Spectral signal noise reduction method based on smoothing filtering with combination of VS-LMS
A smoothing filter and signal technology, which is applied in the field of spectral signal noise reduction, can solve the problems that the noise is not well suppressed, the characteristics of the spectrogram cannot be well reflected, and the processing of signal details is not ideal, etc.
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[0062] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0063] Specifically, a spectral signal noise reduction method based on smoothing filtering combined with VS-LMS mainly includes:
[0064] Step 1: Use a smoothing filter to filter the signal to reduce the noise content of the signal;
[0065] Step 2: Use the VS-LMS adaptive filter to perform secondary filtering to improve the resolution of the spectral details and clearly reflect the characteristics of the spectrum.
[0066] Step 1 specific steps include:
[0067] Step 11: Perform discretized sampling on the spectral signal data y(t), the spectral signal data y(t) is composed of a deterministic component f(t) and a random component e(t), and f(t) is pure Signal, e(...
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