Elastic optical network modulation format recognition method and system based on improved PSO clustering

Abstract

The invention provides an elastic optical network modulation format recognition method and system based on improved PSO clustering, and belongs to the technical field of communication. The core idea of the method comprises: firstly, mapping a received signal to an s2-s3 plane of a Stokes space to generate a corresponding grayscale picture; then performing clustering on the grayscale picture by using an improved PSO algorithm to recognize the number of clusters; and finally recognizing the modulation format of a unknown signal through matching with a template. According to the method, a variable-view (a range in a circle around a particle) is added on the basis of a traditional PSO algorithm, so that a particle swarm is automatically clustered in the view range, and the number of a plurality of clusters on a grayscale picture is searched. According to the invention, multiple modulation formats used by the elastic optical network can be intelligently, rapidly and stably recognized, and the method has the advantage of high tolerance to laser frequency offset and line width.

Description

technical field [0001] The invention belongs to the technical field of optical fiber communication, and in particular relates to an elastic optical network modulation format identification method and system based on improved PSO clustering. Background technique [0002] As the basis of modern communication technology, optical communication is the most active field of information communication at present. With the growth and changes of people's demand for communication services, optical networks are also evolving. Current wavelength division multiplexing (wavelength division multiplexing, WDM) networks are difficult to adapt to service requests of different granularities, and cannot make full use of network bandwidth resources. To solve these problems, build a digital, software-based, and fully dynamic elastic optical network (EON) to achieve flexible allocation of channel resources. On the one hand, the optical spectrum needs to be able to be divided flexibly, and the spect...

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Problems solved by technology

However, the above scheme uses an expensive spectrometer and requires higher hardware costs

The prior art also includes firstly mapping the signal after dispersion compensation to the Stokes space for polarization alignment operation, and secondly by judging the different cluster numbers and series characteristics of different MF signals in the two-dimensional Stokes plane, Thus the modulation format is identified, but the MFI accuracy rate is not 100%

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