Bit Error Rate Performance Analysis on Modulation Techniques of Wideband Code Division Multiple Access

TL;DR

This paper analyzes the performance of QPSK and 16-QAM modulation schemes in W-CDMA systems under AWGN and Rayleigh fading, using MATLAB simulations to evaluate BER and SNR for optimal data transmission.

Contribution

It provides a comparative performance analysis of QPSK and 16-QAM modulations in W-CDMA systems under different channel conditions, guiding modulation choice for better efficiency.

Findings

QPSK and 16-QAM performance varies with channel conditions

16-QAM offers higher data rates but is more susceptible to noise

QPSK provides more reliable communication in fading environments

Abstract

In the beginning of 21st century there has been a dramatic shift in the market dynamics of telecommunication services. The transmission from base station to mobile or downlink transmission using M-ary Quadrature Amplitude modulation (QAM) and Quadrature phase shift keying (QPSK) modulation schemes are considered in Wideband-Code Division Multiple Access (W-CDMA) system. We have done the performance analysis of these modulation techniques when the system is subjected to Additive White Gaussian Noise (AWGN) and multipath Rayleigh fading are considered in the channel. The research has been performed by using MATLAB 7.6 for simulation and evaluation of Bit Error Rate (BER) and Signal-To-Noise Ratio (SNR) for W-CDMA system models. It is shows that the analysis of Quadrature phases shift key and 16-ary Quadrature Amplitude modulations which are being used in wideband code division multiple access system, Therefore, the system could go for more suitable modulation technique to suit the channel quality, thus we can deliver the optimum and efficient data rate to mobile terminal.