Cdma multiuser receiver featuring a combination of array antenna and multiuser cancelers
CA 2258376 C · Owner: Ushirokawa, Akihisa · Inventors: Yoshida, Shousei; Ishii, Naoto; Ushirokawa, Akihisa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In order to effectively reduce a size of a CDMA multiuser receiver while maintaining an excellent interference cancellation an array antenna is , combined with a, multiuser receiver. The multiuser receiver includes signal processing means which is, supplied with incoming signals received at the array antenna. The signal processing, means estimates interfering signals with respect to each of the antenna elements and, with respect to each of simultaneously accessing users.
Read the whole patent
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 8, 1999 and granted October 1, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 8, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 8, 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.