Energy Efficient Resource Allocation for Cognitive Radios: A Generalized Sensing Analysis

AbdulRahman Alabbasi, Zouheir Rezki, Basem Shihada

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

In this paper, two resource allocation schemes for energy efficient cognitive radio systems are proposed. Our design considers resource allocation approaches that adopt spectrum sharing combined with soft-sensing information, adaptive sensing thresholds, and adaptive power to achieve an energy efficient system. An energy per good-bit metric is considered as an energy efficient objective function. A multi-carrier system, such as, orthogonal frequency division multiplexing, is considered in the framework. The proposed resource allocation schemes, using different approaches, are designated as sub-optimal and optimal. The sub-optimal approach is attained by optimizing over a channel inversion power policy. The optimal approach utilizes the calculus of variation theory to optimize a problem of instantaneous objective function subject to average and instantaneous constraints with respect to functional optimization variables. In addition to the analytical results, selected numerical results are provided to quantify the impact of soft-sensing information and the optimal adaptive sensing threshold on the system performance.
Original languageEnglish (US)
Pages (from-to)2455-2469
Number of pages15
JournalIEEE Transactions on Wireless Communications
Volume14
Issue number5
DOIs
StatePublished - Dec 31 2014

Fingerprint Dive into the research topics of 'Energy Efficient Resource Allocation for Cognitive Radios: A Generalized Sensing Analysis'. Together they form a unique fingerprint.

Cite this