MINIMIZING THE EFFECT OF JAMMING THROUGH THE USE OF WIDEBAND HF

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N/A
Agency Tracking Number: 12928
Amount: $49,757.00
Phase: Phase I
Program: SBIR
Awards Year: 1990
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Scs Telecom Inc
107 Haven Ave, Port Washington, NY, 11050
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Marvin Kullback
 (516) 883-0760
Business Contact
Phone: () -
Research Institution
N/A
Abstract
HF IS USED EXTENSIVELY TO SUPPORT BEYOND-LINE-OF-SIGHT (BLOS) COMMUNICATION REQUIREMENTS. IN GENERAL THESE LINKS ARE BOTH EASY TO EXPLOIT AND EASY TO JAM. FREQUENCY HOPPING TECHNIQUES HAVE BEEN USED WITH LIMITED SUCCESS AGAINST THIS JAMMING. FURTHER, THE DATA TO BE TRANSMITTED IS CONSTRAINED TO HAVE LOW BIT RATES. THIS PROPOSAL DESCRIBES A NOVEL APPROACH TO IMPROVE JAM RESISTANCE AND TO ASSURE LPI AND LPE. THE TECHNIQUES USED INCLUDE SHARPLY FILTERED TRELLIS CODED FM TO PROVIDE LPI AND LPE; DIRECT SEQUENCY SPREAD SPECTRUM OF THE HF SIGNAL TO ACHIEVE A WIDE BANDWIDTH AND REDUCE FADING; AND NARROWBAND EXCISION USING THE FFT TO MINIMIZE THE EFFECT OF JAMMERS.

* information listed above is at the time of submission.

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