A passive source ranging method based on the frequency warping transform of the vertical intensity flux in shallow water

doi:10.1088/1674-1056/28/5/054302

Abstract The phase of cross-correlation function of two different normal modes contains source range information, which can be extracted by warping transform due to the dispersive characteristics of the shallow water waveguide. The autocorrelation function of the received pressure or particle velocity contains both modal autocorrelation component (MAC) and modal cross-correlation component (MCC), with the former part usually treated as interference for source ranging. Because the real part of the vertical intensity flux (RPVIF) only contains MCC, a passive impulsive source ranging method based on the frequency warping transform of RPVIF with a single vector receiver in shallow water is presented. Using a waveguide-invariant-based frequency warping operator, the cross-correlation components of two different modes in the vertical intensity flux are warped into separable impulsive sequences, the time delays of which are subsequently used for source ranging. The advantages of source ranging based on warping the vertical intensity flux compared with warping the pressure autocorrelation function are pointed out, and the experiment results are also presented.

Keywords: passive source ranging vertical intensity flux frequency warping transform normal mode

Received: 23 November 2018
Revised: 25 February 2019
Accepted manuscript online:

PACS:	43.30.Wi	(Passive sonar systems and algorithms, matched field processing in underwater acoustics)
	43.30.Bp	(Normal mode propagation of sound in water)
	43.60.Jn	(Source localization and parameter estimation)

Fund: Project supported by the Frontier Science Research Project of Chinese Academy of Sciences (Grant No. QYZDY-SSW-SLH005).

Corresponding Authors: Yu-Bo Qi
E-mail: qyb@mail.ioa.ac.cn

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Yu-Bo Qi(戚聿波), Shi-Hong Zhou(周士弘), Meng-Xiao Yu(于梦枭), Shu-Yuan Du(杜淑媛), Mei Sun(孙梅), Ren-He Zhang(张仁和) A passive source ranging method based on the frequency warping transform of the vertical intensity flux in shallow water 2019 Chin. Phys. B 28 054302

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A passive source ranging method based on the frequency warping transform of the vertical intensity flux in shallow water

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