CN104852877B - Signal receiving device and its two benches adaptive equalization method - Google Patents
Signal receiving device and its two benches adaptive equalization method Download PDFInfo
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- CN104852877B CN104852877B CN201410053239.5A CN201410053239A CN104852877B CN 104852877 B CN104852877 B CN 104852877B CN 201410053239 A CN201410053239 A CN 201410053239A CN 104852877 B CN104852877 B CN 104852877B
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Abstract
The present invention provides a kind of signal receiving device, wherein including a balance module, a coarse adjustment module and a fine setting module.The balance module is to receive an input signal, and imposes an equilibrium treatment to the input signal according to a high isostatic strength, to produce a signal after equalization.The coarse adjustment module adjusts the high isostatic strength according to the signal after equalization, until the signal after equalization meets a preliminary condition of convergence.After signal meets the preliminary condition of convergence after the processing, the fine setting module adjusts the high isostatic strength according to the signal after equalization, until the high isostatic strength meets a final condition of convergence.
Description
Technical field
The present invention is related to the technology that balanced (equalization) program is imposed to signal.
Background technology
Balanced device (equalizer) is the necessary element in many communication system receiving terminals, to compensate or eliminate signal
Deformation/decay caused by undesirable passage factor in transmittance process.Have only and appropriate equilibrium treatment is imposed to input signal
(such as selecting appropriate high isostatic strength), receiving terminal could correctly be understood, with the data received.With by video electronics standard
Association (Video Electronics Standards Association, VESA) promote display port (DisplayPort,
DP) exemplified by video interface, just specification receiving terminal must reply (clock recovery) journey completing clock pulse in its specifications
Equilibrium treatment is carried out after sequence.
The working frequency of the display port video interface of early stage is relatively low (1.62 megahertzs or 2.7 megahertzs), and receiving terminal is generally only
Fixed high isostatic strength need to be used to make receiving terminal circuit normal operation.However, the work of the display port video interface of new edition
Working frequency is higher (5.4 megahertzs), and serious forgiveness is relatively low, under the efficiency that reception device is may result in using fixed high isostatic strength
Drop.
The content of the invention
The present invention proposes a kind of new signal receiving device and its two benches adaptive equalization method.According to the present invention's
In embodiment, select high isostatic strength program be divided into coarse adjustment and fine setting two stages, and two stages be each provided with it is different
The condition of convergence.In addition to according to input signal accommodation high isostatic strength, according to the signal receiving device of the present invention and
Weighing apparatus method can also be by the inspection of two adjusting stages, it is ensured that the high isostatic strength finally selected is converged in correct scope.
The application of idea of the invention is not limited to signal specific reception device, but can be widely implemented needs to adapt to various
The occasion of property equilibrium treatment, for example with display port (DP) video interface, high-resolution multimedia interface (high
Definition multimedia interface, HDMI), mobile high-res link (mobile high-definition
Link, MHL) interface, Serial Advanced Technology Attachment (serial advanced technology attachment, SATA) connect
The electronic system of the standards such as mouth, USB 3.0 (USB3.0) interface.
A specific embodiment according to the present invention is a kind of signal receiving device, wherein including a balance module, a coarse adjustment
Module and a fine setting module.The balance module is to receive an input signal, and according to a high isostatic strength to the input signal
An equilibrium treatment is imposed, to produce a signal after equalization.The coarse adjustment module adjusts the high isostatic strength according to the signal after equalization, directly
Meet a preliminary condition of convergence to the signal after equalization.After signal meets the preliminary condition of convergence after the processing, the fine setting mould
Root tuber adjusts the high isostatic strength according to the signal after equalization, until the high isostatic strength meets a final condition of convergence.
It is equal for a kind of two benches adaptability for being applied to a signal receiving device according to the another specific embodiment of the present invention
Weighing apparatus method.First, an input signal is subjected to an equilibrium treatment according to a high isostatic strength, to produce a signal after equalization.Then,
According to the signal after equalization, signal meets a preliminary condition of convergence after the high isostatic strength is adjusted until the processing.Treat the equilibrium
After signal meets the preliminary condition of convergence afterwards, the high isostatic strength is adjusted until that the equilibrium is strong again according to the signal after equalization
Degree meets a final condition of convergence.
Brief description of the drawings
For the above objects, features and advantages of the present invention can be become apparent, the tool below in conjunction with accompanying drawing to the present invention
Body embodiment elaborates, wherein：
Fig. 1 is the functional block diagram of the signal receiving device in one embodiment of the invention.
The embodiment for including symbol count unit according to the coarse adjustment module of the present invention is presented in Fig. 2.
Fig. 3 is presented implements example in detail according to one kind of the fine setting module of the present invention.
The signal waveform example for the serial data that two kinds of contents are 0010 is presented in Fig. 4 A and Fig. 4 B.
A high isostatic strength and the relativeness example of time is presented in Fig. 4 C.
Fig. 5 is presented in the example further notified in the signal receiving device according to the present invention using phase stabilization.
The example for further coordinating clock generating circuit according to the signal receiving device of the present invention is presented in Fig. 6.
Fig. 7 is presented further matches somebody with somebody unification control module set the model of test according to the signal receiving device of the present invention
Example.
Fig. 8 is the flow chart of the two benches adaptive equalization method in one embodiment of the invention.
A kind of local flow example in the adaptive equalization method according to the present invention is presented in Fig. 9 A and Fig. 9 B respectively.
Component label instructions in figure：
100：Signal receiving device 11A：Sampling module
11B：Phase adjusting module 12：Balance module
13A：Local oscillations source 13B：Clock signal generation module
14：Coarse adjustment module 14A：Symbol count unit
15：Control module 16：Finely tune module
16A：Search unit 16B：Condition adjudgement unit
16C：Intensity adjustment unit 18：Multiplexer
19：Clock pulse data recovery module S82~S88：Process step
I0~I3, Q0~Q2：Sample point S901~S903：Process step
S911~S920：Process step
Embodiment
A specific embodiment according to the present invention is a kind of signal receiving device, and its functional block diagram is illustrated in Fig. 1.This reality
Apply the signal receiving device 100 in example and include a balance module 12, a coarse adjustment module 14, one fine setting module 16, a multiplexer 18
With a period of time arteries and veins data recovery module 19.Balance module 12 is to receive an input signal, and it is balanced that one is imposed to the input signal
Processing, to produce a signal after equalization.The high isostatic strength of the equilibrium treatment can be set to an initial value first.For example,
The high isostatic strength of the equilibrium treatment has 32 grades and is represented as 0~grade of grade 31, then the initial value can be but be not limited to
Grade 0.In other words, balance module 12 at the beginning when be with the initial equalization intensity perform equilibrium treatment.
As shown in figure 1, the signal after equalization that balance module 12 exports is passed to clock pulse data recovery module 19, one is produced
Data-signal after reply.Multiplexer 18, which is initialised, to be set as selecting the input that coarse adjustment module 14 is connected to balance module 12
End；The input to receive adjustment balance module 12 high isostatic strength control signal.After coarse adjustment module 14 receives the reply
Data-signal, and a coarse adjustment control signal is produced accordingly.More particularly, coarse adjustment module 14 can be according to data-signal after the reply
The high isostatic strength that adjustment balance module 12 uses, data-signal meets a preliminary condition of convergence after the reply.For example,
Coarse adjustment module 14 is first against the initial equalization intensity, and whether data-signal meets preliminary convergence after judging its corresponding reply
Condition.If it is not, coarse adjustment module 14, which can pass through the coarse adjustment control signal, changes the high isostatic strength of balance module 12 (such as from grade 0
Increase as grade 3), and whether judgement meets preliminary convergence corresponding to data-signal after the reply of the high isostatic strength of grade 3 again
Condition.After data-signal meets the preliminary condition of convergence after coarse adjustment module 14 judges the reply corresponding to some high isostatic strength, slightly
Mode transfer block 14 will stop adjusting the high isostatic strength, and send a tentatively convergence notice to multiplexer 18, and multiplexer 18 is changed
It is set as connection fine setting module 16 and balance module 12.
In practice, the knots modification that coarse adjustment module 14 updates high isostatic strength every time is not limited with particular size, can be set by circuit
Meter person or user decide in its sole discretion.For example, high isostatic strength can be made gradually to change according to following order：Grade 0, grade 3, grade
6th ..., grade 30, grade 0, grade 3 ....In addition, circuit designers, which also can be this coarse tuning stage, sets the upper and lower of high isostatic strength
Limit, such as make high isostatic strength gradually change according to following order：Grade 10, grade 13, grade 16, grade 19, grade 22, grade
25th, grade 22, grade 19, grade 16, grade 13, grade 10 ....
In practical application, the above-mentioned preliminary condition of convergence can be with more than one；Coarse adjustment module may wait for several preliminary convergences
After condition all meets, originate and give the preliminary convergence notice.In an embodiment, coarse adjustment module 14 produces and analyzes data after reply
The eye pattern (eye diagram) of signal, and whether the preliminary condition of convergence is higher than a threshold value for the expansion degree of eye pattern.It must say
Bright, the producing method and analysis mode of eye pattern are known to persons of ordinary skill in the technical field of the present invention, in this not
Repeat.
In another embodiment, the preliminary condition of convergence is the known special symbol included in data-signal after the reply
Quantity whether be higher than a quantity threshold value.As shown in Fig. 2 coarse adjustment module 14 can include a symbol count unit 14A, to search
Multiple aiming symbols in data-signal after the reply are sought, and it is total in what is occurred in certain section of special time to add up this kind of aiming symbol
Quantity.By taking display port (DP) interface as an example, before formally transmission video data, transmission end can first provide a training sequence
(training sequence) gives receiving terminal, and the content of the training sequence includes multiple K28.5 Bit Strings.It is equal for some
Weigh intensity, and symbol count unit 14A can be in data-signal after search in certain time and its accumulative corresponding reply
K28.5 Bit String total quantitys.If symbol count unit 14A accumulated result is higher than above-mentioned quantity threshold value (such as 500), coarse adjustment
Module 14 will judge that data-signal has met the preliminary condition of convergence after replying.If on the contrary, corresponding to some high isostatic strength
Accumulated result does not reach quantity threshold value, and coarse adjustment module 14 can change high isostatic strength, and begins search for again, accumulative target symbol
Number.Meet this preliminary condition of convergence and represent that current high isostatic strength has made the substantially correct interpretation signal content of subsequent conditioning circuit enough.
It should be noted that above-mentioned aiming symbol is not limited to K28.5 Bit Strings, but can be by circuit designers voluntarily according to reality
The specification of border application scenario selects.For example, provided that to meet high-res more to the input signal of balance module 12
Media interface (HDMI) specification or mobile high-res link (MHL) interface specification, and its content is free of training sequence, and symbol meter
The aiming symbol that counting unit 14A is searched can be contained in it is multiple known in a masking section (blanking interval)
Specific control word (control word).
As shown in figure 1, fine setting module 16 can also receive data-signal after the reply, and vernier control letter is produced accordingly
Number.Treat that multiplexer 18 is changed by the preliminary convergence notice that coarse adjustment module 14 is sent and be set as connection fine setting module 16 and balance module 12
Afterwards, be by fine setting module 16 through the vernier control signal adjustment balance module 12 used by high isostatic strength, until this is equal
Weighing apparatus intensity meets a final condition of convergence.One kind that fine setting module 16 is presented in Fig. 3 implements example in detail.Fine setting mould in this example
Block 16 includes one and searches unit 16A, a condition adjudgement unit 16B and an intensity adjustment unit 16C, and details are as follows.
Search unit 16A and meet the more of a target pattern (pattern) to be hunted out from data-signal after the reply
Pen data string.For example, the target pattern may be AABA, that is, the data that search signal content is 1101 or 0010
String.The signal waveform example for the serial data that two kinds of contents are 0010 is presented in Fig. 4 A and Fig. 4 B；Bold portion therein represents actual
Waveform, and dotted portion represents and noise jamming is not affected by ideal, without decay, undeformed waveform.Sample point I0~I3 is big
The center corresponding to each data bit is caused, and sample point Q0~Q2 corresponds roughly to the intersection of data bit two-by-two.
In the case of Fig. 4 A are illustrated, sample point I0, Q0, I1, Q1, I2, Q2, I3 sampling result are sequentially 0,0,0,0,1,0,0.By
It is 0,0,1,0 in sample point I0~I3 sampling result, searching unit 16A can judge that occurring one herein meets target pattern
Serial data.Similarly, in the case of Fig. 4 B are illustrated, sample point I0, Q0, I1, Q1, I2, Q2, I3 sampling result are sequentially
0、0、0、1、1、1、0.Because sample point I0~I3 sampling result is equally 0,0,1,0, searches unit 16A and also can determine that herein
There is a serial data for meeting target pattern.
It should be noted that target pattern is to be designed to programmable used by searching unit 16A, and according to reality
The specification of application scenario is selectively adjusted, and is not limited with above-mentioned AABA.
Whether the serial data that condition adjudgement unit 16B is responsible for judging each pen respectively having target pattern is in an overbalance
State or a balanced insufficient state.For the situation that Fig. 4 A are illustrated, due to sample point Q1, Q2 of sample point I2 both sides sampling
As a result all it is 0, condition adjudgement unit 16B can determine that this is the state of a high isostatic strength deficiency, so that actual waveform is less than
Ideal waveform, high isostatic strength should be heightened.For the situation that Fig. 4 B are illustrated, due to sample point Q1, Q2 of sample point I2 both sides
Sampling result be all 1, condition adjudgement unit 16B can determine that this is the too high state of a high isostatic strength, so that actual ripple
Shape is more than ideal waveform, should turn down high isostatic strength.Relatively, in both the above situation, if sample point Q1, Q2 sampling knot
Fruit is respectively 0,1, or respectively 1,0, then need not adjust high isostatic strength.
Then, intensity adjustment unit 16C is responsible for the judged result according to condition adjudgement unit 16B, and optionally adjustment is equal
High isostatic strength used in the module 12 that weighs.For example, intensity adjustment unit 16C can count overbalance within certain a period of time
The number that state and balanced insufficient state each occur.The number that balanced insufficient state is subtracted when the number of excessive equilibrium state is high
In a divergence threshold value, intensity adjustment unit 16C just reduces high isostatic strength used in balance module 12 (such as from grade 16
Come down to grade 15).Relatively, the number for overbalance state being subtracted when the number of balanced insufficient state is higher than divergence threshold
High isostatic strength used in balance module 12 is just improved and (such as increased from grade 16 as grade by value, intensity adjustment unit 16C
17).If the difference of the number of overbalance state and the number of balanced insufficient state is less than divergence threshold value, intensity adjustment is single
First 16C, which can determine that, need not adjust high isostatic strength used in balance module 12, that is, keep current high isostatic strength.
In an embodiment, after data-signal meets the preliminary condition of convergence after the reply (that is, multiplexer 18 changes
After connection fine setting module 16 and balance module 12), if high isostatic strength used in balance module 12 is in one section of special time
Variability be less than a variability threshold value, fine setting module 16 just judges that the high isostatic strength meets the final condition of convergence.In other words,
If in one section of special time, fine setting module 16 need not all change high isostatic strength used in balance module 12, represent mesh
Preceding high isostatic strength has considerable degree of correctness.The variability threshold value can be by circuit designers voluntarily according to actual need
Select, be not limited with special value.A high isostatic strength and the relativeness example of time is presented in Fig. 4 C.For example, if through
One section of special time is crossed, the amplitude of fluctuation for the high isostatic strength that balance module 12 uses is no more than preset range REQST, finely tune module
16 can determine that the high isostatic strength meets the final condition of convergence, and take the high isostatic strength average value in this time as final equilibrium
Intensity.
A kind of exemplary applications of signal receiving device 100 are presented in Fig. 5.In this example, the equilibrium of the output of balance module 12
Signal is provided to a sampling module 11A afterwards.Sampling result caused by sampling module 11A is passed to digital clock pulse data recovery
Module 19.In addition to data after reply, digital clock pulse data recovery module 19 is after also caused clock signal one is replied accordingly
Clock signal and a phase adjustment control code.After phase adjusting module 11B adjusts the reply according to the phase adjustment control code
After the phase of clock signal, sampling clock signal used in sampling module 11A is just produced.In practice, digital clock pulse data
Reply module 19 the phase adjustment control code can be produced according to the quality of data after reply, to make sampling module 11A produce compared with
Good sampling result.It should be noted that it is this hair according to the detailed embodiment of data generation phase adjustment control code after reply
Known to bright those of ordinary skill in the art, therefore repeat no more.As shown in figure 5, the phase adjustment control code
Fine setting module 16 can be provided to.Fine setting module 16 can judge whether the phase adjustment control code has tended towards stability, be no longer big
Amplitude variation moves.Until the phase adjustment control code points out that the sampling clock signal of phase adjusting module 11B outputs has met a phase
Stable condition, the intensity adjustment unit 16C in module 16 is finely tuned just referring initially to condition adjudgement unit 16B judged result.
Circuit framework in Fig. 5 is applied to produce the system of clock signal using digital clock pulse data recovery, such as high
Resolution multimedia interface (HDMI).Compared to simulation clock pulse data recovery, digital clock pulse data recovery needs longer time
Clock signal could be locked in ballpark phase, and then correctly sampling clock signal is provided.If in sampling clock pulse
Before signal stabilization, condition adjudgement unit 16B judged result (such as sample point I0~I3, Q0~Q2 sampling result) may have
Deviation, intensity adjustment unit 16C can be caused to do the judgement to make mistake.Add above-mentioned sampling clock signal and have to comply with phase stabilization
The threshold of condition, you can avoid the generation of relevant issues.
Another exemplary applications of signal receiving device 100 are presented in Fig. 6.As it was earlier mentioned, display port (DP) video connects
Mouthful specification receiving terminal must just proceed by equilibrium treatment after completing clock pulse and replying program.In this example, signal connects
Receiving apparatus 100 is with a unification local oscillations source 13A and clock pulse signal generator module 13B.Local oscillations source 13A, for example may be used
For an oscillator, a local oscillated signal is provided for.In typical circumstances, clock signal generation module 13B is to connect
A primary signal is received, and a clock pulse is imposed to the primary signal and replys program, to produce a clock signal.In order to avoid because of clock pulse
Signal generator module 13B slowly can not produce the clock signal of locking and be delayed follow-up signal processing routine, if the clock signal
Through being still introduced into a lock-out state after a period of time, clock signal generation module 13B can be a frequency synthesizer by reorganization state,
And the local oscillated signal for being changed to be exported according to local oscillations source 13A produces one and substitutes clock signal, (such as believes for subsequent conditioning circuit
Number reception device 100) use.
Another exemplary applications of signal receiving device 100 are presented in Fig. 7.Signal receiving device 100 in this example coordinates
One control module 15 operates, and is assisted from the preferably transmission setting of selection one in a variety of transmission settings.With display port
(DP) exemplified by video interface, its specification allows transmission end to believe before formally video data is sent using training sequence as test
Number, and the test result drawn according to receiving terminal judge transmission end when signal is sent should use any signal amplitude, which
It is ideal that kind strengthens (pre-emphasis) degree in advance.The conjunction of signal receiving device 100 described below and control module 15
Make mode.
First, after one first input signal sent by a transmission system according to the first transmission setting is received, mould is controlled
Block 15 control balance module 12 for first input signal carry out equilibrium treatment, and by coarse adjustment module 14 and fine setting module 16 according to
Sequence optionally adjusts its high isostatic strength, until fine setting module 16 judge impose on the first input signal high isostatic strength meet it is foregoing
The final condition of convergence.After module 16 to be fine tuned judges that the high isostatic strength for imposing on the first input signal meets the final condition of convergence, control
Molding block 15 will record one first signal quality corresponding to the first input signal.For example, first signal quality can
During for using the high isostatic strength for meeting the final condition of convergence, the expansion degree of the eye pattern of signal after equalization.In practice, first letter
Number quality can be supplied to control module 15 by coarse adjustment module 14 or fine setting module 16, also can be by control module 15 voluntarily according to equilibrium
The signal after equalization that module 12 exports produces.
Then, after one second input signal sent by same transmission system according to the second transmission setting is received, control
Module 15 controls balance module 12 to carry out equilibrium treatment for second input signal, and by coarse adjustment module 14 and fine setting module 16
Its high isostatic strength is sequentially optionally adjusted, until the high isostatic strength that fine setting module 16 judges to impose on the second input signal meets most
The whole condition of convergence.In practice, this first transmission setting with this second transmission setting can include different one in advance reinforcement degree and/
Or a different signal amplitudes, but be not limited with both settings.Module 16 to be fine tuned judges to impose on the equal of the second input signal
After weighing apparatus intensity meets the final condition of convergence, control module 15 will record the secondary signal product corresponding to the second input signal
Matter.Then, according to first signal quality and the secondary signal quality, control module 15 can determine to suggest that the transmission system uses
First transmission setting or the second transmission setting.Persond having ordinary knowledge in the technical field of the present invention is it is understood that signal receives
The transmission setting quantity that device 100 can be tested with control module 15 is not limited with two kinds；Circuit designers can be voluntarily according to reality
Border demand or the system specification determine testing time.
It is equal for a kind of two benches adaptability for being applied to a signal receiving device according to the another specific embodiment of the present invention
Weighing apparatus method, its flow chart are illustrated in Fig. 8.First, step S82 is one high isostatic strength initial value of setting.Then, step S84 is to connect
An input signal is received, and an equilibrium treatment is imposed to the input signal, to produce a signal after equalization.Should according to step S86
Signal after equalization adjusts a high isostatic strength of the equilibrium treatment, until the signal after equalization meets at the beginning of one caused by the equilibrium treatment
Walk the condition of convergence.Then, step S88 is after the signal after equalization meets the preparatory condition, again according to the signal after equalization
The high isostatic strength of the equilibrium treatment is adjusted, until the high isostatic strength meets a final condition of convergence.
The local flow example in the adaptive equalization method according to the present invention is presented in Fig. 9 A.Step S901 is to start from
Searched after one processing in signal (such as data-signal after a signal after equalization or a reply according to caused by the signal after equalization)
And the quantity (such as symbol count unit 14A be responsible for work) of accumulative aiming symbol.Step S902 is to judge aiming symbol
Whether it is higher than a quantity threshold value in the total quantity occurred in certain section of special time.If step S902 judged result is yes,
Course tuning procedure in this adaptive equalization method terminates.Relatively, if step S902 judged result is no, step S903 quilts
Perform, update the high isostatic strength that signal after the processing is subjected to.After step S903, step S901 and its subsequent step are weighed
It is new to perform.
Another local flow example in the adaptive equalization method according to the present invention is presented in Fig. 9 B.Step S911 can connect
Continue and carried out after course tuning procedure has been completed.Step S911 is to judge whether operate in numeral using the electronic system of this flow
Rapid pulse is according to (being, for example, a high-resolution multimedia interface) under reply framework.If step S911 judged result is yes, step
S912 is performed, that is, waits a sampling clock signal to meet a phase stabilization condition (such as the phase adjustment control in Waiting Graph 5
Code processed tends towards stability).If step S911 judged result is no, or after step S912 completions, step S913 is performed,
That is, start from signal after a processing (such as a signal after equalization or according to caused by the signal after equalization one reply after data believe
Number) in search with target pattern serial data, and judge each pen have target pattern serial data whether in one excessively
Weighing apparatus state or a balanced insufficient state (such as searching the work that unit 16A and condition adjudgement unit 16B is responsible for).Step S914
For in the number and the number of balanced insufficient state that add up overbalance state in one section of special time respectively.Step S915 is to sentence
Whether the number that the number of disconnected overbalance state subtracts balanced insufficient state is higher than a divergence threshold value.If step S915's sentences
Disconnected result be yes, then step S916 is performed, that is, reduces the high isostatic strength that signal after the processing is subjected to, and the flow time
To step S913.If if step S915 judged result is no, step S917 is performed, to judge time of balanced insufficient state
Whether the number that number subtracts overbalance state is higher than the divergence threshold value.If step S917 judged result is yes, step
S918 is performed, that is, improves the high isostatic strength that signal after the processing is subjected to, and the flow returns to step S913.If step
S917 judged result is no, then step S919 is performed, to judge whether high isostatic strength meets a final condition of convergence.If step
Rapid S919 judged result is no, and the flow returns to step S913.If step S919 judged result is yes, step S920 quilts
Perform, that is, determine a final high isostatic strength (such as the high isostatic strength met in this time of the final condition of convergence is averaged
Value).So far, EP (end of program) is finely tuned.
The ordinary technical staff in the technical field of the invention was it is understood that previously when introducing signal receiving device 100
The various operation changes of description can be also applied to the two benches adaptive equalization method in the flows such as Fig. 8, Fig. 9 A, Fig. 9 B, and its is thin
Section repeats no more.
As described above, the present invention proposes a kind of new signal receiving device and its two benches adaptive equalization method.In root
It is divided into coarse adjustment and two stages of fine setting according to the program in embodiments of the invention, selecting high isostatic strength, and two stages are each
Provided with the different conditions of convergence.In addition to according to input signal accommodation high isostatic strength, connect according to the signal of the present invention
Receiving apparatus and equalization methods can also be by the inspections of two adjusting stages, it is ensured that the high isostatic strength finally selected is to be converged in correctly
In the range of.
Although the present invention is disclosed as above with preferred embodiment, so it is not limited to the present invention, any this area skill
Art personnel, without departing from the spirit and scope of the present invention, when a little modification and perfect, therefore the protection model of the present invention can be made
Enclose to work as and be defined by what claims were defined.
Claims (15)
1. a kind of signal receiving device, comprising：
One balance module, to receive an input signal, and equilibrium treatment is imposed to the input signal according to a high isostatic strength, with
Produce a signal after equalization；
One coarse adjustment module, is coupled to the balance module, to adjust the high isostatic strength according to the signal after equalization, until the equilibrium
Signal meets a preliminary condition of convergence afterwards；The coarse adjustment module includes：One symbol count unit, to search in the signal after equalization
Multiple aiming symbols, and add up the plurality of aiming symbol total quantity；The preliminary condition of convergence, which includes, judges that the total quantity is
It is no to be higher than a quantity threshold value；It is the plurality of when the input signal meets a display port (DisplayPort, DP) interface specification
Aiming symbol is the multiple K28.5 Bit Strings being contained in a training sequence (training sequence), or when the input is believed
Number meet a high-resolution multimedia interface (high definition multimedia interface, HDMI) specification or one
Mobile high-res link (mobile high-definition link, MHL) interface specification, and the plurality of aiming symbol is bag
The multiple specific control words (control word) being contained in a masking section (blanking interval)；
One fine setting module, is coupled to the balance module, to after the signal after equalization meets the preliminary condition of convergence, the fine setting
Module adjusts the high isostatic strength according to the signal after equalization, until the high isostatic strength meets a final condition of convergence.
2. signal receiving device as claimed in claim 1, is also included：
A period of time arteries and veins data recovery module, after the signal after equalization is carried out into clock pulse data recovery processing, then provide thick to this
One of mode transfer block and the fine setting module.
3. signal receiving device as claimed in claim 1, it is characterised in that the coarse adjustment module includes：
One eye Diagram Analysis unit, to produce an eye pattern of the signal after equalization (eye diagram), and judge the one of the eye pattern
Expansion degree；Whether the preliminary condition of convergence includes judges the expansion degree higher than an expansion degree threshold value.
4. a kind of signal receiving device, comprising：
One balance module, to receive an input signal, and equilibrium treatment is imposed to the input signal according to a high isostatic strength, with
Produce a signal after equalization；
One coarse adjustment module, is coupled to the balance module, to adjust the high isostatic strength according to the signal after equalization, until the equilibrium
Signal meets a preliminary condition of convergence afterwards；And
One fine setting module, is coupled to the balance module, to after the signal after equalization meets the preliminary condition of convergence, the fine setting
Module adjusts the high isostatic strength according to the signal after equalization, until the high isostatic strength meets a final condition of convergence；Wherein this is micro-
Mode transfer block includes：
One searches unit, to search the more pen data strings for meeting a target pattern in the signal after equalization；
One condition adjudgement unit, to judge more pen data strings whether in an overbalance state or a balanced deficiency respectively
State；And
One intensity adjustment unit, to the judged result according to the condition adjudgement unit, optionally adjusts the equilibrium treatment
The high isostatic strength.
5. signal receiving device as claimed in claim 4, is further included：
One sampling module, to be sampled the signal after equalization according to a sampling clock signal, to produce a sampling result；
One digital clock pulse data recovery module, to according to the sampling result produce one reply after data-signal, one reply after when
Arteries and veins signal and a phase adjustment control code, wherein data-signal is the signal after equalization after the reply；And
One phase adjusting module, to adjust the phase of clock signal after the reply according to the phase adjustment control code, to produce
The sampling clock signal；
Wherein until the phase adjustment control code points out that the sampling clock signal has met a phase stabilization condition, intensity adjustment
Unit is just referring initially to the judged result of the condition adjudgement unit.
6. signal receiving device as claimed in claim 4, it is characterised in that treat that the signal after equalization meets the preliminary convergence bar
After part, if the high isostatic strength is less than a variability threshold value in the variability in one section of special time, the fine setting module judges should
High isostatic strength meets the final condition of convergence.
7. a kind of signal receiving device, comprising：
One balance module, to receive an input signal, and equilibrium treatment is imposed to the input signal according to a high isostatic strength, with
Produce a signal after equalization；
One coarse adjustment module, is coupled to the balance module, to adjust the high isostatic strength according to the signal after equalization, until the equilibrium
Signal meets a preliminary condition of convergence afterwards；
One fine setting module, is coupled to the balance module, to after the signal after equalization meets the preliminary condition of convergence, the fine setting
Module adjusts the high isostatic strength according to the signal after equalization, until the high isostatic strength meets a final condition of convergence；
One local oscillations source, to provide a local oscillated signal；And
One clock pulse signal generator module, to receive a primary signal, and a clock pulse is imposed to the primary signal and replys program, with
Produce a clock signal；If the clock signal, through being still introduced into a lock-out state after a period of time, the clock signal produces mould
Block is configured as a frequency synthesizer, and is changed to produce one according to the local oscillated signal and is substituted clock signal.
8. a kind of signal receiving device, comprising：
One balance module, to receive an input signal, and equilibrium treatment is imposed to the input signal according to a high isostatic strength, with
Produce a signal after equalization；
One coarse adjustment module, is coupled to the balance module, to adjust the high isostatic strength according to the signal after equalization, until the equilibrium
Signal meets a preliminary condition of convergence afterwards；
One fine setting module, is coupled to the balance module, to after the signal after equalization meets the preliminary condition of convergence, the fine setting
Module adjusts the high isostatic strength according to the signal after equalization, until the high isostatic strength meets a final condition of convergence；
One control module, to produce multiple signal qualities, multiple different transmission settings are respectively corresponding to, and according to the plurality of letter
Number quality determines the transmission setting of a transmission system；
The plurality of signal quality of each of which is that to control the balance module for an input signal to carry out this by the control module equal
Weighing apparatus processing, the high isostatic strength that the input signal is imposed on until fine setting module judgement meets the final condition of convergence, and records
It is corresponding to a transmission setting corresponding to a signal quality of the input signal；Transmission setting is strengthened in advance comprising different one
(pre-emphasis) degree and/or a different signal amplitudes.
9. a kind of two benches adaptive equalization method of signal receiving device, comprising：
(a) input signal is received, and an equilibrium treatment is imposed to the input signal according to a high isostatic strength, it is balanced to produce one
Signal afterwards；
(b) according to the signal after equalization coarse adjustment high isostatic strength, until the signal after equalization meets a preliminary condition of convergence；Wherein
Step (b) includes：Multiple aiming symbols in the signal after equalization are searched, and calculate the total quantity of the plurality of aiming symbol；Should
The preliminary condition of convergence, which includes, judges whether the total quantity is higher than a quantity threshold value；When the input signal meets a display port
(DP) interface specification, and the plurality of aiming symbol is multiple K28.5 Bit Strings for being contained in a training sequence or when the input
Signal meets high-resolution multimedia interface (HDMI) specification or a movement high-res link (MHL) interface specification, and this is more
Individual aiming symbol is the multiple specific control words being contained in a masking section；
(c) after the signal after equalization meets the preliminary condition of convergence, again according to the signal after equalization fine tuning high isostatic strength,
Until the high isostatic strength meets a final condition of convergence.
10. two benches adaptive equalization method as claimed in claim 9, it is characterised in that when the signal after equalization is subjected to
After the processing of arteries and veins data recovery, then it is used for step (b) and step (c).
11. two benches adaptive equalization method as claimed in claim 9, it is characterised in that step (b) includes：
An eye pattern of the signal after equalization is produced, and judges an expansion degree of the eye pattern；The preliminary condition of convergence, which includes, to be judged
Whether the expansion degree is higher than an expansion degree threshold value.
12. a kind of two benches adaptive equalization method of signal receiving device, comprising：
(a) input signal is received, and an equilibrium treatment is imposed to the input signal according to a high isostatic strength, it is balanced to produce one
Signal afterwards；
(b) according to the signal after equalization coarse adjustment high isostatic strength, until the signal after equalization meets a preliminary condition of convergence；And
(c) after the signal after equalization meets the preliminary condition of convergence, again according to the signal after equalization fine tuning high isostatic strength,
Until the high isostatic strength meets a final condition of convergence；Wherein step (c) includes：
(c1) the more pen data strings for meeting a target pattern are searched in the signal after equalization；
(c2) judge more pen data strings whether in an overbalance state or a balanced insufficient state respectively；And
(c3) according to step (c2) judged result, the high isostatic strength of the equilibrium treatment is optionally adjusted.
13. two benches adaptive equalization method as claimed in claim 12, is further included：
The signal after equalization is sampled according to a sampling clock signal, to produce a sampling result；
Clock signal and a phase adjustment control code after data-signal, one reply after being replied according to sampling result generation one, its
In after the reply data-signal be the signal after equalization；
The phase of clock signal after the reply is adjusted according to the phase adjustment control code, to produce the sampling clock signal；And
After the phase adjustment control code points out that the sampling clock signal has met a phase stabilization condition, just start to perform step
Suddenly (c3).
14. two benches adaptive equalization method as claimed in claim 12, it is characterised in that step (c) includes：
After signal meets the preliminary condition of convergence after the processing, if the high isostatic strength is small in the variability in one section of special time
In a variability threshold value, judge that the high isostatic strength meets the final condition of convergence.
15. a kind of two benches adaptive equalization method of signal receiving device, comprising：
(a1) local oscillated signal is provided；
(a2) primary signal is received, and a clock pulse is imposed to the primary signal and replys program, to produce a clock signal；And
If the clock signal is changed to impose the local oscillated signal one frequency through being still introduced into a lock-out state after a period of time
Rate synthesis program, clock signal is substituted to produce one；
(a3) input signal is received, and an equilibrium treatment is imposed to the input signal according to a high isostatic strength, it is equal to produce one
Signal after weighing apparatus；
(b) according to the signal after equalization coarse adjustment high isostatic strength, until the signal after equalization meets a preliminary condition of convergence；And
(c) after the signal after equalization meets the preliminary condition of convergence, again according to the signal after equalization fine tuning high isostatic strength,
Until the high isostatic strength meets a final condition of convergence.
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| US6522707B1 (en) * | 1999-04-30 | 2003-02-18 | Siemens Aktiengesellschaft | Method and device for disturbance suppression in a signal |
| US6546047B1 (en) * | 1998-10-08 | 2003-04-08 | Altima Communications, Inc. | Methods and circuits for optimal equalization |
| CN101931595A (en) * | 2010-08-06 | 2010-12-29 | 北京国科环宇空间技术有限公司 | Blind equalization method and blind equalization system |
| CN103166884A (en) * | 2011-12-16 | 2013-06-19 | 上海华虹集成电路有限责任公司 | Circuit for calculating frequency modulating signal receiving signal to noise ratio |
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| US6546047B1 (en) * | 1998-10-08 | 2003-04-08 | Altima Communications, Inc. | Methods and circuits for optimal equalization |
| US6522707B1 (en) * | 1999-04-30 | 2003-02-18 | Siemens Aktiengesellschaft | Method and device for disturbance suppression in a signal |
| CN101931595A (en) * | 2010-08-06 | 2010-12-29 | 北京国科环宇空间技术有限公司 | Blind equalization method and blind equalization system |
| CN103166884A (en) * | 2011-12-16 | 2013-06-19 | 上海华虹集成电路有限责任公司 | Circuit for calculating frequency modulating signal receiving signal to noise ratio |
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