A novel adaptive two-stage detector for synchronous DS-CDMA communication systems

A novel adaptive two-stage multiuser detector is proposed for synchronous DS-CDMA communication systems. This new multiuser detector employs the first-order approximate decorrelating detector as the first stage followed by an adaptive canceller. The steepest descent algorithm is used to control the weights of the adaptive canceller. Through analysis and numerical results, we show that the proposed detector results in a better error probability than that of the conventional detector and the decorrelating detector, especially when the multiple access interference (MAI) is high.