Ofdm communication system with multiple ofdm symbol sizes
CA 2501458 C · Owner: Qualcomm Incorporated · Inventors: Ketchum, John W.; Howard, Steven J.; Walton, Jay Rodney
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
System traffic may be arranged into different categories (e.g. control data user data, and pilot data). For each category one or more OFDM symbols of the , proper sizes may be selected for use based on the expected payload size for the traffic in that category. For example control data may be transmitted , using OFDM symbols of a first size user data may be transmitted using OFDM symbols of the first size and a second size and pilot data may be transmitted , using OFDM symbols of a third size or the first size. In one exemplary design a small OFDM symbol is utilized for pilot and for transport channels used to send control data, and a large OFDM symbol and the small OFDM symbol are …
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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 October 27, 2003 and granted February 19, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 27, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 27, 2025.
- 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
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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.