Title :
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
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;
Conference_Titel :
Signals, Systems and Computers, 1991. 1991 Conference Record of the Twenty-Fifth Asilomar Conference on
Conference_Location :
Pacific Grove, CA
Print_ISBN :
0-8186-2470-1
DOI :
10.1109/ACSSC.1991.186449
