Applying Decision Feedback Equalization to oversampled data

1. How is decision feedback equalization carried out?
2. What are the filters used in decision feedback equalizer?
3. What is DFE in Matlab?

How is decision feedback equalization carried out?

The Decision Feedback Equalizer (DFE) is a form of non-linear equalization which relies on decisions about the levels of previous symbols (high/low) to correct the current symbol. This allows the DFE to account for distortion in the current symbol that is caused by the previous symbols.

What are the filters used in decision feedback equalizer?

The conventional DFE is based on linear filters (i.e. both equalizers in forward and feedback paths are linear filters).

What is DFE in Matlab?

dfe = comm. DecisionFeedbackEqualizer( Name , Value ) sets properties using one or more name-value pairs. For example, comm. DecisionFeedbackEqualizer('Algorithm','RLS') configures the equalizer object to update tap weights using the recursive least squares (RLS) algorithm.