CN104065489B - Signal level determination device and method - Google Patents
Signal level determination device and method Download PDFInfo
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- CN104065489B CN104065489B CN201310090754.6A CN201310090754A CN104065489B CN 104065489 B CN104065489 B CN 104065489B CN 201310090754 A CN201310090754 A CN 201310090754A CN 104065489 B CN104065489 B CN 104065489B
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Abstract
A kind of signal level determination device of present disclosure and method, signal level determination device is used for determining the level of a source signal, the source signal on a time shaft sequentially comprising multiple source-informations, one of each source-information correspondence multiple normal level, each normal level is equivalent at least one of multiple extension level, and the signal level determination device is included：One storage circuit, for storing the level information of the normal level and its equivalent extension level associated by part or all of the plurality of source-information；One turnover parameter calculation circuit, for calculating multiple turnover parameters of the normal level and its equivalent extension level associated by each source-information according to the level information；And a decision-making circuit, for determining the level of each source-information according to the plurality of turnover parameter of part or all of the plurality of source-information.
Description
Technical field
The present invention relates to a kind of signal level determine (it is determined that) device and method, especially one kind can reduce signal level turn
The signal level determination device and method of folding.
Background technology
Because electronic product can produce electromagnetic radiation when operating, therefore may interfere with the normal operation even shadow of other devices
Health is rung, therefore majority state makes specification for the electromagnetic radiation of electronic product, to prevent electromagnetic interference
(Electromagnetic Interference, EMI) brings harm.In some fields, the specification for electromagnetic interference is outstanding
Its is strict, for example, for an automobile-used network communication device, and the frequency spectrum of the signal transmitted by it should concentrate on low frequency,
To meet the automobile-used electromagnetic interference specification of correlation, current technology is that above-mentioned automobile-used network service is filtered using a low pass filter
The device signal to be sent, the frequency spectrum of sending signal is limited in low frequency interval, and then meet related specifications.So
And, for the automobile-used network communication device, the spectrum concentration of sending signal also implies that signal transmission distance and biography in low frequency
How the reduction of throughput rate (Throughput), in view of this, avoid signal transmission in the case of electromagnetic interference specification is met
Loss turns into the art personage problem to be solved.
The content of the invention
In view of above-mentioned, a purpose of the invention is to provide a kind of signal level determination device and method, existing to solve
The problem of technology.
Another object of the present invention is to provide a kind of signal level determination device and method, to reduce turning for signal level
Folding, and generation high frequency signal components can be reduced, and then meet an electromagnetic interference specification.
The present invention discloses a kind of signal level determination device, for determining the level of a source signal, the source signal
In one of multiple source-informations, each source-information correspondence multiple normal levels are sequentially included on a time shaft, often
The individual normal level is equivalent at least one of multiple extension level, an embodiment bag of the signal level determination device
Contain：One storage circuit, for storing the normal level associated by part or all of the plurality of source-information and its equivalent prolonging
Stretch the level information of level；One turnover parameter calculation circuit, is closed for calculating each source-information according to the level information
The normal level of connection and its multiple turnover parameters of equivalent extension level；And a decision-making circuit, for according to a part or
All the plurality of turnover parameter of the plurality of source-information determines the level of each source-information.
According to one embodiment of the invention, foregoing decision-making circuit is according in the plurality of turnover parameter of each source-information
The normal level associated by reckling extends level and determines the level of each source-information.
The present invention separately discloses a kind of signal level determining method, for determining the level of a source signal, source letter
Number in a time series sequentially comprising multiple source-informations, each source-information correspondence multiple normal levels wherein it
One, each normal level is equivalent at least one of multiple extension level, an implementation of the signal level determining method
Example is realized by a signal level determination device, and is comprised the steps of：Storage one or whole the plurality of source-informations are closed
The normal level of connection and its level information of equivalent extension level；Each source-information is calculated according to the level information to be closed
The normal level of connection and its multiple turnover parameters of equivalent extension level；And foundation one or whole the plurality of source-informations
The plurality of turnover parameter determine the level of each source-information.
The step of foundation one embodiment of the invention, level of foregoing each source-information of decision, includes：According to each
This comes to determine each for the normal level or extension level in the plurality of turnover parameter of the source-information associated by reckling
The level of source information.
Feature for the present invention, implementation and effect, now coordinate schema to make preferred embodiment detailed description as follows.
Brief description of the drawings
Fig. 1 is the schematic diagram of an embodiment of signal level determination device of the invention.
Fig. 2 is the calculation process of the turnover parameter calculation circuit of Fig. 1 and the schematic diagram of the decision process of decision-making circuit.
Fig. 3 is the calculation process of the turnover parameter calculation circuit of Fig. 1 and another schematic diagram of the decision process of decision-making circuit.
Fig. 4 a calculate schematic diagram for the turnover parameter of the 4th source-information of Fig. 3.
Fig. 4 b calculate schematic diagram for the turnover parameter of the 4th source-information of Fig. 3.
Fig. 4 c calculate schematic diagram for the turnover parameter of the 4th source-information of Fig. 3.
Fig. 5 a calculate schematic diagram for the turnover parameter of the 5th source-information of Fig. 3.
Fig. 5 b calculate schematic diagram for the turnover parameter of the 5th source-information of Fig. 3.
Fig. 5 c calculate schematic diagram for the turnover parameter of the 5th source-information of Fig. 3.
Fig. 6 is the schematic diagram of an embodiment of signal level determining method of the invention.
【Main element symbol description】
100 signal level determination devices
110 storage circuits
120 turnover parameter calculation circuits
130 decision-making circuits
The level information of the level associated by S610 storages one or whole source-informations
S620 calculates the turnover parameter of the level associated by each source-information according to the level information
The turnover parameter of S630 foundations one or whole source-informations determines the level of each source-information
Specific embodiment
Disclosure content of the invention includes a kind of signal level determination device and method, and the device and method can reduce signal
The turnover of level, and the generation of high-frequency signal can be reduced, and then meet an a predetermined specifications (such as electromagnetic interference
(Electromagnetic Interference, EMI) specification).Be embodied as it is possible under the premise of, the art it is common
Technical staff can realize the present invention according to the equivalent element of disclosure content of the invention selection or step, namely of the invention
Implementation is not limited to presently disclosed embodiment.Further, since what signal level determination device of the invention was included
Part or all of element it is any individually for can be known element, therefore, in the abundant disclosure for not influenceing the device to invent
And on the premise of exploitativeness, below illustrate for realizing that the details of the Individual elements that the device is invented will give memorandum.Furthermore,
Signal level determining method of the invention can be realized by device of the invention, it is also possible to be realized by other devices, because
This do not influence the method invent abundant disclosure and exploitativeness on the premise of, following methods invention the explanation side of will focus on
Method in itself rather than hardware unit details.
Fig. 1 is referred to, it is the schematic diagram of an embodiment of signal level determination device of the invention, the signal level is determined
Determine device 100 and can be applied to a communicator (such as meets the Ethernet communicator of 100Base-T specifications), for certainly
The level of a fixed source signal, the source signal on a time shaft sequentially comprising multiple source-informations, each source-information pair
One of multiple normal levels are answered, and each normal level is equivalent at least one of multiple extension level.Citing
For, the source signal be a pulse-amplitude modulation (Pulse Amplitude Modulation, PAM) signal, it is the plurality of just
The number of normal level is 2M+1 (wherein M is positive integer), comprising-M,-M+1 ..., -1, and the level such as 0,1 ..., M-1, M, and be somebody's turn to do
Multiple extends the numbers of level for 2 × (2M+1) is individual, comprising-M- (2M+1), (- M+1)-(2M+1) ... ,-M-2 ,-M-1, M+1,
The level such as M+2 ..., (M-1)+(2M+1), M+ (2M+1), wherein the information equivalence representated by n-th normal level is in n-th-(2M
+ 1) information and representated by the individual extension level of n-th+(2M+1), n is the integer between-M and M, can be-M or M.
From the above, the signal level determination device 100 of the present embodiment is included：One storage circuit 110, it is foregoing for storing
The level information of normal level and its equivalent extension level associated by part or all of multiple source-informations, citing comes
Say, refer to table 1 below, if multiple source-informations include a kth source-information, the source-information of a kth+1 and a kth+2 source letter
Breath, and kth source-information associates a kth normal level and one or more kth extend level, the source-information of kth+1 and associate a kth
+ 1 normal level and one or more kth+1 extend level and the source-information of kth+2 association normal level of one kth+2 and one or
Multiple kth+2 extend level, and storage circuit 110 stores the normal level associated by kth, kth+1 and the source-information of kth+2 and prolongs
Stretch the information of level；One turnover parameter calculation circuit 120, for being calculated associated by each source-information according to above-mentioned level information
Normal level and its equivalent extension level multiple turnover parameters, wherein one or more turnover parameters of each level correspondence,
For example, turnover parameter calculation circuit 120 is counted respectively according to the level information of foregoing kth, kth+1 and the source-information of kth+2
Calculate kth+2 normally and extend multiple kth+2 turnover parameter of level；And a decision-making circuit 130, for according to a part or complete
Multiple turnover parameters of portion's source-information determine the level of each source-information, and in the present embodiment, decision-making circuit 130 is according to each
Normal associated by minimum one or more and/or extend level and determine each source letter in multiple turnover parameters of source-information
The level of breath, for example, determine the source-information of kth+2 according to the level associated by minimum one in the plurality of kth+2 turnover parameter
Level, or determine kth or kth+1 according to the level associated by minimum three in the plurality of kth+2 turnover parameter and originate
The level of information.Foregoing k is positive integer, and kth, kth+1 and the source-information of kth+2 are continuous three sources letter on time shaft
Breath.
Table 1
Note that and use known storage element because those skilled in the art under this invention can disclose
(such as buffer or first in first out device), logic circuit (such as adder, subtracter and/or programmable logic device) and compare
Any or any combination of circuit is to realize foregoing storage circuit 110, transfer parameter calculation circuit 120 and decision-making circuit 130, because
On the premise of abundant disclosure of the invention and exploitativeness is not influenceed, the explanation of redundancy will be omitted for this.
The decision of the algorithm and decision-making circuit 130 of the turnover parameter calculation circuit 120 of Fig. 1 described further below
Journey.Refer to Fig. 2 and table 2 below, it is assumed that source signal includes first, second and third source-information, each source-information is closed
Connection five normal levels (- 2, -1,0,1,2) in one, each normal level be equivalent to ten extend level (- 7, -6, -5, -
4, -3,3,4,5,6,7) in two (namely n-th normal level be equivalent to n-th -5 and the n-th+5 extension level), wherein the
The level of one source-information had been determined as normal level -2 (its accumulation turnover parameter is 0), the level industry of second source information already
It is determined that for normal level 2 (its accumulation turnover parameter is 0), and the 3rd source-information associate to normal level 2 and its equivalent prolong
Stretch level 7 and -3 but be not yet decided to be whichever.Because the level differences of first and second source-information are [2- (- 2)]=4,
If therefore second with the 3rd source-information level differences also be 4 when (namely the level of the 3rd source-information be a preselected level 6
When), this two level differences, without turnover, therefore will not cause signal spectrum toward high-frequency mobile by identical, however, as it was previously stated,
3rd source-information is associated to normal level 2 and its equivalent extension level 7 and -3 rather than the preselected level 6, therefore decision-making circuit 130
Level of one of the level 2,7 and -3 as the 3rd source-information only may be selected.It is assumed that the level of the 3rd source-information is for just
Normal level 2, it is | 2-6 |=4 with the level differences between preselected level 6, and now the level differences 4 are considered as the normal level
2 the 3rd turnover parameter (now the accumulation turnover parameter of the normal level 2 is also 4)；If assuming the level of the 3rd source-information
It is equivalent extension level 7, it is | 7-6 |=1 with the level differences between preselected level 6, and now the level differences 1 are considered as this
Equivalent the 3rd turnover parameter for extending level 7 (now the accumulation turnover parameter of the extension level 7 is also 1)；If assuming the 3rd
The level of source information is equivalent extension level -3, and it is | -3-6 |=9 with the level differences between preselected level 6, now the electricity
Adjustment different 9 be considered as this it is equivalent extend level -3 the 3rd turnover parameter (now the extension level -3 accumulation turnover parameter
For 9), because reckling is 1 in the turnover parameter of above three the 3rd, namely turnover parameter calculation circuit 120 believes the 3rd source
The level of breath is assumed to that minimum 3rd turnover parameter 1 can be calculated when extending level 7, therefore decision-making circuit 130 can be by the 3rd source
The level of information is set as 7, most effectively to avoid producing the radio-frequency component in signal.Because accumulation turnover parameter is smaller, table
Show that the change of signal is shallower, its radio-frequency component is also less.In note that the present embodiment, when decision-making circuit 130 determines the 3rd
When the level of source information is 7, the first source-information just can be processed by a subsequent conditioning circuit, for example, entered by an analogy front-end circuit
Row transmission is processed, but it is determined that on the premise of circuit energy normal operation at different levels, the subsequent conditioning circuit also can advanced processing this first
Source-information.
Table 2
From the above, although decision-making circuit 130 can determine the 3rd source-information according to reckling in these the 3rd turnover parameters
Level be 7, if but the normal level of follow-up source-information to extend level with it excessive with the difference of level 7, will be unable to
The generation of high frequency signal components is effectively reduced, therefore, the present invention can be with further reference to the level information of follow-up source-information, then
The level of the 3rd source-information is determined again, thereby compensates the deficiency of the example shown in Fig. 2.Refer to Fig. 3, with Fig. 2 identicals
On the basis of, Fig. 3 further includes the 4th and the 5th source-information, wherein the 4th source-information is associated to normal level -2 and its waited
Effect extends level 3 and -7, and the 5th source-information is associated to normal level 1 and its equivalent extension level 6 and -4.Due in Fig. 3
The level of three source-informations refers to the level information of follow-up source-information (comprising the 4th source-information) to determine, therefore certainly
Before fixed, the level of the 3rd source-information still has 7,2 and -3 three kinds of options of level, and the turnover parameter of correlation (is transferred comprising the 3rd
Parameter 1,4 and 9) and level information (comprising the second to the 4th source-information level information) can be temporarily stored into storage circuit 110
For turnover parameter calculation circuit 120 and/or decision-making circuit 130 use (in other words, it is not necessary to parameter and information can not
Storage).How turnover parameter calculation circuit 120 discussed individually below calculates the 4th turn associated by the level of the 4th source-information
How folding parameter, and decision-making circuit 130 determines the level of the 3rd source-information or limit level to select according to the 4th turnover parameter
：
The level of (1) the 4th source-information is assumed to normal level -2：
Refer to Fig. 3, Fig. 4 a and table 3 below, due to second source information level it is determined that be 2, the 3rd source-information
Level may be 2,7 or -3 and correspond to the 3rd turnover parameter 4,1 and 9 (herein equal to accumulation turnover parameter) respectively, therefore transfer
Parameter calculation circuit 120 can copy the explanation of Fig. 2 to obtain three preselected levels 2,12 and -8 of the 4th source-information, and (it was calculated
Journey can be represented with following formula：(2-2)+2=2；(7-2)+7=12；(- 3-2)+(- 3)=- 8).Therefore, when it is assumed that the 4th
The level of source information is normal level -2, and turnover parameter calculation circuit 120 can calculate the normal level -2 with foregoing pre-selection electricity
To obtain multiple 4th turnover parameters 4,14 and 6, (its calculating process can be represented flat 2,12, -8 level differences with following formula：
| -2-2 |=4；| -2-12 |=14；| -2- (- 8) |=6), then again by each the 4th turnover parameter respectively plus corresponding
Multiple accumulations that 3rd turnover parameter can be obtained corresponding to the normal level -2 are transferred, and (its calculating process can for parameters 8,15,15
Represented with following formula：4+4=8；14+1=15；6+9=15), reckling is 8 in this three accumulation turnover parameters, it is meant that
When the 4th and the 3rd turnover parameter is 4, accumulation turnover parameter is minimum, in other words, when decision-making circuit 130 is by the 4th
The level of source information is set to -2 and minimum accumulation turnover parameter 8 is can obtain when the level of the 3rd source-information is set into 2.
The level of (II) the 4th source-information is assumed to extend level 3：
Fig. 3, Fig. 4 b and table 3 below are referred to, it is similar foregoing, because the level of second source information is it is determined that be the 2, the 3rd
The level of source information may for 2,7 or -3 and respectively correspond to the 3rd turnover parameter 4,1 and 9, therefore turnover parameter calculation circuit 120
The explanation of Fig. 2 can be copied to obtain three preselected levels 2,12 and -8 of the 4th source-information.Therefore, when it is assumed that the 4th source-information
Level for extend level 3, turnover parameter calculation circuit 120 can calculate the extension level 3 and foregoing preselected level 2,12, -8
Level differences transfer that (its calculating process can be represented parameters 1,9 and 11 with following formula to obtain multiple four：| 3-2 |=1；|
3-12 |=9；| 3- (- 8) |=11), be then plus the 3rd corresponding turnover parameter respectively by each the 4th turnover parameter again
(its calculating process can be represented the multiple accumulation turnover parameters 5,10,20 that can obtain corresponding to the extension level 3 with following formula：1
+ 4=5；9+1=10；11+9=20), reckling is 5 in this three accumulation turnover parameters, it is meant that when the 4th turnover parameter is 1
Accumulation turnover parameter is minimum when with the 3rd turnover parameter being 4, in other words, when decision-making circuit 130 is by the 4th source-information
Level is set to 3 and minimum accumulation turnover parameter 5 is can obtain when the level of the 3rd source-information is set into 2.
(III) level of the 4th source-information is assumed to extend level -7：
Fig. 3, Fig. 4 c and table 3 below are referred to, it is similar foregoing, because the level of second source information is it is determined that be the 2, the 3rd
The level of source information may for 2,7 or -3 and respectively correspond to the 3rd turnover parameter 4,1 and 9, therefore turnover parameter calculation circuit 120
The explanation of Fig. 2 can be copied to obtain three preselected levels 2,12 and -8 of the 4th source-information.Therefore, when it is assumed that the 4th source-information
Level to extend level -7, turnover parameter calculation circuit 120 can calculate the extension level -7 and foregoing preselected level 2,
12nd, to calculate multiple 4th turnover parameters 9,19 and 1, (its calculating process can be represented -8 level differences with following formula：|-7-2
|=9；| -7-12 |=19；| -7- (- 8) |=1), each the 4th turnover parameter is then added corresponding the 3rd turn respectively again
Multiple accumulations that folding parameter can be obtained corresponding to the extension level -7 are transferred, and (its calculating process can be with following for parameters 13,20,10
Formula is represented：9+4=13；19+1=20；1+9=10), reckling is 10 in this three accumulation turnover parameters, it is meant that when the
Four turnover parameters are that 1 accumulation turnover parameter when being 9 with the 3rd turnover parameter is minimum, in other words, when decision-making circuit 130 is by the
The level of four source-informations is set to -7 and minimum accumulation turnover parameter 10 is can obtain when the level of the 3rd source-information is set into -3.
Table 3
In above-mentioned (I) to (III) three options, (II) individual option can obtain minimum accumulation turnover 5, represent when decision
When the level of the 3rd source-information is determined as 2 and the level of the 4th source-information is determined as into 3 by circuit 130, the level of accumulation
The turnover of difference is minimum, and can most effectively reduce the radio-frequency component for producing signal.In comparison, if decision-making circuit 130 is according to Fig. 2
Explanation when the level of the 3rd source-information is determined as into 7 (namely (III) individual option), resulting minimum accumulation turnover is
10, it is more than (II) the individual getable minimum accumulation turnover 5 of option institute, therefore the option reduces the effect for producing radio-frequency component
It is relatively poor.It should be noted, however, that because the level information that the level of the 4th source-information in Fig. 3 should refer to the 5th source-information comes
Determine, therefore before the accumulation turnover parameter for copying preceding description to analyze the 5th source-information, the level of the 3rd source-information is still
May there are other to preferably select, more precisely, the level of the 3rd source-information can parameter calculation circuit be transferred 120 calculated
Determined by decision-making circuit 130 again after the accumulation turnover parameter of each level associated by the 5th source-information, certain decision-making circuit
The level of the 3rd source-information also directly can be determined as 2 (because of its association to follow-up minimum accumulation turnover by 130 according to Such analysis
5)。
As it was previously stated, the level of the 4th source-information should be determined with reference to the level information of the 5th source-information in Fig. 3, because
Before decision, the level of the 4th source-information still has level -2,3 and -7 three kind of option for this, according to Fig. 4 a to Fig. 4 c and table 3,
Each option can correspond to three accumulation turnover parameters, during to avoid next analyzing the turnover parameter associated by the 5th source-information
Calculate excessively numerous and diverse, the present embodiment only retain minimum accumulation turnover parameter corresponding to each option as subsequent analysis it
With wherein the minimum accumulation turnover parameter 8 of the correspondence of level -2, the minimum accumulation turnover parameter 5 of the correspondence of level 3 and the correspondence of level -7 be most
It is small accumulation turnover parameter 10, but those skilled in the art can on demand or design specification retain it is more or less
Information with copy it is of the invention disclosure be analyzed.The level information of above-mentioned minimum accumulation turnover parameter 8,5,10 and its correlation
(level information comprising the three, the 4th and the 5th source-information) can be temporarily stored into storage circuit 110 so that turnover parameter is calculated
Circuit 120 and/or decision-making circuit 130 are used.How turnover parameter calculation circuit 120 discussed individually below calculates the 5th source letter
How the 5th turnover parameter associated by the level of breath, and decision-making circuit 130 determines the 4th source according to the 5th turnover parameter
The level of information limits its level options, and then determines the level of the 3rd source-information：
The level of (1) the 5th source-information is assumed to normal level 1：
Fig. 3, Fig. 5 a and upper table 3 are referred to, because the level of the 3rd source-information (may be respectively associated to for 2 or -3
The minimum accumulation turnover parameter 5 of each level of four source-informations, 8,10) and the level of the 4th source-information may be 3, -2
Or -7 and minimum turnover parameter 5,8 and 10 is corresponded to respectively, therefore turnover parameter calculation circuit 120 can copy the explanation of Fig. 2 to obtain
(its calculating process can be represented three preselected levels 4, -6 and -11 of the 5th source-information with following formula：(3-2)+3=4；(-
2-2)+(- 2)=- 6；[- 7- (- 3)]+(- 7)=- 11).Therefore, when it is assumed that the 5th source-information level be normal level 1,
Turnover parameter calculation circuit 120 can calculate the normal level 1 with the level differences of foregoing preselected level 4, -6, -11 to calculate
Multiple 5th is transferred, and (its calculating process can be represented parameter 3,7 and 12 with following formula：| 4-1 |=3；| -6-1 |=7；|-11-1|
=12), each the 5th turnover parameter is then transferred into parameter to obtain the institute of normal level 1 plus the corresponding the 4th respectively again
(its calculating process can be represented corresponding multiple accumulation turnover parameters 8,15,22 with following formula：3+5=8；7+8=15；12+10
=22), reckling is 8 in this three accumulation turnover parameters, it is meant that when the 5th turnover parameter be 3 and the 4th source-information it is tired
When product turnover parameter is 5, the accumulation turnover parameter of the 5th source-information is minimum, in other words, when decision-making circuit 130 is by the 5th
The level of source-information can when being set to 1, the level of the 4th source-information is set to 3 and the level of the 3rd source-information being set into 2
Obtain minimum accumulation turnover parameter 8.
The level of (2) the 5th source-informations is assumed to extend level 6：
Fig. 3, Fig. 5 b and upper table 3 are referred to, it is similar foregoing, because the level of the 3rd source-information may be for 2 or -3 (respectively
Associate to the minimum accumulation turnover parameter 5 of each level of the 4th source-information, 8,10) and the level of the 4th source-information may
Minimum turnover parameter 5,8 and 10 is corresponded to for 3, -2 or -7 and respectively, therefore turnover parameter calculation circuit 120 can copy saying for Fig. 2
Bright three preselected levels 4, -6 and -11 for obtaining the 5th source-information.Therefore, when it is assumed that the level of the 5th source-information is extension
Level 6, turnover parameter calculation circuit 120 can calculate the level differences of the extension level 6 and foregoing preselected level 4, -6, -11
To calculate multiple 5th turnover parameters 2,12 and 17, (its calculating process can be represented with following formula：| 4-6 |=2；| -6-6 |=
12；| -11-6 |=17), each the 5th turnover parameter is then transferred into parameter to obtain this plus the corresponding the 4th respectively again
(its calculating process can be represented multiple accumulation turnover parameters 7,20,27 corresponding to extension level 6 with following formula：2+5=7；12
+ 8=20；17+10=27), reckling is 7 in this three accumulation turnover parameters, it is meant that when the 5th turnover parameter is 2 and the 4th
When the minimum accumulation turnover parameter of source-information is 5, the accumulation turnover parameter of the 5th source-information is minimum, in other words, when
The level of the 5th source-information is set to 6, the level of the 4th source-information is set to 3 and believes the 3rd source by decision-making circuit 130
The level of breath is set to can obtain minimum accumulation turnover parameter 7 when 2.
The level of (3) the 5th source-informations is assumed to extend level -4：
Fig. 3, Fig. 5 c and upper table 3 are referred to, it is similar foregoing, because the level of the 3rd source-information may be for 2 or -3 (respectively
Associate to the minimum accumulation turnover parameter 5 of each level of the 4th source-information, 8,10) and the level of the 4th source-information may
Minimum turnover parameter 5,8 and 10 is corresponded to for 3, -2 or -7 and respectively, therefore turnover parameter calculation circuit 120 can copy saying for Fig. 2
Bright three preselected levels 4, -6 and -11 for obtaining the 5th source-information.Therefore, when it is assumed that the level of the 5th source-information is extension
Level -4, turnover parameter calculation circuit 120 can calculate the level difference of the extension level -4 and foregoing preselected level 4, -6, -11
It is different that to calculate multiple 5th turnover parameters 8,2 and 7, (its calculating process can be represented with following formula：| 4- (- 4) |=8；|-6-(-
4) |=2；| -11- (- 4) |=7), then again by each the 5th turnover parameter respectively plus corresponding 4th turnover parameter with
(its calculating process can be represented the multiple accumulation turnover parameters 13,10,17 for obtaining corresponding to the extension level -4 with following formula：8
+ 5=13；2+8=10；7+10=17), reckling is 10 in this three accumulation turnover parameters, it is meant that when the 5th turnover parameter
For 2 and the 4th the minimum accumulation turnover parameter of source-information be 8 when, the accumulation turnover parameter of the 5th source-information is minimum, is changed
Sentence is talked about, and the level of the 5th source-information is set into -4 when decision-making circuit, the level of the 4th source-information is set to -2 and by the
The level of three source-informations is set to can obtain minimum accumulation turnover parameter 10 when 2.
From the foregoing, option (1) to (3) is shown when the level of the 3rd source-information is set as 2 by decision-making circuit 130
When can cause minimum accumulation turnover parameter, therefore the level of the 3rd source-information can be defined as 2 with regard to this.In addition, in three options,
(2nd) individual option can obtain minimum accumulation turnover 7, and this is represented when the level of the 4th source-information is determined as 3 by decision-making circuit 130
And when the level of the 5th source-information is determined as into 6, the turnover of the level differences of accumulation is minimum, and can most effectively reduce high frequency
The generation of signal component.
In addition to foregoing device is invented, the present invention separately discloses a kind of signal level determining method, for determining a source
The level of signal, the method can be realized via device of the invention, it is also possible to be realized by other devices, the source signal and
The source-information that it is included is defined as described above, is no longer repeated in this.Fig. 6 is referred to, an embodiment of the method is included
The following steps：
Step S610：Storage one or all normal level and its equivalent extension level associated by multiple source-informations
Level information；
Step S620：The normal level associated by each source-information is calculated according to the level information and its equivalent prolong
Stretch multiple turnover parameters of level；And
Step S630：Foundation one or all the plurality of turnover parameter of the plurality of source-information determine that each source is believed
The level of breath.
The explanation of similar device embodiment, it is assumed that above-mentioned multiple source-informations include a kth source-information, a kth+1
Source information and the source-information of a kth+2, wherein kth source-information associate a kth normal level and an at least kth extends level,
The source-information of kth+1 associates the normal level of a kth+1 and at least a kth+1 extends level, and the source-information of kth+2 association one the
K+2 normal levels and at least a kth+2 extend level, then in an implementation aspect of the present embodiment, abovementioned steps S620 is included：
The normal level of kth+2 and this one or more is calculated respectively according to the level information of the kth, kth+1 and the source-information of kth+2
K+2 extends multiple kth+2 turnover parameter of level；And step S630 is included：According to the plurality of kth+2 turnover parameter by this
The level of k+2 source-informations is determined as the normal level of kth+2 or one or more kth+2 extend one of level.Separately
Outward, under identical hypothesis, in another implementation aspect of the present embodiment, step S620 is included：According to the kth, kth+1 and
The level information of k+2 source-informations calculates multiple that the normal level of kth+2 and one or more kth+2 extend level respectively
K+2 turnover parameters；And step S630 is included：The level of the kth source-information is determined according to the plurality of kth+2 turnover parameter
It is that the kth normal level or one or more kth extend one of level.Furthermore, under same hypothesis, in this implementation
In the another implementation aspect of example, step S620 is included：The kth+2 is determined according to the level information of the kth and the source-information of kth+1
An at least preselected level of source-information；And the normal level of kth+2 and one or more kth+2 extension level are calculated respectively
With multiple level differences of an at least preselected level, and the normal level of kth+2 is calculated according to this and one or more kth+2 are prolonged
Multiple kth+2 turnover parameter of level is stretched, meanwhile, step S630 can be included：According to the plurality of kth+2 turnover parameter by the kth
The level of source-information is determined as the kth normal level or one or more kth extend one of level；Or foundation should
Multiple kth+2 turnover parameters by the level of the source-information of kth+2 be determined as the normal level of kth+2 or one or more kth+
2 extend one of level.
Additionally, described in similar device embodiment, step S630 can further include：It is many according to each source-information this
The normal level and/or the extension level in individual turnover parameter associated by minimum one or more persons are believed determining each source
The level of breath.
The explanation of aforementioned means embodiment is see due to those skilled in the art to be fully understood by method
Embodiment is simultaneously implemented according to this, therefore, in the case of the abundant disclosure of the method embodiment and exploitativeness is not influenceed, repeat and
Unnecessary explanation gives memorandum herein.It should be noted, however, that the step of present method invention expresses order unless had in step, it is no
Then have no the restriction of execution sequence.
In sum, presently disclosed signal level determination device can reduce the turnover of signal level with method, and
The radio-frequency component for producing signal can be reduced, and then is avoided on the premise of a predetermined specifications (such as an electromagnetic interference specification) are met
Or reduce the loss of signal transmission distance and transmission quantity.
Although embodiments of the invention as described above, but these embodiments be not used for limiting the present invention, this technology neck
The those of ordinary skill in domain can impose change to technical characteristic of the invention according to the content expressed or imply of the invention, it is all this
Many variations may belong to the patent protection category sought by the present invention, and in other words, scope of patent protection of the invention must be regarded
The as defined in claim of this specification is defined.
Claims (20)
1. a kind of signal level determination device, for determining the level of a source signal, the source signal is on a time shaft
Sequentially comprising multiple source-informations, one of each described source-information correspondence multiple normal level, each is described normal
Level is equivalent at least one of multiple extension level, and the signal level determination device is included：
One storage circuit, for the normal level stored associated by part or all of the multiple source-information and its waits
Effect extends the level information of level；
One turnover parameter calculation circuit, described in being calculated according to the level information associated by each described source-information
Multiple turnover parameters of normal level and its equivalent extension level；And
One decision-making circuit, it is every for being determined according to the multiple turnover parameter of part or all of the multiple source-information
The level of the individual source-information.
2. signal level determination device according to claim 1, wherein, the multiple number for extending level is equal to 2 ×
The number of (2M+1) the multiple normal level again, the M is positive integer.
3. signal level determination device according to claim 1, wherein, the decision-making circuit is according to letter of being originated each described
Described normal associated by minimum one or more and/or extend level and determine each in the multiple turnover parameter of breath
The level of the source-information.
4. signal level determination device according to claim 1, wherein, the multiple source-information includes kth source
Information, the source-information of a kth+1 and the source-information of a kth+2, the kth source-information associate a kth normal level and at least
One kth extends level, and the source-information of kth+1 association normal level of one kth+1 and at least extension of a kth+1 level are described
The source-information of kth+2 associates the normal level of a kth+2 and at least a kth+2 extends level, and the k is positive integer.
5. signal level determination device according to claim 4, wherein, the storage circuit stores kth source letter
The level information of breath, the source-information of kth+1 and the source-information of kth+2；The turnover parameter calculation circuit is according to institute
The level information of kth source-information, the source-information of kth+1 and the source-information of kth+2 is stated to calculate the kth respectively
+ 2 normal levels and an at least kth+2 extend multiple kth+2 turnover parameter of level；And the decision-making circuit is according to institute
State multiple kth+2 turnover parameters by the level of the source-information of kth+2 be determined as the normal level of kth+2 or it is described at least
One kth+2 extends one of level.
6. signal level determination device according to claim 5, wherein, the step of the turnover parameter calculation circuit is performed
Comprising：
The source-information of kth+2 is determined according to the level information of the kth source-information and the source-information of kth+1
An at least preselected level；And
The normal level of kth+2 is calculated respectively and an at least kth+2 extends level and an at least preselected level
Multiple level differences, and the multiple turnover of kth+2 parameter is calculated according to this.
7. signal level determination device according to claim 6, wherein, the multiple level differences be the multiple kth+
2 turnover parameters.
8. signal level determination device according to claim 6, wherein, the multiple kth+1 of storage circuit storage are transferred
Parameter, the multiple turnover of kth+1 parameter is respectively associated to the normal level of kth+1 and an at least kth+1 and extends electricity
It is flat, and the turnover parameter calculation circuit included the step of perform：
The multiple turnover of kth+2 parameter is calculated according to the multiple kth+1 turnover parameter and the multiple level differences.
9. signal level determination device according to claim 4, wherein, the storage circuit stores kth source letter
The level information of breath, the source-information of kth+1 and the source-information of kth+2；The turnover parameter calculation circuit is according to institute
The level information of kth source-information, the source-information of kth+1 and the source-information of kth+2 is stated to calculate the kth respectively
+ 2 normal levels and an at least kth+2 extend multiple kth+2 turnover parameter of level；And the decision-making circuit is according to institute
State multiple kth+2 turnover parameters and the level of the kth source-information is determined as the kth normal level or described at least 1 the
K extends one of level.
10. signal level determination device according to claim 9, wherein, the step that the turnover parameter calculation circuit is performed
Suddenly include：
The source-information of kth+2 is determined according to the level information of the kth source-information and the source-information of kth+1
An at least preselected level；And
The normal level of kth+2 is calculated respectively and an at least kth+2 extends level and an at least preselected level
Multiple level differences, to calculate the multiple turnover of kth+2 parameter.
11. signal level determination devices according to claim 10, wherein, multiple+1 turn of the kth of storage circuit storage
Folding parameter, the multiple turnover of kth+1 parameter is respectively associated to the normal level of kth+1 and an at least kth+1 and extends
Level, and the turnover parameter calculation circuit included the step of perform：
The multiple turnover of kth+2 parameter is calculated according to the multiple kth+1 turnover parameter and the multiple level differences.
12. signal level determination devices according to claim 4, wherein, the storage circuit stores kth source letter
The level information of breath, the source-information of kth+1 and the source-information of kth+2, and the turnover parameter calculation circuit execution
The step of include：
The source-information of kth+2 is determined according to the level information of the kth source-information and the source-information of kth+1
An at least preselected level；And
The normal level of kth+2 is calculated respectively and an at least kth+2 extends level and an at least preselected level
Multiple level differences, and multiple kth+2 of the normal level of kth+2 and an at least kth+2 extension level are calculated according to this
Turnover parameter.
A kind of 13. signal level determining methods, for determining the level of a source signal, the source signal is in a time series
On sequentially comprising multiple source-informations, one of each described source-information correspondence multiple normal level, each is described just
Normal level is equivalent at least one of multiple extension level, and the signal level determining method is determined by a signal level
Device is realized, comprised the steps of：
Store the electricity of the normal level and its equivalent extension level associated by part or all of the multiple source-information
Ordinary mail ceases；
The normal level and its equivalent extension electricity associated by each described source-information are calculated according to the level information
Flat multiple turnover parameters；And
Each described source-information is determined according to the multiple turnover parameter of part or all of the multiple source-information
Level.
14. signal level determining methods according to claim 13, wherein, determine the level of each source-information
Step is included：Described in associated by one or more minimum in the multiple turnover parameter of source-information each described
It is normal and/or described extend level to determine the level of each source-information.
15. signal level determining methods according to claim 13, wherein, the multiple source-information comes comprising a kth
Source information, the source-information of a kth+1 and the source-information of a kth+2, the kth source-information associate a kth normal level and extremely
A few kth extends level, at least source-information of kth+1 association normal level of one kth+1 and the extension of a kth+1 level, institute
State the source-information of kth+2 association normal level of one kth+2 and at least a kth+2 extends level.
16. signal level determining methods according to claim 15, wherein, calculate it is the multiple turnover parameter the step of wrap
Contain：Counted respectively according to the level information of the kth source-information, the source-information of kth+1 and the source-information of kth+2
Calculate the normal level of kth+2 and an at least kth+2 extends multiple kth+2 turnover parameter of level, and determine each
The step of level of the source-information, includes：According to the multiple kth+2 turnover parameter by the electricity of the source-information of kth+2
It is flat to be determined as one of the normal level of kth+2 or an at least kth+2 extension level.
17. signal level determining methods according to claim 15, wherein, calculate it is the multiple turnover parameter the step of wrap
Contain：Counted respectively according to the level information of the kth source-information, the source-information of kth+1 and the source-information of kth+2
Calculate the normal level of kth+2 and an at least kth+2 extends multiple kth+2 turnover parameter of level, and determine each
The step of level of the source-information, includes：According to the multiple kth+2 turnover parameter by the level of the kth source-information
It is determined as the kth normal level or an at least kth extends one of level.
18. signal level determining methods according to claim 15, wherein, calculate it is the multiple turnover parameter the step of wrap
Contain：
The source-information of kth+2 is determined according to the level information of the kth source-information and the source-information of kth+1
An at least preselected level；And
The normal level of kth+2 is calculated respectively and an at least kth+2 extends level and an at least preselected level
Multiple level differences, and multiple kth+2 of the normal level of kth+2 and an at least kth+2 extension level are calculated according to this
Turnover parameter.
19. signal level determining methods according to claim 18, wherein, determine the level of each source-information
Step is included：
The level of the kth source-information is determined as the kth normal level or institute according to the multiple kth+2 turnover parameter
State an at least kth and extend one of level；Or
The level of the source-information of kth+2 is determined as the normal level of kth+2 according to the multiple kth+2 turnover parameter
Or an at least kth+2 extends one of level.
20. signal level determining methods according to claim 13, wherein, the source signal is a pulse-amplitude modulation
Signal.
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