Mixed noise reduction method for underwater acoustic signals
An underwater acoustic signal and noise reduction technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as the direct removal of useful information, achieve good geometric structure regularity, and eliminate noise effects.
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[0031] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.
[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0033] Such as figure 1 As shown, the present invention discloses a hybrid noise reduction method for underwater acoustic signals, comprising the following steps:
[0034] Step 1. EMD decomposes the original noisy underwater acoustic signal into a series of intrinsic mode functions, counts the number of the series of intrinsic mode functions, and sets it as the decomposition number of VMD, performs VMD on the noisy underwater acoustic signal Decomposed into a series of variational modal components u k ;
[0035] Step 2, calculate each variational modal component u decomposed by VMD k and the correlation coefficient ρ of the original noisy underwa...
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