NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Design of an MSAT-X mobile transceiver and related base and gateway stationsThis paper summarizes the results of a design study of the mobile transceiver, base station, and gateway station for NASA's proposed Mobile Satellite Experiment (MSAT-X). Major ground segment system design issues such as frequency stability control, modulation method, linear predictive coding vocoder algorithm, and error control technique are addressed. The modular and flexible transceiver design is described in detail, including the core, RF/IF, modem, vocoder, forward error correction codec, amplitude-companded single sideband, and input/output modules, as well as the flexible interface. Designs for a three-carrier base station and a 10-carrier gateway station are also discussed, including the interface with the controllers and with the public-switched telephone networks at the gateway station. Functional specifications are given for the transceiver, the base station, and the gateway station.
Document ID
19880052846
Document Type
Reprint (Version printed in journal)
Authors
Fang, Russell J. F. (Communications Satellite Corp. Clarksburg, MD, United States)
Bhaskar, Udaya (Communications Satellite Corp. Clarksburg, MD, United States)
Hemmati, Farhad (Communications Satellite Corp. Clarksburg, MD, United States)
Mackenthun, Kenneth M. (Communications Satellite Corp. Clarksburg, MD, United States)
Shenoy, Ajit (COMSAT Laboratories Clarksburg, MD, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1987
Publication Information
Publication: COMSAT Technical Review
Volume: 17
ISSN: 0095-9669
Subject Category
COMMUNICATIONS AND RADAR
Funding Number(s)
CONTRACT_GRANT: JPL-957113
Distribution Limits
Public
Copyright
Other