NBs or many transmit panels. The typical CPE caused by the phase noise rotates the constellations by a limited margin, SO only the higher order modulation schemes are impacted by the CPE. The users with higher MCS receive good SNR levels and are usually located closer to the gNB. When the MU-MIMO users are grouped, there will be higher and lower MCS users in these groups. If the PT-RS is transmitted without power boosting and with a wider beam than the narrow-beam data transmissions, the received EIRP for the PT-RS will be lower relative to the data transmissions. The lower MCS users that are generally further away from the cell center will receive PT-RS with a much lower effective power and will be able to discard PT-RS as interference, that is, they will not need CPE correc- tion. They will be able to request the gNB to allocate data within these resource elements trans- mitted through narrow-beams. The same resource elements are used for the PT-RS in the wider beam transmissions for the benefit of higher MCS users, for whom the same resource elements will not be utilized in the narrow-beam data transmissions. With this effective power discrimi- nation, non-orthogonal multiplexing of PT-RS and data is possible for the MU-MIMO config- urations, which effectively increases the system spectral efficiency [54]. In CP-OFDM uplink, the precoded phase-tracking reference signal for subcarrier k on layer j is given by r'pT-Rs(p,m) =[(1-2c(2m)) = +j(1-2 1))]/2 if p=p or p=p" where antenna ports p' or (p',p") are associated with PT-RS transmission. The pseudo-random sequence initialized 2Nnscid + nscid] mod 231, in which l is the OFDM symbol number within the slot, nslot is the slot number within a frame, and NID, N1D E {0, 1, 65535} are given by the higher layer para- meters scramblingID0 and scramblingID1, respectively. The parameter NSCID E {0, may be signaled through the DM-RS initialization field of DCI format 0_1; otherwise, NSCID = 0 [6]. The UE transmits PT-RSs (if configured) only in the resource blocks designate