BEAM SET FOR CHANNEL STATE INFORMATION FEEDBACK IN MIMO SYSTEMS

Systems and methods are provided that involve the design and use of beam sets for CSI feedback that are customized for to a given environment, for example, a room, a hallway, an outdoor area, an indoor area. This can have the effect of reducing the number of beams within the beam set that are used to represent the downlink channel of a UE in a given environment, with a corresponding reduction in the overhead to feedback CSI. A customized beam set, once determined, is configured on a given UE using signalling. A UE that makes channel measurements on a received reference signal uses the channel measurements to obtain a set of beamforming weights for the customized beam set and sends the weights back to the network as CSI.