CN106302281A - The adaptive equilibrium method of receiver and device - Google Patents
The adaptive equilibrium method of receiver and device Download PDFInfo
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- CN106302281A CN106302281A CN201610792087.XA CN201610792087A CN106302281A CN 106302281 A CN106302281 A CN 106302281A CN 201610792087 A CN201610792087 A CN 201610792087A CN 106302281 A CN106302281 A CN 106302281A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
- H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
- H04L25/03038—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a non-recursive structure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0264—Arrangements for coupling to transmission lines
- H04L25/0292—Arrangements specific to the receiver end
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- Dc Digital Transmission (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The invention discloses adaptive equilibrium method and the device of a kind of receiver.Wherein, the method includes: obtaining the pattern data of the clock data recovery circuit output of receiver, wherein, pattern data are obtained from extracting data to be received by clock data recovery circuit；Determining compensated information according to pattern data, wherein, compensated information is for being adjusted the linear equalizer of receiver；Adjust the high frequency compensation gain of linear equalizer according to compensated information, wherein, linear equalizer is used for compensating data to be received, the 1/4 of the speed with a width of data to be received that linear equalizer uses.The present invention solves due to the Dissipation change of the channel ropy technical problem of the more complicated receiving end signal caused.
Description
Technical field
The present invention relates to field of signal transmissions, in particular to adaptive equilibrium method and the device of a kind of receiver.
Background technology
In the application of HSSI High-Speed Serial Interface, due to dielectric loss and the Kelvin effect of channel so that receiving end signal
Quality receives serious impact.Prior art compensates channel to signal by the preemphasis of transmitting terminal and the equilibrium of receiving terminal
Low frequency and high frequency attenuation.Wherein, the preemphasis of transmitting terminal is a kind of method of priori, and it compensates letter below by predistortion
Decay in road；And the equilibrium of receiving terminal is a kind of posterior method, compensated accordingly by known signal attenuation.
Fig. 1 is the block diagram of the HSSI High-Speed Serial Interface receiving terminal circuit according to correlation technique, as it is shown in figure 1, use linear equal
Weighing apparatus and DFF compensate the channel decay for high speed signal, and high speed differential data is entered by linear equalizer
Enter DFF, when clock data recovery circuit resets, complete data receiver.Linear equalizer is actually one
Individual high pass filter, owing to channel presents low-pass characteristic for the decay of signal, can be good at so adding linear equalizer
Compensate the channel decay for high-frequency signal, thus after linear equalizer, obtain the signal of preferable eye diagram quality.
When signal rate is higher or the decay of channel is bigger, the compensation of linear equalizer receives a certain degree of limit
System, because linear equalizer is while compensating high frequency attenuation, is also exaggerated noise, if so only with linear equal
Weighing apparatus, often can not obtain good signal to noise ratio in clock data recovery circuit front end.Based on this reason, in this case
Further signal is equalized by inserting DFF, thus improve in clock data recovery circuit front end
Signal to noise ratio.
But when channel loss change is more complicated, prior art is owing to cannot adjust the height of linear equalizer dynamically
Frequently gain, thus the compensation ability of receiving terminal cannot be adjusted dynamically, the signal to noise ratio of clock data recovery circuit front end is relatively low, letter
Number second-rate, cause the clock data recovery circuit cannot good retimed data.
For above-mentioned problem, effective solution is the most not yet proposed.
Summary of the invention
Embodiments provide adaptive equilibrium method and the device of a kind of receiver, at least to solve due to channel
The Dissipation change ropy technical problem of the more complicated receiving end signal caused.
An aspect according to embodiments of the present invention, it is provided that the adaptive equilibrium method of a kind of receiver and device, bag
Include: obtaining the pattern data of the clock data recovery circuit output of described receiver, wherein, described pattern data are by described clock
Data recovery circuit obtains from extracting data to be received；Compensated information is determined according to described pattern data, wherein, described compensation
Information is for being adjusted the linear equalizer of described receiver；Described linear equalizer is adjusted according to described compensated information
High frequency compensation gain, wherein, described linear equalizer is for compensating described data to be received, and described linear equalizer is adopted
The speed with a width of described data to be received 1/4.
Further, determine that compensated information comprises determining that the edge sampling of described pattern data according to described pattern data
Information；Described compensated information is determined according to described pattern data and described edge sample information.
Further, determine that described compensated information includes according to described pattern data and described edge sample information: to institute
State pattern data and described edge sample information calculates according to the design conditions pre-set, export compensated information.
Further, described pattern data at least include: pattern 1:00001, pattern 2:11001, pattern 3:00110, code
Type 4:11110.
Further, determine that compensated information includes according to described pattern data: be described pattern 1 in described pattern data
Time, if described edge sample information is 0, the most described compensated information is high level, if described edge sample information is 1, then described
Compensated information is low level；When described pattern data are described pattern 2, if described edge sample information is 0, the most described compensation
Information is low level, if described edge sample information is 1, the most described compensated information is high level；It is institute in described pattern data
When stating pattern 3, if described edge sample information is 0, the most described compensated information is low level, if described edge sample information is 1,
The most described compensated information is high level；When described pattern data are described pattern 4, if described edge sample information is 0, then institute
Stating compensated information is low level, if described edge sample information is 1, the most described compensated information is high level；
Further, include according to the high frequency compensation gain of the described compensated information described linear equalizer of adjustment: to described
Compensated information carries out Accumulating generation self-adapting signal；Electric capacity big of described linear equalizer is adjusted by described self-adapting signal
Little, wherein, the feedback reception end of described linear equalizer receives described self-adapting signal.
Another aspect according to embodiments of the present invention, additionally provides a kind of adaptive equalization device, including: acquiring unit,
For obtaining the pattern data that the clock data recovery circuit of described receiver exports, wherein, described pattern data are by time described
Clock data recovery circuit obtains from extracting data to be received；Determine unit, determine compensated information according to described pattern data, its
In, described compensated information is for being adjusted the linear equalizer of described receiver；Adjustment unit, according to described compensated information
Adjusting the high frequency compensation gain of described linear equalizer, wherein, described linear equalizer is for carrying out described data to be received
Compensate, the 1/4 of the speed with a width of described data to be received that described linear equalizer uses.
Further, described determine that unit includes: first determines module, for determining the edge sampling of described pattern data
Information；Second determines module, for determining described compensated information according to described pattern data and described edge sample information.
Further, described second determines that module includes: calculating sub module, for described pattern data and described edge
Sample information calculates according to the design conditions pre-set, and exports compensated information.
Further, described pattern data at least include: pattern 1:00001, pattern 2:11001, pattern 3:00110, code
Type 4:11110.
Further, described determine that unit includes: the 3rd determines module, for being described pattern 1 in described pattern data
Time, if described edge sample information is 0, it is determined that described compensated information is high level, if described edge sample information is 1, then
Determine that described compensated information is low level；4th determines module, is used for when described pattern data are described pattern 2, if described
Edge sample information is 0, it is determined that described compensated information is low level, if described edge sample information is 1, it is determined that described benefit
The information of repaying is high level；5th determines module, for when described pattern data are described pattern 3, if the sampling of described edge is believed
Breath is 0, it is determined that described compensated information is low level, if described edge sample information is 1, it is determined that described compensated information is high
Level；6th determines module, for when described pattern data are described pattern 4, if described edge sample information is 0, the most really
Fixed described compensated information is low level, if described edge sample information is 1, it is determined that described compensated information is high level.
Further, described adjustment unit includes: generation module, adaptive for described compensated information is carried out Accumulating generation
Induction signal；Adjusting module, for adjusting the size of the electric capacity of described linear equalizer, wherein, institute by described self-adapting signal
The feedback reception end stating linear equalizer receives described self-adapting signal.
In embodiments of the present invention, use the pattern data of the clock data recovery circuit output obtaining receiver, according to
Pattern data determine compensated information, adjust the mode of the high frequency compensation gain of described linear equalizer according to compensated information, pass through
The high-frequency gain of self-adaptative adjustment linear equalizer, has reached to carry out signal receiving end the purpose of adaptive equalization, during raising
Clock data recovery circuit front end signal to noise ratio, and then solve due to the more complicated receiving end signal caused of the Dissipation change of channel
Ropy technical problem, has reached to improve the technique effect of receiving end signal quality.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this
Bright schematic description and description is used for explaining the present invention, is not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the block diagram of the HSSI High-Speed Serial Interface receiving terminal circuit according to correlation technique；
Fig. 2 is the flow chart of adaptive equilibrium method according to embodiments of the present invention；
Fig. 3 is the theory diagram of a kind of adaptive equilibrium method according to embodiments of the present invention；
Fig. 4 be previous code element according to embodiments of the present invention be eye pattern time " 1 "；
Fig. 5 be previous code element according to embodiments of the present invention be eye pattern time " 0 "；
Fig. 6 is the curve synoptic diagram judging compensated information according to single pattern according to embodiments of the present invention；
Fig. 7 is the curve synoptic diagram according to four kinds of pattern comprehensive descision compensated informations according to embodiments of the present invention；
Fig. 8 is integrator structure figure according to embodiments of the present invention；
Fig. 9 is the circuit diagram of the linear equalizer according to correlation technique；
Figure 10 is the schematic diagram of adaptive equalization device according to embodiments of the present invention；
Figure 11 is the schematic diagram of the structure of application self-adapting equalization methods according to embodiments of the present invention.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that the present invention program, below in conjunction with in the embodiment of the present invention
Accompanying drawing, is clearly and completely described the technical scheme in the embodiment of the present invention, it is clear that described embodiment is only
The embodiment of a present invention part rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under not making creative work premise, all should belong to the model of present invention protection
Enclose.
It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, "
Two " it is etc. for distinguishing similar object, without being used for describing specific order or precedence.Should be appreciated that so use
Data can exchange in the appropriate case, in order to embodiments of the invention described herein can with except here diagram or
Order beyond those described is implemented.Additionally, term " includes " and " having " and their any deformation, it is intended that cover
Cover non-exclusive comprising, such as, contain series of steps or the process of unit, method, system, product or equipment are not necessarily limited to
Those steps clearly listed or unit, but can include the most clearly listing or for these processes, method, product
Or intrinsic other step of equipment or unit.
According to embodiments of the present invention, it is provided that the embodiment of the method for a kind of adaptive equalization, it should be noted that at accompanying drawing
The step shown in flow chart can perform in the computer system of such as one group of computer executable instructions, and, although
Show logical order in flow charts, but in some cases, can with the order being different from herein perform shown or
The step described.
Fig. 2 is the flow chart of adaptive equilibrium method according to embodiments of the present invention, as in figure 2 it is shown, the method include as
Lower step:
Step S102, obtain receiver clock data recovery circuit output pattern data, wherein, pattern data by time
Clock data recovery circuit obtains from extracting data to be received；
Step S104, determines compensated information according to pattern data, and wherein, compensated information is for the linear equalization to receiver
Device is adjusted；
Step S106, adjusts the high frequency compensation gain of linear equalizer according to compensated information, and wherein, linear equalizer is used for
Data to be received are compensated, the 1/4 of the speed with a width of data to be received that linear equalizer uses.
Fig. 3 is the theory diagram of a kind of adaptive equilibrium method according to embodiments of the present invention, as it is shown on figure 3, high speed difference
Divided data passes sequentially through linear equalizer and DFF and obtains and compensate, finally by clock data recovery circuit, time
When differential data is reset by clock data recovery circuit, it is thus achieved that parallel data.In the embodiment of the present invention, linear equalizer uses
With the 1/4 of a width of data rate, and insert after linear equalizer based on advanced feedback (Look-Ahead) knot
The DFF of structure, realizes the equilibrium to high speed differential data further, and the data after equilibrium pass through clock data
Restoring circuit is retimed, and has obtained parallel data message.It is analyzed by the intersymbol interference that pseudo-random signal is produced
Understand, under certain decision feedback equalization coefficient condition, obtain clock data recovery circuit retime obtain and line number
According to, by wherein intersymbol interference detection pattern rising edge and the analysis of trailing edge, it can be determined that go out the compensation shape of current equalization
State is overcompensation or undercompensation, thus adjusts accordingly penalty coefficient, it is possible to the eye pattern optimizing receiving terminal improves reception
End signal quality.
In embodiments of the present invention, use the pattern data of the clock data recovery circuit output obtaining receiver, according to
Pattern data determine compensated information, adjust the mode of the high frequency compensation gain of linear equalizer according to compensated information, by adaptive
The high-frequency gain of linear equalizer should be adjusted, reached signal receiving end is carried out the purpose of adaptive equalization, thus when improving
Clock data recovery circuit front end signal to noise ratio, and then solve due to the more complicated receiving end signal caused of the Dissipation change of channel
Ropy technical problem, has reached to improve the technique effect of receiving end signal quality.
Alternatively, pattern data at least include: pattern 1:00001, pattern 2:11001, pattern 3:00110, pattern 4:
11110。
Fig. 4 is equivalent eye pattern when being " 1 " of the previous code element according to embodiments of the present invention, and Fig. 5 is real according to the present invention
Executing equivalent eye pattern when the previous code element of example is " 0 ", the embodiment of the present invention chooses pattern 1:00001, pattern 2:11001, code
Type 3:00110, pattern 4:11110 detects pattern as intersymbol interference, is carried out by the intersymbol interference producing pseudo-random signal
Analyze and understand, pattern 1:0011 can the R point rightmost intersymbol interference of rising edge in representative graph 5, pattern 2:11001 can represent
The R point leftmost intersymbol interference of rising edge in Fig. 5, pattern 3:00110 can be done by the intersymbol on the F point trailing edge left side in representative graph 4
Disturbing, pattern 4:11110 can intersymbol interference on the right of F point trailing edge in representative graph 4.By above-mentioned 4 kinds of patterns are detected and sentence
Disconnected, it may be determined that the compensation of current linear equalizer is undercompensation or overcompensation, thus the high frequency compensation to linear equalizer
Gain is adjusted, and obtains more preferable signal quality.
Fig. 6 is the curve synoptic diagram judging compensated information according to single pattern according to embodiments of the present invention, such as Fig. 6 institute
Show, judge the compensated information of linear equalizer according to single pattern, wherein, have the compensated information curve of two kinds of patterns for rising,
The compensated information curve of other two kinds of patterns, for declining, judges compensated information according to single pattern, and the compensation condition obtained is not
It it is optimum compensation condition.Fig. 7 is that the curve according to four kinds of pattern comprehensive descision compensated informations according to embodiments of the present invention shows
It is intended to, as shown in Figure 7, it can be seen that detect above-mentioned four kinds of patterns, puts down according to the compensated information that four kinds of detection patterns judge simultaneously
After all, tend towards stability, average after result be only the high-frequency gain of the linear equalizer after optimized offset optimizes and exist
Shake between two values.
Alternatively, determine that compensated information comprises determining that the edge sample information of pattern data according to pattern data；According to code
Type data and edge sample information determine compensated information.
In foregoing invention embodiment, first, data compensate through linear equalizer, the initial high frequency at linear equalizer
Under the conditions of obtain compensate, subsequently into DFF, the equal equalizer of decision-feedback again data are compensated, number
According to after overcompensation, by clock data recovery circuit, when data recovery circuit resets all the time, obtain parallel data,
Above-mentioned four kinds of pattern data are detected by parallel data, when getting above-mentioned four kinds of pattern data after any one, determine this
The edge sample information of pattern data, according to these pattern data and edge sample information thereof, it can be determined that current linear equalizer
Compensating coefficient be overcompensation or undercompensation, therefore, may determine that compensation according to these pattern data and edge sample information thereof
Information, is used for adjusting the high frequency compensation gain of linear equalizer.
Alternatively, determine that compensated information includes according to pattern data and edge sample information: pattern data and edge are adopted
Sample information calculates according to the design conditions pre-set, and exports compensated information.
Alternatively, determine that compensated information includes according to pattern data: when pattern data are pattern 1, if edge sampling letter
Breath is 0, then compensated information is high level, if edge sample information is 1, then compensated information is low level；It is code in pattern data
During type 2, if edge sample information is 0, then compensated information is low level, if edge sample information is 1, then compensated information is high electricity
Flat；When pattern data are pattern 3, if edge sample information is 0, then compensated information is low level, if edge sample information is
1, then compensated information is high level；When pattern data are pattern 4, if edge sample information is 0, then compensated information is low electricity
Flat, if edge sample information is 1, then compensated information is high level.
Four kinds of embodiment of the present invention detection patterns, the edge sample information of detection pattern and according to detection pattern and
The compensated information that edge sample information determines is as shown in following truth table:
It will be seen that when obtain pattern data, and according to obtain pattern data determine its edge sample information after, permissible
The compensating coefficient determining current linear equalizer is overcompensation or undercompensation, so determine compensated information up (rising) or
Person dn (declines), according to this compensated information, according to the design conditions pre-set, exports this compensated information, it may be assumed that compensated information is
Up (rises), exports high level；Compensated information is dn (decline), output low level.
Alternatively, include according to the high frequency compensation gain of compensated information adjustment linear equalizer: compensated information is tired out
Add generation self-adapting signal；By the size of the electric capacity of self-adapting signal adjustment linear equalizer, wherein, linear equalizer is anti-
Feedback receiving terminal receives self-adapting signal.
In embodiments of the present invention, after determining compensated information according to detection pattern and edge sample information thereof, will compensate
Information carries out Accumulating generation self-adapting signal, and wherein accumulation calculating can be completed by integrator, and Fig. 8 is to implement according to the present invention
The integrator structure schematic diagram of example, as shown in Figure 8, the compensated information input by integrator, it is input to integrator, integrator
The compensated information of input is added up with previous self-adapting signal, generates current self-adapting signal, and self adaptation is believed
Number output is to linear equalizer, and Fig. 9 is the circuit diagram of the linear equalizer according to correlation technique, as it is shown in figure 9, the most equal
Weighing apparatus includes electric capacity Cs, and the amount of capacity of electric capacity Cs determines the size of linear equalizer high frequency compensation gain, and self adaptation is believed
Number be input to linear equalizer, adjust the size of electric capacity Cs, and then adjust the size of linear equalizer high frequency compensation gain, change
The linear equalizer high frequency compensation to data to be received, improves the signal quality of clock recovery circuitry front end.Such as: linear equalization
The electric capacity Cs of device can be divided into 8 grades, and self-adapting signal can control electric capacity Cs and be at different gears wherein, 1 grade of capacitance
Minimum, 8 grades of capacitance maximums, and when capacitance minimum, the high-frequency gain of corresponding linear equalizer is minimum, capacitance is maximum
Time, the high-frequency gain of corresponding linear equalizer is maximum.Electric capacity acquiescence is initially set to 4 grades, and i.e. linear equalizer is initial high
Frequency compensates corresponding electric capacity Cs and is in 4 grades.After getting the pattern data obtained when clock data recovery circuit resets,
Determine its edge sample information according to pattern data, and determine compensated information, such as according to pattern data and edge sample information:
Determine that current compensated information is up (rising information), export high level, after high level is input to integrator, tire out through integrator
Add, by integrator output adaptive signal 1, control electric capacity Cs and be in 5 grades, make the high frequency compensation gain of linear equalizer increase,
Linear equalizer compensates compensation to data to be received under current high frequency compensation state, extensive by clock data through overcompensation
When compound circuit resets, again obtain parallel data, after determining its edge sample information according to the pattern data in parallel data, sentence
Break and the compensating coefficient of current linear equalizer, and export compensated information, if compensated information is up (rising information), then through long-pending
Divide the accumulation calculating of device, generate self-adapting signal 2, control electric capacity Cs and be in 6 grades；If compensation signal is dn (decline information), then
Through the accumulation calculating of integrator, generate self-adapting signal 0, control electric capacity Cs and be in 4 grades.
Another aspect according to embodiments of the present invention, it is provided that the device of a kind of adaptive equilibrium method, Figure 10 is root
According to the schematic diagram of the adaptive equalization device of the embodiment of the present invention, as shown in Figure 10, this device comprises:
Acquiring unit, for obtaining the pattern data of the clock data recovery circuit output of receiver, wherein, pattern data
Obtained from extracting data to be received by clock data recovery circuit；
Determining unit, determine compensated information according to pattern data, wherein, compensated information is for the linear equalization to receiver
Device is adjusted；
Adjustment unit, adjusts the high frequency compensation gain of linear equalizer according to compensated information, and wherein, linear equalizer is used for
Data to be received are compensated, the 1/4 of the speed with a width of data to be received that linear equalizer uses.
Fig. 3 is the theory diagram of a kind of adaptive equilibrium method according to embodiments of the present invention, as it is shown on figure 3, high speed difference
Divided data passes sequentially through linear equalizer and DFF and obtains and compensate, finally by clock data recovery circuit, time
When differential data is reset by clock data recovery circuit, it is thus achieved that parallel data.In the embodiment of the present invention, linear equalizer uses
With the 1/4 of a width of data rate, and insert after linear equalizer based on advanced feedback (Look-Ahead) knot
The DFF of structure, realizes the equilibrium to high speed differential data further, and the data after equilibrium pass through clock data
Restoring circuit is retimed, and has obtained parallel data message.It is analyzed by the intersymbol interference that pseudo-random signal is produced
Understand, under certain decision feedback equalization coefficient condition, obtain clock data recovery circuit retime obtain and line number
According to, by wherein intersymbol interference detection pattern rising edge and the analysis of trailing edge, it can be determined that go out the compensation shape of current equalization
State is overcompensation or undercompensation, thus adjusts accordingly penalty coefficient, it is possible to the eye pattern optimizing receiving terminal improves reception
End signal quality.
In embodiments of the present invention, use the pattern data of the clock data recovery circuit output obtaining receiver, according to
Pattern data determine compensated information, adjust the mode of the high frequency compensation gain of linear equalizer according to compensated information, by adaptive
The high-frequency gain of linear equalizer should be adjusted, reached signal receiving end is carried out the purpose of adaptive equalization, improve clock number
According to restoring circuit front end signal to noise ratio, and then solve the receiving end signal quality caused owing to the Dissipation change of channel is more complicated
The technical problem of difference, has reached to improve the technique effect of receiving end signal quality.
Alternatively, pattern data at least include: pattern 1:00001, pattern 2:11001, pattern 3:00110, pattern 4:
11110。
Fig. 4 is equivalent eye pattern when being " 1 " of the previous code element according to embodiments of the present invention, and Fig. 5 is real according to the present invention
Executing equivalent eye pattern when the previous code element of example is " 0 ", the embodiment of the present invention chooses pattern 1:00001, pattern 2:11001, code
Type 3:00110, pattern 4:11110 detects pattern as intersymbol interference, is carried out by the intersymbol interference producing pseudo-random signal
Analyze and understand, pattern 1:0011 can the R point rightmost intersymbol interference of rising edge in representative graph 5, pattern 2:11001 can represent
The R point leftmost intersymbol interference of rising edge in Fig. 5, pattern 3:00110 can be done by the intersymbol on the F point trailing edge left side in representative graph 4
Disturbing, pattern 4:11110 can intersymbol interference on the right of F point trailing edge in representative graph 4.By above-mentioned 4 kinds of patterns are detected and sentence
Disconnected, it may be determined that the compensation of current linear equalizer is undercompensation or overcompensation, thus the high frequency compensation to linear equalizer
Gain is adjusted, and obtains more preferable signal quality.
Alternatively, above-mentioned determine that unit includes: first determines module, for determining the edge sample information of pattern data；
Second determines module, for determining compensated information according to pattern data and edge sample information.
In foregoing invention embodiment, first, data compensate through linear equalizer, the initial high frequency at linear equalizer
Under the conditions of obtain compensate, subsequently into DFF, the equal equalizer of decision-feedback again data are compensated, number
According to after overcompensation, by clock data recovery circuit, when data recovery circuit resets all the time, obtain parallel data,
Above-mentioned four kinds of pattern data are detected by parallel data, when getting above-mentioned four kinds of pattern data after any one, determine this
The edge sample information of pattern data, according to these pattern data and edge sample information thereof, it can be determined that current linear equalizer
Compensating coefficient be overcompensation or undercompensation, therefore, may determine that compensation according to these pattern data and edge sample information thereof
Information, is used for adjusting the high frequency compensation gain of linear equalizer.
Alternatively, second determines that module includes: calculating sub module, for pattern data and edge sample information according in advance
The design conditions first arranged calculate, and export compensated information.
Optionally it is determined that unit includes: the 3rd determines module, for when pattern data are pattern 1, if edge sampling is believed
Breath is 0, it is determined that compensated information is high level, if edge sample information is 1, it is determined that compensated information is low level；4th is true
Cover half block, for when pattern data are pattern 2, if edge sample information is 0, it is determined that compensated information is low level, if limit
It is 1 along sample information, it is determined that compensated information is high level；5th determines module, is used for when pattern data are pattern 3, if
Edge sample information is 0, it is determined that compensated information is low level, if edge sample information is 1, it is determined that compensated information is high electricity
Flat；6th determines module, for when pattern data are pattern 4, if edge sample information is 0, it is determined that compensated information is low
Level, if edge sample information is 1, it is determined that compensated information is high level.
Four kinds of embodiment of the present invention detection patterns, the edge sample information of detection pattern and according to detection pattern and
The compensated information that edge sample information determines is as shown in following truth table:
It will be seen that when obtain pattern data, and according to obtain pattern data determine its edge sample information after, permissible
The compensating coefficient determining current linear equalizer is overcompensation or undercompensation, so determine compensated information dn (decline) or
Person up (rises), according to this compensated information, according to the design conditions pre-set, exports this compensated information, it may be assumed that compensated information is up
(rising), exports high level；Compensated information is dn (decline), output low level.
Alternatively, above-mentioned adjustment unit includes: generation module, for compensated information carries out Accumulating generation self adaptation letter
Number；Adjusting module, for being adjusted the size of electric capacity of linear equalizer by self-adapting signal, wherein, linear equalizer anti-
Feedback receiving terminal receives described self-adapting signal.
Figure 11 is the schematic diagram of application self-adapting equalization methods according to embodiments of the present invention, as shown in figure 11, above-mentioned
In inventive embodiments, first, data, when clock data recovery circuit resets, obtain parallel data, intersymbol interference detector
Obtain this parallel data, and in parallel data, detect above-mentioned 4 kinds of pattern data, according to the pattern data got, determine it
Edge sample information, determines compensated information according to pattern data and edge sample information thereof, is input to amass by compensated information subsequently
Divide device to carry out accumulation calculating, and output result is inputed to linear equalizer, for controlling the big of the electric capacity Cs of linear equalizer
Little, and then the high frequency compensation gain of adjustment linear equalizer, thus reached signal receiving end and carried out the purpose of adaptive equalization,
Solve due to the Dissipation change of the channel ropy technical problem of the more complicated receiving end signal caused.
In the above embodiment of the present invention, the description to each embodiment all emphasizes particularly on different fields, and does not has in certain embodiment
The part described in detail, may refer to the associated description of other embodiments.
In several embodiments provided herein, it should be understood that disclosed technology contents, can be passed through other
Mode realizes.Wherein, device embodiment described above is only schematically, the division of the most described unit, Ke Yiwei
A kind of logic function divides, actual can have when realizing other dividing mode, the most multiple unit or assembly can in conjunction with or
Person is desirably integrated into another system, or some features can be ignored, or does not performs.Another point, shown or discussed is mutual
Between coupling direct-coupling or communication connection can be the INDIRECT COUPLING by some interfaces, unit or module or communication link
Connect, can be being electrical or other form.
The described unit illustrated as separating component can be or may not be physically separate, shows as unit
The parts shown can be or may not be physical location, i.e. may be located at a place, or can also be distributed to multiple
On unit.Some or all of unit therein can be selected according to the actual needs to realize the purpose of the present embodiment scheme.
It addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, it is also possible to two or more unit are integrated in a unit.Above-mentioned integrated list
Unit both can realize to use the form of hardware, it would however also be possible to employ the form of SFU software functional unit realizes.
If described integrated unit realizes and as independent production marketing or use using the form of SFU software functional unit
Time, can be stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part that in other words prior art contributed or this technical scheme completely or partially can be with the form of software product
Embodying, this computer software product is stored in a storage medium, including some instructions with so that a computer
Equipment (can be for personal computer, server or the network equipment etc.) perform the whole of method described in each embodiment of the present invention or
Part steps.And aforesaid storage medium includes: USB flash disk, read only memory (ROM, Read-Only Memory), random access memory are deposited
Reservoir (RAM, Random Access Memory), portable hard drive, magnetic disc or CD etc. are various can store program code
Medium.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For Yuan, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (12)
1. the adaptive equilibrium method of a receiver, it is characterised in that including:
Obtaining the pattern data of the clock data recovery circuit output of described receiver, wherein, described pattern data are by time described
Clock data recovery circuit obtains from extracting data to be received；
Determining compensated information according to described pattern data, wherein, described compensated information is for the linear equalization to described receiver
Device is adjusted；
Adjust the high frequency compensation gain of described linear equalizer according to described compensated information, wherein, described linear equalizer is used for
Described data to be received are compensated, the 1/4 of the speed with a width of described data to be received that described linear equalizer uses.
Method the most according to claim 1, it is characterised in that determine that compensated information includes according to described pattern data:
Determine the edge sample information of described pattern data；
Described compensated information is determined according to described pattern data and described edge sample information.
Method the most according to claim 2, it is characterised in that true according to described pattern data and described edge sample information
Fixed described compensated information includes:
Calculating described pattern data and described edge sample information according to the design conditions pre-set, output compensates letter
Breath.
The most according to the method in any one of claims 1 to 3, it is characterised in that described pattern data at least include:
Pattern 1:00001, pattern 2:11001, pattern 3:00110, pattern 4:11110.
Method the most according to claim 4, it is characterised in that determine that compensated information includes according to described pattern data:
When described pattern data are described pattern 1, if described edge sample information is 0, the most described compensated information is high level,
If described edge sample information is 1, the most described compensated information is low level；
When described pattern data are described pattern 2, if described edge sample information is 0, the most described compensated information is low level,
If described edge sample information is 1, the most described compensated information is high level；
When described pattern data are described pattern 3, if described edge sample information is 0, the most described compensated information is low level,
If described edge sample information is 1, the most described compensated information is high level；
When described pattern data are described pattern 4, if described edge sample information is 0, the most described compensated information is low level,
If described edge sample information is 1, the most described compensated information is high level.
Method the most according to claim 1, it is characterised in that adjust described linear equalizer according to described compensated information
High frequency compensation gain includes:
Described compensated information is carried out Accumulating generation self-adapting signal；
By the size of the electric capacity of the described self-adapting signal described linear equalizer of adjustment, wherein, described linear equalizer is anti-
Feedback receiving terminal receives described self-adapting signal.
7. the adaptive equalization device of a receiver, it is characterised in that including:
Acquiring unit, for obtaining the pattern data of the clock data recovery circuit output of described receiver, wherein, described pattern
Data are obtained from extracting data to be received by described clock data recovery circuit；
Determining unit, determine compensated information according to described pattern data, wherein, described compensated information is for described receiver
Linear equalizer is adjusted；
Adjustment unit, adjusts the high frequency compensation gain of described linear equalizer according to described compensated information, wherein, described linear equal
Weighing apparatus is used for compensating described data to be received, the speed with a width of described data to be received that described linear equalizer uses
The 1/4 of rate.
Device the most according to claim 7, it is characterised in that described determine that unit includes:
First determines module, for determining the edge sample information of described pattern data；
Second determines module, for determining described compensated information according to described pattern data and described edge sample information.
Device the most according to claim 8, it is characterised in that described second determines that module includes:
Calculating sub module, for carrying out according to the design conditions pre-set described pattern data and described edge sample information
Calculate, export compensated information.
10. according to the device according to any one of claim 7 to 9, it is characterised in that described pattern data at least include:
Pattern 1:00001, pattern 2:11001, pattern 3:00110, pattern 4:11110.
11. devices according to claim 10, it is characterised in that described determine that unit includes:
3rd determines module, for when described pattern data are described pattern 1, if described edge sample information is 0, it is determined that
Described compensated information is high level, if described edge sample information is 1, it is determined that described compensated information is low level；
4th determines module, for when described pattern data are described pattern 2, if described edge sample information is 0, it is determined that
Described compensated information is low level, if described edge sample information is 1, it is determined that described compensated information is high level；
5th determines module, for when described pattern data are described pattern 3, if described edge sample information is 0, it is determined that
Described compensated information is low level, if described edge sample information is 1, it is determined that described compensated information is high level；
6th determines module, for when described pattern data are described pattern 4, if described edge sample information is 0, it is determined that
Described compensated information is low level, if described edge sample information is 1, it is determined that described compensated information is high level.
12. devices according to claim 7, it is characterised in that described adjustment unit includes:
Generation module, for carrying out Accumulating generation self-adapting signal to described compensated information；
Adjusting module, for adjusting the size of the electric capacity of described linear equalizer, wherein, described line by described self-adapting signal
Property equalizer feedback reception end receive described self-adapting signal.
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