POLARIZATION DELAYED DISTRIBUTED ANTENNA SYSTEM FOR CDMA MOBILE COMMUNICATIONS

摘要

FIELD OF THE INVENTION The present invention relates to code division multiple access mobile communication (CDMA) systems, and more particularly to polarized delay distributed antenna systems having significant diversity capabilities without the need for complicated receivers.;In general, fading in mobile communication has a significant effect on system performance. As a representative countermeasure against fading, a spatial diversity technique can be considered. Spatial diversity is generally very strong in fading, but it is often difficult to install in base stations as well as in mobile stations such as mobile phones, which must be miniaturized in an environment with a large spatial fading correlation coefficient such as a typical micro cell. In this case, a conventional polarization diversity can be considered. In the polarization diversity, as in the case of spatial diversity, it must have a complicated receiver structure. In addition, in a situation where a small reception delay is not available in a CDMA system due to low signal delay in a small cell, overcoming this is more urgently needed.;Accordingly, the present invention proposes a polarized delay distributed antenna system capable of reducing fading by using a distributed transmitter method using vertical and horizontal polarization of a transmission antenna in order to have a considerable diversity function without requiring a complicated receiver.