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Rotation speed control method for OFDM receiver using rotating circular array antenna

In high-speed mobile OFDM communication systems, receiving characteristics are degraded badly by channel time variation. One solution is to rotate a circular array antenna so as to decrease the speed of the receiving antenna relative to the ground[1]. In the conventional approach[2], antenna radius was controlled to match vehicle speed, but realizing a radius control system is difficult. Our goal is to propose an easily implementable system based on rotating antenna. In this paper, we propose a method which controls the rotation speed of an antenna to avoid the effect of velocity change. Simulation results show the effectiveness of the proposed method.