15/03/2016
The ever-increasing levels of wireless-
communication traffic in recent years
have consequently led to increasing
demand for more communication
frequencies. Utilization of the
millimeter wave (mmWave) band
represents a key technology for the
development of the heterogeneous
networks (HetNets) [1] that will be
used for 5th generation wireless
cellular networks (5G). However, the
application of mmWaves to mobile
communications is generally
considered to be difficult because of
the short communication range
associated with these waves as a
result of the high attenuation of radio
power in the mmWave band. For
outdoor applications of mmWaves in
particular, one major difficulty is how
to avoid the effects of rain, which can
dramatically reduce the transmitted
radio-wave power. For mobile
applications of mmWaves, the
significance of this problem is that
network operators must strive to avoid
the effects of low data throughput in
commercial mobile devices with
maximum data rates of several
hundred Mbps, which are much lower
than the multi-Gbps data rate of a
typical mmWave-based wireless
device, while also increasing frequency
usage efficiency using multilevel
modulation in these wireless devices.
The ever-increasing levels of wireless-
communication traffic in recent years
have consequently led to increasing
demand for more communication
frequencies. Utilization of the
millimeter wave (mmWave) band
represents a key technology for the
development of the heterogeneous
networks (HetNets) [1] that will be
used for 5th generation wireless
cellular networks (5G). However, the
application of mmWaves to mobile
communications is generally
considered to be difficult because of
the short communication range
associated with these waves as a
result of the high attenuation of radio
power in the mmWave band. For
outdoor applications of mmWaves in
particular, one major difficulty is how
to avoid the effects of rain, which can
dramatically reduce the transmitted
radio-wave power. For mobile
applications of mmWaves, the
significance of this problem is that
network operators must strive to avoid
the effects of low data throughput in
commercial mobile devices with
maximum data rates of several
hundred Mbps, which are much lower
than the multi-Gbps data rate of a
typical mmWave-based wireless
device, while also increasing frequency
usage efficiency using multilevel
modulation in these wireless devices.Tokyo Tech, Sony, JRC
and KDDI Labs have
jointly developed a 40
GHz and 60 GHz wave-
based high-throughput
wireless access networkThe ever-increasing levels of wireless-
communication traffic in recent years
have consequently led to increasing
demand for more communication
frequencies. Utilization of the
millimeter wave (mmWave) band
represents a key technology for the
development of the heterogeneous
networks (HetNets) [1] that will be
used for 5th generation wireless
cellular networks (5G). However, the
application of mmWaves to mobile
communications is generally
considered to be difficult because of
the short communication range
associated with these waves as a
result of the high attenuation of radio
power in the mmWave band. For
outdoor applications of mmWaves in
particular, one major difficulty is how
to avoid the effects of rain, which can
dramatically reduce the transmitted
radio-wave power. For mobile
applications of mmWaves, the
significance of this problem is that
network operators must strive to avoid
the effects of low data throughput in
commercial mobile devices with
maximum data rates of several
hundred Mbps, which are much lower
than the multi-Gbps data rate of a
typical mmWave-based wireless
device, while also increasing frequency
usage efficiency using multilevel
modulation in these wireless devices.
