Method and apparatus for generating a channel state information report

Abstract

An apparatus and method provide for receiving, from a network node, a set of reference signals. A set of beams are identified based on the set of reference signals. A subset of coefficients with non-zero values are determined from a set of coefficients, each coefficient of the subset of coefficients being associated with a pair of values comprising an amplitude value and a phase value, each coefficient of the set of coefficients corresponding to a respective beam of the set of beams for each respective layer of the set of layers and a respective frequency-domain index of a set of frequency domain indices for each layer of the set of layers. The set of layers are partitioned into a plurality of groups of layers. A beam bitmap vector is generated for each group of the plurality of groups of layers, the beam bitmap vector indicating a subset of beams of the set of beams within the layer-group, the subset of beams being associated with the subset of coefficients. A coefficient bitmap vector is generated for each beam of the subset of beams for each group of the plurality of groups of layers, the coefficient bitmap vector indicating a respective frequency domain index associated with each of the subset of coefficients. A channel state information (CSI) report comprising the beam bitmap vector is transmitted to the network node for each group of the plurality of groups of layers, the coefficient bitmap vector for each beam of the subset of beams, or a plurality of pairs of coefficient values corresponding to the subset of coefficients, each pair of the plurality of pairs of coefficient values comprising a respective amplitude value and a respective phase value.