Multiply-constrained MVDR matched field processing with a-posteriori constraints for enhanced robustness to mismatch

Author

Zoltowski, Michael D. ; Kautz, Gregory M. ; Chou, S.I.

Author_Institution

Sch. of Electr. Eng., Purdue Univ., West Lafayette, IN, USA

fYear

1991

fDate

4-6 Nov 1991

Firstpage

242

Abstract

It has been proposed that source localization in passive sonar be accomplished via some form of matched field processing (MFP). Fully coherent, minimum variance distortionless response (MVDR) MFP assumes complete and perfect characterization of the underwater multipath propagation channel and is known to be extremely sensitive to mismatch between model parameters and actual environmental parameters. A minimax, multirank signal variation of MVDR MFP, semicoherent MVDR MFP, is presented. Simulation results show semicoherent MVDR MFP to be both relatively robust to mismatch, with respect to relative amplitudes and phases among multipath arrivals, and comparable in performance to fully coherent MVDR MFP under no mismatch conditions

Keywords

acoustic signal processing; acoustic wave propagation; minimax techniques; sonar; underwater sound; a-posteriori constraints; amplitudes; environmental parameters; matched field processing; minimax multirank signal variation; minimum variance distortionless response; mismatch robustness; model parameters; multiply constrained MVDR; passive sonar; phases; semicoherent MVDR MFP; simulation results; source localization; underwater multipath propagation channel; Acoustic arrays; Acoustic distortion; Minimax techniques; Oceans; Position measurement; Ray tracing; Robustness; Sensor arrays; Signal to noise ratio; Sonar;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems and Computers, 1991. 1991 Conference Record of the Twenty-Fifth Asilomar Conference on

Conference_Location

Pacific Grove, CA

ISSN

1058-6393

Print_ISBN

0-8186-2470-1

Type

conf

DOI

10.1109/ACSSC.1991.186449

Filename

186449