Adaptive-directivity transmission apparatus and adaptive-directivity transmission method
CA 2301089 C · Owner: Yukitomo, Hideki · Inventors: Hiramatsu, Katsuhiko; Takakusaki, Keiji; Yukitomo, Hideki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A diversity receiver estimates a reception weight using signals received at a plurality of antennas a, target pattern former forms a target radiation pattern based on the estimated reception weight a transmission, pattern former forms a transmission radiation pattern with a transmission weight using an arbitrary transmission weight as an initial value a controller, limits an angle range in which formation of the target radiation pattern and formation of the transmission radiation pattern are executed, an error detector detects an error between the target radiation pattern and the transmission radiation pattern and subjects the, detected error to logarithmic transformation an updator, …
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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 and granted December 23, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term 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.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.