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Spectral Efficiency of CDMA Downlink Cellular Networks with Matched Filter

EURASIP Journal on Wireless Communications and Networking volume 2006, Article number: 074081 (2006) Cite this article

Abstract

In this contribution, the performance of a downlink code division multiple access (CDMA) system with orthogonal spreading and multicell interference is analyzed. A useful framework is provided in order to determine the optimal base station coverage for wireless frequency selective channels with dense networks where each user is equipped with a matched filter. Using asymptotic arguments, explicit expressions of the spectral efficiency are obtained and provide a simple expression of the network spectral efficiency based only on a few meaningful parameters. Contrarily to a common misconception which asserts that to increase spectral efficiency in a CDMA network, one has to increase the number of cells, we show that, depending on the path loss and the fading channel statistics, the code orthogonal gain (due to the synchronization of all the users at the base station) can compensate and even compete in some cases with the drawbacks due to intercell interference. The results are especially realistic and useful for the design of dense networks.

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Authors and Affiliations

  1. MAESTRO, INRIA Sophia Antipolis, 2004 Route des Lucioles, Sophia Antipolis, 06902, France

    Nicolas Bonneau & Eitan Altman

  2. Mobile Communications Group, Institut Eurécom, 2229 Route des Crêtes, B.P. 193, Sophia Antipolis, 06904, France

    Mérouane Debbah

Authors
  1. Nicolas Bonneau
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  2. Mérouane Debbah
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  3. Eitan Altman
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Correspondence to Mérouane Debbah.

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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License ( https://creativecommons.org/licenses/by/2.0 ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Bonneau, N., Debbah, M. & Altman, E. Spectral Efficiency of CDMA Downlink Cellular Networks with Matched Filter. J Wireless Com Network 2006, 074081 (2006). https://doi.org/10.1155/WCN/2006/74081

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