Performance Analysis of Energy Detection with Multiple Correlated Antenna Cognitive Radio in Nakagami-m Fading

Author

Banjade, Vesh Raj S ; Rajatheva, Nandana ; Tellambura, Chintha

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Alberta, Edmonton, AB, Canada

Volume

16

Issue

4

fYear

2012

fDate

4/1/2012 12:00:00 AM

Firstpage

502

Lastpage

505

Abstract

This letter analyzes the performance of energy- detection-based spectrum sensing in a cognitive radio (CR) possessing multiple correlated antennas when the channel from the primary user (PU) to the CR is Nakagami-m faded. The probability of detection of the CR by employing square law combining (SLC) is derived by using the MGF-based approach. Special cases of equally correlated, exponentially correlated and a linear array of 2, 3 and 4 arbitrarily correlated antennas are treated. Numerical and simulation results are used to quantify the detector performance as a function of antenna correlation across the branches, number of antennas, fading severity and the time-bandwidth product.

Keywords

Nakagami channels; antennas; cognitive radio; MGF-based approach; Nakagami-m fading; cognitive radio; energy-detection-based spectrum sensing; multiple correlated antenna; performance analysis; primary user; square law combining; Correlation; Covariance matrix; Detectors; Diversity reception; Fading; Linear antenna arrays; Cognitive radio; Nakagami-m; correlation; moment generating function; multiple antenna; square law combining;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2012.020212.112541

Filename

6150658