Decision Feedback Equalizer (DFE) for QPSK Systems
In wireless communications, severe multipath propagation causes significant Inter-Symbol Interference (ISI). The Decision Feedback Equalizer (DFE) is currently the most commonly used equalizer for ISI cancellation. This MATLAB implementation demonstrates DFE operation with QPSK modulation, featuring feedforward and feedback filter components that mitigate both precursor and post-cursor ISI through adaptive algorithm implementations.