Efficient vector quantizer for FD-MIMO systems

A method of operating an eNode B (eNB) for processing of vector quantized feedback, the method comprising:

• transmitting, to a user equipment (UE), one or more control signals indicating a grouping method for grouping channel coefficients for vector quantization and a vector quantization codebook for vector quantization of grouped vectors;
• receiving one or more feedback signals from the UE;
• performing reconstruction of quantized channel coefficients identified from the one or more feedback signals using the indicated vector quantization codebook, wherein the channel coefficients based on at least one channel measurement;
• and
• ungrouping the reconstructed channel coefficients based on the indicated grouping method.

An apparatus of a user equipment (UE) for vector quantization of feedback components, the apparatus comprising:

• at least one processor configured to:
• identify a grouping method for grouping channel coefficients for vector quantization and identify a vector quantization codebook for vector quantization of grouped vectors based on one or more control signals received from an eNode B (eNB),
• compute channel coefficients based on at least one channel measurement,
• group the computed channel coefficients according to the identified grouping method to form a set of vectors,
• perform vector quantization of the vectors using the identified vector quantization codebook, and
• process the quantized vectors into one or more feedback signals;
• and
• a transceiver configured to transmit the one or more feedback signals to the eNB.

An apparatus of an eNode B (eNB) for processing of vector quantized feedback, the apparatus comprising:

• a transceiver configured to:
• transmit, to a user equipment (UE), one or more control signals indicating a grouping method for grouping channel coefficients for vector quantization and a vector quantization codebook for vector quantization of grouped vectors;
• receive one or more feedback signals from the UE;
• and
• at least one processor configured to:
• perform reconstruction of quantized channel coefficients identified from the one or more feedback signals using the indicated vector quantization codebook, wherein the channel coefficients based on at least one channel measurement, and
• ungroup the reconstructed channel coefficients based on the indicated grouping method.