Surface wave radar
CA 2901610 C · Owner: Telstra Corporation Limited · Inventors: Abramovich, Yuri; Ellard, Robert M.; Turcaj, Pavel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A surface wave radar system including a receive antenna array (20 22) for generating receive signals, and a data processing system (24) for processing received data representing the receive signals to mitigate ionospheric clutter. The received data is range and Doppler processed and a spatial adaptive filter (52) is trained using training data selected from the processed data. The training data includes ionospheric clutter data and excludes cells which contain target data and substantial sea clutter. The processed data is filtered using the filter (52) which may be based on loaded sample matrix inversion. The antenna array (20,22) may be two-dimensional having an L or T shape.
Read the whole patent
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 November 12, 2002 and granted May 1, 2018. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 12, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 12, 2024.
- 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.