CHARACTERISTICS OF UWB/CDMA ADAPTIVE ARRAY ANTENNA SYSTEM EMBEDDING RAKE RECEPTION IN A MULTI-PATH FADING ENVIRONMENT

摘要

This paper proposes a novel adaptive UWB/CDMA array antenna system that makes the antenna pattern in the direction of the desired wave and does not make null in the direction of the undesired wave, and that employs RAKE reception. It is expected that the proposed system can make a more advantage directivity and can reduce the influence of multi-path fading. By computer simulations using two kinds of channel models, the effects of the RAKE reception and improvements of directivity by antenna patterns in multiple accesses are clarified on evaluation of D/U (Desired wave power / Undesired wave power).