编译码的目的........................................................................................................25
2. 信源编译码的基本原理................................................................................................25
3. PCM 的编码设计...........................................................................................................25
4. 非均匀量化 PCM 编码..................................................................................................26
三、实验内容.......................................................................................................................28
实验五 信道编码译码实验.....................................................................................................29
一、实验目的.......................................................................................................................29
二、实验原理.......................................................................................................................29
1. 信道编码通信系统基本模型........................................................................................29
2. 线性分组码的定义........................................................................................................29
3. [7,4]汉明码编码原理....................................................................................................29
4. [7,4]汉明码伴随式译码算法........................................................................................30
三、实验内容.......................................................................................................................31
广州大学学生实验报告...........................................................................................................32
一、实验目的与要求...........................................................................................................32
二、实验设备与平台...........................................................................................................32
三、实验原理.......................................................................................................................32
四、实验内容与步骤...........................................................................................................32
五、实验总结与心得...........................................................................................................33
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