eam (in case of analog receive beamforming) during data and control reception [11]. The beams corresponding to the large antenna arrays are narrower and beam tracking may fail; therefore, beam recovery procedures have been specified in NR where a device can trigger a beam recovery procedure. Furthermore, a cell may consist of multiple transmission points, each transmitting its own beams; in that case, beam management procedures would allow device-transparent mobility for seamless handover between the beams of different transmission points. In addition, uplink-centric and reciprocity-based beam management is possible by utilizing uplink reference signals. The possibility of spatially separating users increases when using a large number of antenna elements in lower frequency bands in both uplink and downlink; however, this requires the knowledge of channel at the transmitter. In NR, extended support for such multi-user spatial multiplexing was introduced, either through high-resolution CSI feedback with a linear combination of DFT vectors, or uplink SRS improvements based on channel reciprocity. Moreover, support for distributed MIMO has been introduced, where the device can receive multiple PDCCHs and PDSCHs per slot to enable simultaneous data transmission from multiple transmission points to the same user [69]. The support of hybrid beamforming and high-resolution CSI feedback have been two impor- tant design principles in NR MIMO. The first goal is addressed by beam management, where a UE measures a set of analog beams for each digital port and reports the beam qual- ity. The gNB then assigns one or a small number of analog beams to the UE. As the down- link channel experienced by the UE changes, the gNB can modify this assignment, particularly when the link associated with the assigned beam fails. While beam management is instrumental in above 6 GHz frequency bands, it is also applicable to sub-6 GHz bands. For instance, in multipoint transmission scenario, where multiple transmission-reception points are asso