A unified approach to power control for multiuser detectors

In this paper, a unified approach to power control is proposed for a large family of receivers which includes the matched filter, decorrelator, and minimum mean square error detectors as well as the individually and jointly optimal multiuser detectors. The proposed algorithm exploits the linear relationship that has been shown to exist between the transmit power and the output signal to noise plus interference ratio in large systems. Simulation is used to show the convergence of the proposed power control scheme and demonstrate its performance in finite-size systems. Keywords— Power control, multiuser detection, multiuser efficiency, large-system analysis.

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