Patent ID: 9059878
Filing Date: 2015-06-16
Classification: H04B,H04L

Abstract:
1. A method comprising: receiving at least one reference signal for an azimuthal portion of an array of antennas and at least one reference signal for an elevational portion of the array of antennas; determining a rank based on both the at least one reference signal for the azimuthal portion of the array of antennas and the at least one reference signal for the elevational portion of the array of antennas; determining an index of an azimuthal portion of a codebook based at least in part on the determined rank; determining an index of an elevational portion of the codebook based at least in part on the determined rank; determining channel quality information based at least on both the index of the azimuthal portion of a codebook and the index of the elevational portion of the codebook; and sending indications of at least the determined rank and the determined channel quality information.