BER Analysis of Digital Modulation Schemes using LabVIEW

Abstract

Since the last few decades there has been an abrupt rise in technology and all the communication devices of the new generation mostly rely on digital transmission of information. Thus, it has become necessary to give better and efficient services to users by employing better digital modulation techniques. This paper analyses the Bit Error Rate (BER) performance of different digital modulation schemes such as Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK) and Quadrature Amplitude Modulation (QAM) using LabVIEW. The Additive White Gaussian Noise (AWGN) channel is used for analysis and modulation. As LabVIEW is a graphical programming environment it gives good visualization of the results and it also allows us to design systems in an intuitive block based manner in short time as compared to other commonly used text based programming languages. Thus, it is concluded from the simulation results that BPSK outperforms QPSK and QAM in terms of BER.