Phase-Difference Ambiguity Resolution for a Single-Frequency Signal in the Near-Field Using a Receiver Triplet

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Title: Phase-Difference Ambiguity Resolution for a Single-Frequency Signal in the Near-Field Using a Receiver Triplet
Authors: Ballal, Tarig
Bleakley, Chris J.
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Date: Nov-2010
Online since: 2015-09-17T15:37:35Z
Abstract: The problem of ambiguity in the phase-difference of a signal received by widely-spaced receivers is considered. It is shown that a collinear receiver triplet with a specific configuration combined with a proposed algorithm can be utilized for phase-difference disambiguation. The identifiability condition is that the difference of the two smaller inter-receiver spacings is not greater than a half-wavelength of the impinging signal and is greater than zero. The effect of the emitter location relative to the receiver array and the effect of noise are studied. Analytic formulae for the MSE (mean squared error) under Gaussian white noise are obtained and are used to directly determine performance versus SNR (signal-to-noise ratio) given the emitter location and the receiver configuration. Performance is found to exhibit an SNR threshold effect that depends on the emitter location and the sensor configuration. The analytic performance predictions are found to be close to the performance obtained in simulation.
Type of material: Journal Article
Publisher: IEEE
Journal: IEEE Transactions on Signal Processing
Volume: 58
Issue: 11
Start page: 5920
End page: 5926
Copyright (published version): 2010 IEEE
Keywords: Direction-of-arrivalDOAPhase-difference ambiguityTDOATime-delay estimation
DOI: 10.1109/TSP.2010.2062180
Language: en
Status of Item: Peer reviewed
Appears in Collections:Computer Science Research Collection

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