Performance Analysis of Beam-Tracking Technique for IRS-assisted Cellular Systems

In this paper, performance of beam-tracking technique is evaluated for cellular systems with an intelligent reflective surface (IRS). A preamble design technique for IRS-assisted cellular systems is proposed using the complex conjugate property of the Zadoff-Chu sequence and reflecting nature of IRS. Moreover, a beam-tracking technique for mmWave cellular systems with a uniform planar array (UPA) is proposed to track the variation in angle of departure (AoD) using sub-panel structures of the UPA. Through simulation, it is demonstrated that the beam tracking technique with the proposed preamble can successfully track 2-D AoD trajectories of the base station and IRS.