A signal correlation technique for a spread spectrum receiver to reduce multipath errors
CA 2266498 A1 · Owner: Veitsel, Victor · Inventors: Sila-Nivatisky, Stanislov; Kamgar, Farbod; Veitsel, Victor
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A receiver of a radio frequency signal having a pseudo-random noise (PRN) code modulated on a carrier, and techniques of processing such a signal that are especially adapted for ranging applications. Such an application is in a global positioning system (GPS or GLONASS) receiver. Both of the receiver DLL code and PLL carrier loops include a loop component that senses an error in its main loop caused by the presence of a multipath signal. The main loop is continuously adjusted by this sensed error thereby causing the loop to track , more precisely and minimize the effect of the multipath signal. The result is a more accurate range measurement.
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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 September 19, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 19, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 19, 2019.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.