Subspace methods in linear DS-CDMA detection

Abstract

The paper brings some major points of application of signal subspace methods in linear mean square error (MSE) detectors of direct sequence CDMA signals. Focusing on the cross-spectral (CS) method, its origin and a relation to multistage Wiener filter (MWF) is shown. This filter results from splitting of correlation matrix to the shape which does not contain the inversion of the initial correlation matrix.