Location finding using a single base station in cdma/tdma systems
CA 2321395 A1 · Owner: Lucent Technologies Inc. · Inventors: Chen, Byron Hua; Tekin, Ibrahim; Chiang, Tung Ching
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A location or position of a wireless mobile unit is determined using only measurements from a single base station. A distance between the wireless mobile unit, and the base station is calculated utilizing a roundtrip delay value of an RF uplink, signal received from a wireless mobile unit. Thereafter an angle of arrival , of the, received signal is determined using measurements of the received signal from each of, a plurality of antenna sectors of a multi-sector antenna. The angle of arrival is, determined based upon stored antenna signal measurements of the multi-sector antenna, wherein a combination of different sector signal measurements corresponds, to a single angle measurement. …
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 September 28, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 28, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 28, 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.