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Signal denoising method and amplifier

An amplifier and signal technology, applied in the field of signal processing, can solve problems such as complicated processing process and complicated mathematical calculation, and achieve the effects of simple and easy operation, improved signal-to-noise ratio, and low manufacturing cost

Inactive Publication Date: 2011-09-21
SOUTHERN MEDICAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The mathematical calculation of wavelet denoising is relatively complicated, and the processing process is complicated

Method used

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  • Signal denoising method and amplifier

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Embodiment Construction

[0033] The invention provides a signal denoising method and a signal denoising amplifier according to the information integration law observed on auditory neurons. Signal denoising amplification processing of the present invention is realized like this:

[0034] The basic noise model is expressed as follows:

[0035] Formula (1): s(n)=f(n)+σe(n)

[0036] The assumed noise model is the noise model when σ=1 in formula (1) and e(n) is Gaussian white noise, which is expressed as follows:

[0037] Formula (2): s(n)=f(n)+e(n)

[0038] Let the period of signal s(n) be 2T, shift s(n) by step length L (L

[0039] The signal denoising method of the present invention is explained below by taking the sine wave signal f(n) as an exam...

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Abstract

The invention discloses a signal denoising method and amplifier. The signal denoising method comprises the following steps of: (1) repeatedly translating a noise-containing signal by taking a step length as a unit, wherein the step length is smaller than a quarter of the period of the signal; and (2) overlapping the repeatedly-translated signal to obtain a new signal. The signal denoising amplifier comprises a delayer unit and a signal summation unit, wherein the delayer unit is used for repeatedly translating the noise-containing signal by taking a step length as a unit, and the step length is smaller than a quarter of the period of the signal; and the signal summation unit is used for overlapping the repeatedly-translated signal to obtain a new signal. By adopting the signal denoising method and amplifier, parameter optimization is not required, time and labor are saved, mathematical calculation is easier and quicker, an effective denoising effect can be realized, and the signal-to-noise ratio of the signal is increased greatly.

Description

technical field [0001] The present invention relates to a signal processing method and device, in particular to a method and device for denoising and amplifying a noise-carrying signal. Background technique [0002] At present, in the field of electronic information technology, most signal denoising methods are based on wavelet transform. Wavelet transform has the characteristics of low entropy, multi-resolution, decorrelation and flexible selection of basis functions. These characteristics make it widely used in the noise reduction of sound signals and image signals. [0003] For example, a signal f(n) becomes s(n) after being polluted by noise, then the basic noise model can be expressed as follows: [0004] Formula (1): s(n)=f(n)+σe(n) [0005] In the above formula: e(n) is noise; σ is noise intensity. In the simplest case, e(n) is Gaussian white noise with σ=1. Wavelet transform is to suppress e(n) to restore f(n), so as to achieve the purpose of removing noise. [...

Claims

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Application Information

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IPC IPC(8): H04L25/02H04L25/03H04L27/00H04B15/00H04B1/10
Inventor 肖中举徐月晋周凌宏郭淑艳王琳婧
Owner SOUTHERN MEDICAL UNIVERSITY