Title: Multi-carrier coded division multiple access multiplexing against multi-path fading

Authors: Haider D. Albonda; Sufian Yousef

Addresses: Anglia Ruskin University, Bishop Hall Lane, CM1 1SQ, Chelmsford, UK ' Anglia Ruskin University, Marconi Building 317, Bishop Hall Lane, CM1 1SQ, Chelmsford, UK

Abstract: In recent years, multi-carrier techniques such as multi-carrier code division multiple access (CDMA) schemes have become popular in wireless communications over multipath fading channels. The MCCDMA used to improve security, data transmission rate and to minimise inter symbol interference (ISI). CDMA was suffering from multipath fading which affects its performance. In this research, the performance of multi-carrier code division multiple access (MC-CDMA) system is studied and evaluated, virtual frequency and phase synchronisation algorithm for the sub-carrier is proposed to reduce the BER of MC-CDMA. The simulation have been done using MATLAB programme, the results indicate that significant improvement in the system achieved under AWGN and Rayleigh fading channels using BPSK modulation. Increasing digital modulation orders and power have led to reduction in the BER for the system.

Keywords: MC-CDMA; binary phase shift key; QPSK; additive white Gaussian noise; AWGN; multi-carrier CDMA; coded division multiple access; multiplexing; multi-path fading; security; virtual frequency; phase synchronisation; bit error rate; BER; simulation; Rayleigh fading channels; BPSK modulation.

DOI: 10.1504/IJESDF.2014.063111

International Journal of Electronic Security and Digital Forensics, 2014 Vol.6 No.2, pp.140 - 146

Received: 15 Jan 2014
Accepted: 04 Feb 2014
Published online: 30 Jul 2014 *

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