PAM4符号対応CTLEの補償量設計法の検討

カテゴリ: 論文誌(論文単位)

グループ名: 【C】電子・情報・システム部門

発行日: 2022/01/01

タイトル(英語): CTLE Compensation Design Methodology for PAM4 Signals

著者名: 霜田　幸長（岐阜大学大学院自然科学技術研究科），生田　和也（岐阜大学工学部），林　宏太（岐阜大学大学院自然科学技術研究科），伊藤　大輔（岐阜大学大学院自然科学技術研究科），中村　誠（岐阜大学大学院自然科学技術研究科）

著者名(英語): Yukinaga Shimoda (Graduate School of Natural Science and Technology, Gifu University), Kazuya Ikuta (Faculty of Engineering, Gifu University), Kota Hayashi (Graduate School of Natural Science and Technology, Gifu University), Daisuke Ito (Graduate School of Natural Science and Technology, Gifu University), Makoto Nakamura (Graduate School of Natural Science and Technology, Gifu University)

キーワード: 光受信器，PAM4符号，CTLE，電気分散補償回路　　optical receiver，PAM4 signal，CTLE，EDC

要約(英語): The 400GbE standard has been established to treat the increasing Internet traffic because of IoT devices and teleworking. In the 400GbE, PAM4 codes are adopted in addition to conventional NRZ codes. For a high-speed, long-haul, and complex modulated communication, a waveform signal is degraded by an optical dispersion on a fiber. The receiver utilizes electrical dispersion compensators (EDCs) to compensate for waveforms degraded by transmission lines. Continuous-time linear equalizers (CTLEs) are widely used in EDCs because of their small circuit size. EDCs with CTLEs are studied actively for PAM4 optical communication systems. We propose a CTLE design methodology based on a step response analysis. Appropriate compensation ranges for PAM4 signals are derived by the transfer function of degradation and CTLE mathematical models. From the verification results of circuit simulations with CTLEs designed by the proposed methodology, we have clarified the appropriate CTLE compensation strength for degraded waveform signals. It is possible to design a suitable CTLE for PAM4 signals using the proposed methodology.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.142 No.1 （2022） 特集：電子回路関連技術

本誌掲載ページ: 2023/01/05 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejeiss/142/1/142_1/_article/-char/ja/