Method and apparatus for receiving spread spectrum signal
CA 2276430 C · Owner: Nec Corporation · Inventors: Aoyama, Akio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
To synchronize spread spectrum (SS) signal with PN sequence, even when a Doppler frequency of fading is low. Delay profile combining means outputs a combined delay profile from delay profiles which are outputted from receiving units. Further, the synch chip timing which is obtained from the combined delay profile is fed commonly to receiving units for path diversity combining.
Read the whole patent
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 25, 1999 and granted March 25, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 25, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 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.