A technique for time alignment of uplink cdma signals
CA 2270607 A1 · Owner: Baines, Steven John · Inventors: Baines, Steven John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to communication systems and in particular relates to the time alignment of uplink CDMA signals. A simple approach for improving the performance of received CDMA signals is discussed. This consists of aligning the timings of users' signals such that the maximum output, power from a single rake finger for each user occurs simultaneously. This allows the timing to be adjusted for each user's signal independently of the others and has the effect of minimising any interference between users. The invention provides a time alignment mechanism which employs a minimum of signalling.
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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 3, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 3, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 3, 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.