This paper introduces a nonlinear recursive least squares decision feedback equalizer (DFE). The nonlinearity is modeled using a bilinear system. Bilinear models are attractive because of its ability to approximate a large class of nonlinear systems efficiently. Results of computer simulation experiments that compare the performance of the bilinear DFE to two other alternatives, viz., a conventional DFE and a truncated Volterra DFE, in eliminating the intersymbol interference caused by a nonlinear channel are presented. The results demonstrate the superior performance of the bilinear DFE over the competing structures at least for the cases considered. >
['Gin-Kou Ma', 'Junghsi Lee', 'V.J. Mathews']
A RLS bilinear filter for channel equalization