CN107483053A - Realize the method, apparatus and computer-readable recording medium of high-resolution sampling - Google Patents
Realize the method, apparatus and computer-readable recording medium of high-resolution sampling Download PDFInfo
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- H—ELECTRICITY
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- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/124—Sampling or signal conditioning arrangements specially adapted for A/D converters
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Abstract
The embodiments of the invention provide a kind of method for realizing high-resolution sampling, including：Adc data is obtained, sampled data is generated after being handled according to moving average algorithm the adc data.This method can realize that high-resolution samples in the case where not changing the crude sampling rate of adc data, and follow-up processing links, such as interpolation, display need not be adjusted to corresponding module, are advantageous to the reusability of subsequent module, reduced the design difficulty and complexity of digital oscilloscope.The embodiment of the present invention additionally provides a kind of device and computer-readable recording medium for realizing high-resolution sampling.
Description
Technical field
The present invention relates to signal processing technology field, and in particular to it is a kind of realize high-resolution sampling method, apparatus and
Computer-readable recording medium.
Background technology
Existing most of digital oscilloscope uses high-speed AD converter (ADC, Analog- of the vertical resolution for 8bit
To-Digital Converter), its quantified precision is only the 1/256 of completely amplitude, and this is difficult to meet under some application scenarios
It is required that.There are some middle and high end digital oscilloscopes using the high-speed ADC of higher vertical resolution (such as 12bit), quantization essence can be improved
Degree, by taking 12bit as an example, quantified precision can reach the 1/4096 of full amplitude, but cost can accordingly increase again.
If the ADC compared with low vertical resolution (such as 8bit) can be used, certain numeral letter is carried out by being exported to it
Number processing, obtains equivalent vertical resolution higher (such as 12bit) sampled data, it is possible to full while cost is not increased
Foot is necessarily using the demand to the higher vertical resolution of oscillograph.
This method has implementation in existing part number oscillograph, and it realizes schematic diagram as shown in figure 1, main former
Manage and be：Every N points of ADC samplings are averaging processing, obtain the point of high-resolution sampling.
Specifically, to N point ordered series of numbers { a1,a2,a3,...aNBe averaging processing, its formula is expressed as follows：
Wherein, aavgFor the result of average treatment.
That is, the 1st point of ADC samplings is averaging processing to n-th point, obtains the 1st point of high-resolution sampling,
The N+1 o'clock to the 2N point of ADC samplings is averaging processing, obtains the 2nd point of high-resolution sampling.
Result after being averaged to ADC sampled datas can reach higher vertical precision, and the 2 of such as 1/256 and 2/256
Times average value is 1.5/256=3/512, i.e., the data of 8bit vertical resolutions obtain 9bit calculating knot after 2 times average
Fruit.
On the other hand, from the point of view of the definition of the number of significant digit (ENOB) of adc data,
Wherein SNR is signal to noise ratio, and unit is dB (decibel)
This averaging method has inhibitory action to the random noise being superimposed in signal, therefore, can improve signal to noise ratio (SNR).
The every 4 times SNR that can averagely improve 6dB in theory, the corresponding ENOB for increasing 1bit.
But method described above also has following defect：
1st, 1 sampled point is averagely obtained per N number of point, this causes equivalent sampling rate to be reduced to original ADC sample rates
1/N。
2nd, based on the 1st reason, the equivalent sampling rate and original ADC sample rates after being averaged are inconsistent, follow-up after sampling
A series of processing links such as interpolation, display be required for carry out parameter and set on adjustment, this is unfavorable for subsequent module
Reusability, add the design difficulty and complexity of digital oscilloscope.
For interpolation module, it is assumed that the HORIZONTAL PLAID number of an oscillograph is 10 lattice, and the display pixel of horizontal waveform is
1000 points, then under the horizontal gear of 1ns/ lattice, when sample rate is 1GSa/s, the original point on screen is for 10 points, it is necessary to right
100 times of interpolations processing of original point progress could obtain normal wavy line and show.If now carry out at 4 points to original point averagely to locate
Reason, the then equivalent sampling rate after handling are changed into 250MSa/s from 1GSa/s, and now, the original point on screen will be changed into 2.5, then need
Normal wavy line could be obtained to 400 times of interpolations processing of original point progress to show.It can be seen that the interpolation multiple of interpolation module exists
Average treatment is front and rear to be changed, and which increase the difficulty of oscilloscope design and complexity.
The content of the invention
In order to solve problems of the prior art at least in part, the embodiment of the present invention it is expected to provide a kind of realization height
The method, apparatus and computer-readable recording medium of resolution ratio sampling.
The embodiments of the invention provide a kind of method for realizing high-resolution sampling, methods described includes：
Obtain adc data；
Sampled data is generated after being handled according to moving average algorithm the adc data.
It is described that adc data is handled according to moving average algorithm in such scheme, including：
The processing of N points moving average is carried out to the L items sequence for forming the adc data, obtains multiple N points sliding averages,
The sampled data is the sequence to be made up of the multiple N points sliding average, wherein, N is positive integer.
In such scheme, the multiple N points sliding average determines in the following manner：
The Section 1 of the multiple N points sliding average be the L items sequence Section 1 to N items and divided by N
Value；
The Section 2 of the multiple N points sliding average be the L items sequence Section 2 to N+1 items and divided by N
Value；
By that analogy, the multiple N points sliding average last be (L-N+1) item of the L items sequence extremely
L items and divided by N value.
In such scheme, after the generation sampled data, methods described also includes：
Output to display screen is shown after Digital Signal Processing is carried out to the sampled data.
The embodiments of the invention provide it is a kind of realize high-resolution sampling device, described device, including：Acquisition module and
Moving average processing module；Wherein,
The acquisition module, for obtaining adc data；
The processing module, for generating sampled data after being handled according to moving average algorithm the adc data.
In such scheme, the moving average processing module, for handling in the following manner adc data：
The processing of N points moving average is carried out to the L items sequence for forming the adc data, obtains multiple N points sliding averages,
The sampled data is the sequence to be made up of the multiple N points sliding average, wherein, N is positive integer.
In such scheme, the multiple N points sliding average determines in the following manner：
The Section 1 of the multiple N points sliding average be the L items sequence Section 1 to N items and divided by N
Value；
The Section 2 of the multiple N points sliding average be the L items sequence Section 2 to N+1 items and divided by N
Value；
By that analogy, the multiple N points sliding average last be (L-N+1) item of the L items sequence extremely
L items and divided by N value.
In such scheme, described device also includes：Digital signal processing module and output module；Wherein,
The digital signal processing module, for carrying out Digital Signal Processing to the sampled data；
The output module, for the data output after Digital Signal Processing to display screen to be shown.
The embodiments of the invention provide a kind of computer-readable recording medium, including program, described program can be processed
Device is performed to realize the method for realizing high-resolution sampling as described above.
Compared with prior art, the embodiment of the present invention at least possesses advantages below：
The method for realizing high-resolution sampling provided according to embodiments of the present invention, according to moving average algorithm to described
Adc data generates sampled data after being handled, and can realize high score in the case where not changing the crude sampling rate of adc data
Resolution is sampled, and follow-up processing links, such as interpolation, display need not be adjusted to corresponding module again, is advantageous to follow-up
The reusability of module, reduce the design difficulty and complexity of digital oscilloscope.
Brief description of the drawings
Fig. 1 is the realization principle figure of prior art middle high-resolution sampling；
Fig. 2 is that the present invention realizes the process chart of the method for high-resolution sampling in one embodiment；
Fig. 3 is the schematic diagram calculation of moving average processing method of the present invention；
Fig. 4 is the realization principle figure for the method that the present invention realizes high-resolution sampling；
Fig. 5 is that the present invention realizes process chart of the method for high-resolution sampling in second of embodiment；
Fig. 6 is that the present invention realizes the basic block diagram of the device of high-resolution sampling in one embodiment；
Fig. 7 is that the present invention realizes process chart of the device of high-resolution sampling in second of embodiment.
Embodiment
The present invention is described in further detail below by embodiment combination accompanying drawing.
Embodiment one
Reference picture 2, the embodiment of the present invention one provide a kind of method for realizing high-resolution sampling, and methods described includes：
Step 201, obtain adc data；
Obtained data are sampled specifically, the adc data is ADC.
Step 202, generate sampled data after being handled according to moving average algorithm the adc data.
The step in, it is described that adc data is handled according to moving average algorithm, including：
The processing of N points moving average is carried out to the L items sequence for forming the adc data, obtains multiple N points sliding averages,
The sampled data is the sequence to be made up of the multiple N points sliding average.
Wherein, N can be arranged to any positive integer according to being actually needed.
Preferably, N can be arranged to 2 positive integer power；Typically, it is vertical can to improve 1bit for every 2 times of moving averages
Precision, every 4 times of moving averages can improve 1bit ENOB, therefore N can be taken as to 2 positive integer power；N value can be with
The target that improves as needed is set, such as：Need to improve ENOB 2bit, then N takes 4*4=16 times.N values are bigger, then slide
Dynamic average time is more, the random noise in signal is improved more obvious.
Specifically, the multiple N points sliding average determines in the following manner：
The Section 1 of the multiple N points sliding average be the L items sequence Section 1 to N items and divided by N
Value；
The Section 2 of the multiple N points sliding average be the L items sequence Section 2 to N+1 items and divided by N
Value；
By that analogy, the multiple N points sliding average last be (L-N+1) item of the L items sequence extremely
L items and divided by N value.
Specifically, L and N are positive integer.
Moving average processing method is described in detail below.
The moving average that N points are carried out to a L items sequence is handled, then can obtain the sliding average of multiple N points, these N
The sliding average of point is the average value of the multiple continuous N item sequences calculated from the L items sequence.Its Computing Principle is as schemed
Shown in 3, wherein, the 1st of the multiple N points sliding average is the 1st of the L items sequence to N items sum divided by N knot
Fruit B1；The 2nd of the multiple N points sliding average is the 2nd of the L items sequence to N+1 items sum divided by N result
B2；... by that analogy, obtain the sequence B of multiple N points sliding average compositions.
According to Fig. 3, the result of calculation of multiple sliding averages is as follows in sequence B：
From figure 3, it can be seen that time interval and former sequence between each element of the sequence B of multiple N points sliding average compositions
It is consistent to arrange A, therefore, the front and rear data sampling rate for original L item sequences of moving average does not have any change.
What the embodiment of the present invention was provided realizes that the realization principle figure of the method for high-resolution sampling is as shown in Figure 4.Use
The method of moving average is handled adc data, on the premise of average fold N is equal, the high-resolution hits of acquisition
Result is obtained according to prior art, possesses identical effect in vertical resolution and ENOB improvement degree.
In such scheme, reference picture 5, it is described generation sampled data after, methods described also includes：
Step 203, output to display screen after sampled data progress Digital Signal Processing is shown.
To sum up, the method for realizing high-resolution sampling provided according to embodiments of the present invention, according to moving average algorithm pair
The adc data generates sampled data after being handled.Based on this method, the crude sampling rate of adc data can not changed
In the case of realize high-resolution sample, and follow-up processing links, such as interpolation, display need not again to corresponding module carry out
Adjustment, be advantageous to the reusability of subsequent module, reduce the design difficulty and complexity of digital oscilloscope.
Embodiment two
Reference picture 6, shows a kind of structured flowchart for the device for realizing high-resolution sampling of the present invention, and the device includes：
Acquisition module 61 and moving average processing module 62；Wherein,
The acquisition module 61, for obtaining adc data；
The processing module 62, for generating hits after being handled according to moving average algorithm the adc data
According to.
In such scheme, the moving average processing module 62, for handling in the following manner adc data：
The processing of N points moving average is carried out to the L items sequence for forming the adc data, obtains multiple N points sliding averages,
The sampled data is the sequence to be made up of the multiple N points sliding average, wherein, N is positive integer.Preferably, can be with
N is arranged to 2 positive integer power.
In such scheme, the multiple N points sliding average determines in the following manner：
The Section 1 of the multiple N points sliding average be the L items sequence Section 1 to N items and divided by N
Value；
The Section 2 of the multiple N points sliding average be the L items sequence Section 2 to N+1 items and divided by N
Value；
By that analogy, the multiple N points sliding average last be (L-N+1) item of the L items sequence extremely
L items and divided by N value.
In a kind of optional embodiment of the present invention, reference picture 7, described device also includes：Digital signal processing module
63 and output module 64；Wherein,
The digital signal processing module 63, for carrying out Digital Signal Processing to the sampled data；
The output module 64, for the data output after Digital Signal Processing to display screen to be shown.
In specific implementation process, above-mentioned acquisition module 61, moving average processing module 62, digital signal processing module 63
Can be by the central processing unit (CPU, Central Processing Unit) in digital oscilloscope, micro- with output module 64
Processor (MPU, Micro Processing Unit), digital signal processor (DSP, Digital Signal
Processor) or programmable logic array (FPGA, Field-Programmable GateArray) is realized.
Embodiment three
The embodiment of the present invention three provides a kind of computer-readable recording medium, including program, and described program can be located
Reason device is performed to realize the method for realizing high-resolution sampling as described in above-mentioned embodiment one.
Each embodiment in this specification is described by the way of progressive, what each embodiment stressed be with
The difference of other embodiment, between each embodiment identical similar part mutually referring to.
It should be understood by those skilled in the art that, the embodiment of the embodiment of the present invention can be provided as method, apparatus or calculate
Machine program product.Therefore, the embodiment of the present invention can use complete hardware embodiment, complete software embodiment or combine software and
The form of the embodiment of hardware aspect.Moreover, the embodiment of the present invention can use one or more wherein include computer can
With in the computer-usable storage medium (including but is not limited to magnetic disk storage, CD-ROM, optical memory etc.) of program code
The form of the computer program product of implementation.
The embodiment of the present invention is with reference to method according to embodiments of the present invention, terminal device (system) and computer program
The flow chart and/or block diagram of product describes.It should be understood that can be by computer program instructions implementation process figure and/or block diagram
In each flow and/or square frame and the flow in flow chart and/or block diagram and/or the combination of square frame.These can be provided
Computer program instructions are set to all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing terminals
Standby processor is to produce a machine so that is held by the processor of computer or other programmable data processing terminal equipments
Capable instruction is produced for realizing in one flow of flow chart or multiple flows and/or one square frame of block diagram or multiple square frames
The device for the function of specifying.
These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing terminal equipments
In the computer-readable memory to work in a specific way so that the instruction being stored in the computer-readable memory produces bag
The manufacture of command device is included, the command device is realized in one flow of flow chart or multiple flows and/or one side of block diagram
The function of being specified in frame or multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing terminal equipments so that
Series of operation steps is performed on computer or other programmable terminal equipments to produce computer implemented processing, so that
The instruction performed on computer or other programmable terminal equipments is provided for realizing in one flow of flow chart or multiple flows
And/or specified in one square frame of block diagram or multiple square frames function the step of.
Although having been described for the preferred embodiment of the embodiment of the present invention, those skilled in the art once know base
This creative concept, then other change and modification can be made to these embodiments.So appended claims are intended to be construed to
Including preferred embodiment and fall into having altered and changing for range of embodiment of the invention.
Finally, it is to be noted that, herein, such as first and second or the like relational terms be used merely to by
One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between any this actual relation or order be present.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering including for nonexcludability, so that process, method, article or terminal device including a series of elements are not only wrapped
Those key elements, but also the other element including being not expressly set out are included, or is also included for this process, method, article
Or the key element that terminal device is intrinsic.In the absence of more restrictions, wanted by what sentence "including a ..." limited
Element, it is not excluded that other identical element in the process including the key element, method, article or terminal device also be present.
Above to a kind of method and apparatus for realizing high-resolution sampling provided by the present invention, it is described in detail,
Specific case used herein is set forth to the principle and embodiment of the present invention, and the explanation of above example is simply used
Understand the method and its core concept of the present invention in help；Meanwhile for those of ordinary skill in the art, according to the present invention's
Thought, there will be changes in specific embodiments and applications, in summary, this specification content should not be construed as
Limitation of the present invention.
Claims (9)
- A kind of 1. method for realizing high-resolution sampling, it is characterised in that methods described includes：Obtain adc data；Sampled data is generated after being handled according to moving average algorithm the adc data.
- 2. according to the method for claim 1, it is characterised in that it is described according to moving average algorithm to adc data at Reason, including：The processing of N points moving average is carried out to the L items sequence for forming the adc data, obtains multiple N points sliding averages, it is described Sampled data is the sequence to be made up of the multiple N points sliding average, wherein, N is positive integer.
- 3. according to the method for claim 2, it is characterised in that the multiple N points sliding average is true in the following manner It is fixed：The Section 1 of the multiple N points sliding average be the L items sequence Section 1 to N items and divided by N value；The Section 2 of the multiple N points sliding average be the L items sequence Section 2 to N+1 items and divided by N value；By that analogy, the multiple N points sliding average last be the L items sequence (L-N+1) Xiang Zhi L items And divided by N value.
- 4. according to the method described in claims 1 to 3 any of which item, it is characterised in that after the generation sampled data, institute Stating method also includes：Output to display screen is shown after Digital Signal Processing is carried out to the sampled data.
- A kind of 5. device for realizing high-resolution sampling, it is characterised in that described device, including：Acquisition module and moving average Processing module；Wherein,The acquisition module, for obtaining adc data；The processing module, for generating sampled data after being handled according to moving average algorithm the adc data.
- 6. device according to claim 5, it is characterised in that the moving average processing module, for by with lower section Formula is handled adc data：The processing of N points moving average is carried out to the L items sequence for forming the adc data, obtains multiple N points sliding averages, it is described Sampled data is the sequence to be made up of the multiple N points sliding average, wherein, N is positive integer.
- 7. device according to claim 6, it is characterised in that the multiple N points sliding average is true in the following manner It is fixed：The Section 1 of the multiple N points sliding average be the L items sequence Section 1 to N items and divided by N value；The Section 2 of the multiple N points sliding average be the L items sequence Section 2 to N+1 items and divided by N value；By that analogy, the multiple N points sliding average last be the L items sequence (L-N+1) Xiang Zhi L items And divided by N value.
- 8. according to the device described in claim 5 to 7 any of which item, it is characterised in that described device also includes：Data signal Processing module and output module；Wherein,The digital signal processing module, for carrying out Digital Signal Processing to the sampled data；The output module, for the data output after Digital Signal Processing to display screen to be shown.
- 9. a kind of computer-readable recording medium, it is characterised in that including program, described program can be executed by processor with reality The now method as any one of Claims 1-4.
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