The Design And Realization Of Communication Signals Simulation Flat

In the design and test of the communication system,communicating signal simulation possesses many advantages,such as good flexibilities,economy e.g.And it takes great convenience to the research of communication system.The target of the communication system flat is modeling and calculating to modulation and demodulation of seven kinds of signals:AM,FM,SSB,2ASK,2FSK,2PSK,2QPSK.It realizes graphics protraction of time and frequency domain in every time period. Communicating simulation considers the effects of modulation mode,noise level and modulating parameters to communication,modeling calculation,creation of the four time periods waveform and spectrum deeply and widely.It's convenient to display intuitionisticly the effects of parameters to modulation modes.This paper mainly discussed two aspects:constituting communication flat,simulating modulation and demodulation of seven kinds of signals based on MATLAB.