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RF/optical interference design for optical intersatellite linksA design approach for the RF/optical link interface for a data relay satellite is described. The flexibility of forward and return links in future data acquisition satellites in handling varying missions and data rates to 1 Gbit/s is considered. Attention is focused on requirements for the NASA Tracking and Data Acquisition System. System components are described including the return link multiplexer, the return link transmultiplexer, the forward link multiplexer, the forward link demultiplexer, and the frontside/backside switch. Ping-pong buffers, which provide rate buffering for each input data stream, are discussed and justification bits, which handle variations due to Doppler shift and local oscillator variation, are considered. The time-division multiplexed streams consist of a unique synchronization word for frame synchronization, and control words associated with each data burst to identify the presence or absence of a justification bit. Redundant data paths are described for both forward and return data streams.
Document ID
19910043922
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Garlow, Ronald K.
(COMSAT Laboratories Clarksburg, MD, United States)
Campanella, S. Joseph
(COMSAT Laboratories, Clarksburg, MD; George Washington University Washington, DC, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1990
Publication Information
Publication: COMSAT Technical Review
Volume: 20
ISSN: 0095-9669
Subject Category
Space Communications, Spacecraft Communications, Command And Tracking
Accession Number
91A28545
Funding Number(s)
CONTRACT_GRANT: NAS5-29128
Distribution Limits
Public
Copyright
Other

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