Subspace combining of antenna beams in a mobile radio base site
CA 2217813 A1 · Owner: Radio Frequency System, Inc. · Inventors: Meredith, Sheldon Kent
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a cellular base site having a plurality of antennas and/or antenna beams for communication by voice channel radios all of the antennas and/or antenna, beams are divided into a first group including selected ones of the plurality ofantennas and/or antenna beams and a second group including the remaining antennas and/or antenna beams not in the first group. All of the RF signals received on the first group of antennas and/or antenna beams ate combined to form a first composite signal and all of the RF signals received on the second group of antennas and/or antenna beams are combined to form a second composite signal. The first composite signal is provided to one diversity input of a …
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 October 28, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 28, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 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.