A method for constructing a cyclic spectrum characteristic parameter extraction model and a method for identifying a signal modulation mode

A technology of characteristic parameters and signal modulation, applied in the field of communication, can solve the problems of inability to cover the signal modulation mode, complicated manual operation, etc., and achieve the effect of omitting redundant steps, reducing training time, and overcoming stationary noise.

Inactive Publication Date: 2019-05-28
HUAZHONG UNIV OF SCI & TECH
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[0005] Aiming at the defects of the prior art, the present invention provides a method for constructing a cyclic spectrum characteristic parameter extraction model and a signal modul...

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  • A method for constructing a cyclic spectrum characteristic parameter extraction model and a method for identifying a signal modulation mode
  • A method for constructing a cyclic spectrum characteristic parameter extraction model and a method for identifying a signal modulation mode
  • A method for constructing a cyclic spectrum characteristic parameter extraction model and a method for identifying a signal modulation mode

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[0039] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0040] figure 1 It is a schematic flow diagram for constructing a cyclic spectrum characteristic parameter extraction model disclosed in the embodiment of the present invention, which mainly includes the following steps:

[0041] (11) Input the modulated signal, and preprocess the modulated signal to obtain the cyclic spectrum.

[0042] In the communication process, the source signal undergoes periodic transformation, such as sampling, modulation, scanning, multiplication and encoding processing, and its statistical parameters will show periodic changes with time, that is, it has a cyclostationary...

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Abstract

The invention discloses a method for constructing a cyclic spectrum characteristic parameter extraction model and a method for identifying a signal modulation mode. The method comprises the followingsteps: preprocessing an input modulation signal to obtain a cyclic spectrum; Extracting characteristic parameters of the cyclic spectrum, and training, verifying and testing the CNN model by utilizingthe characteristic parameters to obtain a characteristic parameter extraction model; Inputting the modulation signal into a characteristic parameter extraction model to obtain a characteristic parameter sample set; Training an identification model by taking the characteristic parameter sample set as input and taking a corresponding modulation mode as output so as to obtain a signal modulation mode identification model; Inputting the to-be-detected signal into the characteristic parameter extraction model, inputting the output characteristic parameter into the signal modulation mode recognition model, and obtaining a signal modulation mode of the to-be-detected signal. According to the method, the CNN architecture is adopted to identify the signal modulation mode, and the characteristic extraction of the modulation mode is embedded into the convolutional neural network, so that the characteristics can be automatically extracted in the training process, and the identification of the signal modulation mode is realized.

Description

technical field [0001] The invention belongs to the technical field of communication, and more specifically relates to a method for constructing a cyclic spectrum characteristic parameter extraction model and a signal modulation mode identification method. Background technique [0002] With the advancement of communication technology and the development of various signal modulation methods, current broadband communication systems usually use different modulation methods and modulation parameters for signal modulation. The precondition for receiving and demodulating the signal is to know the modulation mode of the signal and its characteristic parameters, such as signal bandwidth, baud rate and so on. When the modulation method of both the sender and receiver is known, there is no modulation identification problem; but for the situation where the communication modulation method is unknown at the receiver, to demodulate the communication signal, modulation identification must ...

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Application Information

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IPC IPC(8): H04L27/00G06K9/46G06K9/62
Inventor 肖泳彭辉杰孙文华李强葛晓虎黄晓庆
Owner HUAZHONG UNIV OF SCI & TECH
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