Derivation of eigenvectors for spatial processing in mimo communication systems
CA 2809768 C · Owner: Qualcomm Incorporated · Inventors: Ketchum, John W.; Wallace, Mark S.; Gaal, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Techniques for deriving eigenvectors based on steered reference and used for spatial processing. A steered reference is a pilot transmission on one eigenmode of a MIMO channel per symbol period using a steering vector for that eigenmode. The steered reference is used to estimate both a matrix .SIGMA. of singular values and a matrix U of left eigenvectors of a channel response matrix H. A matrix U with orthogonalized columns may be derived based on the estimates of .SIGMA. and U e.g. using QR factorization, minimum square error computation be used for matched filtering of data transmission received via a first link. The estimate U of or the matrix U may also be used for spatial processing of …
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 December 9, 2003 and granted February 18, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 9, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 9, 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
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.