Accession Number:

ADA285671

Title:

Signal-to-Noise Gain from Adaptive Matched-Field Beamforming of Multidimensional Acoustic Arrays

Descriptive Note:

Final rept. Oct 1989-Oct 1990

Corporate Author:

NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA

Personal Author(s):

Report Date:

1994-09-01

Pagination or Media Count:

28.0

Abstract:

Linear and adaptive matched-field beamforming of multidimensional arrays provide signal-to-noise gain and an estimation of range, depth, and azimuth of the sources of incident signals. Adaptive matched-field beamforming MFB with large arrays is predicted to achieve gain equal to the directivity index plus the total input-interference-to-independent-noise ratio IINR. An example distribution of received interference levels illustrates that measurements with relatively small volumetric arrays can determine the IINR, enabling an estimation of achievable array gain. Array sidelobe level requirements for adaptive MFB are derived, showing that good performance is obtained with relatively high sidelobes. Adaptive matched-field gain degradation from replica errors is shown to approach the linear matched-field gain degradation at low-output-signal-to-noise ratios. Adaptive array, Adaptive interference suppression algorithms, Cross-spectral matrix, Matched-field beamforming, Matched-field processing, Minimum variance distortionless responseMVDR, MVDR Beamforming

Subject Categories:

  • Acoustic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE