DocumentCode :
1011501
Title :
Phase-Difference Ambiguity Resolution for a Single-Frequency Signal
Author :
Ballal, Tarig ; Bleakley, C.J.
Author_Institution :
Sch. of Comput. Sci. & Inf., Univ. Coll. Dublin, Dublin
Volume :
15
fYear :
2008
fDate :
6/30/1905 12:00:00 AM
Firstpage :
853
Lastpage :
856
Abstract :
In this letter, we propose a novel method to disambiguate the phase-difference of a single-frequency signal observed between a pair of spatially separated sensors, with inter-sensor spacing exceeding half the wavelength (lambda/2) of the signal. We mathematically prove that, in a noiseless case, the true phase-difference can unambiguously be estimated utilizing a third collinear sensor, provided that the absolute difference between the two smaller inter-sensor spacings is less than lambda/2. The performance of the method is characterized by estimating the probability of failure in noisy cases.
Keywords :
sensor arrays; signal processing; collinear sensor; intersensor spacing; phase-difference; phase-difference ambiguity resolution; single-frequency signal; spatially separated sensors; Delay estimation; Frequency domain analysis; Frequency estimation; Phase estimation; Phase noise; Radar; Sensor arrays; Sensor phenomena and characterization; Signal resolution; Spatial resolution; Phase-difference unwrapping; sensor arrays; time-delay estimation;
fLanguage :
English
Journal_Title :
Signal Processing Letters, IEEE
Publisher :
ieee
ISSN :
1070-9908
Type :
jour
DOI :
10.1109/LSP.2008.2005439
Filename :
4691055
Link To Document :
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