Blind RLS based space-time adaptive 2-D RAKE receivers for DS-CDMA communication systems

The goal of a blind two-dimensional (2-D) RAKE receiver for DS-CDMA is to c ancel strong multiuser access interference (MUAI) while optimally combining the signal of interest's (SOI) multipath. The weight vector yielding the o ptimum SINR for bit decisions may be computed as the "largest" generalized eigenvector of a matrix pencil composed of the SOI pins MUAI and MUAI alone space-time correlation matrices. An alternative blind 2-D RAKE receiver is presented based on RLS-type space-time adaptive filtering that offers comp etitive performance. The applicability of the scheme to the IS-95 uplink is addressed.