System and method for narrowing the range of frequency uncertainty of a doppler shifted signal
CA 2335136 A1 · Owner: Harms, Brian · Inventors: Butler, Brian K.; Agrawal, Avneesh; Harms, Brian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system and method for narrowing the range of frequency uncertainty of a Doppler shifted pilot signal in a satellite or other communications system (100) with relative signal source and receiver motion. The satellite communications system (100) includes a user terminal (124 126) (for example, a mobile wireless telephone) a gateway (120, 122, 112) (terrestrial base station), and at least one satellite (116 118) with unknown position and , unknown relative velocity. The method includes the steps of shifting the pilot signal over a plurality of frequency hypotheses (309) coherently accumulating , samples of the pilot signal over a plurality of chips (315) measuring the , energy of the …
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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 14, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 14, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 14, 2021.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.