Adaptive receiving device for antennas
CA 2261841 C · Owner: Nec Corporation · Inventors: Maruta, Yasushi; Ushirokawa, Akihisa; Yoshida, Shousei
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The adaptive receiving block 2k for the k-user generates a receiving signal by the k-th user the m-th pass inherent antenna directivity pattern respectively obtains the k-th, user demodulation signal by demodulating and adding for each pass simultaneously and outputs weight control error signal e' kl~e'km for the purpose of forming directivity pattern for each pass. The weight control error synthesis circuit 3 optionally synthesizes weight control error signal e'kl~e'kM and outputs synthesis weight control error signal e kl~e kM. Synthesizing weight control error signals with respect to passes whose arrival directions of multi-pass of each user are close, performing a control without …
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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 February 12, 1999 and granted January 22, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 12, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 12, 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
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.