  This paper investigates the system-level performance of dynamic point
selection (DPS) and non-coherent joint transmission (NC-JT) coordinated
multi-point transmission (CoMP) schemes under different 5G NR deployment
scenarios using state-of-the-art system-level simulations. It is observed that
at a mid-band carrier frequency, NC-JT does not provide performance gains over
DPS or single transmission/reception point (TRP) transmission unless the
channel from a TRP is rank deficient. Therefore, benefits with NC-JT are more
likely to be found in indoor deployment scenarios where the TRPs are typically
equipped with only 2 transmit antenna ports, whereas benefits are less likely
to be observed in macro-cell deployments where TRPs typically have a larger
number of antennas ports. It is further observed that NC-JT gains tend to
diminish with increasing system load, partly due to increased interference,
which typically lowers the transmission rank.
