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

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 kno...

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Published in[1991] Conference Record of the Twenty-Fifth Asilomar Conference on Signals, Systems & Computers pp. 242 - 246 vol.1
Main Authors Zoltowski, M.D., Kautz, G.M., Chou, S.I.
Format Conference Proceeding
LanguageEnglish
Published IEEE Comput. Soc. Press 1991
Subjects
Acoustic arrays
Acoustic distortion
Minimax techniques
Oceans
Position measurement
Ray tracing
Robustness
Sensor arrays
Signal to noise ratio
Sonar
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Summary: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.< >
ISBN:9780818624704
0818624701
ISSN:1058-6393
2576-2303
DOI:10.1109/ACSSC.1991.186449