Effect of uncertainties in modeling interferences in coherent and energy detectors for spectrum sensing

Author

Biglieri, Ezio

Author_Institution

Univ. Pompeu Fabra, Barcelona, Spain

fYear

2011

fDate

July 31 2011-Aug. 5 2011

Firstpage

2418

Lastpage

2421

Abstract

We examine an extreme case of modeling uncertainties in spectrum sensing, whereby the interference which, in addition to additive noise, affects a sensor has an unknown probability distribution, and only its maximum power is known. We deal with a situation in which the sensor disregards the presence of the interference, and we study its performance. Application of moment-bound theory allows the derivation of sharp (i.e., achievable) upper and lower bounds to the receiver operating characteristics of the sensor. Coherent and energy detectors are analyzed. In particular, it is proved that, even in the large signal-to-noise ratio regime, reliable sensing becomes impossible if the maximum interference power exceeds a certain threshold.

Keywords

cognitive radio; interference suppression; radio receivers; radio spectrum management; statistical distributions; additive noise; coherent detector; energy detectors; interference suppression; lower bounds; modeling uncertainties; moment bound theory; probability distribution; receiver; signal-to-noise ratio; spectrum sensing; upper bounds; Additives; Detectors; Interference; Signal to noise ratio; Uncertainty; Cognitive radio; Detection under uncertainties; Spectrum sensing;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Theory Proceedings (ISIT), 2011 IEEE International Symposium on

Conference_Location

St. Petersburg

ISSN

2157-8095

Print_ISBN

978-1-4577-0596-0

Electronic_ISBN

2157-8095

Type

conf

DOI

10.1109/ISIT.2011.6033998

Filename

6033998