On Fixed Beamforming in Sectored mmWave Ultra Dense Networks at 73GHz

We investigate the use of fixed analogue
transmit beamforming for downlink communication in
millimetre-wave (mmWave) band ultra-dense networks
(UDNs) at 73GHz. Our simulation study is based on 3D
radiation patterns using a real design of large planar
antenna arrays with different horizontal beamwidths and
full characterisation of interference. The effects of network
densification are captured through different ratios of the
number of access points (APs) to the number of users. We
quantify the system’s performance by evaluating outage
and achievable rate. The results show that users with rates
around the mean benefit more from the densification than
from narrowing the beamwidth, but for users with low
rates, narrow beams also provide a significant increase in
throughput.