NDLI: Asynchronous cooperative spectrum sensing in multi-hop cognitive radio networks

Content Provider	IEEE Xplore Digital Library
Author	Yi Liu Yan Zhang Rong Yu Shengli Xie
Copyright Year	2012
Description	Author affiliation: Simula Research Laboratory, Norway; Department of Informatics, University of Oslo, Norway (Yan Zhang) \|\| School of Automation, Guangdong University of Technology, Guangzhou, China (Rong Yu; Shengli Xie) \|\| School of Elect.&Inform. Engineering, South China University of Technology, Guangzhou, China (Yi Liu)
Abstract	Previous cooperative sensing schemes require the cooperative Secondary Users (SUs) to behave in a synchronous way. This requires each SU to start cooperations at the same time by stopping their own transmissions. In multi-hop cognitive radio networks, it is very difficult to keep all SUs synchronized with others for sensing. In this paper, we propose an asynchronous cooperative sensing scheme for multi-hop cognitive radio networks in which each SU only provides its energy information in stead of ceasing its own transmission to perform the cooperative sensing. Each energy information is assigned an appropriate weight by considering the temporal and spatial diversities of each SU. We formulate the probabilities of detection and false alarm as optimization problems to find the optimal weight for every energy information. The achievable throughput has been derived. Numerical results show that the proposed scheme is able to achieve substantially higher throughput compared with the existing schemes.
Starting Page	169
Ending Page	173
File Size	328553
Page Count	5
File Format	PDF
ISBN	9781457713781
e-ISBN	9781457713798
DOI	10.1109/IWCMC.2012.6314197
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-08-27
Publisher Place	Cyprus
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Receivers Interference sensing overhead Multi-hop networks Throughput Sensors throughput Cognitive radio Signal to noise ratio asynchronous cooperative sensing
Content Type	Text
Resource Type	Article

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