Multiplex communications – Wide area network – Packet switching
Patent
1983-08-01
1986-01-28
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
371 43, H04J 300
Patent
active
045675910
ABSTRACT:
A digital audio satellite transmission system involving analog-to-digital conversion of audio signals, processing of such signals and transmission to and reception from a satellite transponder link. The digitized audio signal is digitally compressed to reduce the data rate. Several such signals are then time division multiplexed together. Differential encoding, bit interleaving and forward error correction coding is utilized to maintain high signal quality, together with binary phase shift key carrier modulation. Matched filter reception of the BPSK signal transmitted over a conventional satellite transponder link is provided together with BPSK demodulation, TDM demultiplexing, differential decoding, bit deinterleaving and threshold FEC decoding. The compressed digital signal is then expanded and converted to an analog audio signal.
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patent: 4208739 (1980-06-01), Lu et al.
patent: 4211996 (1980-07-01), Nakamura
IEEE Transactions on Communication Technology; vol. COM-19, No. 5, "A High-Speed Sequential Decoder: Prototype Design and Test"; Forney, Jr. et al., Oct. 1971, pp. 821-835.
IBM Journal of Research and Development; "Error Correcting Cones for Satellite Communication Channels"; Chen et al; Mar. 1976; pp. 168-175.
A. L. McBride, "Scientific-Atlanta's 3-Meter Digital Audio Terminal", (7 pages).
Satellite Communications Division, Scientific-Atlanta, Inc., "Proposal For Digital Audio Satellite Distribution for Network Radio 55TPO22A".
Scientific-Atlanta, Inc., "Satellite Distributed Digital Audio for Network Radio".
Brochure--"Digital Audio 3-Meter Earth Station", (2 pages).
Chamberlin James W.
Gray James S.
McBride Alan L.
Schreiner, III Peter G.
Olms Douglas W.
Scutch III Frank M.
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