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Cooperative Spectrum Sensing for Heterogeneous Sensor Networks Using Multiple Decision Statistics
Sharma, Shree Krishna; Chatzinotas, Symeon; Ottersten, Björn
2015In Proceedings of CROWNCOM 2015
Peer reviewed
 

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Keywords :
Cooperative Spectrum Sensing; Cognitive Radio; Joint PDF; Heterogeneous Sensor Networks
Abstract :
[en] The detection of active Primary Users (PUs) in practical wireless channels with a single Cognitive Radio (CR) sensor is challenging due to several issues such as the hidden node problem, path loss, shadowing, multipath fading, and receiver noise/interference uncertainty. In this context, Cooperative Spectrum Sensing (CSS) is considered a promising technique in order to enhance the overall sensing efficiency. Existing CSS methods mostly focus on homogeneous cooperating nodes considering identical node capabilities, equal number of antennas, equal sampling rate and identical Signal to Noise Ratio (SNR). However, in practice, nodes with different capabilities can be deployed at different stages and are very much likely to be heterogeneous in terms of the aforementioned features. In this context, we study a decision statistics-based centralized CSS which can reduce the signalling burden compared to the one of the sample-based CSS and at the same time achieve the desired level of sensing performance. More specifically, we propose a novel CSS technique based on the joint Probability Distribution Function (PDF) of the multiple decision statistics resulting from different processing capabilities at the sensor nodes and compare its performance with various existing cooperative schemes. Further, we provide a design guideline for the network operators to facilitate decision making while upgrading a sensor network.
Disciplines :
Electrical & electronics engineering
Author, co-author :
Sharma, Shree Krishna ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)
Chatzinotas, Symeon  ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)
Ottersten, Björn ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)
External co-authors :
no
Language :
English
Title :
Cooperative Spectrum Sensing for Heterogeneous Sensor Networks Using Multiple Decision Statistics
Publication date :
April 2015
Event name :
International Conference on Cognitive Radio Oriented Wireless Networks (CROWNCOM)
Event organizer :
European Alliance for Innovation (EAI)
Event place :
Doha, Qatar
Event date :
21-04-2015 to 23-04-2015
Audience :
International
Main work title :
Proceedings of CROWNCOM 2015
Peer reviewed :
Peer reviewed
Available on ORBilu :
since 13 April 2015

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