Cross-polarization canceler/equalizer
CA 1259385 A · Owner: American Telephone And Telegraph Company · Inventors: Foschini, Gerard J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a crosspolarization equalizer/canceler which simultaneously performs cross-polarization equalization/cancellation in a tapped delay line (TPL) matrix. More particularly the, present equalizer/canceler receives the first and second orthogonally polarized digital signals on separate paths which are each split into a straight through and crossover paths that include a TDL matrix comprising a separate IDL, with a predetermined number of complex taps in each, of the paths. The individual complex taps are appropriately adjusted in response to control signals from a tap adjusting means which derives the appropriate control signals from current tap signals and …
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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
- Granted September 12, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 12, 2006.
- 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.