Performance of DS-CDMA system with smart antenna for different bandwidths in the wideband multipath channel

In this paper, the performance of DS-CDMA system with smart antenna is analyzed for different bandwidths (1.25 MHz, 5 MHz) and different channel environments (rural, urban). For the analysis of DS-CDMA system with smart antenna, the vector channel having spatio-temporal correlation is modeled as a time-variant linear filter in time, and each multipath is assumed as a reflective wave from only one direction (only one cluster) in space. Several multipaths within one chip are distinguished into each one and the strongest signal is elected. DS-CDMA system with smart antenna using wider bandwidth presents better performance than that using narrow bandwidth. It is shown that smart antenna is more effective in urban area when using 2D-RAKE receiver.