Design and Simulation of parallel CDMA System Based on 3D-Hadamard Transform
Keywords:
DS-CDMA, 3-D Hadamard, 2-D Spreading Codes, 2-D CDMA, 2-D ISI ChannelAbstract
Future wireless systems aim to provide higher transmission data rates, improved spectral efficiency and greater capacity. In this paper a spectral efficient two dimensional (2-D) parallel code division multiple access (CDMA) system is proposed for generating and transmitting (2-D CDMA) symbols through 2-D Inter-Symbol Interference (ISI) channel to increase the transmission speed. The 3D-Hadamard matrix is used to generate the 2-D spreading codes required to spread the two-dimensional data for each user row wise and column wise. The quadrature amplitude modulation (QAM) is used as a data mapping technique due to the increased spectral efficiency offered. The new structure simulated using MATLAB and a comparison of performance for serial one-dimensional (1-D) CDMA and parallel (2-D) CDMA is made under Additive White Gaussian Noise (AWGN), flat fading and multi-path selective fading channels conditions. It is found that 2-D CDMA has better speed and performance than serial 1-D CDMA.
Downloads
References
Da-shan Shiu, “Wireless Communication Using Dual Antenna Arrays” Kluwer Academic Publishers, 2002.
S.M. Alamouti, “A simple transmit diversity technique for wireless communications”, IEEE J. Select Area Comm., 16, 1451–1458, 1998. DOI: https://doi.org/10.1109/49.730453
D.G. Rahn, M.S. Cavin, M. Toner,” A fully integrated multiband MIMO WLAN transceiver RFIC”, IEEE J. Solid-State Circuits 40, 1629–1641, (2005). DOI: https://doi.org/10.1109/JSSC.2005.852419
M. Guillaud, A. Burg, L. Mailaender, B. Haller, M. Rupp, and E. Beck, “From Basic Concept to Real-Time Implementation: Prototyping WCDMA Downlink Receiver Algorithms – A Case Study” , 34th Asilomar Conf. on Signals, Systems, and Computers, Oct. 29 – Nov. 1- 2000.
A. H. Kattoush, W.Al-Jawhar, S. M. Abbas and Ali T. Shaheen, “A high performance parallel Radon based OFDM transceiver design and simulation”, Digital signal processing, Elsevier, USA, Vol. 18 No. 6, (907-918), November 2008. DOI: https://doi.org/10.1016/j.dsp.2008.04.008
M. Ali Abu-Rgheff, “Introduction to CDMA Wireless Communications”, Elsevier Ltd. 2007 DOI: https://doi.org/10.1016/B978-075065252-0.50002-8
H. Hwa Chen ,”The Next Generation CDMA Technologies “,John Wiley & Sons Ltd, 2007. DOI: https://doi.org/10.1002/9780470022962
Saad Nihad Adbul-Majeed,” Multi-Carrier CDMA using multiwavelet transform” Thesis, Electrical Eng. Dept.,College of Eng.,Baghdad University,2006.
Vanessa Testoni and Max H. M. Costa, “3D-Hadamard Coefficients Sequency Scan Order for a Fast Embedded Color Video Codec”, the 1st International Conference on Signal Processing and Communication Systems, Gold Coast, Australia, December 2007.
Sarah Spence Adams, Matthew Crawford , ” Multilevel and multidimensional Hadamard matrices “ , Springer Science+Business Media, December 2008.
P.S. Kumar, S. Roy, “Two-dimensional equalization: Theory and application to high density magnetic recording”, IEEE Trans. Commun. 42, 386-395, (1994). DOI: https://doi.org/10.1109/TCOMM.1994.577065
A.D. Wyner, “Shanon-theoretic approach to Gaussian cellular multiple-access channel” , IEEE Trans. Inform. Theory 40,1713-1727, (1994). DOI: https://doi.org/10.1109/18.340450
N. Singla, J.A. O’sullivan, R.S.Indeck , “Iterative decoding and equalization for 2-D recording channels”, IEEE Trans. Magn. 38, 2328-2330, (2002). DOI: https://doi.org/10.1109/TMAG.2002.801894
Published
How to Cite
Issue
Section
Copyright (c) 2013 Ali T. Shaheen
This work is licensed under a Creative Commons Attribution 4.0 International License.
