A digital filter for iq-generation, noise shaping and neighbour channel suppression
CA 2347857 A1 · Owner: Wildhagen, Jens · Inventors: Wildhagen, Jens
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polyphase filter of order x ~ N that is building N allpass filters of order x ~ N, according to the present invention has a structure of an allpass filter of order, x comprising delay elements with a delay 1 and at least one multiplier wherein all delay elements with a delay of 1 are replaced by delay elements with a delay of N and the sampling rate of fs' = fs/N with fs being the sampling rate of the input signal. Preferably the multiplier included in the structure of the allpass filter of order x comprises N-time multiplex multiplication coefficients that are used in, a predetermined order. (Fig. 1)
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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 May 16, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 16, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 16, 2023.
- 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.