Transmission using an antenna array in a cdma communication system
CA 2833666 A1 · Owner: Interdigital Technology Corporation · Inventors: Mesecher, David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides for transmission and reception of a data signal using a plurality of transmitting antennas. Each antenna transmits a different pilot signal , having a pseudo random chip code sequence. A receiver filters each transmitted pilot , using that pilot's chip code. The filtered pilots are weighted and combined. Each pilot , signal's weight is adaptively adjusted in part on a signal quality of the combined signal , A data signal is transmitted such that different spread spectrum versions of the data , signal are transmitted from each transmitting antenna. Each version having a different , chip code identifier. Upon reception each version is filtered with its , …
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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 August 17, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 17, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 17, 2022.
- 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.