NDLI: Signal power variation with applications to cognitive radio

Content Provider	IEEE Xplore Digital Library
Author	Smith, P.J. Suraweera, H.A. Shafi, M.
Copyright Year	2008
Description	Author affiliation: Univ. of Canterbury, Christchurch (Smith, P.J.)
Abstract	The performance of cognitive radio systems will depend critically on the ability of the secondary user to relinquish borrowed spectrum when it's interference level at the primary user exceeds a certain threshold. Hence, in this paper we investigate the temporal behaviour of this interference power. In particular, we derive the level crossing rate (LCR) of the power. This gives the rate at which a cognitive radio's interference level increases above the acceptable threshold. The LCR is derived for the case of lognormal shadow fading and two different mobility models. The results cater for temporal variations in both shadowing and distance. The basic nature of the LCR appears to be insensitive to the mobility model and suggests that a simple Gaussian LCR can be used as a good approximation in a broad range of cases.
Starting Page	33
Ending Page	38
File Size	136616
Page Count	6
File Format	PDF
ISBN	9781424420377
DOI	10.1109/AUSCTW.2008.4460818
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-01-30
Publisher Place	New Zealand
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fading level crossing rate spatial shadowing Temperature Interference Rayleigh channels shadow fading Cognitive radio Application software Power system modeling Shadow mapping Chromium lognormal processes MIMO
Content Type	Text
Resource Type	Article

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