Carrier recovery system
CA 2264350 C · Owner: Aman, Ahmad K. · Inventors: Farrow, Cecil William; Jiang, Hong; Webb, Charles Albert Iii
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A digital carrier recovery system includes at least two modes of operation namely, an acquisition mode and a tracking mode. The bandwidth of the carrier recovery loop filter is different for the acquisition mode and the tracking mode. In the, acquisition mode, the digital phase-locked loop seeks and locks to the long term, frequency offset of the received carrier signal. In the tracking mode the , digital , phase-locked loop tracks the instantaneous variations in the carrier phase. Switching between, the acquisition mode and the tracking mode is realized digitally and includes, programmable hysteresis, resulting in optimal performance in the presence of signals, having high levels of …
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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 4, 1999 and granted October 15, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 4, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 4, 2021.
- 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.