Robust Towed Array Beamforming

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N00039-04-C-0034
Agency Tracking Number: N031-1057
Amount: $1,199,320.00
Phase: Phase II
Program: SBIR
Awards Year: 2004
Solicitation Year: 2003
Solicitation Topic Code: N03-146
Solicitation Number: 2003.1
Small Business Information
APPLIED HYDRO-ACOUSTICS RESEARCH, INC.
15825 Shady Grove Rd. Suite 135, Rockville, MD, 20850
DUNS: 074844234
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Walter Allensworth
 Vice President
 (301) 840-9722
 walt@aharinc.com
Business Contact
 Llew Wood
Title: President
Phone: (703) 968-8040
Email: llew@aharinc.com
Research Institution
N/A
Abstract
In Phase I Robust Towed Array Beamforming (RTAB) work, Applied Hydro-Acoustics Research, Inc. (AHA) developed and tested several candidate algorithms, including a data-adaptive "Hole-Filling" algorithm, that recover losses of acoustic performance resulting from acoustic channels failures. With SURTASS TwinLine-R sea-test data we have shown a 2 to 3 dB improvement in quiet beam levels by "hole-filling" failed sensors, with performance restoration back to that of a fully operational array, for random channel failure-rates of up to 15%. Additionally, AHA has demonstrated this performance with operationally relevant passive broadband and narrowband processing and prototype displays. Acoustic performance results show that Robust Beamforming Algorithms support continued field-operations, with excellent performance, for arrays that may otherwise be deemed operationally unavailable. In addition, AHA performed a preliminary sizing and timing study to show that this technology will fit in an inexpensive hardware footprint. A Phase II follow-on contract is recommended. In Phase II, AHA will continue to design and develop RTAB algorithms, and then develop, integrate, and test real-time RTAB software and transition it to a Common Processor environment. In the Phase II Option AHA will perform algorithm updates and develop an approach to transition RTAB technology to other Navy sensors.

* information listed above is at the time of submission.

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