CDMA distributed antenna system for indoor wireless communications

This paper introduces an architecture and gives preliminary analysis of an indoor wireless CDMA communication system using a distributed antenna. The architecture is suitable to an environment affected by a large degree of shadowing. In such an environment if the data rate is not excessively high then due to the relatively small excess delays the channel exhibits relatively flat fading. The CDMA antenna concept is a means to artificially increase the excess delay so as to create frequency selective fading over the bandwidth of the transmitted signal, hence, frequency diversity is effectively achieved through the use of a Rake receiver. The architecture is applicable in scenarios where a leaky-feeder cable has traditionally been employed.