Path diversity using an adaptive array with directional antennas for high bit rate mobile communication systems

This paper proposes a new path diversity method using an adaptive array with directional antennas for high bit rate mobile communications. The proposed scheme selects some optimum elements from plural directional antennas based on the results of all delay profile estimation, and combines some outputs of the adaptive array for each delayed wave. Therefore, interference waves can be suppressed by this space-time processing approach with less processing power. Computer simulations show that the performance of the proposed scheme can be improved drastically by the path diversity combining method which minimizes mean square errors, even if delayed waves are incident from the same directions as a direct wave.