Publication: On the spectral efficiency of CDMA downlink cellular mobile networks
Issued Date
2008-11-01
Resource Type
ISSN
15361276
Other identifier(s)
2-s2.0-57149133951
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Mahidol University
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SCOPUS
Bibliographic Citation
IEEE Transactions on Wireless Communications. Vol.7, No.11 (2008), 4133-4141
Suggested Citation
Khairi Ashour Hamdi, Pongsatorn Sedtheetorn On the spectral efficiency of CDMA downlink cellular mobile networks. IEEE Transactions on Wireless Communications. Vol.7, No.11 (2008), 4133-4141. doi:10.1109/T-WC.2008.070990 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/19125
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Title
On the spectral efficiency of CDMA downlink cellular mobile networks
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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.