A short wave Morse message automatic identification method based on intelligent image analysis

Abstract

The invention provides a short wave Morse message automatic identification method based on intelligent image analysis. The method comprises the following steps: step 1, locally generating a code wordsample of a training Morse signal according to a code rate of the training Morse signal and a system sampling rate to form a training sample set; Step 2, generating a modified spectrogram of each sample signal in the training sample set; Step 3, taking the corrected spectrogram of each sample signal as the input of a convolutional neural network, and training the convolutional neural network by adopting a transfer learning method; Step 4, performing code word interception on the received target Morse signal to obtain all code word data of the target Morse signal, and generating a correction speech spectrogram of each code word data according to the step 2; And 5, identifying the modified spectrogram of each code word data of the target Morse signal by using the trained convolutional neuralnetwork, and outputting a code word corresponding to the modified spectrogram. According to the invention, the Morse signal message identification effect can be improved.

Description

technical field [0001] The invention relates to the technical field of Morse signal processing in various communication systems, in particular to an automatic identification method for short-wave Morse messages based on intelligent image analysis. Background technique [0002] Although communication technologies such as satellites, optical fibers, and microwaves have developed rapidly and been widely used, traditional short-wave communications are still widely used, especially in military strategic and tactical communications. Short-wave cannot be replaced by other means of communication. Morse code represents information through regular breaks (no level) and continuations (continuous level), that is, using "dot" (short signal), "dash" (long signal) and "interval" ( No signal) to represent letters, numbers and symbols. It has the advantages of simple encoding method, low equipment cost, strong anti-interference ability and long communication distance. Morse newspaper is a ...

AI Technical Summary

Problems solved by technology

The traditional method does not make full use of the signal characteristics, there are problems such as sensitivity to signal parameter estimation errors, low message recognition rate, etc., especially unable to effectively process manual Morse signals and Morse signals under complex short-wave channels

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