Management of mimo communication systems

An apparatus of a cellular base station, comprising:

• a data storage device configured to store data corresponding to a first codebook and a second codebook, the first codebook different from the second codebook;
• and
• one or more processors configured to:
• precode reference signals to be transmitted to a user equipment (UE);
• and
• precode, using the second codebook, data streams on a common resource element to prevent the data streams from interfering with each other.

An apparatus of a Radio Access Network (RAN) node, comprising:

• a data storage device configured to store data corresponding to feedback information received from a UE;
• and
• processing circuitry configured to:
• estimate a utility function for different transmit parameter sets based on the feedback information received from the UE;
• and
• generate reference signals to be transmitted to the UE, the feedback information indicating information regarding measured signals measured by the UE responsive to transmission of the reference signals to the UE.

An apparatus of a user equipment (UE), comprising:

• a data storage device configured to store a first beamforming codebook and a second beamforming codebook that is different from the first beamforming codebook;
• and
• processing circuitry configured to:
• use the first beamforming codebook to reduce or compress dimensions of a receive beam space of a plurality of antennas of the UE;
• and
• use the second beamforming codebook to filter data bearing signals received from a cellular base station.

An apparatus of a user equipment (UE), comprising:

• a data storage device configured to store sample data indicating information measured from a uniformly sampled receive beam space;
• and
• one or more processors configured to:
• estimate one or more parameters of a plurality of receive beams of a codebook based on the stored samples;
• select a receive beam from a codebook based on the estimated one or more parameters;
• and
• receive data from a cellular base station using the selected receive beam.