Pilot filtering in the presence of phase discontinuities in a cdma receiver
CA 2355837 A1 · Owner: Bender, Paul E. · Inventors: Butler, Brian K.; Motiwala, Quaeed; Agrawal, Avneesh
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel and improved method and apparatus for coherent demodulation in the presence of phase discontinuities is described. The pilot signal is prepared for optimal coherent demodulation by the use of two filters: one capable of withstanding the effects of phase discontinuity; a second providing superior filtering performance than the first so long as phase discontinuities are not present. Both filters are simultaneously operated. In the exemplary embodiment of the present invention, a sliding window filter (410) is employed for the superior performing filter absent phase discontinuity and a block filter (440) is employed for use when phase discontinuities are present.
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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 January 11, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 11, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 11, 2022.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.