For one embodiment, a MIMO (Multiple-Input-Multiple-Output) communication system where a first sequence of beamformed signals is transmitted, a beamformed channel is observed in response to transmission of the first sequence of beamformed signals, a QR decomposition of the observed beamformed channel...http://www.google.de/patents/US20070167192?utm_source=gb-gplus-sharePatent US20070167192 - Singular value decomposition beamforming for a multiple-input-multiple-output communication system
