An analytic solution for blind channel and carrier offset estimation in multiuser CDMA

We investigate the problem of CDMA multiuser detection in the presence of a small residual carrier offset. We propose, in particular, a method based on the generalized eigenvalue problem for efficiently estimating the channel response and the carrier offset. A closed-form solution is obtained without any knowledge of the transmitted symbols. Simulation results are given to verify the validity of the proposed method. It is shown that the proposed method can achieve a similar or better performance but with a reduced computational complexity as compared to a previous algorithm which uses a polynomial matrix projection property.