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Journal of the Nigerian Association of Mathematical Physics

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Capacity and coverage of power controlled CDMA cellular systems

J Isabona, B Asuquo, M Ekpenyong, M Ekpenyong

Abstract




Coverage and capacity are among the ambitious challenges to be met by the third generation (3G) systems for successful deployment of its services to both residential and commercial subscribers. This paper reports on the performance study of CDMA systems in relation to an optimum step-regulated SNR-based transmitted power. We derive the system model and present a computer simulation to optimize the transmitted power for each user and maintain the required λbN0 (signal-to-noise ratio) for satisfactory call quality by achieving a minimal λbN0 for every user with an acceptable channel performance. We observe from the simulation that SNR based power control with updating step-size of 0.8dB provides acceptable system availability and stability.

JONAMP Vol. 11 2007: pp. 605-614



http://dx.doi.org/10.4314/jonamp.v11i1.40264
AJOL African Journals Online