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Paper Information

Journal:   INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE (ENGLISH)   Winter 2003 , Volume 14 , Number 1; Page(s) 59 To 70.
 
Paper: 

A CROSS-RELATION MATCHED FIELD PROCESSOR FOR SOURCE LOCALIZATION

 
 
Author(s):  MOKHTARI DIZAJI R., MOKHTARI DIZAJI M.
 
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Abstract: 
This paper introduces a cross-relation (CR) based matched field processor (MFP) for source localization in a shallow water environment where the source generate a random signal. The estimation formulas are given for non-stationary (NS) and wide sense stationary(WSS) random sources. For each case two formulations are proposed, a self-CR and a cross- CR according to which channel output signal used to construct the estimator. We demonstrate the performance of the proposed estimators in source localization, and compare their results with two common estimators, the Bartlett and Minimum Variance (or Capons) matched field processors. The comparison is carried out first by simulation of a wide band, WSS source in a shallow water environment that represents the continental shelf offshore of Vancouver Island. Subsequently, comparison real ship is also carrier out using signal recorded at the same site. The simulation results show that in the low signal-to-noise ratio (SNR) the cross-CR MFP gives superior result in comparison with the self-CR, Bartlett and MV processor with respect to resolution and side lobe level. For real ship signal both CR based MFPs show similar results and in comparison with Bartlett processor, they give lower side lobe level throughout the ambiguity surface and narrower main lobe around source location.
 
Keyword(s): ACOUSTIC FIELD, SOURCE LOCALIZATION, BARTLETT, MINIMUM VARIANCE, MATCHED FIELD PROCESSOR.
 
References: 
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