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An Optical Receiver and Its Delay Estimation Method

A technology of delay estimation and optical receiver, which is applied in the field of communication, can solve the problems of estimating optical receiver and not proposing orthogonal delay, etc., and achieve the effect of reducing compensation complexity and improving accuracy

Active Publication Date: 2020-12-22
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there is no optical receiver that can better estimate the quadrature delay in the prior art

Method used

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  • An Optical Receiver and Its Delay Estimation Method
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  • An Optical Receiver and Its Delay Estimation Method

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Embodiment Construction

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0038] In the following, some terms used in the embodiments of the present invention are explained to facilitate the understanding of those skilled in the art.

[0039] (1) Optical Line Terminal (OLT) is an important central office equipment. The OLT is connected to the front-end equipment, such as the aggregation layer switch, through a network cable, and the OLT is connected to the optical splitter at the user end through a single optical fiber. The OLT can implement functions such as control, management, and distance measurement on user end equipment, wherein one type of user end equipment is, for example, an optical network unit (Optical Network Unit, ONU). And the OLT can convert the received electrical signal into an o...

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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.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of communication, and in particular to an optical receiver and a delay estimation method. Background technique [0002] With the rapid expansion of data communication services, the requirements for transmission bandwidth and capacity of optical fiber transmission systems are getting higher and higher. At present, the 100G-Wavelength Division Multiplexing (WDM) transmission system has been commercialized on a large scale, and the single-wave transmission rate will evolve to single-wave 400Gbps or even 1Tbps in the next step, and high-order modulation and high symbol modulation rate can be used Improve the single-wave transmission rate, but in the coherent detection system, both high-order modulation and high-symbol modulation rate have higher requirements on the delay between the in-phase component and the quadrature component (In-phase and quadrature, IQ). Among them, if The modula...

Claims

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Application Information

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IPC IPC(8): H04B10/60
CPCH04B10/00
Inventor 卢彦兆李良川
Owner HUAWEI TECH CO LTD