Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1975-06-23
1976-10-26
Griffin, Robert L.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
3401461AL, 3401461AQ, 3401461AV, H04L 110
Patent
active
039886778
ABSTRACT:
A space communication system incorporating a concatenated Reed Solomon Viterbi coding channel is disclosed for transmitting compressed and uncompressed data from a spacecraft to a data processing center on Earth. Imaging (and other) data is first compressed into source blocks which are then coded by a Reed Solomon coder and interleaver with parameters J=8, E=16, I=16, followed by a convolutional encoder of parameters k=7, .nu.=2. The received data is first decoded by a Viterbi decoder, followed by a Reed Solomon decoder and deinterleaver. The output of the latter is then decompressed, based on the compression criteria used in compressing the data in the spacecraft. The decompressed data is processed to reconstruct an approximation of the original data-producing condition or images.
REFERENCES:
patent: 3831143 (1974-08-01), Trafton
Hybrid Coding Systems Study--J. P. Odenwalder et al.--Linkabit Corp. Sept. 1972--NASA CR 114,486, Final Report.
"Practical Applications of Coding"--I. M. Jacobs, May 1974--IEEE Trans. on Info. Theory vol. IT-20, No. 3--pp. 305-310.
"Burst Correcting Codes for the Classic Bursty Channel"--G. David Forney, Jr. Oct. 1971--IEEE Trans. on Comm. Tech., vol. COM-19 No. 5, pp. 772-780.
"A Hybrid Coding Scheme for Discrete Memoryless Channels"--D. D. Falconer Mar. 1969 BSTJ pp. 691-702, 716-718.
Fletcher James C. Administrator of the National Aeronautics and Space
Hilbert Edward E.
Rice Robert F.
Bookbinder Marc E.
Griffin Robert L.
Manning John R.
McCaul Paul F.
Mott Monte F.
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