ANTI-JAM METHODS FOR RF RECEIVER

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$572,000.00
Award Year:
1991
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Agency Tracking Number:
12267
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Atlantic Aerospace Electronics
470 Totten Pond Rd, Waltham, MA, 02154
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Dr Michael S Wengrovitz
(617) 890-4200
Business Contact:
() -
Research Institution:
n/a
Abstract
DETECTION, LOCALIZATION, AND CLASSIFICATION OF SUBMARINES IN ASW OPERATIONS CAN BE ACCOMPLISHED THROUGH THE USE OF AIR-DROPPED SONOBUOYS. ACOUSTIC SIGNALS SENSED BY SONOBUOYS ARE TELEMETERED BACK VIA AN RF LINK TO AN OVERHEAD AIRCRAFT FOR ASSOCIATED SIGNAL PROCESSING. HOWEVER, THE TELEMETRY PROCESS IS SUBJECT TO RELATIVELY UNSOPHISTICATED RF JAMMING WHICH CAN RENDER THE OVERALL SURVEILLANCE SYSTEM INEFFECTIVE. THIS PROPOSAL IS AIMED AT IMPROVING THE IMMUNITY OF SONOBUOY-BASED ASW SYSTEMS TO RF JAMMING THREATS. THE PROPOSED APPROACH IS TO UTILIZE AN ANTENNA ARRAY AND DIGITL PROCESSOR FOR AUTOMATIC SPATIAL NULLING OF RF JAMMERS. PAST WORK CONDUCTED BY ATLANTIC AEROSPACE IN RAPIDLY-CONVERGENT ADAPTIVE NULLING ALGORITHM DEVELOPMENT, HIGH -RESOLUTION DIRECTION FINDING FOR MULTIPLE COCHANNEL EMITTERS, AND REAL-TIME BEAMFORMING/NULLING BRASSBOARD DEVELOPMENT PROVIDES A STRONG FOUNDATION AND RELEVANT BASE FOR THE PROPOSED EFFORT. PHASE I WORK WILL DEFINE CANDIDATE SCENARIOS, QUANTIFY EXPECTED PERFORMANCE GAINS FROM SPATIAL PROCESSING, DEVELOP A JAMMER NULLING ALGORITHM WHICH AVOIDS ERRONEOUS NULLING OF THE DESIRED SIGNALS, AND SPECIFY A HIGH-LEVEL ARCHITECTURE FOR IMPLEMENTATION. THE BASIS OF THE APPROACH IS TO EXPLOIT A SERIES OF WEIGHT-AND-SUM ADAPTIVE BEAMFORMERS WHICH ARE APPLIED TO EACH NARROWBAND SONOBUOY CHANNEL.

* information listed above is at the time of submission.

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