What is FDE (Frequency Domain Equalization)?

Frequency domain equalizers (FEQs) have been applied widely in multicarrier frameworks. It is used to improve transmission rate by decreasing transmit redundancy. The proposed equalization algorithm can eliminate intersymbol and intercarrier interference (ISI and ICI) brought about by the decrease or the shortfall of this redundancy by appropriately exploiting null subcarriers that are inherent in standardized multicarrier frameworks.