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OSNR measurement method, device and system based on digital signal processing

A digital signal processing and measurement method technology, applied in transmission systems, electromagnetic wave transmission systems, electrical components, etc., can solve problems such as interpolation methods that cannot be applied to wavelength division multiplexing systems with high spectral efficiency

Inactive Publication Date: 2020-12-04
WUHAN POST & TELECOMM RES INST CO LTD
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Problems solved by technology

[0004] The embodiment of the present application provides an OSNR measurement method, device and system based on digital signal processing to solve the problem that the interpolation method in the related art cannot be applied to links with optical filter devices and wavelength division multiplexing systems with high spectral efficiency technical problem

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  • OSNR measurement method, device and system based on digital signal processing
  • OSNR measurement method, device and system based on digital signal processing
  • OSNR measurement method, device and system based on digital signal processing

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Embodiment Construction

[0055] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, but not all of them. Based on the embodiments in the present application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present application.

[0056] see figure 1 and figure 2 As shown, the application provides a kind of OSNR measuring method based on digital signal processing, and it comprises steps:

[0057] S1: Use an equalizer to perform adaptive filtering on the two coherently received electrical signals;

[0058] S2: extract equalizer coefficients, and obtain the cur...

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Abstract

The invention relates to an OSNR measurement method, device and system based on digital signal processing. The method comprises the following steps: carrying out adaptive filtering processing on two groups of coherently received electric signals by using an equalizer; extracting an equalizer coefficient, and obtaining a current Stokes vector for describing the polarization state of the optical signal according to the equalizer coefficient; obtaining a current polarization state evaluation parameter according to the Stokes vector; and obtaining a current OSNR value according to a relational expression between a preset polarization state evaluation parameter and an optical signal-to-noise ratio OSNR. The OSNR measurement method based on digital signal processing provided by the invention notonly is simple and efficient, but also can be suitable for links with optical filters and wavelength division multiplexing systems with high spectral efficiency, and is wide in application range.

Description

technical field [0001] The present application relates to the technical field of coherent optical communication systems, in particular to an OSNR measurement method, device and system based on digital signal processing. Background technique [0002] At present, optical communication is developing towards higher speed, larger capacity, and longer distance, and coherent optical communication is being used more and more widely. While increasing the channel capacity and increasing the transmission rate, the performance monitoring of coherent optical signals has become particularly important. OSNR (optical signal to noise ratio, optical signal to noise ratio) is the ratio of optical signal to noise. It is an important parameter to evaluate the performance of optical network. It can directly reflect the quality of signal. A primary indicator of link quality. [0003] The traditional OSNR measurement method is the interpolation method, that is, the linear interpolation value of t...

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Application Information

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IPC IPC(8): H04B10/079
CPCH04B10/07953
Inventor 张旭李海波曾韬孟令恒
Owner WUHAN POST & TELECOMM RES INST CO LTD
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