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1. (WO2018195722) OPTICAL RECEIVER AND DELAY ESTIMATION METHOD

Pub. No.:    WO/2018/195722    International Application No.:    PCT/CN2017/081706
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Tue Apr 25 01:59:59 CEST 2017
IPC: H04B 10/00
Applicants: HUAWEI TECHNOLOGIES CO., LTD.
华为技术有限公司
Inventors: LU, Yanzhao
卢彦兆
LI, Liangchuan
李良川
Title: OPTICAL RECEIVER AND DELAY ESTIMATION METHOD
Abstract:
An optical receiver and a delay estimation method. The optical receiver comprises: an analogue signal processor for carrying out photoelectric conversion processing on a received optical signal so as to obtain an electrical signal; a digital signal processor for carrying out time-frequency transform processing on the electrical signal so as to obtain a frequency domain signal; a delay estimator for acquiring, according to the frequency domain signal, a first sub-frequency domain signal of a co-phase component of the optical signal and a second sub-frequency domain signal of an orthogonal component of the optical signal, and according to the first sub-frequency domain signal and the second sub-frequency domain signal, calculating the phase difference between the co-phase component and the orthogonal component; and a delay compensator for using the phase difference to carry out delay compensation on the optical signal.