DocumentCode
443531
Title
Distributed diversity in ultrawide bandwidth wireless sensor networks
Author
Quek, Tony Q S ; Win, Moe Z. ; Chiani, Marco
Author_Institution
Lab. for Inf. & Decision Syst., Massachusetts Inst. of Technol., Cambridge, MA, USA
Volume
2
fYear
2005
fDate
30 May-1 June 2005
Firstpage
1355
Abstract
In this paper we consider a decentralized detection problem in ultrawide bandwidth (UWB) wireless sensor network (WSN). The system model assumes that all sensor nodes have established an ad-hoc network for sharing the information before sending the common message to the fusion center. The architecture is asynchronous and communication channels between the local sensors to the fusion center are subjected to fading and noise. Our communication strategy employs a UWB transmitted-reference (TR) signaling scheme. We first analyze the asymptotic performance of our communication strategy via the Chernoff bound and show that the upper bound on the probability of decision error at the fusion center decays exponentially with increasing number of nodes. Simple link budget analysis is given to demonstrate the need for distributed diversity in energy constrained large scale WSN. We also derive the required average transmission power per bit of each node to achieve a target BER at the fusion center and quantify the energy efficiency of our communication strategy.
Keywords
ad hoc networks; diversity reception; error statistics; sensor fusion; telecommunication signalling; ultra wideband communication; wireless channels; wireless sensor networks; UWB transmitted-reference signaling scheme; ad-hoc network; communication channels; decentralized detection problem; decision error probability; distributed diversity; fusion center; ultrawide bandwidth wireless sensor networks; Ad hoc networks; Bandwidth; Communication channels; Fading; Large-scale systems; Performance analysis; Sensor fusion; Sensor systems; Upper bound; Wireless sensor networks;
fLanguage
English
Publisher
ieee
Conference_Titel
Vehicular Technology Conference, 2005. VTC 2005-Spring. 2005 IEEE 61st
ISSN
1550-2252
Print_ISBN
0-7803-8887-9
Type
conf
DOI
10.1109/VETECS.2005.1543530
Filename
1543530
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