New Insights into Optimal Discrete Rate Adaptation for Average Power Constrained Single and Multi-Node Systems

Khairnar, Parag S and Mehta, Neelesh B (2012) New Insights into Optimal Discrete Rate Adaptation for Average Power Constrained Single and Multi-Node Systems. In: IEEE Transactions on Wireless Communications, 11 (2). pp. 537-543.

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Abstract

The throughput-optimal discrete-rate adaptation policy, when nodes are subject to constraints on the average power and bit error rate, is governed by a power control parameter, for which a closed-form characterization has remained an open problem. The parameter is essential in determining the rate adaptation thresholds and the transmit rate and power at any time, and ensuring adherence to the power constraint. We derive novel insightful bounds and approximations that characterize the power control parameter and the throughput in closed-form. The results are comprehensive as they apply to the general class of Nakagami-m (m >= 1) fading channels, which includes Rayleigh fading, uncoded and coded modulation, and single and multi-node systems with selection. The results are appealing as they are provably tight in the asymptotic large average power regime, and are designed and verified to be accurate even for smaller average powers.

Item Type:	Journal Article
Publication:	IEEE Transactions on Wireless Communications
Publisher:	IEEE
Additional Information:	Copyright 2012 IEEE. Personal use of this material is permitted.However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords:	Fading channels;power adaptation;rate adaptation;selection; asymptotic analysis;bounds;approximations
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	04 Apr 2012 09:54
Last Modified:	04 Apr 2012 09:54
URI:	http://eprints.iisc.ac.in/id/eprint/44173

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