Robust decision feedback equalizers

Design equations are presented for robust and realizable decision feedback equalizers, for IIR (infinite impulse response) channels with colored noise. Given a probabilistic measure of model uncertainty, the mean MSE (mean square error), averaged over a whole class of possible models, is minimized. A second type of robustification, which reduces the error propagation due to the feedback, is also introduced. The resulting design equations define a large class of equalizers, with DFEs (decision feedback equalizers) and linear equalizers based on nominal models being special cases.<>