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SIGNAL PROCESSING FOR THROUGH-THE-EARTH COMMUNICATIONS

Award Information

Agency:
Department of Defense
Branch:
Air Force
Award ID:
991
Program Year/Program:
1985 / SBIR
Agency Tracking Number:
991
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Green Mountain Radio Research Company
77 Vermont Avenue Colchester, VT 05446-3121
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 2
Fiscal Year: 1985
Title: SIGNAL PROCESSING FOR THROUGH-THE-EARTH COMMUNICATIONS
Agency / Branch: DOD / USAF
Contract: N/A
Award Amount: $460,000.00
 

Abstract:

RELIABLE THROUGH-THE-EARTH COMMUNICATIONS (TEC) ARE NEEDED FOR COMMAND AND CONTROL OF DEEP-BASED ICBM SITES. THE REQUIRED DATA RATES CAN BE ACHIEVED BY USING BOTH SIGNAL CODING AND SIGNAL-TONOISE-RATIO (SNR) ENHANCEMENT TECHNIQUES. THE KEY SIGNAL-PROCESSING ELEMENTS OFJSUCHASYSTEM ARE: NOLINEAR PROCESSING (NLP), ADAPTIVE NOISE CANCELLATION (ANC), QUADRATURE-AMPLITUDE MOUDLATION (QAM), ERROR-CORRECTING CODING (ECC), AND DECISION-AIDED FEEDBACK (DAFB). NONLINEAR PROCESSING BY AN ADAPTIVE CLIPPER REMOVES MOST THE POWER CONCENTRATED IN THE IMPULSIVE SPIKES OF VLF NOISE. ADAPTIVE NOISE CANCELLATION COMBINES CORRELATED ELECTRIC-AND MAGNETIC-FIELD INPUTS TO MAXMIZE THE SNR. QAM AND ECC MATCH THE REQUIRED DATA RATE TO THE CHARACTERISTICS OF THE COMMUNICATION CHANNEL. DECISION-AIDED FEEDBACK ALLOWS THE OTHER THREE SYSTEMS TO OPERATE TOGETHER IN A NEARLY OPTIMAL MANNER. THE PROPOSED PROGRAM WILL DEVELOP A PRACTICAL AND NEARLY OPTIMAL TEC SYSTEM CONCEPT THROUGH ANALYSIS AND SIMULATION OF EACH OF THE SYSTEM ELEMENTS AND THEIR INTERACTIONS.

Principal Investigator:

Frederick H. Raab
8026559670

Business Contact:

Small Business Information at Submission:

Green Mountain Radio Research
50 Vermont Ave Ft Ethan Allen Winooski, VT 05404

EIN/Tax ID: 784654312
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No