Communication signal modulation mode identification method

A modulation method identification and communication signal technology, applied in the field of communication, can solve the problems of low signal identification rate and limited types of signal identification, and achieve the effect of obvious signal characteristics, overcoming the limited identification types and simplifying steps.
CN110417694AInactive Publication Date: 2019-11-05JILIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JILIN UNIV
Publication Date
2019-11-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a communication signal modulation mode identification method, which overcomes the problems of low identification rate and limited identification types under a low signal-to-noise ratio, and comprises the following steps of: 1) forming a set of known signals: (1) segmenting the known signals; (2) performing time-frequency conversion on the N sections of signal data; (3) performing gray scale transformation on the N three-dimensional time-frequency graphs; (4) marking the N two-dimensional time-frequency graphs; 2) training a convolutional neural network: (1) setting theconvolutional neural network; (2) training the set convolutional neural network; (3) adjusting parameters of the convolutional neural network; (4) generating a trained neural network; 3) forming a setby the received unknown signals; and 4) identifying a signal modulation mode, wherein the convolutional neural network is formed by training according to the set formed by the known signals, and theset formed by the unknown signals is input into the convolutional neural network for recognition of the modulation mode to obtain the modulation mode of the signals.
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Description

technical field

[0001] The invention relates to a signal processing method in the field of communication, more precisely, the invention relates to a communication signal modulation method identification method. Background technique

[0002] With the rapid development of high technology, signal processing is an important task both in military and civilian applications. The identification of the modulation mode of the communication signal is an intermediate step between signal detection and demodulation, the purpose is to identify the modulation mode of the received signal with little prior knowledge, and provide information for signal demodulation and further processing .

[0003] At present, the existing recognition methods can basically be classified into two categories: modulation recognition methods based on likelihood ratio detection and pattern recognition methods based on feature extraction. However, these methods all have some defects when identifying the modulation...

Claims

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