NDLI: Energy efficient cooperative spectrum sensing in wireless multi-antenna sensor network

Content Provider	Springer Nature Link
Author	Hojjati, Seyed Hani Ebrahimzadeh, Ataollah Andargoli, Seyed Mehdi Hosseini Najimi, Maryam
Copyright Year	2016
Abstract	This paper will address sensor selection problem for spectrum sensing in a cognitive radio network. The sensor’s limited energy is an important issue which has attracted more attention in recent years. An energy efficient cooperative spectrum sensing will hereby be proposed when multi-antenna sensors are used. Two decision-making techniques are utilized for the combination of antennas’ signals in each sensor: hard and soft decision-making. OR rule is used for hard decision-making technique while selection combining, equal gain combining and maximum ratio combining (MRC) are used for the soft one. In each combination scheme, the sensor selection is a problem by means of which both the energy consumption is minimized and the detection performance gets satisfied. The problem is solved based on the standard convex optimization method. Simulation results show the achievement of a significant energy saving compared to the networks using single-antenna sensors specifically in low signal to noise ratio state. Among all methods, MRC combining enjoys the least energy consumption, as well; it satisfies the desired detection performance.
Starting Page	567
Ending Page	578
Page Count	12
File Format	PDF
ISSN	10220038
Journal	Wireless Networks
Volume Number	23
Issue Number	2
e-ISSN	15728196
Language	English
Publisher	Springer US
Publisher Date	2016-01-04
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Sensor Networks Multi-antenna struture Energy efficiency Detection performance Communications Engineering, Networks Computer Communication Networks Electrical Engineering IT in Business
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Information Systems Electrical and Electronic Engineering

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