Efficient computation of spatial filter matrices for steering transmit diversity in a mimo communication system
CA 2727876 C · Owner: Qualcomm Incorporated · Inventors: Walton, Jay Rodney; Howard, Steven J.; Wallace, Mark S.
Overview
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Techniques for efficiently computing spatial filter matrices are described. The channel response matrices for a MIMO channel may be highly correlated if the channel is relatively static over a range of transmission spans. In this case an initial spatial filter matrix may be derived based on one channel response matrix and a spatial filter matrix for each transmission span may be computed based on the initial spatial filter matrix and a steering matrix used for that transmission span. The channel response matrices may be partially correlated if the MIMO channel is not static but does not change abruptly. In this case a spatial filter matrix may be derived for one transmission span and used …
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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 27, 2005 and granted July 8, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 27, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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