Technique for increasing the rain margin of a satellite communic

Details Technique for increasing the rain margin of a satellite communic Technique for increasing the rain margin of a satellite communic

1979-06-22

1982-01-05

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370104, 371 5, 455 12, H04J 316

Patent

active

043097642

ABSTRACT:
The present invention relates to a technique for increasing the rain margin at ground stations of a satellite communication system. In the present technique, spare TDMA time slots in each frame sequence are shared among all ground stations as required by stations experiencing a fade condition which exceed a predetermined power margin. Additional up-link power margin at a faded transmitter can be achieved by either increasing power transmission of a normal burst or by the use of spare time slots plus encoding and preamble field extension techniques for burst extension. Additional down-link power margin to a faded receiver is accomplished by either increased transmitter power transmission or by the use of burst extension and coding and field extension techniques. Apparatus for implementing framing, carrier and clock recovery and start of message detection using extended fields and coding techniques for other data at a transmitter and receiver and disclosed to overcome fade conditions.

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patent: 4047151 (1977-09-01), Rydbeck et al.
Datamation, Jul. 1978, "The Future of Commercial Satellite Telecommunications" by White et al., pp. 94-102.
Conference Record of the 26th Convention of Nuclear Electronics and Aerospace; Rome, Italy, Mar. 9-18, 1979, "Technical Aspects in the Future Development of Satellite Communication Systems" by Carassa, pp. 22-42.

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