Channelization code allocation for radio communication systems
CA 2295813 A1 · Owner: Ovesjo, Fredrik · Inventors: Ovesjo, Fredrik; Dahlman, Erik
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Variable spreading factors and multi-code transmissions are flexibly accomodated by assigning spreading codes in accordance with the described techniques. Spreading codes are assigned so that the control channel is orthogonal to all physical channels in the composite spread spectrum signal. Power balance between in-phase (I)and quadrature (Q) branches in the transmitter is also provided by assigning physical channels to appropriate branches and splitting physical channels where necessary.
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 July 3, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 3, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 3, 2020.
- 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.