Digital communication techniques

Abstract

In the past few years analogue communication systems have been gradually replaced by modern digital systems which proved to be the best communication forms. The aim of the project is to study and design different digital communication systems, followed by the implementation of some models for laboratory demonstration. Three digital modulation techniques, namely, Frequency shift keying (FSK), Binary phase shift keying (BPSK) and Quadraturephase shift keying (QPSK) are implemented to transmit real time audio signal. Signal reconstruction is achieved after demodulation.