2、学《信号分析处理》课程设计说明书AbstractIn the simulation of communication systems, generated by the analog source carrying amessage through the sensor into electrical signals. Analog baseband signal after the modul--ation of the low pass spectrum to carrier frequency to adapt to the channel,
3、 the final reducti--on 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 cour
4、se on comm--unication theory knowledge,the modulation and demodulation of FM signal, as well asthe design and simulation with SIMULINK. Firstly, sine wave signal generator is simple asthe source, simulation FM modulation anddemodulation principle of analogue signals. Then, usi
5、ng the song as the source.Keywords:modulationanddemodulation;FM;MATLAB;SIMULINKsimulation31武汉理工大学《信号分析处理》课程设计说明书1FM调制与解调原理1.1模拟通信系统的简介通信的目的是传输信息。通信系统的作用就是将信息从信息源发送到一个或多个目的地。通信系统对信号进行两种基本变换:第一、要把发送的消息要变换成原始电信号。第二、将原始电信号调制到频率较高的载频上,使其频带适合信道的传输。调制前和解调后的信号称为基带信号,已调信号也称为频带信号。对于任何一个