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Title: On the spectral efficiency of CDMA downlink cellular mobile networks
Authors: Khairi Ashour Hamdi
Pongsatorn Sedtheetorn
University of Manchester
Mahidol University
Keywords: Computer Science;Engineering;Mathematics
Issue Date: 1-Nov-2008
Citation: IEEE Transactions on Wireless Communications. Vol.7, No.11 (2008), 4133-4141
Abstract: A new accurate mathematical analysis is presented for the efficient computation of the spectral efficiency of CDMA downlink wireless communication systems in the presence of multipath Rayleigh fading and log-normal shadowing. A new explicit expression is derived for the spectral efficiency, which is based on an accurate interference model that accounts for both intra-cell and inter-cell interferences. This is used to investigate the performance of downlink CDMA in different multipath delay profiles. The numerical results has shown that the loss of orthogonality deteriorates the spectral efficiency significantly at high signal-to-noise ratios (SNR) levels. On the other hand, the diversity gain will compensate the loss of orthogonality at low SNR levels. © 2008 IEEE.
ISSN: 15361276
Appears in Collections:Scopus 2006-2010

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