ADVANCED INTERFERENCE REJECTION
In addition to D2D capabilities and massive volumes
of memory, future mobile devices may also
have varying form factors. In some instances, the
devices might accommodate several antennas
with the consequent opportunity for active interference
rejection therein, along with beamforming
and spatial multiplexing. A joint design of
transmitter and receiver processing, and proper
control and pilot signals, are critical to allow
advanced interference rejection. As an example,
in Fig. 5 we show the gains obtained by incorporating
the effects of nonlinear, and intra- and
inter-cluster interference awareness into devices
with one, two, and four antennas.
While this section has mainly focused on analyzing
the implications of smarter devices at a
component level, in the previous section we discussed
the impact at the radio access network
architecture level. We regard smarter devices as
having all the characteristic of a disruptive technology
for 5G, and therefore we encourage
researchers to further explore this direction.