  Fifth-generation (5G) cellular networks are expected to exhibit at least
three primary physical-layer differences relative to fourth-generation ones:
millimeter-wave propagation, massive antenna arrays, and densification of base
stations. As in fourth-generation systems, such as LTE, 5G systems are likely
to continue to use single-carrier frequency division multiple-access (SC-FDMA)
on the uplink due to its advantageous peak-to-average power ratio. Moreover, 5G
systems are likely to use frequency hopping on the uplink to help randomize
interference and provide diversity against frequency-selective fading. In this
paper, the implications of these and other physical-layer features on uplink
performance are assessed using a novel millimeter-wave propagation model
featuring distance-dependent parameters that characterize the path-loss,
shadowing, and fading. The analysis proceeds by first fixing the location of
the mobile devices and finding the performance conditioned on the topology. The
spatially averaged performance is then found by averaging with respect to the
location of the mobile devices. The analysis allows for the use of actual
base-station topologies and the propagation model can leverage empirical
millimeter-wave measurements. The benefits of base-station densification,
highly directional sectorization, frequency hopping, a large available
bandwidth, and a high code rate are illustrated. The minor importance of
fractional power control is shown.
