Title: Performance analysis of Gaussian approximation in wide band code division multiple access system over various fading channels

Authors: Parveen Singla; Jyoti Saxena

Addresses: Department of Electronics and Communication Engineering, Panipat Institute of Engineering and Technology, Punjab Technical University, Samalkha, Panipat, Jalandhar, India ' Department of Electronics and Communication Engineering, Giani Zail Singh Punjab Technical University Campus, Bathinda, India

Abstract: Third-generation based wideband code division multiple access (WCDMA) systems have been designed for providing multimedia services. But multipath fading and multi-access interference puts a limit on overall system performance. We thus need to analyse the modelling and behaviour of WCDMA system to evaluate system performance. Here, the behaviour of WCDMA system is analysed by Gaussian approximation in which interference and channel noise are generated by the approximations of mean and variance of interferer power. Different kind of fading distributions like Weibull, Rayleigh, Rician and Nakagami is applied to Gaussian approximated WCDMA system to generate faded signal. Simulated results are obtained with BER vs. Eb/no for with and without fading, different average fading power, different number of users and different processing gain. Results show that inclusion of fading, increase in fading power and number of user increases the BER. It only decreases as we increase the system processing gain.

Keywords: wideband CDMA; code division multiple access; WCDMA; Gaussian approximation; bit error rate; BER; fading channels; fading distributions; Rayleigh; Rician; Weibull; Nakagami; system modelling; multi-access interference; MAI; performance evaluation; multimedia services; modelling; simulation.

DOI: 10.1504/IJSCC.2016.075118

International Journal of Systems, Control and Communications, 2016 Vol.7 No.1, pp.45 - 67

Received: 29 Apr 2015
Accepted: 08 Aug 2015
Published online: 03 Mar 2016 *

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