Blind single-user array receiver for MAI cancellation in multipath fading DS-CDMA channels

In this paper, a blind subspace-type single-user array direct-sequence code division multiple access (DS-CDMA) receiver is proposed based on a new joint space-time channel estimation technique for frequency-selective channels. In the proposed approach, the spatio-temporal multipath channel parameters associated with the desired user are jointly estimated with the number of identifiable paths not limited by the number of antennas. Then these estimated parameters are employed to efficiently combine the desired multipath rays while, at the same time, (asymptotically) complete MAI cancellation is achieved.