Adjacent channel interference mitigation for fm digital audio broadcasting receivers
CA 2483856 A1 · Owner: Kroeger, Brian W. · Inventors: Kroeger, Brian W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of receiving an FM digital audio broadcasting signal including a first plurality of sub-carriers in a lower sideband of the radio channel comprises the steps of mixing the digital audio broadcasting signal with a local oscillator signal (112) to produce an intermediate frequency signal (114) through a bandpass filter (116) to produce a filter signal determining , if one of the upper and lower sidebands of the digital audio broadcasting signal is corrupted, and adjusting the local frequency oscillator signal (112) to change the frequency of the intermediate frequency (114) signal such that the bandpass filter (116) removes the sub-carriers in the upper or lower sideband that …
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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 April 21, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 21, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 21, 2025.
- 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.