Quantizer Design for Energy-Based Source Localization in Sensor Networks

We consider energy-based source localization applications, where distributed sensors quantize acoustic signal energy readings and transmit quantized data to a fusion node, which then produces an estimate of the source location. We propose an iterative quantizer design algorithm that allows us to tak...

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Bibliographic Details
Published in:IEEE transactions on signal processing 2011-11, Vol.59 (11), p.5577-5588
Main Authors: Yoon Hak Kim, Ortega, A.
Format: Article
Language:English
Subjects:
Algorithm design and analysis
Algorithms
Applied sciences
Coding, codes
Computer simulation
Cost function
Counters
Detection, estimation, filtering, equalization, prediction
Distributed compression
distributed source coding (DSC)
Energy measurement
Estimation
Exact sciences and technology
generalized Lloyd algorithm
Information theory
Information, signal and communications theory
Localization
Partitioning
Position (location)
Position measurement
Quantization
quantizer design
sensor networks
Sensors
Signal and communications theory
Signal, noise
source localization
Strategy
Telecommunications and information theory
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Summary:We consider energy-based source localization applications, where distributed sensors quantize acoustic signal energy readings and transmit quantized data to a fusion node, which then produces an estimate of the source location. We propose an iterative quantizer design algorithm that allows us to take into account localization accuracy for quantizer design in the framework of the generalized Lloyd algorithm. Since source coding methodologies based on the Lloyd algorithm suffer from the presence of numerous poor local optima depending on initialization of quantizers, we introduce an efficient initialization, the equally distance-divided quantizer (EDQ), designed so that quantizer partitions correspond to a uniform partitioning in terms of distance. Our simulations demonstrate that improved performance over traditional quantizer designs can be achieved by using our proposed application specific strategy.
ISSN:1053-587X
1941-0476
DOI:10.1109/TSP.2011.2163401