USA flag logo/image

An Official Website of the United States Government

BEAMFORMING FOR CHANGING HYDROPHONE GEOMETRY

Award Information

Agency:
Department of Defense
Branch:
Navy
Award ID:
5740
Program Year/Program:
1987 / SBIR
Agency Tracking Number:
5740
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Digital Signals & Systems Spec
11985 Brookston Dr Springdale, OH 45240
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 1987
Title: BEAMFORMING FOR CHANGING HYDROPHONE GEOMETRY
Agency / Branch: DOD / NAVY
Contract: N/A
Award Amount: $49,855.00
 

Abstract:

CURRENT BEAMFORMERS OF INTEREST ASSUME A KNOWN AND FIXED HYDROPHONE GEOMETRY. THIS IS NOT ALWAYS THE CASE. AN IMPORTANT CASE OF INTERESTIS WHEN THE HYDROPHONE POSITIONS CHANGE WITH TIME. IN THIS CASE, THE PERFORMANCE OF BEAMFORMER DESIGNED FOR FIXED HYDROPHONE GEOMETRY WILL BE SIGNIFICANTLY DEGRADED. ON THE OTHER HAND, MODIFYING A BEAMFORMER TO RESPOND TO HYDROPHONE TIME TRAJECTORIES WILL REQUIRE CHANGES IN THE FUNDAMENTAL SHIPBOARD SIGNAL PROCESSING ARCHITECTURE, WHICH IS COSTLY AND INCONVENIENT. THIS PROPOSAL PRESENTS THE POSSIBILITY OF DEVELOPING A STAND-ALONE DEVICE WHICH WOULD SUPPLY INCREMENTAL DELAYS IN RESPONSE TO ARRAY GEOMETRY CHANGES SO THAT THE HYDROPHONE OUTPUTS WHICH GO TO THE CENTRAL BEAMFORMER WILL "APPEAR" TO BE COMING FROM UNDISTORTED GEOMETRY. THUS, THIS DEVICE WILL EFFECTIVELY UPGRADE EXISTING CONVENTIONAL BEAMFORMERS TO HANDLE CHANGING HYDROPHONES GEOMETRY WITHOUT HAVING TO CHANGE THE BEAMFORMER ARCHITECTURE. TWO APPROACHES ARE PROPOSED - THE FORMER FOR SITUATIONS WHERE TRAJECTORIES ARE KNOWN, AND THE LATTER FOR UNKNOWN HYDROPHONE POSITIONS WITH KNOWN NOMINAL (MEAN) POSITIONS.

Principal Investigator:

Dr p a ramamoorthy
5137425056

Business Contact:

Small Business Information at Submission:

Digital Signals & Systems Spec
11985 Brookston Dr Springdale, OH 45240

EIN/Tax ID:
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No