Method and device for the demodulation of satellite radio navigation signals
CA 2529197 C · Owner: Centre National D'Etudes Spatiales · Inventors: Ries, Lionel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method and device for the demodulation of satellite radio navigation signals. The inventive method is used to demodulate radio navigation signals (s(t)) transmitted in spread spectrum and comprising a data channel which is modulated by a navigation message and a pilot channel which is not modulated by a navigation message, said data and pilot channels being combined into one multiplexing scheme in order to modulate a carrier. The method consists in: subjecting the signals of the pilot and data channels to despreading processing; and demodulating the despread data signal (r d) in order to obtain the navigation message (d(t)), whereby the demodulation of …
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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
- Filed June 3, 2004 and granted February 5, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 3, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 3, 2026.
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Timeline
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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.