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1. (WO2017063158) CIRCUIT AND METHOD FOR ACQUIRING PAM4 DECODING THRESHOLDS AND OPTICAL NETWORK UNIT

Pub. No.:    WO/2017/063158    International Application No.:    PCT/CN2015/091937
Publication Date: Fri Apr 21 01:59:59 CEST 2017 International Filing Date: Thu Oct 15 01:59:59 CEST 2015
IPC: H04L 27/00
Applicants: HUAWEI TECHNOLOGIES CO., LTD.
华为技术有限公司
Inventors: LI, Shengping
李胜平
GAO, Bo
高波
Title: CIRCUIT AND METHOD FOR ACQUIRING PAM4 DECODING THRESHOLDS AND OPTICAL NETWORK UNIT
Abstract:
The invention relates to the technical field of communications. Disclosed in an embodiment of the invention are a circuit and method for acquiring PAM4 decoding thresholds and an optical network unit for increasing accuracy of decoding thresholds, and reducing complexity in realizing a circuit. The decoding thresholds comprise Vth1, Vth2 and Vth3, and Vth1, Vth2 and Vth3 satisfy the following condition: Vth1 < Vth2 < Vth3. The circuit comprises a mean value module and a microprocessor. After determining that a signal inputted to the mean value module is a target signal, the microprocessor collects a target decoding threshold obtained by performing, by the mean value module, mean value computation on received voltages of symbols in the target signal. When the target signal is a first signal, the target decoding threshold is Vth1, and the first signal comprises a symbol representing 00 and a symbol representing 01; and/or when the target signal is a third signal, the target decoding threshold is Vth3, and the third signal comprises a symbol representing 10 and a symbol representing 11. The technical solution provided in the embodiment of the invention is applicable to a scenario for acquiring PAM4 decoding thresholds.