A Novel Decision Feedback Equalization Structure for Nonlinear High-Speed Links

IEEE Access

Na Li¹  Xiuqin Chu²  Yushan Li²  Yuhuan Luo²  Jun Wang²  Wenwu Wang³  Feng Wu³  Wenting Guo³ 

[1] Intel Corporation, Shanghai, China;Key Laboratory of High Speed Circuit Design and EMC Ministry of Education, Xidian University, Xi&x2019;an, China;

关键词: Decision feedback equalization (DFE);    inter-symbol interference (ISI);    multi-bit response;    nonlinearity;    signal integrity;   

DOI  :  10.1109/ACCESS.2020.2980376

来源: DOAJ

【 摘 要 】

As the degree of nonlinearity in high-speed links becomes more and more serious, traditional decision feedback equalization (DFE) which is based on linear time-invariant assumption can no longer eliminate the inter-symbol interference effectively. In this paper, the shortcomings of traditional DFE structure for nonlinear high-speed links are first analyzed. Then, the multi-bit response (MBR) method is proposed to accurately construct the bit stream responses of the nonlinear high-speed links. Lastly, a novel DFE structure based on the MBR method is presented to improve the signal quality of the nonlinear high-speed links. The accuracy of the proposed method is verified by the simulation based on a nonlinear high-speed link model. Compared with traditional DFE, the proposed DFE structure can significantly improve the signal quality of the nonlinear high-speed links. As the degree of nonlinearity increases, the advantage of the proposed DFE becomes more prominent.

【 授权许可】

Unknown