Generalised decision feedback equalisation of digital communication channels

The concept of generalised decision feedback equalisation (g.d.f.e.) is introduced. Nonlinear equalisers operating according to this principle can outperform the decision feedback equaliser (d.f.e.) when the linear feedforward prefilter does not quite compensate for channel precursors. Two g.d.f.e. structures are derived from the Kalman filter equaliser (k.f.e.). Some simulation results are presented which allow the performance of the g.d.f.e. structures to be compared with that of the d.f.e. and of the k.f.e.