NDLI: Reducing interference with cognitive relays

Content Provider	IEEE Xplore Digital Library
Author	Firag, A. Smith, P.J.
Copyright Year	2010
Description	Author affiliation: Department of Mathematics and Statistics, University of Canterbury, Christchurch, New Zealand (Firag, A.) \|\| Department of Electrical and Computer Engineering and Mathematics and Statistics, University of Canterbury, Christchurch, New Zealand (Smith, P.J.)
Abstract	In this paper, we consider the interference caused by a secondary system to the primary system in a cognitive radio network. We consider a secondary system deployed in a field of primary receivers. Primary receivers are assumed to be distributed according to a Poisson point process with a density parameter λp. We assume that the secondary system consists of source, relay, and destination terminals, and the source terminal can communicate with the destination terminal either directly (direct mode) or using the relay (relaying mode). We derive analytical expressions for the outage probability of both modes including pathloss, shadowing and multipath fading, and validate the analytical results by simulation. We also derive analytical expressions for the maximum interference caused by both modes to the primary receivers. The results show that to achieve the same median SNR level, the relaying mode may cause less interference to the primary receivers than the direct mode in high pathloss and low shadowing conditions. However, the relaying mode has much higher interference than the direct mode if both modes have the same capacity performance. The results also show that the capacity of the relaying mode has to be reduced by about one half to provide the same level of interference as the direct mode in a typical channel environment.
Starting Page	1
Ending Page	6
File Size	231842
Page Count	6
File Format	PDF
ISBN	9781424470693
e-ISBN	9781424470716
DOI	10.1109/WIAD.2010.5544881
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-06-27
Publisher Place	United Kingdom
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fading Analytical models Radio transmitters Interference Receivers Power system relaying Mathematics Cognitive radio Relays Shadow mapping
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
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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