CN103905070B - Device for signalling and method, balanced compensated signal receiving device and method - Google Patents
Device for signalling and method, balanced compensated signal receiving device and method Download PDFInfo
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- CN103905070B CN103905070B CN201210584147.0A CN201210584147A CN103905070B CN 103905070 B CN103905070 B CN 103905070B CN 201210584147 A CN201210584147 A CN 201210584147A CN 103905070 B CN103905070 B CN 103905070B
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Abstract
The invention discloses a kind of device for signalling and method, balanced compensated signal receiving device and method, be used for producing one according to a pulse amplitude modulating signal and transmit signal. This device for signalling comprises: a filtering characteristic compensating circuit, is used for producing a compensating signal according to this pulse amplitude modulating signal and a filter function; One wave filter, couples this filtering characteristic compensating circuit, is used for filtering this compensating signal to produce a filtering signal according to aforementioned filter function; And an analog front circuit, be used for producing this transmission signal according to this filtering signal.
Description
Technical field
The invention relates to a kind of device for signalling and method thereof and a kind of signal receiving device and side thereofMethod, in particular to a kind of device for signalling compensating according to filtering characteristic and method and onePlant balanced compensated signal receiving device and method thereof.
Background technology
Because electronic product can produce electromagnetic radiation in the time operating, therefore may disturb the normal fortune of other deviceEven affect health, therefore majority state is all made specification for the electromagnetic radiation of electronic product,Bring harm to prevent electromagnetic interference (ElectromagneticInterference, EMI). In some fieldIn, especially strict for the specification of electromagnetic interference, for instance, for an automobile-used network communication device andSpeech, the frequency spectrum of its signal sending should concentrate on low frequency, to meet relevant vehicle electric magnetic disturbance specification,At present technology utilizes a low pass filter to filter the signal that above-mentioned automobile-used network communication device institute wish sends,With by the spectrum limitations of transmitted signal in a low frequency range, and then meet related specifications. But, to thisAutomobile-used network communication device, the spectrum concentration of transmitted signal also means signal transmission distance in low frequencyAnd the reduction of transmission quantity (Throughput), in view of this, how in the feelings that meet electromagnetic interference specificationUnder shape, avoid the loss of signal transmission to become the problem that the art personage institute wish solves.
Summary of the invention
In view of above-mentioned, an object of the present invention is to provide a kind of signal compensating according to filtering characteristicConveyer and method thereof and balanced compensated signal receiving device and method thereof, to solve prior artProblem.
Another object of the present invention is to provide a kind of signal compensating according to filtering characteristic to transmit dressPut and method and balanced compensated signal receiving device and method thereof, with in meeting electromagnetic interference specificationUnder prerequisite, avoid or reduce the loss of signal transmission distance and transmission quantity.
The present invention has disclosed a kind of device for signalling compensating according to filtering characteristic, is used for according to oneCarry out source signal and produce a transmission signal. According to one embodiment of the invention, this device for signalling comprises:One filtering characteristic compensating circuit, is used for carrying out source signal and a filter function produces a compensating signal according to this;One wave filter, couples this filtering characteristic compensating circuit, is used for according to this filter function, this compensating signal being enteredRow filtering is to produce a filtering signal; And an analog front circuit, be used for producing according to this filtering signalThis transmission signal.
According to one embodiment of the invention, aforementioned come source signal be a pulse amplitude modulating signal, and aforementionedFiltering characteristic compensating circuit comprises: a computing circuit, is used for according to this pulse amplitude modulating signal and anti-Feedback signal produces a computing signal; One level adjusting circuit, couples this computing circuit, is used for according to this fortuneCalculate signal and produce this compensating signal, wherein the signal level of this pulse amplitude modulating signal is in a signal electricityBetween the flat upper limit and a signal level lower limit, and this level adjusting circuit to higher than this signal level upper limit orCarry out level adjustment to produce this compensating signal lower than this computing signal of this signal level lower limit, make this benefitRepay the signal level of signal between this signal level upper limit and lower limit; And a feedback circuit, coupleThis level adjusting circuit, is used for processing this compensating signal to produce this feedback signal according to a feedback function,This feedback function is associated to this filter function.
According to one embodiment of the invention, the corresponding 2M+1 of the signal level of aforementioned pulse amplitude modulating signalOne of them of individual signal level, prescribes a time limit when this computing signal exceeds in this signal level, and this level is adjustedThe signal level that circuit downgrades this computing signal reaches the individual level of n × (2M+1) to produce this compensating signal, andWhen this computing signal lower than this signal level under in limited time, this level adjusting circuit increases the letter of this computing signalNumber level reaches that n × (2M+1) individual level is to produce this compensating signal, and said n and M are positive integer, andN variable.
The present invention has separately disclosed a kind of balanced compensated signal receiving device, is used for receiving a transmission signal.According to one embodiment of the invention, this signal receiving device comprises: an analog front circuit, is used for foundationThis transmission signal produces one and receives signal; And a level reflex circuit, be used for to higher than a signal levelThe upper limit or lower than this reception signal of a signal level lower limit maybe a derivative signal of this reception signal carry outLevel is adjusted, and to produce a PM signal, makes the signal level of this PM signal in this letterBetween number level upper limit and lower limit, wherein corresponding 2M+1 of the signal level of this pulse amplitude modulating signalOne of them of signal level, when this reception signal or derivative signal exceed in this signal level in limited time, shouldThe signal level that level reflex circuit downgrades this reception signal or derivative signal reaches n × (2M+1) individual level,And work as this reception signal or derivative signal lower than prescribing a time limit under this signal level, this level reflex circuit increases thisThe signal level that receives signal or derivative signal reaches n × (2M+1) individual level, and this n and M are positive integer,And n capable of regulating.
The present invention has also disclosed a kind of method of communicating signals compensating according to filtering characteristic, is used for foundationOne carrys out source signal produces a transmission signal, by a device for signalling compensating according to filtering characteristicRealize. According to one embodiment of the invention, this method of communicating signals comprises the following step: come according to thisSource signal and a filter function produce a compensating signal; According to this filter function, this compensating signal is filteredRipple is to produce a filtering signal; And produce this transmission signal according to this filtering signal.
The present invention discloses again a kind of balanced compensated signal acceptance method, is used for receiving a transmission signal, logicalCrossing a balanced compensated signal receiving device realizes. According to one embodiment of the invention, this signal receivesMethod comprises the following step: produce one according to this transmission signal and receive signal; When this reception signal or its spread outThe signal level of raw signal higher than in a signal level in limited time, downgrade this reception signal or this derivative signalSignal level reaches n × (2M+1) individual level, and to produce a PM signal, wherein this n and M arePositive integer, and n capable of regulating; And the signal level of working as this reception signal or this derivative signal is lower than a letterUnder number level, in limited time, the signal level that increases this reception signal or this derivative signal reaches n × (2M+1) individual electricityFlat, to produce this PM signal, wherein the signal level of this PM signal is in this signal electricityBetween the flat upper limit and lower limit.
About feature of the present invention, implementation and effect, hereby coordinate graphic do preferred embodiment describe in detail asUnder.
The disclosed apparatus and method of the present invention can for example, according to demand or an a predetermined specifications (electromagnetic interferenceSpecification) signal that tendency to develop is sent carries out filtering, makes the waveform of this signal and/or frequency spectrum meet this specification, withTime the impact that causes because of filtering in signal transmission end compensation accordingly, and connect in signal accordinglyThe impact that this compensation of receiving end balance causes. Thus, the present invention is able to meeting this demand or this is established rules in advanceUnder the prerequisite of model, avoid or reduce the loss of signal transmission distance and/or transmission quantity.
Brief description of the drawings
Fig. 1 is the showing an of embodiment of the device for signalling compensating according to filtering characteristic of the present inventionIntention.
Fig. 2 is the schematic diagram of an embodiment of the filtering characteristic compensating circuit of Fig. 1.
Fig. 3 is the schematic diagram of an embodiment of the feedback circuit of Fig. 2.
Fig. 4 is another embodiment of the device for signalling compensating according to filtering characteristic of the present inventionSchematic diagram.
Fig. 5 is the schematic diagram of an embodiment of balanced compensated signal receiving device of the present invention.
Fig. 6 is the stream of an embodiment of the method for communicating signals compensating according to filtering characteristic of the present inventionCheng Tu.
Fig. 7 is the flow chart of an embodiment of the step S610 of Fig. 6.
Fig. 8 is another embodiment of the method for communicating signals compensating according to filtering characteristic of the present inventionPart flow chart.
Fig. 9 is the flow chart of an embodiment of balanced compensated signal acceptance method of the present invention.
Wherein, description of reference numerals is as follows:
100 device for signalling
110 filtering characteristic compensating circuits
120 wave filters
130 analog front circuits
210 computing circuits
220 level adjusting circuits
230 feedback circuits
310 delay elements
320 multiplication element
330 adding elements
400 device for signalling
410 first switches
420 digital to analog converters
430 second switches
440 analog-to-digital converters
450 balanced devices
460 decision-making circuits
500 signal receiving devices
510 analog front circuits
520 level reflex circuits
A1, a2 ... ak coefficient
B1, b2 ... bk coefficient
S610 carrys out source signal according to one and a filter function produces a compensating signal
S620 carries out filtering to produce a filtering signal according to this filter function to this compensating signal
S630 produces this transmission signal according to this filtering signal
S710 produces a computing signal according to this pulse amplitude modulating signal and a feedback signal
S720 is to entering higher than this signal level upper limit or lower than this computing signal of this signal level lower limitLine level adjustment produces this compensating signal
S730 produces this feedback signal according to this compensating signal and this filter function
S810 produces a simulated training signal under a correction mode
S820 carries out filtering to produce an analog filtering training signal to this simulated training signal
S830 changes this analog filtering training signal to produce a digital filtering training signal
S840 produces an equalizing signal according to this digital filtering training signal and an error feedback signal
S850 produces this error feedback signal according to this pulse amplitude modulating signal and this equalizing signal
S860 upgrades at least one parameter according at least one equalizer coefficients after adjusting
S910 produces one according to this transmission signal and receives signal
S920 when this reception signal or a derivative signal higher than in a signal level in limited time, downgrade this receptionThe signal level of signal or this derivative signal
S930 when this reception signal or this derivative signal lower than under a signal level in limited time, increase this receptionThe signal level of signal or this derivative signal
Detailed description of the invention
The technical terms of following description is with reference to the idiom of the art, if this description is to portionPoint term is illustrated or defines, and the explanation of this part term is with the explanation of this description or be defined asAccurate. In addition, be embodied as under possible prerequisite, between the described object of this description or event relativelyRelation, connotation can comprise direct or indirect relation, and so-called " indirectly " refers to still intermediate between objectOr the existence of physical space, or between self-explanatory characters' part, still there is the existence in intermediate event or the time interval. Moreover, withLower content is about signal transmission and the reception technique of communication system, for the common technology in this area or formerReason, if do not relate to technical characterictic of the present invention, by it will not go into details. In addition, the shape of element in diagram,The sequence of steps of size, ratio and flow process etc. are only signal, have and conventionally know the knowledgeable for the artUnderstand use of the present invention, but not practical range of the present invention is limited.
In addition, below each embodiment of description there is respectively one or more technical characterictic, so this is notMeaning is used present inventor must implement all technical characterictics in arbitrary embodiment simultaneously, or only can separateImplement one or all technical characteristic in different embodiment. In other words, only may otherwise affect enforcementProperty, the art has knows that the knowledgeable can be according to disclosure of the present invention conventionally, and looks the demand of selfOr design specification, optionally implement technical characterictic part or all of in arbitrary embodiment, or selectThe combination of technical characterictic part or all of in multiple embodiment is implemented on property ground, increases the invention process with thisTime elasticity.
Disclosure of the present invention comprise a kind of device for signalling compensating according to filtering characteristic andIts method and a kind of balanced compensated signal receiving device and method thereof, described multiple device and methods can be complied withIt is right for example, to come according to a specification (electromagnetic interference (ElectromagneticInterference, an EMI) specification)The signal that tendency to develop is sent carries out filtering, and compensates the impact that this filtering operation causes in transmission end accordinglyAnd the impact causing in this compensation of receiving terminal balance. Note that and be embodied as under possible prerequisite,The art have conventionally know the knowledgeable can according to disclosure of the present invention select equivalent element orStep realizes the present invention, is also that enforcement of the present invention is not limited to the disclosed embodiment of the present invention.Arbitrary list of the part or all of element comprising due to signal transmission of the present invention and receiving system in addition,Solely can be known element, therefore, in the abundant exposure and the exploitativeness that do not affect this device inventionPrerequisite under, below explanation will give memorandum for the details of indivedual elements of realizing the invention of this device. AgainPerson, signal transmission of the present invention and method of reseptance can be realized by device of the present invention, also may pass throughOther signal transmission and receiving system are realized, therefore do not affect the method invention abundant exposure and canUnder the prerequisite of implementation, the explanation of following methods invention will focus on method itself but not hardware unit carefullyJoint.
Refer to Fig. 1, its for the device for signalling compensating according to filtering characteristic of the present invention oneThe schematic diagram of embodiment. The present embodiment can be used for a communication device, and (for example one meets 10GBase-T specificationEthernet communication device), the waveform and the frequency spectrum that are particularly useful for a pair of signal transmission are strictly regulatedCommunication device. As shown in Figure 1, the device for signalling 100 of the present embodiment comprises: a filtering characteristicCompensating circuit 110, is used for carrying out source signal and a filter function produces a compensating signal, this enforcement according to oneIn example, this filtering characteristic compensating circuit 110 comprises a Tang Linsen-former road precoder(Tomlinson-HarashimaPrecoder, THP), this carrys out source signal is a pulse amplitude modulation(PulseAmplitudeModulation, PAM) signal, but other can be used to realize this filtering characteristicThe hardware of compensating circuit 110 and can be the handled signal of the present invention and also must be adopted by the present invention; OneWave filter 120, couples this filtering characteristic compensating circuit 110, is used for according to this filter function to this compensationSignal carries out filtering processing, and to produce a filtering signal, in the present embodiment, this filter function is according to an electricityMagnetic disturbance specification (EMISpecification) sets, make thus this filtering signal have specific waveforms and/ or frequency spectrum and can meet this specification; And AFE(analog front end) (AnalogFrontEnd, an AFE) circuit 130,Couple this wave filter 120, be used for producing this transmission signal according to this filtering signal.
Refer to Fig. 2, the schematic diagram of an embodiment of the filtering characteristic compensating circuit 110 that it is Fig. 1.As shown in Figure 2, filtering characteristic compensating circuit 110 comprises: a computing circuit 210, is used for according to aforementionedCome source signal (being pulse amplitude modulating signal) and a feedback signal and produce a computing letter in the present embodimentNumber, in the present embodiment, this computing circuit 210 comprises a subtracter (not shown), is used for this pulseAmplitude modulation signal deducts this feedback signal to produce this computing signal, but the art has logicalOften know that the knowledgeable can and select the electricity with other operation effect depending on demand or specification according to exposure of the present inventionRoad; One level adjusting circuit 220, couples this computing circuit 210, is used for producing according to this computing signalThis compensating signal, wherein the signal level of this pulse amplitude modulating signal is in a signal level upper limit and oneBetween signal level lower limit, and this level adjusting circuit 220 is to higher than this signal level upper limit or lower than thisThis computing signal of signal level lower limit carries out level adjustment to produce this compensating signal, makes this compensating signalSignal level between this signal level upper limit and lower limit, or rather, this pulse amplitude modulationThe corresponding 2M+1(M of the signal level of signal is positive integer, for example 2) one of them of individual signal level,When computing signal exceeds in this signal level in limited time, this level adjusting circuit 220 downgrades this computing signalSignal level reaches the individual level of n × (2M+1) (n is positive integer and variable, for example 1) to produce this compensationSignal, and when computing signal is lower than prescribing a time limit under this signal level, this level adjusting circuit 220 increases this fortuneCalculate the signal level of signal and reach the individual level of n × (2M+1) to produce this compensating signal, in the present embodiment, shouldLevel adjusting circuit 220 is modulus processing (ModulusOperation) circuit, but other can be realThe circuit of the function of existing above-mentioned level adjustment also must be adopted by the present invention; And a feedback circuit 230,Couple this level adjusting circuit 220, be used for producing this feedback signal according to this compensating signal, this feedback electricityThe corresponding feedback function in road 230, this feedback function is associated to this filter function, and in the present embodiment, this is anti-Feedback function equals this filter function and subtracts 1, is equivalent under the hypothesis of compensating signal this two letter at computing signalThe relation of several can derive as shown in the formula:
S(D)×[1/E(D)]=S(D)-F(D){S(D)×[1/E(D)]}
∴F(D)=E(D)-1
Wherein S (D) represents pulse amplitude modulating signal; E (D) represents that filter function (is also that 1/E (D) represents filteringThe corresponding function of characteristic compensating circuit); S (D) × [1/E (D)] represents the output of filtering characteristic compensating circuitSignal; F (D) represents feedback function; And F (D) { S (D) × [1/E (D)] } represents feedback signal. ButAlthough the present embodiment adopts above-mentioned functional relation, this area has knows that the knowledgeable still can comply with of the present invention taking off conventionallyReveal and adjust this feedback circuit 230 to realize other functional relation depending on demand or specification.
From the above, an embodiment of this feedback circuit 230 as shown in Figure 3, comprises multiple delay elements310, multiple multiplication element 320 and multiple adding element 330, wherein often this multiplication element 320 by itThe signal times receiving with a coefficient after with output, multiple coefficients (a1, a2 ... ak-1, ak and b1,B2 ... bk-1, bk, wherein k is positive integer) determine the feedback function of feedback circuit 230 more to enter oneStep ground is said, can make this feedback function be associated to aforementioned filter function, in implementation by adjusting multiple coefficientsDue to filter function can by designer on demand or specification decide in its sole discretion, therefore multiple coefficients also can be by designingPerson determines based on this filter function. In the present embodiment, feedback function can represent by following formula:
F(D)=E(D)-1=(b1D+b2D2+…+bkDk)/(1-a1D-a2D2-…-akDk)
Wherein D representative is passed through the letter of two delay elements by signal, the D2 representative of a delay elementNumber, Dk representative is by the signal of k delay element.
Please continue to refer to Fig. 2, in the present embodiment, feedback function is only associated to filter function, as for otherThe effect (a for example channelling effect) that can affect transmission signal can be by the receiving terminal that receives this transmission signalBalanced device compensated. But in another embodiment of the present invention, this feedback function can be furtherBe associated to a channel estimation function (or other can affect the function of this transmission signal), this channel estimation letterNumber represents the impact of a channelling effect on this transmission signal, now these filtering characteristic compensating circuit 110 foundationsThis feedback function compensates the filtering characteristic of this wave filter 120 and the impact of this channelling effect to produce this compensationSignal, or rather, now this feedback function equals the synthetic of this filter function and channel estimation functionFunction subtracts 1.
Please again consult Fig. 1, the present embodiment can further comprise: a digital to analog converter (for exampleThe digital to analog converter 420 of Fig. 4), couple this filtering characteristic compensating circuit 110, be used for to thisCompensating signal carries out numeral to analog-converted, and by conversion after compensating signal export to wave filter 120 withCarry out subsequent treatment, now wave filter 120 is an analog filter. But, because analog filter canCan be subject to some factor (such as process drift, variations in temperature etc.) impact and produce characteristic deviation, therefore originallyInvention further proposes to proofread and correct the design of this characteristic deviation. Refer to Fig. 4, it is of the present invention according to filterThe schematic diagram of another embodiment of the device for signalling that wave property compensates, as shown in Figure 4, this realityExecute routine device for signalling 400 except the element shown in Fig. 1, further comprise: one first switch 410,Be used for this being carried out to source signal under a normal mode and this filtering characteristic compensating circuit 110 is electrically connected at oneRise, and under a correction mode, this is carried out to source signal and a digital to analog converter 420 is electrically connectedTogether; One digital to analog converter 420, couples this filtering characteristic compensating circuit 110, be used inUnder one normal mode, this compensating signal is carried out to numeral to analog-converted, and by defeated the compensating signal after conversionGo out to wave filter 120 to carry out the subsequent treatment as described in the embodiment of Fig. 1, in addition, in this straightening dieUnder formula, this digital to analog converter 420 receives this via this first switch 410 and carrys out source signal, and willIt is converted to a simulated training signal to export wave filter 120 to, and wave filter 120 is again according to this simulation instructionPractice signal and produce an analog filtering training signal; One second switch 430, being used for will under this normal modeThis wave filter 120 is electrically connected with this analog front circuit 130, and under this correction modeThis wave filter 120 and an analog-to-digital converter 440 are electrically connected; This simulation is to numeralConverter 440, is used for, under this correction mode, this analog filtering training signal is converted to a digital filteringTraining signal; One balanced device 450, be used under this correction mode according to this digital filtering training signal andOne error feedback signal produces an equalizing signal, and this balanced device 450 comprises at least one equalizer coefficients, shouldEqualizer coefficients is adjusted according to this error feedback signal; And a decision-making circuit 460, in this correctionUnder pattern, couple this balanced device 450 and couple this via this first switch 410 and carry out source signal, be used for foundationOne default algorithm (for example a lowest mean square root algorithm, a regular lowest mean square root algorithm orReturn least square algorithm) come source signal and equalizing signal to produce this error feedback signal with this,And upgrade at least one parameter of this filtering characteristic compensating circuit 110 according to this equalizer coefficients after adjusting(coefficient of the feedback circuit 230 of for example Fig. 3), compensates the characteristic deviation of this wave filter 120 by this,In the present embodiment, this decision-making circuit 460 also couples this first and second switch 410,430(does not show),To switch back this normal mode in completing this two switch 410,430 of timing control by this correction mode,Or carry out this two switch 410,430 of timing control in need and switch to this correction mode by this normal mode.Note that above-mentioned trimming process also can be considered the parameter association of filtering characteristic compensating circuit 110 to filteringThe filter function of device 120, even if also the parameter of filtering characteristic compensating circuit 110 fail in advance according to filteringFunction is determined, also can be associated to this filter function via this trimming process.
From the above, in the present embodiment, this balanced device 450 can comprise: a feed forward equalizer, is used for complying withProduce a feed forward equalization signal, this feed forward equalization according to this digital filtering training signal and this error feedback signalDevice comprises at least one feed forward equalizer coefficient, and this feed forward equalizer coefficient carries out according to this error feedback signalAdjust, the portfolio effect of feed forward equalizer can be represented with a feed forward equalization function A (D); And one is anti-Feedback balanced device, couples this feed forward equalizer, is used for according to this feed forward equalization signal and this error feedback signalProduce this equalizing signal, this feedback equalizer comprises at least one feedback equalizer coefficient, this feedback equalizerCoefficient is adjusted according to this error feedback signal, makes the portfolio effect of feedback equalizer can feed back with one equalWeighing apparatus function B (D) represents, wherein this at least one feed forward equalizer coefficient with this at least one feedback equalizer isNumber forms this equalizer coefficients, before this feed forward equalization function A (D) equals divided by feedback equalization function B (D)State filter function E (D).
Note that wave filter 120 is except realizing with aforesaid analog filter, also can numeral filterRipple device is realized, and for instance, the analog front circuit 130 of Fig. 1 can comprise: a numeral to simulation turnsParallel operation (not shown), couples this wave filter 120, is used for that this filtering signal is carried out to numeral to simulation and turnsChange, this analog front circuit 130 produces this transmission signal according to this filtering signal after changing, and now shouldWave filter 120 is a digital filter.
On the other hand, as shown in Figure 5, the present invention also discloses a kind of balanced compensated signal receiving device 500,The transmission signal of being exported to receive the device for signalling of Fig. 1 or Fig. 4. This signal receiving device 500Comprise: an analog front circuit 510, is used for transmitting signal according to one and produces a reception signal; And oneLevel reflex circuit 520, be used for to higher than a signal level upper limit or lower than a signal level lower limit shouldA reception signal maybe derivative signal of this reception signal carries out level adjustment, to produce a PM letterNumber, make the signal level of this PM signal between this signal level upper limit and lower limit, whereinThe corresponding 2M+1(M of the signal level of this pulse amplitude modulating signal is positive integer, for example 2) and individual signalOne of them of level, when this reception signal or derivative signal exceed in this signal level in limited time, this levelThe signal level that reflex circuit 520 downgrades this reception signal or derivative signal reaches n × (2M+1), and (n is for justInteger and variable, for example 1) individual level, and when this reception signal or derivative signal are lower than this signal electricityFlat lower prescribing a time limit, the signal level that this level reflex circuit 520 increases this reception signal or derivative signal reaches n× (2M+1) individual level. In the present embodiment, this level reflex circuit 520 is a modulus treatment circuit, soOther can be carried out the whole circuit of aforementioned electric Heibei provincial opera and also must be adopted by the present invention. In addition, the present embodiment can enterOne step comprises: a channel equalizer (not shown), couple this analog front circuit 510, and be used for foundationThis reception signal produces this derivative signal, to compensate the impact of a channelling effect on this transmission signal, due toThis channel equalizer belongs to separately the common knowledge of the art, therefore its specification specified is saved at thisSlightly.
Except aforementioned means embodiment, the present invention also proposes a kind of signal compensating according to filtering characteristicTransfer approach, the method can realize by the device for signalling of Fig. 1 or Fig. 4, also can pass through otherCan carry out the device of this method realizes. As shown in Figure 6, an embodiment of this method of communicating signals comprisesThe following step:
Step S610: foundation one carrys out source signal and a filter function produces a compensating signal;
Step S620: this compensating signal is carried out to filtering to produce a filtering signal according to this filter function;And
Step S630: produce this transmission signal according to this filtering signal.
In the present embodiment, above-mentioned come source signal be a pulse amplitude modulating signal, its signal level is in oneBetween the signal level upper limit and a signal level lower limit, and step S610 can comprise the following step (as Fig. 7Shown in):
Step S710: produce a computing signal according to this pulse amplitude modulating signal and a feedback signal;
Step S720: to higher than this signal level upper limit or lower than this computing signal of this signal level lower limitCarry out level adjustment to produce this compensating signal, make the signal level of this compensating signal in this signal levelBetween the upper limit and lower limit. Or rather, the corresponding 2M+1 of the signal level of this pulse amplitude modulating signalOne of them of (this M is positive integer, for example 2) individual signal level, when this computing signal exceeds this letterOn number level, in limited time, the signal level that this step downgrades this computing signal reaches n × (2M+1), and (this n is for justInteger, for example 1) individual level to be to produce this compensating signal, and when this computing signal is lower than this signal levelLower in limited time, the signal level that this step increases this computing signal reaches the individual level of n × (2M+1) to produce this benefitRepay signal; And
Step S730: produce this feedback signal according to this compensating signal and this filter function.
In addition, be the embodiment shown in corresponding diagram 4, method of communicating signals of the present invention is except the step of Fig. 6Can further comprise the following step (as shown in Figure 8) outward:
Step S810: under a correction mode, this pulse amplitude modulating signal is carried out to a numeral to simulation and turnChange, to produce a simulated training signal;
Step S820: under this correction mode, this simulated training signal is carried out to filtering to produce a simulationFiltering training signal;
Step S830: under this correction mode, this analog filtering training signal is carried out to one and simulate to numeral and turnChange, to produce a digital filtering training signal;
Step S840: under this correction mode according to this digital filtering training signal and an error feedback signalProduce an equalizing signal, the associated at least one equalizer coefficients of this equalizing signal, this equalizer coefficients is according to being somebody's turn to doError feedback signal is adjusted;
Step S850: produce according to this pulse amplitude modulating signal and this equalizing signal under this correction modeThis error feedback signal; And
Step S860: under this correction mode, be updated to according to this at least one equalizer coefficients after adjustingA few parameter, this at least one system of parameters produces the foundation of this compensating signal as step S610.
Note that because the art has and conventionally know that the knowledgeable can consult Fig. 1 to Fig. 4 and speaks on somebody's behalf mutuallyThe bright embodiment of the method for fully understanding Fig. 6 to Fig. 8, therefore, is not affecting described multiple method enforcementUnder the abundant exposure of example and the situation of exploitativeness, repetition and unnecessary explanation give memorandum at this.
In addition, the present invention also proposes a kind of balanced compensated signal acceptance method, is used for receiving a transmission letterNumber. One embodiment of this signal acceptance method can realize by the signal receiving device 500 shown in Fig. 5,Comprise the following step (as shown in Figure 9):
Step S910: transmit signal according to one and produce a reception signal;
Step S920: when this reception signal maybe a derivative signal of this reception signal higher than a signal level upper limitTime, the signal level that downgrades this reception signal or its derivative signal reaches n × (2M+1) individual level, to produceOne PM signal, wherein n and M are positive integer, and n capable of regulating; And
Step S930: when this reception signal or its derivative signal lower than a signal level under in limited time, increase thisThe signal level that receives signal or its derivative signal reaches n × (2M+1) individual level, to produce this PMSignal, wherein the signal level of this PM signal is between this signal level upper limit and lower limit.
Similarly, because having, the art conventionally knows that the knowledgeable can consult Fig. 5 and related description is filledPoint understand the embodiment of the method for Fig. 9, therefore, do not affect the method embodiment abundant exposure and can be realUnder the situation of the property executed, the explanation of redundancy will give memorandum. Unless so note that the step of Fig. 6 to Fig. 9In step, have and express order, otherwise there is no the restriction of execution sequence.
In sum, the disclosed apparatus and method of the present invention can be according to demand or a predetermined specifications (for exampleOne electromagnetic interference specification) signal that tendency to develop is sent carries out filtering, and the waveform of this signal and/or frequency spectrum are metThis specification, the impact simultaneously causing because of filtering in the compensation of signal transmission end accordingly, and correspondingThe impact that ground causes in this compensation of signal receiving end balance. Thus, the present invention is able to meeting this demandOr under the prerequisite of this predetermined specifications, avoid or reduce the loss of signal transmission distance and/or transmission quantity.
Although embodiments of the invention are described above, but described multiple embodiment is not used for limiting thisBright, the art have conventionally know the knowledgeable can according to of the present invention express or implicit content to the present inventionTechnical characterictic impose variation, all this kind changes all may belong to the patent protection model that the present invention looks forFarmland, in other words, the present invention's scope of patent protection must be as the criterion depending on the claims person of defining of this description.
Claims (24)
1. the device for signalling compensating according to filtering characteristic, is used for carrying out source signal according to one and producesRaw one transmits signal, comprises:
One filtering characteristic compensating circuit, is used for carrying out source signal and a filter function produces an indemnity letter according to thisNumber;
One wave filter, couples this filtering characteristic compensating circuit, is used for filtering this compensation according to this filter functionSignal is to produce a filtering signal; And
One analog front circuit, is used for producing this transmission signal according to this filtering signal.
2. the device for signalling compensating according to filtering characteristic as claimed in claim 1, wherein shouldFiltering characteristic compensating circuit comprises a Tang Linsen-former road precoder.
3. the device for signalling compensating according to filtering characteristic as claimed in claim 1, wherein shouldCarrying out source signal is a pulse amplitude modulating signal, and this filtering characteristic compensating circuit comprises:
One computing circuit, is used for producing a computing letter according to this pulse amplitude modulating signal and a feedback signalNumber;
One level adjusting circuit, couples this computing circuit, is used for producing this indemnity letter according to this computing signalNumber, wherein the signal level of this pulse amplitude modulating signal is in a signal level upper limit and a signal levelBetween lower limit, and this level adjusting circuit is to higher than this signal level upper limit or lower than this signal level lower limitThis computing signal carry out level adjustment to produce this compensating signal, make the signal level place of this compensating signalBetween this signal level upper limit and lower limit; And
One feedback circuit, couples this level adjusting circuit, is used for processing this indemnity letter according to a feedback functionNumber to produce this feedback signal, this feedback function is associated to this filter function.
4. the device for signalling compensating according to filtering characteristic as claimed in claim 3, wherein shouldComputing circuit deducts this feedback signal to produce this computing signal by this pulse amplitude modulating signal.
5. the device for signalling compensating according to filtering characteristic as claimed in claim 3, wherein shouldLevel adjusting circuit is a modulus treatment circuit.
6. the device for signalling compensating according to filtering characteristic as claimed in claim 3, wherein shouldOne of them of corresponding 2M+1 the signal level of signal level of pulse amplitude modulating signal, when this computingThe signal level of signal exceeds in this signal level in limited time, and this level adjusting circuit downgrades this computing signalSignal level reaches the individual level of n × (2M+1) to produce this compensating signal, and when the signal electricity of this computing signalFlat lower than prescribing a time limit under this signal level, the signal level that this level adjusting circuit increases this computing signal reaches n× (2M+1) individual level is to produce this compensating signal, and n and M are positive integer, n capable of regulating.
7. the device for signalling compensating according to filtering characteristic as claimed in claim 3, wherein shouldFeedback function equals this filter function and subtracts 1.
8. the device for signalling compensating according to filtering characteristic as claimed in claim 3, wherein shouldFeedback circuit comprises multiple delay elements, multiple multiplication element and multiple adding element, wherein each being somebody's turn to doThe signal times that multiplication element receives it with a coefficient after with output, multiple coefficients have determined feedback circuitFeedback function, even be associated to this filter function by adjusting this feedback function of the plurality of coefficient.
9. the device for signalling compensating according to filtering characteristic as claimed in claim 3, wherein shouldFeedback function is further associated to a channel estimation function, and this channel estimation function represents a channelling effect pairThe impact of this transmission signal, this filtering characteristic compensating circuit compensates the filter of this wave filter by this feedback functionThe impact of wave property and this channelling effect is to produce this compensating signal.
10. the device for signalling compensating according to filtering characteristic as claimed in claim 9, this is anti-The composite function that feedback function equals this filter function and channel estimation function subtracts 1.
11. device for signalling that compensate according to filtering characteristic as claimed in claim 1, it entersOne step comprises:
One digital to analog converter, couples this filtering characteristic compensating circuit, is used for this compensating signal to enterLine number word is to analog-converted, and exports this compensating signal after conversion to this wave filter,
Wherein this wave filter is an analog filter.
12. device for signalling that compensate according to filtering characteristic as claimed in claim 11, it entersOne step comprises:
One first switch, is used under a normal mode, this being come source signal and this filtering characteristic compensating circuitBe electrically connected, and this come to source signal and this digital to analog converter under a correction modeBe electrically connected, wherein under this correction mode, this digital to analog converter carrys out this source signal and turnsBe changed to a simulated training signal and exported to this wave filter, this wave filter is again according to this simulated training letterNumber produce an analog filtering training signal;
One second switch, is used under this normal mode, this wave filter and this analog front circuit electrically being connectedBe connected together, and under this correction mode, this wave filter and an analog-to-digital converter be electrically connectedTogether;
This analog-to-digital converter, is used under this correction mode this analog filtering training signal conversionIt is a digital filtering training signal;
One balanced device, couples this analog-to-digital converter, is used under this correction mode according to this numeralFiltering training signal and an error feedback signal produce an equalizing signal, and this balanced device comprises at least one equilibriumDevice coefficient, this at least one equalizer coefficients is adjusted according to this error feedback signal; And
One decision-making circuit, couples this balanced device and couple this via this first switch under this correction modeSource signal, is used for carrying out source signal according to this under this correction mode and this equalizing signal produces this error feedbackSignal, and upgrade this filtering characteristic compensating circuit at least according to this at least one equalizer coefficients after adjustingOne parameter, the characteristic deviation of proofreading and correct this wave filter with this.
13. device for signalling that compensate according to filtering characteristic as claimed in claim 12, should be certainlyDetermine circuit and also couple this first switch and this second switch, with in complete this first switch of timing control andThis second switch switches back this normal mode by this correction mode, or this two is opened to carry out timing control in needClose and switch to this correction mode by this normal mode.
14. device for signalling that compensate according to filtering characteristic as claimed in claim 12, whereinThis balanced device comprises:
One feed forward equalizer, is used for producing one according to this digital filtering training signal and this error feedback signalFeed forward equalization signal, this feed forward equalizer comprises at least one feed forward equalizer coefficient, and this at least one feedforward is equalWeighing apparatus coefficient is adjusted according to this error feedback signal; And
One feedback equalizer, couples this feed forward equalizer, is used for according to this feed forward equalization signal and this mistakeFeedback signal produces this equalizing signal, and this feedback equalizer comprises at least one feedback equalizer coefficient, and this extremelyA few feedback equalizer coefficient is adjusted according to this error feedback signal,
Wherein this at least one feed forward equalizer coefficient and this at least one feedback equalizer coefficient form this balanced deviceCoefficient.
15. device for signalling that compensate according to filtering characteristic as claimed in claim 14, whereinA feed forward equalization function representation for the portfolio effect of this feed forward equalizer, the portfolio effect of this feedback equalizerWith a feedback equalization function representation, and this feed forward equalization function equals this filter divided by this feedback equalization functionWave function.
16. device for signalling that compensate according to filtering characteristic as claimed in claim 1, whereinThis analog front circuit comprises:
One digital to analog converter, couples this wave filter, is used for this filtering signal to carry out numeral to mouldIntend conversion, this analog front circuit produces this transmission signal according to this filtering signal after changing,
Wherein this wave filter is a digital filter.
17. 1 kinds of balanced compensated signal receiving devices, are used for receiving a transmission signal, comprise:
One analog front circuit, is used for producing one according to this transmission signal and receives signal; And
One level reflex circuit, is used for to higher than a signal level upper limit or lower than a signal level lower limitA this reception signal maybe derivative signal of this reception signal carries out level adjustment, to produce a PM letterNumber, make the signal level of this PM signal between this signal level upper limit and lower limit,
Wherein one of them of corresponding 2M+1 the signal level of the signal level of this PM signal, whenThe signal level of this reception signal or this derivative signal is higher than prescribing a time limit in this signal level, and this level is replied electricityThe signal level that road downgrades this reception signal or this derivative signal reaches n × (2M+1) individual level, and connects when thisCollect mail number or the signal level of this derivative signal lower than under this signal level in limited time, this level reflex circuit is adjustedThe signal level that rises this reception signal or this derivative signal reaches n × (2M+1) individual level, and n and M are justInteger, n capable of regulating.
18. balanced compensated signal receiving devices as claimed in claim 17, wherein this level is replied electricityLu Weiyi modulus treatment circuit.
19. balanced compensated signal receiving devices as claimed in claim 17, it further comprises:
One channel equalizer, is used for compensating the impact of a channelling effect on this transmission signal, thus according to being somebody's turn to doReceive signal and produce this derivative signal.
20. 1 kinds of method of communicating signals that compensate according to filtering characteristic, are used for carrying out source signal according to oneProduce one and transmit signal, realize by a device for signalling compensating according to filtering characteristic, bagContain the following step:
Carry out source signal and a filter function produces a compensating signal according to this;
According to this filter function, this compensating signal is carried out to filtering to produce a filtering signal; And
Produce this transmission signal according to this filtering signal.
21. method of communicating signals that compensate according to filtering characteristic as claimed in claim 20, whereinThis carrys out source signal is a pulse amplitude modulating signal, and the signal level of this pulse amplitude modulating signal is in oneBetween the signal level upper limit and a signal level lower limit, and the step that produces this compensating signal comprises:
Produce a computing signal according to this pulse amplitude modulating signal and a feedback signal;
To carrying out level tune higher than this signal level upper limit or lower than this computing signal of this signal level lower limitWhole to produce this compensating signal, make the signal level of this compensating signal in this signal level upper limit and lower limitBetween; And
Produce this feedback signal according to this compensating signal and this filter function.
22. method of communicating signals that compensate according to filtering characteristic as claimed in claim 21, whereinOne of them of corresponding 2M+1 the signal level of signal level of this pulse amplitude modulating signal, and produceThe step of this compensating signal comprises:
Prescribe a time limit when this computing signal exceeds in this signal level, the signal level that downgrades this computing signal reaches n× (2M+1) individual level to be to produce this compensating signal; And
When this computing signal lower than this signal level under in limited time, the signal level that increases this computing signal reaches n× (2M+1) individual level to be to produce this compensating signal,
Wherein n and M are positive integer, n capable of regulating.
23. method of communicating signals that compensate according to filtering characteristic as claimed in claim 20, it entersOne step comprises:
Under a correction mode, this is carried out source signal and carries out a numeral to analog-converted, to produce a simulation instructionPractice signal;
Under this correction mode, this simulated training signal is carried out to filtering to produce an analog filtering training letterNumber;
Under this correction mode, this analog filtering training signal is carried out to one and simulate to digital translation, to produceOne digital filtering training signal;
Under this correction mode, produce an equilibrium according to this digital filtering training signal and an error feedback signalSignal, the associated at least one equalizer coefficients of this equalizing signal, this at least one equalizer coefficients is according to this mistakeFeedback signal is adjusted;
Under this correction mode, carry out source signal according to this and this equalizing signal produces this error feedback signal; WithAnd
Under this correction mode, upgrade at least one parameter according to this at least one equalizer coefficients after adjusting,This at least one parameter is as the foundation that produces this compensating signal.
24. 1 kinds of balanced compensated signal acceptance methods, are used for receiving a transmission signal, by a balanceThe signal receiving device of compensation is realized, and comprises the following step:
Produce one according to this transmission signal and receive signal;
When this reception signal maybe the signal level of a derivative signal of this reception signal higher than a signal level onIn limited time, the signal level that downgrades this reception signal or this derivative signal reaches n × (2M+1) individual level, to produceA raw PM signal, wherein n and M are positive integer, and n capable of regulating; And
When the signal level of this reception signal or this derivative signal lower than a signal level under in limited time, increase thisThe signal level that receives signal or this derivative signal reaches n × (2M+1) individual level, to produce this PMSignal,
Wherein the signal level of this PM signal is between this signal level upper limit and lower limit.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6262624B1 (en) * | 2000-05-19 | 2001-07-17 | Advanced Micro Devices, Inc. | Phase delay based filter transconductance (Gm/C) compensation circuit |
| CN1675837A (en) * | 2002-07-01 | 2005-09-28 | 索拉尔弗拉雷通讯公司 | Method and apparatus for channel equalization |
| CN101547011A (en) * | 2008-03-25 | 2009-09-30 | 瑞昱半导体股份有限公司 | Communication device with adjustable compensation filter and method thereof |
| CN101621285A (en) * | 2003-06-25 | 2010-01-06 | 美商内数位科技公司 | Digital high pass filter compensation module and wireless transmission/reception unit |
| CN102594750A (en) * | 2012-02-15 | 2012-07-18 | 福建星海通信科技有限公司 | Method for generating mid-band modulation signal |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2267914A3 (en) * | 2000-01-07 | 2012-09-26 | Aware, Inc. | Systems and methods for loop length and bridged tap length determination of a transmission line |
| US7515642B2 (en) * | 2004-08-25 | 2009-04-07 | Broadcom Corporation | LDPC (Low Density Parity Check) coded 128 DSQ (Double Square QAM) constellation modulation and associated labeling |
| US8195221B2 (en) * | 2008-06-30 | 2012-06-05 | Intel Corporation | Loop delay compensation for continuous time sigma delta analog to digital converter |
-
2012
- 2012-12-28 CN CN201210584147.0A patent/CN103905070B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6262624B1 (en) * | 2000-05-19 | 2001-07-17 | Advanced Micro Devices, Inc. | Phase delay based filter transconductance (Gm/C) compensation circuit |
| CN1675837A (en) * | 2002-07-01 | 2005-09-28 | 索拉尔弗拉雷通讯公司 | Method and apparatus for channel equalization |
| CN101621285A (en) * | 2003-06-25 | 2010-01-06 | 美商内数位科技公司 | Digital high pass filter compensation module and wireless transmission/reception unit |
| CN101547011A (en) * | 2008-03-25 | 2009-09-30 | 瑞昱半导体股份有限公司 | Communication device with adjustable compensation filter and method thereof |
| CN102594750A (en) * | 2012-02-15 | 2012-07-18 | 福建星海通信科技有限公司 | Method for generating mid-band modulation signal |
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