  Beam alignment for millimeter wave (mm Wave) vehicular communications is
challenging due to the high mobility of vehicles. Recent studies have proposed
some beam switching techniques at Road Side Unit (RSU) for vehicle to
infrastructure (V2I) communications, employing initial position and speed
information of vehicles, that are sent through Dedicated Short Range
Communications (DSRC) to the RSU. However, inaccuracies of the provided
information lead to beam misalignment. Some beam design parameters are
suggested in the literature to combat this effect. But how these parameters
should be tuned? Here, we evaluate the effect of all these parameters, and
propose a beam design efficiency metric to perform beam alignment in the
presence of the estimation errors, and to improve the performance by choosing
the right design parameters.
