Cooperative spectrum sensing with diversity reception in cognitive radios

Sun, Hongjian, Nallanathan, Arumugam, Jiang, Jing and Wang, Cheng-Xiang (2012) Cooperative spectrum sensing with diversity reception in cognitive radios. In: 2011 6th International ICST Conference on Communications and Networking in China (CHINACOM). IEEE, pp. 216-220. ISBN 978-1-4577-0100-9

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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.

Item Type: Book Section
Subjects: G900 Others in Mathematical and Computing Sciences
Department: Faculties > Engineering and Environment > Computer and Information Sciences
Depositing User: Becky Skoyles
Date Deposited: 18 Dec 2018 13:12
Last Modified: 11 Oct 2019 15:01

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