VOICE/DATA COMMUNICATIONS USING VECTOR QUANTIZATION

Award Information
Agency:
Department of Defense
Branch
Air Force
Amount:
$41,920.00
Award Year:
1989
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Award Id:
10324
Agency Tracking Number:
10324
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
5739 Bridle Path Ct, Montgomery, AL, 36116
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
John Foster
(919) 852-3692
Business Contact:
() -
Research Institute:
n/a
Abstract
THE GOAL OF THIS RESEARCH PROJECT IS THE DEVELOPMENT OF A VOICE AND/OR DATA COMMUNICATIONS SYSTEM USING VECTOR QUANTIZATION (VQ). VECTOR QUANTIZATION HAS TRADITIONALLY BEEN USED AS A SOURCE CODING ALGORITH FOR DIGITAL CODING SYSTEMS. BY REVERSING THE ORDER OF THE ENCODER AND DECODER, VQ CAN BE USED TO TRANSMIT DIGITAL VOICE OR DATA IN A LOCALLY OPTIMUM MANNER. VQ ALSO OFFERS THE ADVANTAGE OF PROVIDING LOCALLY OPTIMUM SIGNAL SETS FOR A GIVEN TRANSMISSION SYSTEM, THEREBY COMING CLOSER TO THE SHANNON CHANNEL CAPACITY LIMIT FOR ANALOG CHANNELS. USING THE VQ DESIGN ALGORITHM, SIGNAL SETS CAN BE DESIGNED WHICH YIELD LOWER PROBABILITY OF BIT ERRORS AT A GIVEN BIT RATE THAN TRADITIONAL MODULATION SCHEMES. DUE TO THE UNIQUENESS OF THE CODEBOOK, VQ ALSO OFFERS AN INHERENT COVERTNESS NOT AVAILABLE WITH OTHER MODULATION SCHEMES. THE PHASE I PROPOSED RESEARCH WILL BE COMPOSED OF THE FOLLOWING STAGES: I) COMPUTER MODELING OF THE VQ MODULATION SYSTEM, II) SYSTEM SIMULATION AND SNR/BIT-RATE PERFORMANCE BOUNDS, AND III) REAL-TIME IMPLEMENTATION FOR A ADDITIVE WHITE GAUSSIAN NOISE CHANNEL. ONCE THE BASIC PRINCIPLES OF PHASE I HAVE BEEN ESTABLISHED, PHASE II & III EFFORTS WILL INCORPORATE FULL-SCALE DEVELOPMENTAL EFFORTS TOWARDS AN OPERATIONAL SYSTEM.

* information listed above is at the time of submission.

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