Cdma chip synchronization circuit
CA 2223116 C · Owner: Sato, Toshifumi · Inventors: Sato, Toshifumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A CDMA chip synchronization circuit is provided for a mobile communications system employing a wide band CDMA method for example a direct spread code division multiple access (DS-CDMA) method. The circuit is designed to perform detection of multipath receiving timing particularly synchronous tracking, under a low Eb/No environment where multipaths are received in an overlapping manner. Herein a radio receiver converts radio frequency signals to digital base band signals and a search section detects receiving timing with respect to multipath components contained in the digital base band signals. The detected) receiving timing is used as a center position for receiving on a time axis. The …
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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 November 28, 1997 and granted January 8, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 28, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 28, 2019.
- 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.