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A packet telemetry system employing ARQ error controlA proposed packet telemetry system employing automatic retransmission request (ARQ) mode of error control is characterized. Limitations of the present multiplexing/demultiplexing approach are considered, and the use of the proposed system in near-earth satellites in the 1980s is suggested. Onboard processing and an adaptive multiplexing technique are described, as is an elastic buffer, required because the instantaneous data rate will be different from the telemetry transmission rate. The telemetry packets would be encoded into a powerful error-detection block code. A mechanism involving temporary buffering in a long shift register will permit retransmission request from the ground station for packets received in error. The ARQ mode of operation should ensure essentially error-free transmission at lower signal-to-noise ratios and at considerably higher transmission rates than are usually used.
Document ID
19780042289
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Greene, E. P.
(NASA Goddard Space Flight Center Greenbelt, Md., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1978
Subject Category
Space Communications, Spacecraft Communications, Command And Tracking
Meeting Information
Meeting: Data Management Symposium
Location: Huntsville, AL
Start Date: October 18, 1977
End Date: October 19, 1977
Accession Number
78A26198
Distribution Limits
Public
Copyright
Other

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