NDLI: Joint Power and Channel Allocation for Cognitive Radios

Content Provider	IEEE Xplore Digital Library
Author	Digham, F.F.
Copyright Year	2008
Description	Author affiliation: Nat. Telecom Regul. Authority, Cairo (Digham, F.F.)
Abstract	Spectrum scarcity is the major challenge facing all parties working in the telecommunications industry. As recently shown, the main problem of spectrum unavailability is due to spectrum inefficient utilization rather than spectrum scarcity. Inspired by this argument, a paradigm shift in spectrum management is achieved by the aid of smart radios called cognitive radios that can opportunistically access the available spectrum. In this context, we address the problems of power control and channel assignment jointly. Namely, given a set of available channels which is determined dynamically, we devise a near-optimal yet simple algorithm with linear complexity targeting capacity maximization of a cognitive radio network while jointly optimizing power and channel allocation among users (cognitive radios) while respecting total power constraints per individual users. In an extended version, we also consider a conservative design where signal-to-interference-plus-noise ratio (SINR) constraints at the primary users have are imposed. Simulated experiments illustrate the near optimal performance of the devised algorithm compared to the exhaustive search approach. Moreover, the limits of the system capacity are quantified given both ideal (no SINR constraints) and conservative (with SINR constraints) designs.
Starting Page	882
Ending Page	887
File Size	158058
Page Count	6
File Format	PDF
ISBN	9781424419975
ISSN	15253511
DOI	10.1109/WCNC.2008.161
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-03-31
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Channel allocation Cognitive radio Chromium Signal to noise ratio Power control Constraint optimization FCC Availability TV Communications Society
Content Type	Text
Resource Type	Article

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2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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