Performance analysis of Multi Carrier CDMA System with DCT-OFDM

International Journal of Communication and Media Science

© 2014 by SSRG - IJCMS Journal

Volume 1 Issue 2

Year of Publication : 2014

Authors : S.Karthikeyan , P.Ganesh Kumar and S.Sasikumar

10.14445/2349641X/IJCMS-V1I2P101

How to Cite?

S.Karthikeyan , P.Ganesh Kumar and S.Sasikumar, "Performance analysis of Multi Carrier CDMA System with DCT-OFDM," SSRG International Journal of Communication and Media Science, vol. 1,  no. 2, pp. 1-6, 2014. Crossref, https://doi.org/10.14445/2349641X/IJCMS-V1I2P101

Abstract:

In this paper, a precise method for calculating the bit-error rate (BER) of a discrete cosine transform (DCT)-based orthogonal frequency-division multiplexing (OFDM) system on additive white Gaussian noise (AWGN) channels for a Multicarrier-CDMA (MC-CDMA) is derived and its BER performance will be compared with the FFT based MC-CDMA. These accurate results are used to examine and compare the BER performance of a DCT-MC-CDMA system and the conventional Fast Fourier transform (FFT)-based MC-CDMA system in an AWGN environment. Some signaling formats, such as phase-shift keying (PSK),binary phase-shift keying(BPSK), Quadrature Phase shift keying(QPSK) and 16-ary quadrature amplitude modulation (QAM), Differential Phase Shift Keying(DPSK) modulation are considered. As DCT requires less computation than FFT we can reduce MC-CDMA design complexity by exploiting DCT characteristics.

Keywords:

Bit-error probability (BEP) analysis, discrete cosine transform (DCT), fading channels, intercarrier interference (ICI), orthogonal frequency-division multiplexing (OFDM).

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