An Automatic Recognition Method of Morse Code Based on Two-stage Threshold Judgment
Aiming at the problem of errors in automatic recognition of morse codes, a method for automatic recognition of morse codes based on a combination of two-level threshold judgment is proposed. Firstly, a large amount of background noise in morse code is filtered out through a bandpass filter. Secondly, preliminary segmentation of morse code is achieved through amplitude based first level threshold judgment, and invalid morse code is eliminated through duration based second level threshold judgment. Thirdly, by performing concatenated code detection on the signal, further error correction can be achieved to improve recognition accuracy. Finally, the recognition result is obtained by comparing the strings. The experimental results show that the proposed method has high recognition accuracy and certain engineering application value.
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