New blind start-up scheme to decision-directed MMSE algorithm for CDMA receivers

This paper addresses the problem of blind start-up scheme to the decision-directed MMSE algorithm for CDMA receivers. A new blind start-up scheme is proposed. It is based on a new code-aided blind algorithm that adopts an approximate MSINR criterion. Furthermore, it is capable of utilizing the detected data symbols of the users that previously entered the net and have switched to the normal data transmission stage. Analyses and simulation studies show that the proposed algorithm significantly improves the detection performance and capacity as comparing to the existing algorithms, and, if further utilizing these detected data symbols, is comparable in performance to the BMMSE algorithm with known channel.