AUTOMATIC DETECTION AND TRACKING OF ACOUSTIC SIGNALS OF LOW SIGNAL-TO-NOISE RATIO (SNR) USING INNOVATIVE BEAMFORMING AND THREE-DIMENSIONAL TRACKING

Award Information
Agency:
Department of Defense
Branch:
Navy
Amount:
$50,008.00
Award Year:
1993
Program:
SBIR
Phase:
Phase I
Contract:
N/A
Agency Tracking Number:
20403
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Neptune Sciences, Inc.
1181 Robert Boulevard, Slidell, LA, 70458
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
N/A
Principal Investigator
 James H. Wilson
 (714) 492-8129
Business Contact
Phone: () -
Research Institution
N/A
Abstract
Conventional Beamforming (CBF) provides optimum signal detection under ideal ocean conditions (single plane-wave in isotropic, spatially incoherent noise). These conditions never exist in real ocean environments. In order to improve on CBF's performance, Neptune Sciences, Inc. (NSI) has developed and Inverse Beamforming (IBF) method which consists of four algorithms: 1) the Fourier Integral Method (FIM) / Fourier Series Method (FSM) beamforming, 2) noise normalization, 3) an eight nearest neighbor peak picker and 4) a three-dimensional M of N tracking algorithm. The theoretical development for each algorithm is given in detail in this proposal. The IBF method has been tested using several different data sets and has produced extremely successful results for narroband, SWATH and broadband energy detection and bearing estimation. The results have been obtained for many different arrays, including a real-time experiment on board a US submarine during RANGEX 1-92. NSI proposes to take this innovative and successful theory, apply it to Navy supplied data from the Fixed Distribution System (FDS), the FDS Deployable (FDSD), or the Advanced Deployable System (ADS) and compare the IBF methods' performance to a baseline performance selected by the Navy.

* information listed above is at the time of submission.

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