Morse message intelligent detection and recognition method based on deep learning
A recognition method and deep learning technology, applied in the field of Morse signal message recognition, can solve the problems of poor recognition effect and large channel influence, and achieve the effect of improving accuracy, reducing labor intensity and avoiding errors.
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Embodiment 1
[0037] Such as figure 1 As shown, a method for intelligent detection and recognition of Morse messages based on deep learning includes the following steps:
[0038] Step S11: Perform time-frequency analysis and clustering calculation of the decision threshold on the received Morse signal, and detect signal energy through the decision threshold, thereby identifying the position of the Morse code word interval;
[0039] Step S12: Using the neural network to identify the Morse signal corresponding to the Morse code word between the two intervals segment by segment.
[0040] Specifically, the step S11 includes:
[0041] Step S111: Shift the frequency of the received Morse signal to zero intermediate frequency, and perform low-pass filtering;
[0042] Step S112: Set the frame length, perform time-frequency analysis and clustering calculation of the judgment threshold for each frame of Morse signal, detect the energy of each frame of Morse signal through the judgment threshold, lo...
Embodiment 2
[0057] In this embodiment, for the Morse wireless signal transmitted in the short wave mode, the quality of the signal to be processed is required to reach a level that can be clearly distinguished by the human ear, and the code rate is between 50 yards / minute and 140 yards / minute. In this embodiment, it is considered that the processing system (such as a communication terminal, radio monitoring equipment) has completed signal reception and sampling (the sampling rate is much higher than the signal code rate), and it is considered that the current received data only contains a single Morse signal.
[0058] Such as figure 2 As shown, another intelligent detection and recognition method for Morse messages based on deep learning includes two major processes of codeword interval recognition (step S21) and codeword content recognition (step S22):
[0059] Step S21: The processing system first filters the frequency of the received signal; performs energy detection (level detection)...
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