CN100596023C - Harmonious wave elimination system and electronic system and method for eliminating total harmonious wave distortion - Google Patents
Harmonious wave elimination system and electronic system and method for eliminating total harmonious wave distortion Download PDFInfo
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Abstract
The invention provides a harmonic elimination system, an electronic system capable of eliminating total harmonic distortion and a method thereof, wherein, the electronic system capable of eliminatingtotal harmonic distortion comprises a harmonic elimination system, a signal processing system and a coefficient supply unit, wherein, the harmonic elimination system is used to carry out N-th power operation for an input signal which is then multiplied by a first coefficient to generate a first signal; the first signal is added to the input signal so as to generate a second signal; the signal processing system is used for outputting an output signal according to the second signal; the coefficient supply unit is used for selecting one coefficient from a plurality of accommodation coefficients as a first coefficient in order to effectively eliminate N harmonic distortion of the electronic system. The harmonic elimination system, the electronic system capable of eliminating total harmonic distortion and the method of the invention can improve the total harmonic distortion of the whole electronic system.
Description
Technical field
The present invention is relevant for a kind of electronic system, relevant especially a kind of electronic system of eliminating total harmonic distortion with and eliminate the method for total harmonic distortion.
Background technology
After the processing of voice signal through an electronic circuit (system), the voice signal of being exported will have certain distortion.Generally speaking, total harmonic distortion (totalharmonic distortion; THD) in order to representing that this distortion accounts for the ratio of whole output signal, and total harmonic distortion is the sum total of harmonic distortion energy, and is normally lower better.
Fig. 1 is a schematic diagram of an electronic system.As shown in Figure 1, the transfer function of system is H (x), and input signal IN is X, and output signal OUT can be X.H (x).If consider distorted signals, output signal OUT will be expressed as aX+bX
2+ cX
3..., bX wherein
2Be second harmonic distortion, cX
3Be third harmonic distortion, by that analogy.
If only consider second harmonic distortion, and when not considering harmonic distortion more than three times, total harmonic distortion system equals the energy of the energy of harmonic distortion divided by signal, promptly
In other words, if the absolute value of the coefficient b of second harmonic distortion is littler, the value of total harmonic distortion will be littler, and promptly the total harmonic distortion characteristic of electronic system will be better.
Summary of the invention
The invention provides a kind of electronic system of eliminating total harmonic distortion, comprise harmonic wave elimination system, in order to an input signal is carried out the Nth power computing, multiply by one first coefficient again, to produce a secondary signal, again with secondary signal and input signal addition, to produce one the 3rd signal; One signal processing system in order to according to the 3rd signal, is exported an output signal; And one coefficient the unit is provided, in order to from a plurality of adjustment factors, to select one, make that the N subharmonic distortion of electronic system is eliminated effectively as first coefficient.
The present invention also provides a kind of electronic system of eliminating total harmonic distortion, comprises a signal processing system, in order to according to an input signal, exports one first signal; One harmonic wave is eliminated system, and it is connected with described signal processing system, in order to first signal is carried out the Nth power computing, multiply by one first coefficient again, to produce a secondary signal, again with first signal, secondary signal addition, to produce an output signal; And one coefficient the unit is provided, it is connected with described harmonic wave elimination system, comprise that a digital signal processing module, a digital analog converter and an analog-digital converter connect in proper order, wherein digital analog converter is coupled between digital signal processing module and the signal processing system, analog-digital converter is coupled to harmonic wave and eliminates between system and the digital signal processing module, coefficient provides the unit in order to select one as first coefficient from a plurality of adjustment factors, makes that the N subharmonic distortion of electronic system is eliminated effectively.
The present invention also provides a kind of electronic system of eliminating total harmonic distortion, comprises harmonic wave elimination system, in order to an input signal is carried out the Nth power computing, multiply by one first coefficient again, to produce one first signal, again with first signal and input signal addition, to produce a secondary signal; One signal processing system, it is connected with described harmonic wave elimination system, in order to according to secondary signal, exports an output signal; And one coefficient the unit is provided, in order to from a plurality of adjustment factors, to select one as first coefficient, make that the N subharmonic distortion of electronic system is eliminated effectively, wherein coefficient provides the unit to comprise a digital signal processing module, it is connected with harmonic wave elimination system, in order to a pending signal to be provided, and a plurality of adjustment factors are provided seriatim to harmonic wave eliminate system, cause harmonic wave elimination system to produce corresponding a plurality of the 3rd signals and export signal processing system to, and make signal processing system produce a plurality of respective signal according to a plurality of the 3rd signals; One digital analog converter, it is connected with described digital signal processing module, after pending conversion of signals is become an analog signal, exports harmonic wave to and eliminates system; An and analog-digital converter, it is connected with described signal processing system, export digital signal processing module in order to respective signal is converted to a plurality of digital signals, make digital signal processing module carry out the total harmonic distortion analysis to digital signal, find out a pairing adjustment factor of total harmonic distortion value minimum, as first coefficient.
The present invention also provides a kind of electronic system of eliminating total harmonic distortion, comprises a signal processing system, in order to according to an input signal, exports one first signal; One harmonic wave is eliminated system, and it is connected with described signal processing system, in order to first signal is carried out the Nth power computing, multiply by one first coefficient again, to produce a secondary signal, again with first signal, secondary signal addition, to produce an output signal; And one coefficient the unit is provided, in order to from a plurality of adjustment factors, to select one as first coefficient, make that the N subharmonic distortion of electronic system is eliminated effectively, wherein coefficient provides the unit to comprise a digital signal processing module, it is connected with described harmonic wave elimination system, in order to a pending signal to be provided, cause signal processing system to export one the 3rd signal to harmonic wave and eliminate system, and a plurality of adjustment factors are provided seriatim to harmonic wave eliminate system, make harmonic wave eliminate system, produce a plurality of respective signal according to above-mentioned the 3rd signal and a plurality of adjustment factor; One digital analog converter, it is connected with described digital signal processing module, after pending conversion of signals is become an analog signal, exports signal processing system to; An and analog-digital converter, it is connected with described signal processing system, export digital signal processing module in order to respective signal is converted to a plurality of digital signals, make digital signal processing module carry out the total harmonic distortion analysis to digital signal, find out a pairing adjustment factor of total harmonic distortion value minimum, as first coefficient.
The present invention also provides a kind of method of eliminating total harmonic distortion, comprises that coupling a harmonic wave eliminates system between a signal processing system and an input signal; Input signal is carried out the Nth power computing, to produce one first signal; With first signal times with first coefficient, to produce secondary signal; With secondary signal and input signal addition, export signal processing system to produce one the 3rd signal, make signal processing system export an output signal; And from a plurality of adjustment factors, select one as first coefficient, make that the N subharmonic distortion of electronic system is eliminated effectively.
The present invention more provides a kind of method of eliminating total harmonic distortion, comprises coupling the output that a harmonic wave is eliminated system's to a signal processing system, in order to receive one first signal; First signal is carried out the Nth power computing, to produce a secondary signal; Secondary signal be multiply by first coefficient, to produce the 3rd signal; With first signal, the 3rd signal plus, producing an output signal, and from a plurality of adjustment factors, select one as first coefficient, make that the N subharmonic distortion of electronic system is eliminated effectively.
The present invention also provides a kind of harmonic wave to eliminate system, couple the signal processing system in the electronic system, and harmonic wave elimination system comprises a Nth power device, in order to an input signal is carried out the Nth power computing, to produce one first signal; One multiplier, in order to first signal times with one first coefficient, to produce a secondary signal; An and adder, in order to above-mentioned secondary signal and above-mentioned input signal addition, export above-mentioned signal processing system to produce one the 3rd signal, the total harmonic distortion of above-mentioned electronic system is eliminated by above-mentioned first coefficient of control by wherein above-mentioned harmonic wave elimination system.
Harmonic wave of the present invention is eliminated system, the electronic system that can eliminate total harmonic distortion and method, can improve the total harmonic distortion of whole electronic system.
Description of drawings
Fig. 1 is a schematic diagram of an electronic system.
Fig. 2 is an embodiment of an electronic system of the present invention.
Fig. 3 eliminates an embodiment of system for harmonic wave.
Fig. 4 is another embodiment of electronic system of the present invention.
Fig. 5 is another embodiment of electronic system.
Fig. 6 is another embodiment of electronic system.
Embodiment
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, a preferred embodiment cited below particularly, and cooperate appended diagram, be described in detail below.
The positive and negative genuine polarity of second harmonic, the just offset direction of second harmonic distortion represented of the coefficient b of second harmonic distortion in Fig. 1 electronic system.Though this directivity can not influence the value of total harmonic distortion,, can offset some distortions by this polarity if when two electronic systems are in series.Therefore, the polarity and size of coefficient is suitably selected in the embodiments of the invention utilization, by the mode of cancelling each other on the contrary, offsets some second harmonic distortions.
Fig. 2 is an embodiment of an electronic system of the present invention.As shown in Figure 2, electronic system 100A comprises a signal processing system 10 and harmonic wave elimination system 20, and wherein the transfer function of signal processing system 10 is F
A(X), and the harmonic wave transfer function of eliminating system 20 be F
B(X).Suppose that input signal IN is X, then can draw output signal OUT is X.F
B(X) .F
A(X).
For example, input signal IN can be a voice signal, but is not limited to this.In this embodiment, eliminate 20 couples of input signal IN of system by harmonic wave and do preliminary treatment, export signal processing system 10 again to, make the total harmonic distortion of whole electronic system 100A to eliminate effectively.Harmonic wave eliminate the structure of system 20 and action specification as after.
Fig. 3 eliminates an embodiment of system for harmonic wave.As shown in Figure 3, harmonic wave elimination system 20 comprises a squaring device 21, a multiplier 22 and an adder 23.Squaring device 21 (is X in order to input signal IN (being X) square so that obtain a signal SA
2).Multiplier 22 (is r X in order to signal SA is multiplied by r doubly so that obtain a signal SB
2), wherein r is a non-vanishing positive number or negative.Adder 23 (is X+r X in order to input signal IN and signal SB addition so that obtain a signal IN1
2), export signal processing system 10 to.
Suppose the transfer function F of signal processing system 10
A(X) be aX+bX
2, because signal IN1 is X+r X
2So the output signal OUT of whole electronic system 100A system can be expressed as among Fig. 2:
OUT＝a(X+rX
2)+b(X+rX
2)
2＝aX+(ar+b)X
2+2brX
3+br
2X
4。
Therefore, the second harmonic distortion of electronic system 100A is
So if ar+b=0 or approach zero can eliminate second harmonic distortion effectively, and the value of total harmonic distortion (THD) also can reduce effectively, and promptly the total harmonic distortion characteristic of electronic system 100A will be better.In other words, if the size (value) by suitably selecting coefficient r and its sign (polarity), make ar+b=0 or approach zeroly, the second harmonic distortion of electronic system 100A will be eliminated effectively.
Fig. 4 is another embodiment of electronic system of the present invention.As shown in Figure 4, electronic system 100B is similar to the electronic system 100A shown in Fig. 2, its difference is input signal IN among the electronic system 100B " be to input to signal processing system 10 earlier, again signal OUT1 is exported to harmonic wave after the processing and eliminate system 20, to produce output signal OUT ".In other words, as input signal IN " be X, the transfer function of signal processing system 10 is F
B(X), and the harmonic wave transfer function of eliminating system 20 be F
A(X), output signal OUT then " be X.F
B(X) .F
A(X), identical with output signal OUT among the electronic system 100A.In other words, the output signal OUT of whole electronic system 100B among Fig. 4 " can be expressed as:
OUT”＝a(X+rX
2)+b(X+rX
2)
2＝aX+(ar+b)X
2+2brX
3+br
2X
4。
Therefore, size (value) and its sign (polarity) that present embodiment equally can be by suitably selecting coefficient r make and ar+b=0 or approach zero eliminate the second harmonic distortion of electronic system 100B.
In certain embodiments, harmonic wave is eliminated system 20 also can pass through one cube of device (not shown), replaces the squaring device 21 among Fig. 3, after input signal IN is taken advantage of 3 powers, is multiplied by r doubly via multiplier 22 again, so that signal can become X+r X by IN1
3Therefore, as if the harmonic wave of only considering below three times, the output signal OUT of electronic system 100A and 100B and OUT " can become:
OUT＝a(X+rX
3)+b(X+rX
3)
2+c(X+rX
3)
3＝aX+bX
2+(ar+c)X
3。
At this moment, size (value) and its sign (polarity) that can be by suitably selecting coefficient r make and ar+c=0 or approach zero eliminate third harmonic distortion.In addition, the present invention also can change a Nth power device by the squaring device 21 of harmonic wave being eliminated system 20 into, in order to input signal is carried out the Nth power computing, suitably select the size (value) and its sign (polarity) of coefficient r again, make the Nth power item be 0 or approach zero, eliminate the distortion of N subharmonic.
In other words, the transfer function of electronic system of the present invention is eliminated system and relevant with coefficient r by a harmonic wave, and when suitably adjusting coefficient r, the total harmonic distortion of electronic system can be eliminated effectively.
Fig. 5 is another embodiment of electronic system.As shown in Figure 5, electronic system 200A is the total harmonic distortion of control system (THD) automatically, and comprises a signal processing system 10A, the harmonic wave elimination 20A of system, a digital signal processing module 30, a digital analog converter 40 and an analog-digital converter 50.In this embodiment, signal processing system 10A is considered as a system that is calibrated, and it is similar to the signal processing unit 10 shown in Fig. 4 to Fig. 2, but be not limited to this, provide unit 60 and digital signal processing module 30, digital analog converter 40 and analog-digital converter 50 can be considered a coefficient.
Harmonic wave is eliminated the 20A of system in order to by a specific algorithm, signal is handled, and the signal after will handling exports signal processing system 10A to, makes the total harmonic distortion (THD) of whole system to be improved.For example, the structure that harmonic wave is eliminated the 20A of system and acts may and harmonic wave elimination system 20 shown in Figure 3 are similar, are not repeated in this.
Digital signal processing module 30 is eliminated the 20A of system in order to an optimum coefficient to harmonic wave optionally to be provided, make harmonic wave eliminate the 20A of system by specific algorithm, received signal is handled, so that improve the total harmonic distortion (THD) of whole electronic system 200A.
As shown in Figure 5, the digital signal processing module 30 coefficient information table 32 that can prestore, n coefficient, for example r eliminating in order to record control harmonic wave
1～r
n, r wherein
1Can be a higher limit, and r
nCan be a lower limit.For example, digital signal processing module 30 as the coefficient r that is provided among Fig. 3, makes the total harmonic distortion of electronic system 200A to eliminate effectively in order in n the coefficient to be provided in the coefficient information table 32.
In the action, digital signal processing module 30 can be with the coefficient (r in the coefficient information table 32
1～r
n), by coefficient r
1To coefficient r
nProvide seriatim to the harmonic wave elimination 20A of system.Therefore, in the coefficient (r that receives from digital signal processing module 30
1～r
n) time, harmonic wave is eliminated the 20A of system then can handle a preprocessed signal by specific algorithm, and the signal after the output processing is to signal processing system 10A.So signal processing system 10A handles the signal that the harmonic wave elimination 20A of system is exported, and exports the signal of a correspondence.Then, the signal that 30 couples of signal processing system 10A of digital signal processing module are exported carries out the analysis of total harmonic distortion, and notes the result of analysis, so that find out the coefficient (r of coefficient information table 32
1～r
n) in what person be an optimum coefficient, can be so that the total harmonic distortion minimum of electronic system 200A.
For example, when initial, digital signal processing module 30 can send a pending signal S0 to digital analog converter 40, sends a conditioning signal S1 simultaneously, eliminate the 20A of system to harmonic wave, wherein conditioning signal S1 comprises in order to the coefficient of regulating harmonic distortion (r for example
1) with the information of sign, in other words, the coefficient r shown in the conditioning signal S1 representative graph 3.Digital analog converter 40 can convert pending signal S0 to one analog signal S2 and export the harmonic wave elimination 20A of system again to.After receiving conditioning signal S1 and analog signal S2, harmonic wave is eliminated the 20A of system can be by specific algorithm, and S2 handles to analog signal, provides a signal S3 to signal processing system 10A then.
After receiving signal S3, the processing that signal processing system 10A can be correlated with, and export a signal S4.50 of analog-digital converters convert a digital signal S5 in order to the signal S4 that signal processing system 10A is exported, and export digital signal processing module 30 to.Then, digital signal processing module 30 can carry out the analysis of total harmonic distortion to digital signal S5, promptly obtains the value of a total harmonic distortion, and notes the result of analysis.
Then, digital signal processing module 30 can be reissued pending signal S0 to digital analog converter 40, sends conditioning signal S1 simultaneously and eliminates the 20A of system to harmonic wave, and this moment, conditioning signal S1 comprised that another is in order to coefficient of regulating harmonic distortion (r for example
2) with the information of sign.Therefore, digital signal processing module 30 can obtain the value of another total harmonic distortion, and it is noted.Repeat abovementioned steps, digital signal processing module 30 can obtain corresponding to n in order to the coefficient of regulating harmonic distortion (r for example
1～r
n) the value of total harmonic distortion.
So digital signal processing module 30 can be found out one of minimum in the value of this n total harmonic distortion, and with its pairing coefficient as an optimum coefficient, provide regularly to harmonic wave and eliminate the 20A of system.In other words, electronic system 200A can carry out harmonic wave to input signal IN to be eliminated, and produces output signal OUT.At this moment, digital signal processing module 30 only provides optimum coefficient to harmonic wave to eliminate the 20A of system, no longer export pending signal S0, so digital analog converter 40 is also no longer exported digital signal S2, and the signal S4 that analog and digital signal is also no longer exported signal processing system 10A changes into digital signal S5.
Harmonic wave is provided by the optimum coefficient algorithm specific with it that the 20A of system can utilize digital signal processing module 30 to be provided, IN handles to input signal, to handle signal IN1 later again and export signal processing system 10A to, and make the total harmonic distortion (THD) of whole system to be improved.
Specific algorithm described in the present embodiment can be the mode described in Fig. 3, by squaring device 21 input signal IN is carried out square operation exactly, (is X so that obtain signal SA
2).Then, by multiplier 22 signal SA being multiplied by r doubly, (is r X so that obtain signal SB
2), wherein r is a non-vanishing positive number or negative.Adder 23 (is X+rX in order to input signal IN and signal SB addition so that obtain signal IN1
2).Or say, input signal IN is carried out 3 power computings after, be multiplied by r doubly via multiplier 22 again, so that signal IN1 can become X+r X
3The rest may be inferred, and it (is X that input signal IN is carried out the Nth power computing
N), multiply by r doubly via multiplier 22 again, then with input signal IN and signal SB addition, so that signal IN1 is X+r X
N, but be not limited to this.
Because digital signal processing module 30 resulting optimum coefficient (r
1, r
2, r
3... or r
n) available so that ar+b=0 or approach zero, eliminate second harmonic distortion, or make ar+c=0 or approach zero, eliminate third harmonic distortion, so when digital signal processing module 30 provides optimum coefficient, harmonic wave is eliminated the 20A of system can reduce the harmonic distortion of a certain specific exponent number effectively, so can improve the total harmonic distortion (THD) of whole electronic system 200A.
Fig. 6 is another embodiment of electronic system.As shown in Figure 6, electronic system 200B system is similar to the electronic system 200A shown in Fig. 5, its difference is input signal IN among the electronic system 200B " input to signal processing system 10B earlier, the signal after will handling again exports harmonic wave to and eliminates the 20B of system, to produce output signal OUT ".Similarly, the n in the digital signal processing module 30 available factor information tables is in order to the coefficient of regulating harmonic distortion (r for example
1～r
n), obtain the value of n total harmonic distortion.Then, find out minimum one in the value by this n total harmonic distortion, and with its pairing coefficient as an optimum coefficient, provide regularly to harmonic wave and eliminate the 20B of system.
For example, when initial, digital signal processing module 30 can send a pending signal S0 " to digital analog converter 40, send a conditioning signal S1 simultaneously ", eliminate the 20B of system to harmonic wave, wherein conditioning signal S1 comprises in order to the coefficient of regulating harmonic distortion (r for example
1) with the information of sign.Digital analog converter 40 can be with pending signal S0 ", convert an analog signal S2 to " export signal processing system 10B again to.In receiving analog signal S2 " after, the processing that can be correlated with, and export a signal S3 ".
In receiving to signal S3 " afterwards, harmonic wave is eliminated the 20B of system can be by specific algorithm, to signal S3 " handle, a signal S4 is provided then " to analog-digital converter 50.50 of analog-digital converters are in order to eliminate harmonic wave the signal S4 that the 20B of system is exported " convert a digital signal S5 to ", export digital signal processing module 30 to.Then, digital signal processing module 30 meetings are to digital signal S5 " carry out the analysis of total harmonic distortion, promptly obtain the value of a total harmonic distortion, and note the result of analysis.
Then, digital signal processing module 30 can be reissued pending signal S0 " to digital analog converter 40, send conditioning signal S1 simultaneously " eliminate the 20B of system to harmonic wave, this moment conditioning signal S1 " comprise that another is in order to coefficient of regulating harmonic distortion (r for example
2) with the information of sign.Therefore, digital signal processing module 30 can obtain the value of another total harmonic distortion, and it is noted.Repeat abovementioned steps, digital signal processing module 30 can obtain corresponding to n in order to the coefficient of regulating harmonic distortion (r for example
1～r
n) the value of total harmonic distortion.So digital signal processing module 30 can be found out one of minimum in the value of this n total harmonic distortion, and with its pairing coefficient as an optimum coefficient, provide regularly to harmonic wave and eliminate the 20B of system.In other words, electronic system 200B can be to input signal IN " carry out harmonic wave and eliminate, and produce output signal OUT ".
So far, harmonic wave is eliminated the 20B of system can utilize this optimum coefficient and specific algorithm, and the signal after signal processing system 10B handles is handled, so that improve the total harmonic distortion (THD) of whole system.Specific algorithm described in the present embodiment is identical with algorithm noted earlier, is not repeated in this.
The above only is preferred embodiment of the present invention; so it is not in order to limit scope of the present invention; any personnel that are familiar with this technology; without departing from the spirit and scope of the present invention; can do further improvement and variation on this basis, so the scope that claims were defined that protection scope of the present invention is worked as with the application is as the criterion.
Being simply described as follows of symbol in the accompanying drawing:
10,10A, 10B: signal processing system
20,20A, 20B: harmonic wave is eliminated system
21: squaring device
22: multiplier
23: adder
30: digital signal processing module
32: the coefficient information table
40: digital analog converter
50: analog-digital converter
60: coefficient provides the unit
100A, 100B, 200A, 200B: electronic system
IN, IN ": input signal
OUT, OUT ": output signal
S0, S0 ": pending signal
S1, S1 ": conditioning signal
S2, S2 ": analog signal
S5, S5 ": digital signal
SA, SB, IN1, S3, S4, S3 ", S4 ": signal.
Claims (12)
1. the electronic system that can eliminate total harmonic distortion is characterized in that, comprising:
One signal processing system in order to according to an input signal, is exported one first signal;
One harmonic wave is eliminated system, and it is connected with described signal processing system, in order to above-mentioned first signal is carried out the Nth power computing, multiply by one first coefficient again, to produce a secondary signal, again with above-mentioned first signal, secondary signal addition, to produce an output signal; And
One coefficient provides the unit, it is connected with described harmonic wave elimination system, comprise a digital signal processing module, one digital analog converter and an analog-digital converter are connected in proper order, wherein above-mentioned digital analog converter is coupled between above-mentioned digital signal processing module and the above-mentioned signal processing system, above-mentioned analog-digital converter is coupled to above-mentioned harmonic wave and eliminates between system and the above-mentioned digital signal processing module, above-mentioned coefficient provides the unit in order to select one as above-mentioned first coefficient from a plurality of adjustment factors, makes that the N subharmonic distortion of above-mentioned electronic system is eliminated effectively.
2. the electronic system of eliminating total harmonic distortion according to claim 1 is characterized in that, above-mentioned harmonic wave elimination system comprises:
One Nth power device is in order to carry out the Nth power computing with above-mentioned first signal, to produce one the 4th signal;
One multiplier, in order to above-mentioned the 4th signal times with above-mentioned first coefficient, to produce above-mentioned secondary signal; And
One adder is in order to above-mentioned first signal, secondary signal addition, to produce above-mentioned output signal.
3. the electronic system of eliminating total harmonic distortion according to claim 2 is characterized in that,
Above-mentioned digital signal processing module is in order to provide a pending signal, cause above-mentioned signal processing system to export one the 5th signal to above-mentioned harmonic wave and eliminate system, and above-mentioned a plurality of adjustment factors are provided seriatim to above-mentioned harmonic wave eliminate system, make above-mentioned harmonic wave eliminate system, produce a plurality of respective signal according to above-mentioned the 5th signal and above-mentioned a plurality of adjustment factor;
Above-mentioned digital analog converter exports above-mentioned signal processing system in order to after above-mentioned pending conversion of signals is become an analog signal; And
Above-mentioned analog-digital converter exports above-mentioned digital signal processing module in order to convert above-mentioned a plurality of respective signal to a plurality of digital signals, make above-mentioned digital signal processing module carry out the total harmonic distortion analysis to above-mentioned digital signal, find out a pairing adjustment factor of total harmonic distortion value minimum, as above-mentioned first coefficient.
4. the electronic system of eliminating total harmonic distortion according to claim 3 is characterized in that, above-mentioned digital signal processing module comprises that a coefficient information table is in order to put down in writing above-mentioned a plurality of adjustment factor.
5. the electronic system of eliminating total harmonic distortion according to claim 1, it is characterized in that, when N was 2, above-mentioned first coefficient that system can provide the unit to provide according to above-mentioned coefficient was provided for above-mentioned harmonic wave, eliminated the second harmonic distortion of above-mentioned electronic system.
6. the electronic system that can eliminate total harmonic distortion is characterized in that, comprising:
One harmonic wave is eliminated system, in order to an input signal is carried out the Nth power computing, multiply by one first coefficient again, to produce one first signal, again with above-mentioned first signal and above-mentioned input signal addition, to produce a secondary signal;
One signal processing system, it is connected with described harmonic wave elimination system, in order to according to above-mentioned secondary signal, exports an output signal; And
One coefficient provides the unit, makes that as above-mentioned first coefficient N subharmonic distortion of above-mentioned electronic system is eliminated effectively in order to select one from a plurality of adjustment factors, and wherein above-mentioned coefficient provides the unit to comprise:
One digital signal processing module, it is connected with described harmonic wave elimination system, in order to a pending signal to be provided, and above-mentioned a plurality of adjustment factors are provided seriatim to above-mentioned harmonic wave eliminate system, cause corresponding a plurality of the 3rd signals of above-mentioned harmonic wave elimination system's generation to export above-mentioned signal processing system to, and make above-mentioned signal processing system produce a plurality of respective signal according to above-mentioned a plurality of the 3rd signals;
One digital analog converter, it is connected with described digital signal processing module, after above-mentioned pending conversion of signals is become an analog signal, exports above-mentioned harmonic wave to and eliminates system; And
One analog-digital converter, it is connected with described signal processing system, export above-mentioned digital signal processing module in order to convert above-mentioned a plurality of respective signal to a plurality of digital signals, make above-mentioned digital signal processing module carry out the total harmonic distortion analysis to above-mentioned digital signal, find out a pairing adjustment factor of total harmonic distortion value minimum, as above-mentioned first coefficient.
7. the electronic system that can eliminate total harmonic distortion is characterized in that, comprising:
One signal processing system in order to according to an input signal, is exported one first signal;
One harmonic wave is eliminated system, and it is connected with described signal processing system, in order to above-mentioned first signal is carried out the Nth power computing, multiply by one first coefficient again, to produce a secondary signal, again with above-mentioned first signal, secondary signal addition, to produce an output signal; And
One coefficient provides the unit, makes that as above-mentioned first coefficient N subharmonic distortion of above-mentioned electronic system is eliminated effectively in order to select one from a plurality of adjustment factors, and wherein above-mentioned coefficient provides the unit to comprise:
One digital signal processing module, it is connected with described harmonic wave elimination system, in order to a pending signal to be provided, cause above-mentioned signal processing system to export one the 3rd signal to above-mentioned harmonic wave and eliminate system, and above-mentioned a plurality of adjustment factors are provided seriatim to above-mentioned harmonic wave eliminate system, make above-mentioned harmonic wave eliminate system, produce a plurality of respective signal according to above-mentioned the 3rd signal and above-mentioned a plurality of adjustment factor;
One digital analog converter, it is connected with described digital signal processing module, after above-mentioned pending conversion of signals is become an analog signal, exports above-mentioned signal processing system to; And
One analog-digital converter, it is connected with described signal processing system, export above-mentioned digital signal processing module in order to convert above-mentioned a plurality of respective signal to a plurality of digital signals, make above-mentioned digital signal processing module carry out the total harmonic distortion analysis to above-mentioned digital signal, find out a pairing adjustment factor of total harmonic distortion value minimum, as above-mentioned first coefficient.
8. a method of eliminating total harmonic distortion is characterized in that, comprising:
Couple a harmonic wave and eliminate system between a signal processing system and an input signal;
Above-mentioned input signal is carried out the Nth power computing, to produce one first signal;
With above-mentioned first signal times with first coefficient, to produce a secondary signal;
With above-mentioned secondary signal and above-mentioned input signal addition, export above-mentioned signal processing system to produce one the 3rd signal, make above-mentioned signal processing system export an output signal; And
From a plurality of adjustment factors, select one as above-mentioned first coefficient, make that the N subharmonic distortion of above-mentioned electronic system is eliminated effectively.
9. the method for elimination total harmonic distortion according to claim 8 is characterized in that, the step of selecting above-mentioned first coefficient comprises:
One pending signal is provided;
Above-mentioned pending conversion of signals is become an analog signal;
Above-mentioned a plurality of adjustment factors are provided seriatim to above-mentioned harmonic wave eliminate system, make above-mentioned harmonic wave eliminate system, produce corresponding a plurality of the 5th signals according to above-mentioned analog signal and a plurality of adjustment factor;
According to above-mentioned a plurality of the 5th signals, produce a plurality of respective signal;
Convert above-mentioned a plurality of respective signal to a plurality of digital signals;
Above-mentioned digital signal is carried out the total harmonic distortion analysis, find out a minimum total harmonic distortion value; And
By one that finds out in above-mentioned a plurality of adjustment factors corresponding to above-mentioned minimum total harmonic distortion value, as above-mentioned first coefficient.
10. a method of eliminating total harmonic distortion is characterized in that, comprising:
Couple a harmonic wave and eliminate an output of system's to a signal processing system, in order to receive one first signal;
Above-mentioned first signal is carried out the Nth power computing, to produce a secondary signal;
Above-mentioned secondary signal be multiply by first coefficient, to produce one the 3rd signal;
With above-mentioned first signal, the 3rd signal plus, producing an output signal, and
From a plurality of adjustment factors, select one as above-mentioned first coefficient, make that the N subharmonic distortion of above-mentioned electronic system is eliminated effectively.
11. the method for elimination total harmonic distortion according to claim 10 is characterized in that, selects the step of above-mentioned first coefficient to comprise:
One pending signal is provided;
Above-mentioned pending conversion of signals is become an analog signal;
According to above-mentioned analog signal, produce the 4th signal;
Above-mentioned a plurality of adjustment factors are provided seriatim to above-mentioned harmonic wave eliminate system, make above-mentioned harmonic wave eliminate system, produce a plurality of respective signal according to above-mentioned the 4th signal and above-mentioned a plurality of adjustment factor;
Convert above-mentioned a plurality of respective signal to a plurality of digital signals;
Above-mentioned digital signal is carried out the total harmonic distortion analysis, find out a minimum total harmonic distortion value; And
By one that finds out in above-mentioned a plurality of adjustment factors corresponding to above-mentioned minimum total harmonic distortion, as above-mentioned first coefficient.
12. a harmonic wave is eliminated system, couples the signal processing system in the electronic system, it is characterized in that, above-mentioned harmonic wave elimination system comprises:
One Nth power device is in order to carry out the Nth power computing with an input signal, to produce one first signal;
One multiplier, in order to above-mentioned first signal times with one first coefficient, to produce a secondary signal; And
One adder in order to above-mentioned secondary signal and above-mentioned input signal addition, exports above-mentioned signal processing system to produce one the 3rd signal, and the total harmonic distortion of above-mentioned electronic system is eliminated by above-mentioned first coefficient of control by wherein above-mentioned harmonic wave elimination system.
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| CN1175114A (en) * | 1992-11-16 | 1998-03-04 | 埃克西德电子国际公司 | Method for correcting harmonic distortion |
| CN1175824A (en) * | 1996-06-24 | 1998-03-11 | 现代电子产业株式会社 | Switched capacitor digital-analog converter with decreased harmonic distortion |
| CN1533665A (en) * | 2001-07-20 | 2004-09-29 | 皇家菲利浦电子有限公司 | Echo canceller having nonlinear echo suppressor for harmonics calculations |
| CN1957598A (en) * | 2004-05-20 | 2007-05-02 | 汤姆森特许公司 | Apparatus and method for canceling distortion |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1175114A (en) * | 1992-11-16 | 1998-03-04 | 埃克西德电子国际公司 | Method for correcting harmonic distortion |
| CN1175824A (en) * | 1996-06-24 | 1998-03-11 | 现代电子产业株式会社 | Switched capacitor digital-analog converter with decreased harmonic distortion |
| CN1533665A (en) * | 2001-07-20 | 2004-09-29 | 皇家菲利浦电子有限公司 | Echo canceller having nonlinear echo suppressor for harmonics calculations |
| CN1957598A (en) * | 2004-05-20 | 2007-05-02 | 汤姆森特许公司 | Apparatus and method for canceling distortion |
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