Minimum-entropy Blind Acquisition/equalization for Uplink Ds-cdma

In this paper, we consider blind estimation of linear chip-spaced receivers for the demodulation of a particular short-code DS-CDMA mobile user under multipath propagation and in the absence of timing information. We propose a family of schemes for blind acquisition and equalization based on Donoho's Minimum Entropy principle and propose a speciic algorithm that uses the second-and fourth-order moments of a pre-whitened chip-rate received signal. The proposed algorithm can be considered a near-far resistant initialization procedure for, and application of, the Constant Modulus Algorithm (CMA) to DS-CDMA.