ed CSI report, which may include CRI, which is used to indicate a preferred CSI-RS resource from a configured set since different CSI- RS resources in the set can be differently precoded, rank indicator (RI), CQI, and PMI. The CRI, RI, CQI, and PMI are associated with resource selection (when a UE measures multi- ple CSI-RS resources), the number of dominant downlink channel directions, sustained spectral efficiency or related SINR values, and the dominant channel directions chosen from a codebook of vectors or matrices. Since CSI requirements for different operational modes are different, the CSI reporting settings can include different CSI components for CSI acquisition (see Fig. 4.40 and Table 4.12). The UE measures the spatial channel between itself and the serving base station using the CSI-RS transmitted from the gNB transmit antenna ports in order to generate a CSI report. The UE then calculates the CSI-related metrics and reports the CSI to the gNB. Using the reported CSIs from all UEs, the gNB performs link adaptation and scheduling. The goal of CSI measurement and reporting is to obtain an approximation of the CSI. This can be achieved when the reported PMI accurately represents the dominant channel eigenvector(s), thereby enabling accurate beamforming. The standard-resolution (Type I) CSI utilizes a dual-stage codebook with precoding matrix W = W1W2 incorporating a wideband W1 matrix that is common for all subbands, captur- ing long-term channel characteristics, and a subband W2 matrix representing fast fading properties of the channel. In this context a subband comprises multiple consecutive resource blocks. Type I codebooks support up to rank 8, that is, the rank indicator RI {1, 2, Designed for Npanel panels of dual-polarized arrays, the W1 matrix factor is constructed from 2Npanel blocks of two-dimensional DFT matrices. The W2 matrix selects a subset of DFT vectors from W1 and applies phase shifts (taken from the phase shift keying alphabet) New Radio Access Physical Layer Aspects (Part 2) 503 acro