首页|Low complexity Volterra nonlinear equalizer based on weight sharing for 50 Gb/s PAM4 IM/DD transmission with 10G-class optics
Low complexity Volterra nonlinear equalizer based on weight sharing for 50 Gb/s PAM4 IM/DD transmission with 10G-class optics
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NSTL
Elsevier
? 2021 Elsevier B.V.In this paper, an improved Volterra nonlinear equalizer with low computational complexity and good performance is proposed to compensate the distortions caused by bandwidth limitation and optical devices. The performance of the equalizer is improved by introducing one-hot encoding, and the complexity is reduced by using absolute operations and weight sharing based on k-means clustering. We employ the k-means clustering algorithm to replace some weights that are close in value with another similar weight, which greatly reduces the multiplications of this equalizer. Finally, we experimentally demonstrate a 50 Gb/s PAM4 IM/DD transmission with 10G-class optics using this proposed equalization scheme. The results show that, compared with the conventional 3rd-order Volterra nonlinear equalizer, the sensitivity of the proposed scheme is improved by > 2 dB, and the number of multiplication operations is reduced by ～81.2%.
Zhang Q.、Duan S.、Wang Z.、Cao B.、Wu Y.、Chen J.、Wang M.
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Key laboratory of Specialty Fiber Optics and Optical Access Networks Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication Shanghai University
NSTL
Elsevier
