Optimum SINR receiver in dispersive CDMA channels

We address the problem of blind channel estimation and interference suppression for direct-sequence code division multiple access (DS-CDMA) systems over frequency-selective fading channels. The approach taken is based on our recently published work on the autocorrelation of contribution matrix (ACM) algorithm. We demonstrate that the receiver developed on the basis of the estimated channel through the ACM algorithm is asymptotically optimal in the sense that it maximizes the output signal to interference and noise ratio (SINR). A significant advantage of the proposed algorithm is that it tolerates both synchronization error in the desired user and multipath delay spread overestimation over a wide range of values.