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Optical OFDM signal subcarrier modulation format recognition model training method, recognition method and device

A subcarrier modulation and format recognition technology, applied in the communication field, can solve the problems of poor universality and large amount of calculation, and achieve the effect of simplifying the operation process and improving the recognition efficiency

Active Publication Date: 2022-07-19
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] The embodiment of the present invention provides a training method, identification method and device for an optical OFDM signal subcarrier modulation format identification model to solve the problems of large amount of calculation and poor universality in the process of identifying the signal modulation format at the OFDM receiving end

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  • Optical OFDM signal subcarrier modulation format recognition model training method, recognition method and device
  • Optical OFDM signal subcarrier modulation format recognition model training method, recognition method and device
  • Optical OFDM signal subcarrier modulation format recognition model training method, recognition method and device

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[0087] Specific implementations include:

[0088] like figure 1 As shown, the constructed coherent optical OFDM transmission system includes: a random binary sequence generation module for generating random binary sequence signals. The constellation mapping module is used to map the random binary sequence signal to the complex point in the I / Q coordinate system according to the set modulation format to generate constellation symbols; wherein, the constellation mapping module can select BPSK, QPSK, 8QAM, 16QAM, 32QAM, 64QAM The six commonly used modulation formats modulate the transmitted data separately. The OFDM transmitting module is used to perform OFDM modulation on the constellation symbols and obtain modulated signals under various optical signal-to-noise ratio conditions, so as to use the modulated signals as training samples of the target modulation format identification model. The OFDM transmitting module may include an OFDM modulation module, two digital-to-analog ...

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Abstract

The present invention provides an optical OFDM signal subcarrier modulation format identification model training method, identification method and device. Amplitude distribution characteristics, compress and combine the in-phase component distribution histogram and the quadrature component distribution histogram to generate an I / Q component amplitude distribution histogram as input, and use the convolutional neural network to mine the I / Q component amplitude distribution histogram The implicit high-dimensional mapping relationship between the signal modulation format and the target modulation format recognition model obtained by training can determine the modulation format of the signal based on the amplitude distribution characteristics of the I / Q components, which greatly simplifies the operation process and improves the recognition efficiency. , to achieve more accurate detection of various modulation formats of OFDM modulated signals in a wider range of optical signal-to-noise ratio.

Description

technical field [0001] The present invention relates to the field of communication technologies, and in particular, to a training method, an identification method and a device for identifying a subcarrier modulation format of an optical OFDM signal. Background technique [0002] In today's society, with the deepening of the degree of informatization, various new Internet-based user experience forms have generated huge demand for communication traffic, causing a very heavy data bearing burden on the optical fiber transmission network. Therefore, high-speed and large-capacity backbone optical transmission systems will be the mainstream of next-generation network development. Optical orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) is a new modern transmission technology that combines optical fiber communication and orthogonal frequency division multiplexing. It has the advantages of high confidentiality, high anti-electromagnetic i...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/00H04L27/26G06N3/04G06N3/08
CPCH04L27/0012H04L27/2657G06N3/08G06N3/045
Inventor 忻向军田清华姚海鹏王甜王瑞春高然张琦胡鹏王光全付松年田凤李志沛杨爱英
Owner BEIJING UNIV OF POSTS & TELECOMM