Earth station transmission power control system for keeping an eirp of down link signals constant irrespective of weather
CA 1196961 A · Owner: Nippon Electric Co. Ltd. · Inventors: Oshima, Goro; Shimada, Yasuhisa; Ono, Satoru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an earth station (11) an amplifier (15) amplifies, a pilot information signal with a variable gain. An up link pilot is thereby transmitted with a controllable transmission power. A beacon receiver (28) detects a level or C/N with which a beacon signal emitted by a satellite reaches the station. A pilot receiver (33) detects a level or C/N for a down link pilot radiated by the satellite in response to the up link pilot. A controller (37) controls the gain to keep a ratio between the levels or C/N's constant. For keeping a similar ratio constant another station may transmit a transmission signal with a likewise controllable transmission power and receive the down link pilot together with …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted November 19, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 19, 2002.
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Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.