Quantized eigen beams for controlling antenna array elements in a wireless network

An apparatus of an evolved Node B (eNB), the apparatus comprising:

• memory;
• and
• processing circuitry coupled to the memory, the processing circuitry configured to:
• decode Channel State Information Reference Signal (CSI-RS) received from a user equipment (UE) to derive a bit pattern of recommended eigen beams and at least one of a wideband channel quality indicator (CQI) or a subband CQI conditioned on the recommended eigen beams;
• calculate a precoder from the bit pattern of the recommended eigen beams;
• and
• encode a plurality of Orthogonal Frequency Division Multiple Access (OFDMA) signals with the bit pattern of the recommended eigen beams for transmission to the UE using the precoder.

A non-transitory computer-readable medium containing instructions which, when executed by a processor, perform operations to communicate channel state information from a user equipment (UE) to an Enhanced Node B (eNB) in a wireless network, the operations to arrange the UE to:

• derive one or more principal eigen beams from received Orthogonal Frequency Division Multiple Access (OFDMA) signals, the one or more principal eigen beams having a rank greater than or equal to one;
• derive quantized eigen beams from the one or more principal eigen beams;
• select, in response to the quantized eigen beams, a subset of antenna ports from a plurality of available antenna ports on the eNB;
• condition at least one of a wideband channel quality indicator (CQI) or a subband CQI on the quantized eigen beams;
• and
• provide a bit pattern of the quantized eigen beams and at least one of the wideband CQI or the subband CQI conditioned on the quantized eigen beams for transmission to the eNB via a Channel State Information Reference Signal (CSI-RS) using the selected subset of antennas.