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A method and device for realizing information demodulation in wavelength tag technology

A wavelength label and technology technology, applied in the field of optical communication, can solve the problems of interference, leakage, low efficiency of synchronous demodulation, etc., to achieve the effect of fine control and overcome low efficiency

Active Publication Date: 2017-12-08
ZTE CORP
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Problems solved by technology

[0006] The traditional wavelength label demodulation technology mainly uses the Fast Fourier Transform (FFT) algorithm to analyze the amplitude of the spectrum signal, but the wavelength label contains a large amount of low-frequency modulation label information, and there is still leakage between each other. interfere with
In order to accurately realize the demodulation of wavelength information, it is necessary to use a cyclic method to continuously sample a large amount of data on the tag signal, and then gradually adjust the sampling time window to a suitable position to obtain the synchronization head of the wavelength tag. The efficiency of synchronous demodulation is low and The shortcoming of wavelength label transmission information rate is slow, which is the problem of information demodulation synchronization

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  • A method and device for realizing information demodulation in wavelength tag technology
  • A method and device for realizing information demodulation in wavelength tag technology
  • A method and device for realizing information demodulation in wavelength tag technology

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[0040] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0041] Since the label uses a frequency at the modulation end to represent "1" and "0" in the information respectively (when there is a frequency within a period of time, it is represented as "1" in the digital information, and if the frequency does not exist, it represents the digital information "0" in the tag information, so as to realize the modulation of the tag signal), then the strength of the frequency can be calculated at the receiving demodulation end to judge the binary "0" and "1" in the tag information ("1" during demodulation means modulation There is a frequenc...

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Abstract

The present invention provides a method and device for realizing information demodulation in wavelength label technology. The method includes: sampling an optical signal with a wavelength label at a specified sampling rate; performing frequency analysis on the collected data to obtain the frequency spectrum of the wavelength label signal; Separate the spectrum of each modulation frequency from the spectrum of the wavelength label signal; calculate the average power spectrum of each modulation frequency in a specified time period in real time; respectively from a range that is larger than the specified multiple of the average power spectrum of each modulation frequency, Find the spectrum of the maximum value; obtain the synchronization head of the wavelength label corresponding to the modulation frequency according to the sampling time information corresponding to the spectrum of the maximum value. The invention utilizes the wavelength division multiplexing system of the wavelength label technology to realize the fine control of the modulation depth of the wavelength label signal, and overcomes the disadvantages of low efficiency of synchronous demodulation and slow information transmission rate of the wavelength label.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to a method and device for realizing information demodulation in the wavelength label technology. Background technique [0002] With the development of WDM (Wavelength Division Multiplex, wavelength division multiplexing), the current optical communication network can simultaneously transmit tens to hundreds of wavelengths of optical signals in the same optical fiber, and based on ROADM (Reconfigurable Optical Add-Drop Multiplexer (reconfigurable optical add-drop multiplexer) technology facilitates the on-demand configuration of each wavelength in optical communication, so that each wavelength in the optical network does not maintain the same path between two sites, or a certain wavelength does not Always assigned to a certain 2 sites. [0003] In order to carry out network topology identification and optical channel detection, it is possible to superimpose the low-frequency tu...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L12/70H04J14/02H04L12/721
Inventor 王军海
Owner ZTE CORP
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