Method of identifying an unknown system with a band-splitting adaptive filter and a device thereof
CA 2118654 C · Owner: Nec Corporation · Inventors: Sugiyama, Akihiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An object of the present invention is to offer an art of identifying an unknown system to provide less computation and a shorter convergence time by controlling the number of taps of the adaptive filter corresponding to each subband. The configuration of the present invention comprises: a step of splitting an input signal to an unknown system and generating a plurality of subband signals; a step of splitting an output signal from said unknown system and generating a plurality of subband reference signals; a step of filtering said subband signals with a plurality of adaptive filters and generating a plurality of replica signals corresponding to said subband reference signals; a step of …
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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 March 9, 1994 and granted August 4, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 9, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 9, 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.