Method and device for quickly processing signal base line

A baseline processing and baseline technology, applied in baseband system components and other directions, can solve problems such as excessive computational load, large computational load, and complex hardware implementation logic.

Inactive Publication Date: 2011-08-24
SHENZHEN LANDWIND IND
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Problems solved by technology

Even according to the method disclosed in the Chinese patent application number 200710075884.7 technical document, for processing N data sequence points, if the window length used is k, at least 2*k*N comparisons and (k*N+k*N/ 2) Second addition, for the case of uneven data distribution, more calculations are requ...

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  • Method and device for quickly processing signal base line
  • Method and device for quickly processing signal base line
  • Method and device for quickly processing signal base line

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Embodiment Construction

[0036] Below according to accompanying drawing and embodiment the present invention will be described in further detail:

[0037] As shown in the figure, a fast signal baseline processing method and device are disclosed. This method uses the sampling data to be sequentially increased point by point (such as Figure 4 This important information provides a fast median calculation method; and on this basis, the median filter is realized, and the signal baseline removal operation is realized by subtracting the output result of the median filter from the original data.

[0038] A fast signal baseline processing method consists of:

[0039] Obtain the filter window data sequence corresponding to the current processing point, and use the point at the last position in the window sequence (corresponding to the latest sampling point in the timely system) to compare with the median value corresponding to the previous processing point. According to the point-by-point order of the data u...

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Abstract

The invention discloses a method and device for quickly processing a signal base line. By utilizing the important information that the sample data is increased point by point, a quick median calculation method is provided and a median filter is realized on such basis, wherein the operation of removing the signal base line is realized by subtracting a median filter output result from an original data. The method comprises the following steps: a) selecting a proper filtering window length k, using a current processing point as a reference point, and filling the filtering window with proper data sequence; b) if the current point is a starting point, searching for the data in the filtering window and outputting the median as the signal base line of the current processing point; c) if the current point is not the starting point, calculating the median in the filtering window by using the quick median calculation method and outputting the median as the signal base line of the current processing point; and d) subtracting a signal base line output value of the current processing point from a collected current processing point value and outputting the result as a data removing the signal base line.

Description

technical field [0001] The invention provides a method and device for quickly processing a signal baseline. Background technique [0002] During signal acquisition, due to factors such as zero drift, low-frequency interference, and poor sensor contact, the signal baseline may fluctuate slowly. When measuring the amplitude of a pulse signal, this slow fluctuation will distort the pulse amplitude measurement. For example, in some particle detection systems (especially blood cell analyzers), the distortion of the pulse amplitude measurement will lead to serious deviations of many measurement parameters, and obviously this result is not expected. For example, in a particle detection system (especially a blood cell analyzer), when a particle (or cell) passes through a micropore, it will generate a pulse signal whose amplitude is proportional to the volume, such as figure 1 shown. [0003] In particle detection systems (especially blood cell analyzers), due to the high sampling...

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Application Information

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IPC IPC(8): H04L25/02
Inventor 易晗平刘胡平王斌
Owner SHENZHEN LANDWIND IND
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