NDLI: Correlation among time difference of arrival estimators and its effect on localization in a multipath environment

Content Provider	IEEE Xplore Digital Library
Author	Xiang Yuan, Y. Carter, G.C. Salt, J.E.
Copyright Year	1995
Description	Author affiliation: Dept. of Electr. Eng., Saskatchewan Univ., Saskatoon, Sask., Canada (Xiang Yuan, Y.)
Abstract	A generalized covariance expression for time difference of arrival (TDOA) estimators is derived for an M-sensor arbitrary array in a two-path underwater environment. The resulting expression can be reduced to the variance and covariance expressions developed previously. The correlation among the time difference of arrival estimators and its effect on the localization error are investigated for a two-sensor vertical array. The results show that the correlation among the multipath TDOA estimators is significant and the degree of correlation depends on the power spectral density of the source signal and that of the noise, and only on two multipath TDOAs. Because of this correlation, every TDOA estimate contributes information to the localization and therefore a whole set of TDOA estimators should be used.
Starting Page	3163
Ending Page	3166
File Size	396828
Page Count	4
File Format	PDF
ISBN	0780324315
ISSN	15206149
DOI	10.1109/ICASSP.1995.479556
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-05-09
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Time difference of arrival Acoustic noise Sea surface Acoustic sensors Oceans Delay effects Autocorrelation Sensor systems Underwater acoustics Bibliographies
Content Type	Text
Resource Type	Article

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