PHYSICAL SIMULATION OF DIGITAL MICROWAVE CHANNELS WITH A BINARY AMPLITUDE MANIPULATED SIGNAL IN MATLAB

Abstract

The article investigates the basic types of signals with amplitude shift keying (ASK). As a physical model, a functional diagram of a digital communication system with amplitude shift keying signal, the primary block of which is an information source both analog and digital, is given. The developed programs in the Matlab environment visually represent the graphs of the modulated signal and the modulated radio signal for OOK and BASK modulations both without interference and when exposed to white Gaussian noise. The efficiency of communication systems is most fully measured by spectral efficiency. The spectral characteristics of signals with ASK modulation are obtained using the fast Fourier transform in Matlab. The noise immunity of receiving signals with amplitude shift keying is considered as a probability of bit error depending on the signal to noise ratio for OOK and BASK modulations, which allows us to analyze these graphs.