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Method and device for estimating dispersion

A dispersion and estimated value technology, applied in the field of dispersion estimation methods and devices, can solve the problems of low dispersion estimation speed and large time consumption

Active Publication Date: 2022-06-28
HUAWEI TECH CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, this method needs to scan all possible dispersion values, which consumes a lot of time, and the speed of dispersion estimation is not high

Method used

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  • Method and device for estimating dispersion
  • Method and device for estimating dispersion

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Embodiment Construction

[0065] In the embodiments of the present application, words such as "exemplary" or "for example" are used to represent any embodiment or solution described as "exemplary" or "for example" in the embodiments of the present application It should not be construed as preferred or advantageous over other embodiments or arrangements. Rather, the use of words such as "exemplary" or "such as" is intended to present the related concepts in a specific manner. The terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

[0066] In the existing dispersion estimation method, by scanning all possible dispersion values ​​of the optical signal, the order of magnitude may reach tens of thousands, and dispersion compensation is performed according to each dispersion value scanned to obtain the optical signal after dispersion compensation, and the smallest PAPR is obtained. The dispersion value corresponding to the ...

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Abstract

The present application provides a dispersion estimation method and device. Including: obtaining the first optical signal and the second optical signal, the first optical signal and the second optical signal are optical signals propagated through two channels or two sub-carriers of joint transmission, and determining the first optical signal and the second optical signal The relative propagation delay of the second optical signal, the relative propagation delay is the relative propagation delay between the first training sequence inserted into the first optical signal and the second training sequence inserted into the second optical signal, the second The position of a training sequence in the first optical signal is the same as that of the second training sequence in the second optical signal. According to the relative propagation delay between the first optical signal and the second optical signal and the two channels The interval between two subcarriers determines the dispersion estimate. The speed of dispersion estimation can thus be increased.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular, to a method and apparatus for estimating dispersion. Background technique [0002] Optical communication systems are widely used in data communication. Optical communication systems can include: an optical transmitter, a channel (including an optical fiber), and an optical receiver. The optical transmitter can encode data onto an optical signal, and the channel can transmit the optical signal from the optical signal. The optical signal is transmitted to the optical receiver, and the optical receiver can restore the data from the received optical signal. Due to the different group velocities of optical signals of different frequencies, the optical pulses are broadened, and the dispersion of the optical fiber will occur. The dispersion will increase the noise received by the optical receiver. Therefore, digital signal processing (DSP) of the optical receiver is...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/2513H04B10/61
CPCH04B10/2513H04B10/6161H04B10/61
Inventor 张娟易鸿刘思明
Owner HUAWEI TECH CO LTD