HIGH DATA RATE SATELLITE COMMUNICATIONS

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$250,000.00
Award Year:
1990
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Agency Tracking Number:
10089
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Qualcomm Inc.
10555 Sorrento Valley Rd, San Diego, CA, 92191
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Andrew J Viterbi
(619) 587-1121
Business Contact:
() -
Research Institution:
n/a
Abstract
QUALCOMM, INC. PROPOSES TO STUDY THE DEVELOPMENT OF A DIGITAL UHF SATCOM MODEM CAPABLE OF TRANSMITTING THREE TIMES THE INFORMATION RATE IN A GIVEN CHANNEL BANDWIDTH CURRENTLY TRANSMITTED BY CONVENTIONAL MEANS. OVER FLTSAR 25 KHZ CHANNELS TYPICAL CURRENT INFORMATION RATES ARE NOT GREATER THAN 16 KB/S, WHILE THE PROPOSED SYSTEM WOULD TRANSMIT OVER THE SAME BANDWIDTH AT UP TO 48 KB/S, WITH NO GREATER INCREASE IN TRANSMITTED POWER (OR LINK BUDGET) THAN THAT REQUIRED FOR THE THREE-FOLD INCREASE IN DATA RATE. THE TECHNIQUE TO BE USED IS TRELLIS CODING WITH 8PSK AND 16PSK MODULATION. A UNIQUE CODING TECHNIQUE WHICH REQUIRES ONLY MODIFICATION OF EXISTING CONVOLUTIONAL CODERS-VITERBI DECODERS ACHIEVES THIS INCREASED EFFICIENCY.

* information listed above is at the time of submission.

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