A blind adaptive decorrelating detector for CDMA systems

The decorrelating detector is known to eliminate the multiaccess interference given that the signature sequences of the users are linearly independent, at the cost of enhancing the Gaussian receiver noise. In this paper, we present and study the convergence of a blind adaptive decorrelating detector which is based on the observation of the available statistics. The algorithm is iterative and distributed. Only two parameters are needed for the construction of the receiver filter of a user: the user's signature sequence and the variance of the white Gaussian receiver noise. The computational complexity of the proposed algorithm per iteration is linear in the number of users.