A new adaptive equalizer for nonlinear channels

A study was made of the performance of four adaptive equalizers having a decision feedback equalizer (DFE) section for equalizing the received signal passing through a nonlinear channel. The nonlinear-DFE has simpler structure and less computations than the Volterra-DFE. Based on the simulation results, it is shown that the BER performance of a simple nonlinear-DFE is good enough compared with Volterra-DFE. The convergence of RAM-DFE is very slow and thus requires a very long training sequence. In many applications, the nonlinear-DFE is a very attractive structure for this application in channel equalization