Direction determination in cellular mobile communications network
CA 2265103 C · Owner: Speight, Timothy James · Inventors: Speight, Timothy James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In order to improve carrier to interference ratios on the down link in mobile communications networks it is proposed to transmit on the down link in a beam steered at the base station towards the mobile terminal. In order to do that it is necessary to know in which direction the mobile terminal is located. There is disclosed a method of ascribing a direction to the location of a mobile terminal from an antenna array. A sequence of symbols from each antenna in the array is stored. The, sequence contains a known training sequence. The sequence is space processed iteratively so as to produce the effect of the array having a major lobe in its polar diagram at a plurality of different successive …
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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 March 9, 1999 and granted April 15, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 9, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 9, 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.