Automatic equalizer for phase-modulated data transmission systems

Abstract From the Canadian patent

An incoherent adaptive transversal equalizer for the receiver of a differentially phase-modulated data transmission system wherein a pair of tapped delay lines are located in memory of a digital computer or central processor which performs equalization of a sampled data signal according to the mean-square error algorithm defined by equations (1) - (4). In-phase and quadraturephase tap gains c-n and d-n are each selectively combined with both the in-phase and quadrature-phase sampled signal component words Ak+n and Bk+n , respectively, at associated tap lines of the delay lines (except the principal or center tap line where n = O here), to produce a plurality of weighted tap signals c-n …