Method and apparatus for multiuser-interference reduction
CA 2179979 C · Owner: International Business Machines Corporation · Inventors: Eleftheriou, Evangelos; Petersen, Brent Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention concerns an apparatus and method for reducing the multiuser-interference of input signals. The apparatus in accordance with the present invention comprises a multivariate predictor (81) and a decision quantizer (82), said multivariate predictor (81) operating on interference signals <u></u>'(D) provided by means for extracting interference signals (83), said interference signals <u></u>'(D) being obtained from said input signals and output signals <u>b</u>(D) which are available at an output of said decision quantizer (82) and fed back from there to said means for extracting interference signals (83).
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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 10, 1994 and granted July 3, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 10, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 10, 2016.
- 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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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.