Code timing estimation using a spatial diversity for DS-CDMA communication systems

The problem of estimating code timings of DS-CDMA signals when using a multiple antenna sensor array which exploits spatial diversity is considered on a frequency selective fading channel. We propose an efficient implementation of an asymptotic maximum likelihood approach for joint estimation of multipath timings of a desired user´s signal on fading channels due to multipath propagation. The proposed algorithm is shown to work well in the presence of frequency selective fading and near-far environments