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A demodulation method and device

A demodulation method and signal modulation technology, applied in the field of space optical communication, can solve the problems of low demodulation accuracy

Active Publication Date: 2021-02-05
BEIJING UNIV OF POSTS & TELECOMM
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a demodulation method and device to solve the problem of low demodulation accuracy

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  • A demodulation method and device

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Embodiment Construction

[0080] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0081] The embodiment of the present invention discloses a method for demodulating orbital angular momentum, which will be described in detail below.

[0082] see figure 1 , figure 1 It is a schematic flowchart of a demodulation method provided by an embodiment of the present invention, and the method includes the following steps 101-103.

[0083] Step 101, obtain the OAM intensity map of the received modulated signal as the intensity map to be identified. ...

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Abstract

An embodiment of the present invention provides a demodulation method, which relates to the field of space optical communication technology, wherein the method includes: obtaining the OAM intensity map of the received modulated signal as the intensity map to be identified; inputting the intensity map to be identified The pre-trained OAM pattern recognition model recognizes the OAM pattern based on the modulation signal, wherein the first initial model of the OAM pattern recognition model is: a model obtained by modifying the number of neurons in the fully connected layer of the discriminant network model, and the discriminant network The model is a model obtained through training combined with a generative network model; the modulated signal is demodulated according to the identified OAM mode. When the solution provided by the embodiment of the present invention is used for signal demodulation, the accuracy of demodulation can be improved.

Description

technical field [0001] The present invention relates to the technical field of space optical communication, in particular to a demodulation method and device. Background technique [0002] Space optical communication can improve spectrum utilization efficiency, increase communication capacity, and meet people's increasing demand for information. In space optical communication, the traditional OAM (Orbital Angular Momentum, orbital angular momentum) demodulation method is: obtain the hologram of the received modulated signal, load the obtained hologram on the holographic phase screen, and according to the The position of the bright spot and the orthogonality of the OAM mode determine the OAM mode on which the received modulated signal is obtained, and then demodulate the received modulated signal according to the determined OAM mode. Although signal demodulation can be realized by applying the above method, the above demodulation method needs to use physical instruments such...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/516H04B10/548G06N3/04
CPCH04B10/516H04B10/548G06N3/045
Inventor 田清华忻向军张琦李哲刘博李良川田凤常天海王拥军王光全杨雷静卢琛达王阔
Owner BEIJING UNIV OF POSTS & TELECOMM