目录

1 技术要求 .......................................................................................................................................................... 1

2 基本原理 ...................................................................................................................................................... 1

2.1 2DPSK信号原理 ................................................................................................................................... 1

2.2 2DPSK信号的调制原理 ....................................................................................................................... 2

2.2.1模拟调制法 ............................................................................................................................... 2

2.2.2键控调制法 ............................................................................................................................... 2

2.3 2DPSK信号的解调原理 ....................................................................................................................... 3

2.3.1 2DPSK相干解调(极性比较法)加码反换法 ....................................................................... 3

2.3.2 2DPSK差分相干解调法(相位比较法) ............................................................................... 3

3 建立模型描述 .............................................................................................................................................. 4

3.1 System View仿真 ............................................................................................................................... 4

3.1.1差分和逆差分变换模型 ........................................................................................................... 4

3.1.2 信号调制模型 .......................................................................................................................... 4

3.1.3 信道模型 .................................................................................................................................. 4

3.1.4带通滤波器和低通滤波器的模型 ........................................................................................... 5

3.1.5 抽样判决器模型 ...................................................................................................................... 5

3.2 Matlab Simulink仿真 ....................................................................................................................... 6

3.2.1差分和逆差分变换模型 ........................................................................................................... 6

3.2.2 信号调制模型 .......................................................................................................................... 6

3.2.3 信道模型 .................................................................................................................................. 7

3.2.4带通滤波器和低通滤波器的模型 ........................................................................................... 7

3.2.5 抽样判决器模型 ...................................................................................................................... 7

3.3 Matlab程序仿真 ................................................................................................................................. 8

3.3.1基带信号产生 ........................................................................................................................... 8

3.3.2 差分和逆差分变换模型 .......................................................................................................... 8

3.3.3信号调制模型 ........................................................................................................................... 8

3.3.4 信道模型 .................................................................................................................................. 8

3.3.5带通滤波器和低通滤波器的模型 ........................................................................................... 8

3.3.6 抽样判决器模型 ...................................................................................................................... 9

4 模块功能分析或源程序代码 ...................................................................................................................... 9

4.1 System View仿真 ............................................................................................................................... 9

4.1.1调制模块 ................................................................................................................................... 9

4.1.2 解调模块 .................................................................................................................................. 9

4.2 Matlab Simulink仿真 ..................................................................................................................... 11

4.2.1调制模块 ................................................................................................................................. 11

4.2.2解调模块 ................................................................................................................................. 13

4.3 Matlab 程序仿真 .............................................................................................................................. 17

5 调试过程及结论 ........................................................................................................................................ 22

5.1 Systen View仿真调试 ..................................................................................................................... 22

5.1.1 系统搭建 ................................................................................................................................ 22

5.1.2 仿真波形 ................................................................................................................................ 23

5.1.3 系统分析 ................................................................................................................................ 25

5.2 Matlab Simulink仿真调试 ............................................................................................................. 26