An Automatic Recognition Method of Shortwave Morse Messages Based on Intelligent Image Analysis

Abstract

The invention provides an automatic identification method for short-wave Morse messages based on intelligent image analysis. The method comprises: Step 1, according to the code rate and the system sampling rate of the training Morse signal, locally generate codeword samples of the training Morse signal to form a training sample set; Step 2, generating the training sample set The corrected spectrogram of each sample signal; step 3, using the corrected spectrogram of each sample signal as the input of the convolutional neural network, and adopting the transfer learning method to train the convolutional neural network; step 4, for the received target moiré Morse signal to carry out codeword interception to obtain all codeword data of the target Morse signal, and generate the corrected spectrogram of each codeword data according to step 2; The corrected spectrogram of each codeword data of the Morse signal is identified, and the codeword corresponding to the corrected spectrogram is output. The invention can improve the recognition effect of the Morse signal message.

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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