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Expired Canadian patentCanada

Transmitter directed code division multiple access system using multi-users diversity to maximize throughput while equitably providing access to users

CA 2514809 C · Owner: Bhushan, Naga · Inventors: Chaponniere, Etienne Francois; Bhushan, Naga; Black, Peter J.

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Abstract From the Canadian patent

A transmitter directed, distributed receiver using multi-user diversity provided by the distribution of the receiver. Advantage is taken of the uncorrelated variations over time in the condition of communication links between a common transmitter and several users. The greater the variation in the quality of a particular link over time the greater the increase in total , system throughput provided. An scheduler metric (or scheduler metric) represents the instantaneous quality of the communication link between each user and the transmitter with respect to the average quality of the link. Alternatively, the scheduler metric represents the instantaneous channel condition with respect …

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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 2, 2004 and granted October 2, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 2, 2024.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 2, 2026.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 2, 2004
GrantedOctober 2, 2012
Term endedFebruary 2, 2024
Patent numberCA 2514809 C
Classification (IPC)H04B7/00

Timeline

Timeline From CIPO dates

2005200720092011201320152017201920212023Application filedFeb 2, 2004Patent grantedOct 2, 2012Term endedFeb 2, 2024

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.