NDLI: Theory and design of multirate sensor arrays

Content Provider	IEEE Xplore Digital Library
Author	Jahromi, O.S. Aarabi, P.
Copyright Year	1991
Abstract	This paper studies the basic design challenges associated with multirate sensor arrays. A multirate sensor array is a sensor array in which each sensor node communicates a low-resolution measurement to a central processing unit. The objective is to design the individual sensor nodes and the central processing unit such that, at the end, a unified high-resolution measurement is reconstructed. A multirate sensor array can be modeled as an analysis filterbank in discrete-time. Using this model, the design problem is reduced to solving the following two problems: a) how to design the sensor nodes such that the time-delay of arrival (TDOA) between the sensors can be estimated and b) how to design a synthesis filterbank to fuse the low-rate data sent by the sensor nodes given the TDOA? In this paper, we consider a basic two-channel sensor array. We show that it is possible to estimate the TDOA between the sensors if the analysis filters incorporated in the array satisfy specific phase-response requirements. We then provide practical sample designs that satisfy these requirements. We prove, however, that a fixed synthesis filterbank cannot reconstruct the desired high-resolution measurement for all TDOA values. As a result, we suggest a fusion system that uses different sets of synthesis filters for even and odd TDOAs. Finally, we use the H/sub /spl infin// optimality theory to design optimal synthesis filters.
Sponsorship	IEEE Signal Processing Society
Starting Page	1739
Ending Page	1753
Page Count	15
File Size	1444424
File Format	PDF
ISSN	1053587X
Volume Number	53
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-05-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Sensor arrays Signal sampling Sensor fusion Filter bank Finite impulse response filter Central Processing Unit Network synthesis Sensor systems Wireless sensor networks Fuses sensor networks Delay estimation filterbanks FIR filters multirate systems multisensor systems sensor fusion
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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