文档介绍：郑州大学西亚斯国际学院
本科毕业论文(设计)
题目调频信号的调制与解调
指导教师职称教授
学生姓名学号
专业通信工程(无线移动通信方向)
班级无线移动通信一班
院(系) 电子信息工程学院
完成时间 2013年4月30日
调频信号的调制与解调
摘要
在模拟通信系统中,由模拟信源产生的携带有信息的消息经过传感器转换成电信号。模拟基带信号在经过调制将低通频谱搬移到载波频率上适应信道,最终解调还原成电信号。本文应用了频率调制法产生调制解调信号。本论文中主要通过对SIMULINK工具箱的学习和使用,利用其丰富的模板以及本科对通信原理知识的掌握,完成了FM信号的调制与解调,作为延伸,还进行歌曲作为信源的FM调制与解调过程,以及用SIMULINK进行设计和仿真。首先利用简单的正玄波信号发生器作为信源,对模拟信号进行FM调制解调原理的仿真。然后,利用歌曲作为信源,进行FM调制解调过程,在输出端播放出音乐,并且调整参数直到仿真波形输出,对信号还进行了PCM量化编码过程,观察效果,最终对设计结论进行总结。
关键词通信系统/FM调制解调/SIMULINK
FM signal modulation and demodulation
ABSTRACT
In the simulation munication systems, generated by the analog source carrying a message through the sensor into electrical signals. Analog baseband signal after the modulation of the low pass spectrum to carrier frequency to adapt to the channel, the final reduction into electrical signal demodulation. This paper applied the frequency modulation method to generate the signal modulation and demodulation. Mainly through the study and use of SIMULINK toolbox in this thesis, with its rich template and undergraduate course munication theory knowledge, the modulation and demodulation of FM signal, as the extension, also performed songs as FM modulation and demodulation process source, as well as the design and simulation with SIMULINK. Firstly, sine wave signal generator is simple as the source, simulation FM modulation and demodulation principle of analogue signals. Then, using the song as the source, FM modulation and demodulation process, play music in the output, and adjusting the parameters until the simulation waveform output, the signal has also carried on the PCM quantization coding process, observe the effect, the final design result are summarized.
munication system,FM modulation& demodulation ,Simulink
目录
摘要 I
ABSTRACT II
1 绪论 1
2 通信系统 2
通信系统的一般模型 2
模拟通信系统 3
3 FM调制与解调原理 3
4 FM调制器和解调器的设计与仿真 6
仿真软件介绍 6
FM调制器的设计与仿真 7
FM解调器的设计与仿真 9
调制与解调的完整过程 12
5 语音信号的FM调制与解调的设计与仿真 14
PCM