A new nonlinear equalizer for mobile radio channels

An adaptive nonlinear equalizer for time-dispersive mobile radio channels is introduced. The resulting equations show that it can be viewed as a soft decision feedback equalizer (DFE) and as an extension of the Kalman (hard) DFE introduced by S. McLaughlin et al. (1989). However, the derivation of the equalizer follows in its essential parts different ideas. The performance of the algorithm is compared with the performances of several other equalizers, including an optimal, fixed estimation delay equalizer, which can be set up easily using a state-space description of the communications channel