Title :
Primary System Detection for Cognitive Radio: Does Small-Scale Fading Help?
Author :
Larsson, Erik G. ; Regnoli, Giorgio
Author_Institution :
Linkoping Univ., Linkoping
fDate :
10/1/2007 12:00:00 AM
Abstract :
We consider the effect of small-scale fading on the detection of weak signals in cognitive radio systems. We formulate a model for the detection problem taking fading into account, and give the associated likelihood ratio tests. Additionally we give an expression for the asymptotic detection performance and use this to consider the tradeoff between the detection performance and the coherence time and bandwidth of the channel.
Keywords :
cognitive radio; fading channels; signal detection; associated likelihood ratio tests; channel bandwidth; cognitive radio; primary system detection; small-scale fading; weak signals detection; Bandwidth; Cellular networks; Cognitive radio; Coherence; Fading; Frequency; Helium; Interference; Signal detection; Testing;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2007.070923
