Cooperative spectrum sensing with diversity reception in cognitive radios

Hongjian Sun, Arumugam Nallanathan, Jing Jiang, Cheng-xiang Wang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

19 Citations (Scopus)

Abstract

Cognitive radio (CR) is a promising technology that is capable of exploiting the scarcity of radio spectrum. One of the most important challenges for a CR system is to perform spectrum sensing in a fading environment. Diversity reception techniques are often used to combat the detrimental effects of fading channels. In this paper, we derive representations for the average probabilities of detection and false alarm when using energy detection with different diversity reception schemes over Nakagami-m fading channels. These expressions are then proved to have lower computational complexity than those proposed in the literature. The performance of different diversity reception schemes is compared for finding a proper cooperative strategy under different constraints. Simulation results show that with the aid of channel state information (CSI), maximum ratio combining gives an upper bound of the detection performance. Without CSI, square-law combining offers the best detection performance.
Original languageEnglish
Title of host publication2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)
PublisherIEEE
Pages216-220
ISBN (Electronic)978-1-4577-0101-6
ISBN (Print)978-1-4577-0100-9
DOIs
Publication statusPublished - 27 Feb 2012
Event2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) - Harbin, China
Duration: 17 Aug 201119 Aug 2011

Conference

Conference2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)
Period17/08/1119/08/11

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