NDLI: An overview of Cognitive Radio for satellite communications

Content Provider	IEEE Xplore Digital Library
Author	Biglieri, E.
Copyright Year	2012
Description	Author affiliation: Universitat Pompeu Fabra, Barcelona, Spain, Electrical Engineering Department, UCLA, and King Saud University, Riyadh, KSA (Biglieri, E.)
Abstract	The present scarcity of frequency spectrum allocated to radio communications has motivated the search for technologies able to alleviate it by adapting the transmission to changing environmental and network-usage conditions. Cognitive Radio is one of the most promising among these technologies. Three paradigms for its application have emerged. With “interweaving,” the secondary (unlicensed) users are able to occupy the portions of the spectrum left temporarily free by the primary (licensed) users. In the “underlay” paradigm, the secondary transmitter overlaps in frequency with the primary user, after making sure that the interference level it causes is below a given threshold. The “overlay” paradigm uses the secondary user's knowledge of the primary users transmission scheme and of the channel to choose a transmission scheme that causes an acceptable amount of interference. In this paper we briefly review the basic concepts underlying Cognitive Radio, and examine their applications to satellite communications.
Starting Page	1
Ending Page	3
File Size	92340
Page Count	3
File Format	PDF
ISBN	9781467346870
e-ISBN	9781467346887
e-ISBN	9781467346863
DOI	10.1109/ESTEL.2012.6400078
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-10-02
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Satellites Protocols Spectrum sensing Satellite broadcasting Interference Sensors Cognitive radio Satellite communications
Content Type	Text
Resource Type	Article

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