Diversity transmission modes for mimo ofdm communication systems
CA 2490520 C · Owner: Ketchum, John W. · Inventors: Ketchum, John W.; Walton, Jay R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Techniques for transmitting data using a number of diversity transmission modes to improve reliability. At a transmitter for each of one or more data , streams a particular diversity transmission mode is selected for use from among a number of possible transmission modes. These transmission modes may include a frequency diversity transmission mode a Walsh diversity , transmission mode, a space time transmit diversity (STTD) transmission mode and a Walsh-STTD transmission mode. Each diversity transmission mode redundantly transmits data over time, frequency space, or a combination , thereof. Each data stream is coded and modulated to provide modulation symbols, which are further …
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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 June 20, 2003 and granted November 19, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 20, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 20, 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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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.