Multiuser MIMO: Principle, Performance in Measured Channels and Applicable Service. - Gerhard Bauch 001; Pedro Tejera; Christian Guthy; Wolfgang Utschick; Josef A. Nossek; Markus Herdin; Jorgen Nielsen; Jørgen Bach Andersen; Eckehard G. Steinbach; Shoaib Khan (VTC Spring, 2007)