A new calibration method of adaptive array for TDD systems

This paper proposes a new calibration method for adaptive base station antennas that is suitable for TDD communication systems; it offers real-time calibration. The effectiveness of the proposed calibration method is also demonstrated using an experimental adaptive array testbed. This paper first shows the distortion in the radiation pattern due to the amplitude and phase variations over time. The proposed calibration method is then described. Finally, a comparison of the measured radiation pattern between transmission and reception modes is shown that confirms the effectiveness of the proposed calibration method.