Spread spectrum correlator
CA 2102601 C · Owner: Vanderpool, Jeffrey S. · Inventors: Dixon, Robert C.; Vanderpool, Jeffrey S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for decoding a received spread spectrum signal having a data signal modulated with a pseudo-noise, code and transmitted as an RF spread spectrum signal. A first reference register holds a first pseudo-noise signal (22) a, second reference register holds s second pseudo-noise signal (25) and a , receive-register holds a received spread spectrum signal (27). A first modulo adder (26) adds each chip of the received spread spectrum signal with each respective chip of the first pseudo-noise signal, thereby generating a first plurality of chipcomparison signals. A first summer adds the first plurality of chip-comparison signals, generating a first correlation signal The comparator …
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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 May 7, 1991 and granted January 23, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 7, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 7, 2013.
- 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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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.