Abstract: With the continuous advancement  of information technology,wireline data rates have expe-rienced a significant leap from 112 Gbit/s to 224 Gbit/s.The increase in data rates has raised the complexity requirements for SerDes receiver equalizers.To address timing constraints and other issues brought about by complex equalizer structures,a sliding block decision feedback equalizer based on a lookahead structure is proposed.The design incorporates a 6-tap feedforward equalizer (FFE) and a 9-tap decision feedback equalizer (DFE) for digital signal processing.Functional validation is conducted through MATLAB simulation modeling.The results show that at a data rate of 112 Gbit/s,under channel attenuation ranging from 8 dB to 35 dB,this digital signal processing design,which utilizes a least mean squares (LMS) adaptive equalization algorithm,can effectively reduce the bit error rate (BER).The BER performance meets the discrimination requirements of KP4 forward error correction (FEC) and demonstrates superior performance compared to traditional equalizer structures.

Key words: feedforward equalizer, decision feedback equalizer, lookahead structure, adaptive equalization