Secondary radar message decoding
CA 2791233 C · Owner: Raytheon Systems Limited · Inventors: Stevens, Martin; Jones, Quentin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for determining a value of each bit in a seconds radar response pulse train sampled at a bit rate greater than one sample per bit is provided. The received signal is sampled repeatedly over a bit period. A scale factor for a weighting function is defined based on the amplitude levels detected from the response preamble. The weighting function has a maximum positive value at the expected bit amplitude for the first half of the bit period and decays to zero at higher amplitudes so that the effect of very large samples will be negligible. For lower amplitudes the weighting decays to zero at the threshold level and becomes increasingly negative until zero amplitude. In …
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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 March 8, 2005 and granted October 27, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 8, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.