The use of 5G millimetre wave (mm-wave) for high mobility communications is of particular interest for future autonomous vehicles. Such applications will increasingly rely on vehicle-to-vehicle (V2V) and vehicle-to-everything (V2X) communication systems that is capable of offering low latency and high data rates to convey time critical information. Although high directivity beamforming antenna arrays can be employed to enable a reliable link between the transmitter and the receiver, there is always Doppler shift associated with motion in a vehicular channel which may cause performance degradation in these communication scenarios. In particular, mm-wave channel is inherently sensitive to the environment and to any vibration of the mounting of user equipment (TIE) will induce additional carrier and waveform modulation. However, the directive beam formed by a phased array antenna offers spatial filtering of the environment, thereby reducing the impact of Doppler effect, but could potential magnify the impact of vibration and antenna mis-pointing as the beamwidth is decreased. This paper reports recent results obtained from a series of outdoor mm-wave channel measurements representing vehicular like operation at 26 GHz and analysis of the associated Doppler shift observed versus the half power beamwidth of a phased array antenna used to emulate the antenna facet of V2V or V2X wireless links.
|Title of host publication||IET Antennas and Propagation Conference 2019 (APC-2019)|
|Publication status||Published - 12 Nov 2019|