Adaptive Modulation for Cognitive Radio

Abstract

While investigating methods for more efficiently allocating the available spectrum researchers noticed that in many geographical locations, there are broad bands of frequencies that are lightly utilized. Such inefficiencies are inevitable with fixed spectral allocation rules. Cognitive Radios actively measure the spectral utilization and adapt their modulation, frequencies, bandwidths, power, etc. to take advantage of these lightly used "spectral holes" or "white spaces". Much of the research work in cognitive radios has not taken into account some of the challenges faced in the telemetry community-including multipaths and a guaranteed quality of service. This paper highlights how some mathematical models of adaptive modulation discussed extensively in many research papers and textbooks can be used in Cognitive Radios as well. © International Foundation for Telemetering, 2007.

Department(s)

Electrical and Computer Engineering

Keywords and Phrases

Adaptive modulation; Cognitive radio; Nakagami fading; Rayleigh fading

International Standard Serial Number (ISSN)

0884-5123

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 International Foundation for Telemetering, All rights reserved.

Publication Date

01 Dec 2007

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