Process to reduce ambiguity in a synthetic aperture radar and radar using such process
CA 2178997 C · Owner: Suinot, Noel · Inventors: Gouenard, Sophie; Suinot, Noel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a defocusing process for ambiguities relating to distance in pulsed radar specifically SAR type radar, including the following steps: - spreading the emitted pulsed radar according to a plurality of emitted wave frequency variation rules based on time said to be "chirps"; - alternating the chirp rules during the emission of successive impulsions between ascending and descending chirps in the frequency/time plane of the impulsion; compressing the echoes received by adapted filtration using a correlation operation between the received echo signal and the chirp rule applied at the moment of the emission of the impulsion which resulted in the said echo signal; the said …
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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 June 14, 1996 and granted January 15, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 14, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 14, 2018.
- 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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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.