Concurrent constant modulus algorithm and decision directed scheme for synchronous DS_CDMA equalisation

In this paper, we derive a concurrent constant modulus algorithm (CMA) and decision directed (DD) scheme for blind multiuser equalization-suitable for downlink DS-CDMA systems. Adaptation is performed by concurrently minimizing two cost functions based on either a CM criterion or a DD scheme for all active users. Computer simulations are used to assess the performance of the algorithm