Arria® V Device Handbook: Volume 2: Transceivers

ID 683573
Date 5/29/2020
Document Table of Contents

8.12. Decision Feedback Equalization

Decision feedback equalization (DFE) helps compensate for backplane attenuation because of insufficient bandwidth.

DFE works by estimating the intersymbol interference (ISI) that is imposed by the channel on an incoming bit and canceling out the ISI as that bit is sampled by the CDR circuitry. The advantage of DFE is that it boosts the power of the highest frequency component of the received data without increasing its noise power. Use DFE in conjunction with the transmitter pre-emphasis and receiver linear equalization.

Decision feedback equalization is supported by Arria V GZ devices and not Arria V GX and GT devices.