Asymmetric adaptive modulation in a wireless communication system
CA 2871979 C · Owner: Wi-Lan, Inc. · Inventors: Arviv, Eli; Stanwood, Kenneth; Zimmerman, Ofer
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
On embodiment of the system and method provides asymmetric adaptive modulation which allows uplink and downlink subframes (304 302, respectively) of data to be transmitted between a base station (102) and a CPE (104) with different modulation schemes thus increasing the efficiency of downlink transmissions while maintaining the stability of uplink transmissions. In systems with multiple CPEs each CPE (104) and base station (102) pair can independently select their uplink and downlink modulation techniques. The system and method are also adaptive in that they adjust the modulation schemes based on for example, signal to noise ratio measurements or bit error rate measurements.
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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 19, 2002 and granted August 6, 2019. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 19, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 19, 2024.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.