Adaptive predictive power control for the uplink channel in DS-CDMA cellular systems |
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Authors: | Aldajani M.A. Sayed A.H. |
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Affiliation: | King Fahd Univ. of Pet. & Miner.s, Dhahran, Saudi Arabia; |
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Abstract: | In this paper, we analyze the conventional closed-loop power-control system. We explain that the system behaves essentially as a companded delta modulator and then derive an expression for the power-control error in terms of the channel fading, which suggests methods for reducing the error variance. This is achieved by using a prediction technique for estimating the channel-power fading profile. The prediction module is combined with several proposed schemes for closed-loop power control. The resulting architectures are shown to result in improved performance in simulations. |
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