New multitarget constant modulus array for CDMA systems

A new multitarget constant modulus array is proposed for CDMA systems based on least squares constant modulus algorithm The new algorithm is called pre-despreading decision directed least squares constant modulus algorithm (DDDLSCMA). In the new algorithm, the pre-despreading is first applied for multi target arrays to remove some multiple access signals, then the despreaded signal is processed by the algorithm which united the constant modulus algorithm and decision directed method. Simulation results illustrate the good performance for the proposed algorithm.