CN105307245A - Signal sending method and signal sending device thereof - Google Patents
Signal sending method and signal sending device thereof Download PDFInfo
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- CN105307245A CN105307245A CN201410231291.5A CN201410231291A CN105307245A CN 105307245 A CN105307245 A CN 105307245A CN 201410231291 A CN201410231291 A CN 201410231291A CN 105307245 A CN105307245 A CN 105307245A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention provides a method for sending a signal to an external device. The method comprises the following steps: firstly, obtaining a compensation value of an equalizer, wherein the compensation value is used for compensating a signal from the external device; then, comparing the compensation value with a set of reference numerical values to obtain a parameter; and finally, adjusting the signal sent to the external device by an output unit according to the parameter.
Description
Technical field
The present invention relates to method and the device thereof of the transmission of a kind of signal, espespecially a kind of method and device thereof that automatically can adjust signal transmission according to the length of transmission line.
Background technology
The sequence link (SerialLink) of running gear often wishes reasonably to be controlled in power consumption (powerconsumption).In power consumption, consume comparatively large with transmitting device (transmitter), and the distance length of the power consumption of transmitting device and transmission line is closely bound up.In the design of sequence link, in order to the transmission line transmission line of 5 meters (such as 1 meter, 3 meters or) of different line-spacing can be supported, transmitting device is using the longest situation of transmission line line-spacing as consideration when designing, namely the amplitude of oscillation (swing) that transmitting device outputs signal is designed to the fixed value (as maximum) that can be used for nose distance, to make transmitting device energy Support Line apart from the longest transmission line.But running gear in use, usually be all use the transmission line of short distance to transmit, cause running gear in use, produce many unnecessary power consumptions (powerconsumption) and electromagnetic interference (ElectromagneticInterference is called for short EMI).
Summary of the invention
Main purpose of the present invention is to provide a kind of method sending signal, it can make electronic installation automatically adjust the amplitude of oscillation (or amplitude) and the low-and high-frequency energy difference distance of output signal according to the length of transmission line, to reduce the electromagnetic interference (EMI) that the power consumption of electronic installation and electronic installation cause when signal transmission.
Another object of the present invention is to provide a kind of method of training equalizer, it optionally makes monitor arrange digital analog converter, takies the area of physical layer to reduce monitor and reduces the manufacturing expense of electronic installation.
For achieving the above object, the invention provides a kind of method sending signal, it comprises the parameter (such as high-frequency energy offset) that the signal (such as training sequence) utilizing external connecting device to be sent to the equalizer (equalizer) of electronic installation obtains equalizer, and the output unit (or claim transmitting device) then adjusting electronic installation according to this parameter is sent to the signal (differential signal as analog form) of external connecting device.Aforesaid electronic installation can be a hand-hold type arithmetic unit (as smart mobile phone or panel computer).The electronic installation that aforesaid external connecting device can be another hand-hold type arithmetic unit (as smart mobile phone or panel computer), a portable equipment (such as Universal series bus memory, external connected hand disk or projector) or one can connect with serial bus or hot inserted mode.
The present invention also provides a kind of electronic installation, and it comprises equalizer and output unit (or claiming transmitting device).The signal (it comprises training sequence) that aforesaid equalizer is sent for accepting and compensate external connecting device.Aforesaid output unit is used for outputing signal (it can be the differential signal of analog form) to external connecting device according to the parameter (such as high-frequency energy offset) of equalizer.Aforesaid electronic installation can be a hand-hold type arithmetic unit (as smart mobile phone or panel computer).The electronic installation that aforesaid external connecting device can be another hand-hold type arithmetic unit (as smart mobile phone or panel computer), a portable equipment (such as Universal series bus memory, external connected hand disk or projector) or one can connect with serial bus or hot inserted mode.
The present invention also provides a kind of method of training equalizer, it comprises the following steps: the gain of (1) adjustment automatic gain control unit, and the signal that automatic gain control unit is exported (voltage swing of such as signal) becomes the scope between two described numerical value from the scope exceeded between two numerical value; (2) utilize the signal that equalizer compensation or adjustment automatic gain control unit export, the signal exported to allow automatic gain control unit (voltage swing of the HFS of such as signal) exceeds the scope between two described numerical value; And the parameter (such as high-frequency energy offset) of (3) adjustment equalizer, the scope of the signal that automatic gain control unit is exported (voltage swing of the HFS of such as signal) between two described numerical value.Aforesaid two numerical value can be two magnitudes of voltage of electronic installation linear operation.
The present invention also provides a kind of method of training equalizer, the gain of it comprises the following steps: (1) adjustment automatic gain control unit to the first yield value, make processing unit detect a signal (as monitor the digital signal that exports) in very first time interval, there is transition; (2) adjust the gain of automatic gain control unit to the second yield value, make processing unit detect described signal and transition does not occur in second time interval; (3) what adjust equalizer compensates to the first offset (the high-frequency energy offset as maximum), makes processing unit detect described signal, in the 3rd time interval, transition occurs; And (4) adjustment equalizer compensate to the second offset (as a high-frequency energy offset), make processing unit detect described signal and transition does not occur in the 4th time interval.The aforesaid first, second, third and fourth time interval is the identical time interval, and it can be the time needed for a package being more than or equal to transmission one training sequence.In addition, in step (1) and step (2), the compensation of equalizer is adjusted to the 3rd offset (the high-frequency energy offset as minimum), and this 3rd offset can be less than aforesaid second offset.Aforesaid first offset can be greater than aforesaid second offset.
Now via the commentary of the following detailed description to illustrative embodiment, alterations and right, these and other element, step, feature, benefit and advantage of the present invention is come into focus.
Accompanying drawing explanation
Fig. 1 is the system block diagrams of first embodiment of the invention;
Fig. 2 is one group of referential data of comparison;
Fig. 3 is the frequency response of a signal after a transmission line (frequencyresponse);
Fig. 4 is the frequency response of a signal after an equalizer;
Fig. 5 is the signal that an electronic installation exports from its output unit according to an output parameter;
Fig. 6 is the present invention adjusts the output signal of an electronic installation flow chart according to a training signal;
Fig. 7 is the training signal that an electronic installation is sent to another electronic installation;
Fig. 8 is the system block diagrams of second embodiment of the invention;
The signal that the equalizer that Fig. 9 A is an electronic installation exports;
The signal that the monitor that Fig. 9 B is an electronic installation exports;
Figure 10 is the present invention adjusts the output signal of an electronic installation flow chart according to a training signal;
Figure 11 A is the part of a training signal in a time interval;
Figure 11 B is the part of an output signal in a time interval of an automatic gain control unit;
Figure 11 C is the part of an output signal in a time interval of an equalizer;
Figure 11 D is the part of an output signal in a time interval of an equalizer;
Figure 12 is the present invention adjusts the output signal of an electronic installation flow chart according to a training signal;
Figure 13 A is the eye pattern that a signal that the present invention passes through to be sent to an electronic installation obtains;
Figure 13 B is the eye pattern that a signal that the present invention passes through to be sent to an electronic installation obtains.
Description of reference numerals: 2-signal transmssion line; 4-first electronic installation; 6-port; 8-second electronic device; 9a-output unit; 9b-receiving element; 10-controller; 12-receiving element; 14-output unit; 16-equalizer; 18-monitor; 20-processing unit; 22-internal storage location; 24-automatic gain control unit; 26-digital analog converter; 28-digital analog converter; Am-amplitude; DE-low-and high-frequency energy differences; Di-low-and high-frequency energy differences; Ds-signal; EH1-eye is high; EH2-eye is high; ISI1-accords with border interference; ISI2-accords with border interference; ISI3-accords with border interference; ISI4-accords with border interference; M1-magnitude of voltage; M2-magnitude of voltage; The Os-amplitude of oscillation; Pa-package; Re-reference voltage; So-signal; S1-first signal; S2-secondary signal; S01-S04-step; S11-S14-step; S21-S25-step; Ta-output; Ts-output; T1-time point; T2-time point; V
h-special value; V
l-special value.
Embodiment
Graphic announcement illustrative embodiment of the present invention.It does not set forth all embodiments.In addition or can substitute and use other embodiments.For saving space or more effectively illustrating, apparent or unnecessary details can be omitted.On the contrary, some embodiments can be implemented and not disclose all details.When same numbers occurs in different drawings, it refers to identical or like or step.
When following description is read together with alterations, can understand aspect of the present invention more fully, the character of these alterations should be considered as illustrative and nonrestrictive.These are graphic may not draw in proportion, but emphasizes principle of the present invention.
Fig. 1 is the schematic diagram of first embodiment of the invention.As shown in Figure 1, one end of a bars transmission line 2 is inserted into the Single port 6 (as serial bus (SerialBus) port) of one first electronic installation 4, and the other end is then connected to a second electronic device 8.First electronic installation 4 and second electronic device 8 can be (but not limiting) hand-hold type arithmetic unit (as smart mobile phone or panel computer) respectively, notebook computer, desktop computer, portable equipment (as USB (UniversalSerialBus, be called for short USB) storage device, external connected hand disk or projector) or any serial bus or heat of being suitable for insert the electronic installation that (HotPlug) mode connects.Signal transmssion line 2 can be (but not limiting) serial bus connecting line, as universal serial bus (USB) transmission line, sequence advanced technology attachment (SerialAdvancedTechnologyAttachment) connecting line, HDMI (High Definition Multimedia Interface) (HighDefinitionMultimediaInterface) connecting line or action Industry Processor Interface (MobileIndustryProcessorInterface).Such as, first electronic installation 4 can be a hand-hold type arithmetic unit (as smart mobile phone or panel computer), second electronic device 8 can be an external connecting device, signal transmssion line 2 can be a serial bus connecting line (as USB transmission line), and port 6 can be a serial bus port (as USB port).The electronic installation that aforesaid external connecting device can be (but not limiting) another hand-hold type arithmetic unit (as smart mobile phone or panel computer), a portable equipment (as USB storage device, external connected hand disk or projector) or is suitable for serial bus or hot inserted mode connects.
First electronic installation 4 comprises controller 10, receiving element 12 and an output unit (or claiming transmitting device) 14.Receiving element 12 and output unit 14 can be a circuit or an element of (but not limiting) physical layer (physicallayer) respectively.Controller 10 couples receiving element 12 and output unit 14 respectively.The signal that receiving element 12 transmits for the output unit 9a receiving second electronic device 8; Output unit 14 is for transmitting or send a signal to a receiving element 9b of second electronic device 8.Receiving element 12 comprises an equalizer (equalizer) 16 and a monitor 18.The effect of equalizer 16 is signal (high frequency) energy loss in transmitting procedure (comprising (high frequency) energy loss that signal transmssion line 2 causes) that compensation output unit 9a transmits, and the signal after compensating is outputted to monitor 18 or processing unit 20 from an output Ts of equalizer 16.Equalizer 16 can be (but not limiting) applicable equalizer (adaptiveequalizer).One input of monitor 18 couples the output Ts of equalizer 16.The effect of monitor 18 is the signal observing equalizer 16 export from output Ts, and transmits a monitor signal (it can be digital signal) to controller 10 according to the signal that output Ts exports.Monitor 18 can be maybe to comprise a voltage monitor, an eye pattern monitor (eyediagrammonitor) or a monitor containing integrator (integrator).
Controller 10 comprises a processing unit (processingunit) 20 and an internal storage location 22 (as static random access memory (staticrandomaccessmemory)).Processing unit 20 couples monitor 18 and internal storage location 22 respectively.One input of processing unit 20 couples the output Ts of equalizer 16.Two inputs of processing unit 20 couple an input of output unit 14 and an input of equalizer 16 respectively.One group of referential data is stored, in order to provide the reference frame of processing unit 20 comparison in internal storage location 22.This group referential data comprises multiple than logarithm value (such as multiple peak levels (peakinglevel)) and each is than the corresponding length of transmission line of logarithm value and/or be output parameter (comprising the size of the amplitude of oscillation (swing) or amplitude (amplitude) and the gap of high-frequency energy and low frequency energy), as shown in Figure 2.Above-mentioned those can be multiple energy compensating values than logarithm value, such as, can be the high-frequency energy offset (namely peak levels, its unit can be decibel (dB)) of different length of transmission line.Above-mentioned those also can be multiple low-and high-frequency energy differences (namely energy losses (loss)) than logarithm value, such as, can be the gap of the high-frequency energy that causes of different length of transmission line and low frequency energy.In the present invention, second electronic device 8 also can be directly connected to the first electronic installation 4 by signal transmssion line 2; In this case, the length of transmission line is zero.
The training signal (as training sequence (trainingsequence)) that processing unit 20 can be transmitted by output unit 9a trains equalizer 16, and after equalizer 16 completes training, obtain a parameter or the numerical value of equalizer 16, such as equalizer 16 is for the energy compensating value (such as high-frequency energy offset, or be called peak levels) of compensation training signal.This energy compensating value can compensation training signal in (high frequency) energy loss after transmission line 2 or loss, the namely low-and high-frequency energy differences of training signal after transmission line 2 (or being called the gap of high-frequency energy and low frequency energy).When length of transmission line is zero (namely second electronic device 8 is directly connected to the first electronic installation 4 without transmission line 2), this energy compensating value can be (but not limiting) zero, as shown in Figure 2.When second electronic device 8 is connected to first electronic installation 4 by transmission line 2, the signal (comprising training signal) that output unit 9a transmits can produce (high frequency) energy loss or loss after transmission line 2, high-frequency energy as shown in Figure 3 and the gap DE of low frequency energy; Compensated with this energy compensating value by equalizer 16, then the high-frequency energy of the signal (comprising training signal) that output unit 9a can be made to transmit equals low frequency energy, as shown in Figure 4.
Then, the energy compensating value (or low-and high-frequency energy differences) obtained and above-mentioned alignment parameters are compared by processing unit 20, and then obtain the length of transmission line 2 and/or be an output parameter, the low-and high-frequency energy difference that this output parameter comprises signal is apart from the amplitude of oscillation size (amplitude of oscillation Os as shown in Figure 5) of (high-frequency energy as shown in Figure 5 and the difference Di of low frequency energy) and signal or amplitude size (amplitude A m as shown in Figure 5).Then, processing unit 20, according to this output parameter adjustment output unit 14, allows output unit 14 according to this output parameter transmission or sends the receiving element 9b of a signal (it can be the differential signal So of the analog form shown in Fig. 5) to second electronic device 8.The present invention by pre-strengthening (pre-emphasis) or can go the mode strengthening (de-emphasis), makes the signal being sent to receiving element 9b meet low-and high-frequency energy difference distance in output parameter when output unit 14 exports.
In Figure 5, the signal So that output unit 14 exports comprises transition position (transitionbit) and non-transition position (non-transitionbit).Transition position is the HFS of signal So; Non-transition position is the low frequency part of signal So.The present embodiment by strengthening or go the mode of strengthening in advance, can make the low-and high-frequency energy differences Di that the high-frequency energy of signal So and the gap of low frequency energy equal above-mentioned.
Below by way of the step S01 of Fig. 6 to step S04, describe the first electronic installation 4 when connecting second electronic device 8, the mode of the first electronic installation 4 adjustment output signal automatically.
Step S01:
The initial stage of second electronic device 8 is connected, the training signal (as a training sequence) that the output unit 9a that the receiving element 12 of the first electronic installation 4 receives second electronic device 8 transmits at the first electronic installation 4.This training signal can be the differential signal that (but not limiting) transmits in an analogue form.Fig. 7 is an example of training signal.As shown in Figure 7, training signal comprises multiple package Pa, and each package Pa has identical composition (or composition) and identical transmission time T.
Step S02:
Processing unit 20 utilizes training signal to train equalizer 16, and after the training completing equalizer 16, obtains the energy compensating value (such as high-frequency energy offset, or be called peak levels) of equalizer 16 for compensation training signal.This energy compensating value can compensation training signal in (high frequency) energy loss after transmission line 2 or loss (gap as high-frequency energy and low frequency energy), and be used for compensating the signal that follow-up output unit 9a is sent to receiving element 12 by equalizer 16.
In step S02, processing unit 20 utilizes monitor 18 to observe or detect the training process of equalizer 16.In this training process, the signal (hereinafter referred to as " output signal Eo ") that monitor 18 observes equalizer 16 export from output Ts, and transmit a monitor signal (it can be a digital signal) to processing unit 20 according to output signal Eo.Processing unit 20 is (it can be the transmission time T being more than or equal to package Pa) monitor signal of constantly analyzing, detect or observe monitor 18 to send at the same time.Because training signal contains many identical package Pa, thus processing unit 20 can judge to output signal Eo according to the monitor signal in certain time interval high-frequency energy and low frequency energy whether (haply) equal or whether the eye pattern (eyediagram) outputing signal Eo reaches a particular state (as optimum state).
When the high-frequency energy of monitor signal display translation signal Eo that monitor 18 exports does not have with low frequency energy that (haply), eye pattern that is equal or display translation signal Eo did not reach particular state, processing unit 20 readjusts the parameter of equalizer 16, and then the high-frequency energy and the low frequency energy that judge output signal Eo according to the monitor signal that monitor 18 exports whether (haply) equal or whether the eye pattern outputing signal Eo reaches particular state.Repeat said procedure, until the high-frequency energy eye pattern that is equal with low frequency energy (haply) or display translation signal Eo of the monitor signal display translation signal Eo of monitor 18 output reaches particular state.When the high-frequency energy eye pattern that is equal with low frequency energy (haply) or display translation signal Eo of monitor signal display translation signal Eo that monitor 18 exports has reached particular state time, processing unit 20 has completed the training of equalizer 16 and has obtained equalizer 16 and be used for compensation training signal energy and lose or the energy compensating value (it is a parameter or a numerical value of equalizer 16) of loss.In the present invention, step S02 can come by training the mode of equalizer 16.
Step S03:
After obtaining the energy compensating value of equalizer 16 for compensation training signal, processing unit 20 carries out table look-up action or a comparison action, is namely compared than logarithm value (as previously described) by those storage in this energy compensating value and internal storage location 22.Then, processing unit 20 just can be learnt the length of transmission line 2 and/or be obtain corresponding output parameter (it comprises the gap of low-and high-frequency energy of signal and the amplitude of oscillation of signal or amplitude size).
Step S04:
After completing steps S03, processing unit 20, according to the output parameter adjustment output unit 14 obtained, allows output unit 14 according to the output parameter transmission obtained or sends the receiving element 9b of a signal (differential signal of the analog form such as shown in Fig. 5) to second electronic device 8.Therefore, first electronic installation 4 can according to a parameter of equalizer 16 or numerical value (such as high-frequency energy offset), and adjustment output unit 14 is sent to the signal (it can be the differential signal of the analog form shown in Fig. 5) of second electronic device 8.
Fig. 8 is the schematic diagram of second embodiment of the invention.As shown in Figure 8, the receiving element 12 of the first electronic installation 4 also comprises automatic growth control (automaticgaincontrol) unit 24 and two digital analog converters (digital-to-analogconverter) 26 and 28.One output Ta of automatic gain control unit 24 couples an input of equalizer 16.One input of digital analog converter 26 couples an output of processing unit 20, and an output of digital analog converter 26 couples an input of automatic gain control unit 24.One input of digital analog converter 28 couples an output of processing unit 20, and an output of digital analog converter 28 couples an input of equalizer 16.In a second embodiment, monitor 18 can not need, and (but not limiting) comprises digital analog converter, takies the area of physical layer to reduce monitor 18 and reduces the manufacturing expense of the first electronic installation 4.
Automatic gain control unit 24 can receive signal (comprising training signal) that output unit 9a transmits and adjust (voltage) amplitude of oscillation of the signal (comprising training signal) that output unit 9a transmits, and then the signal (namely through signal that automatic gain control unit 24 adjusts) after adjustment is sent to equalizer 16 from its output Ta.Equalizer 16 can compensate the signal that automatic gain control unit 24 sends, and then the signal after compensation is sent to monitor 18 or processing unit 20 from its output Ts.The digital signal that processing unit 20 can be used for controlling automatic gain control unit 24 by digital analog converter 26 converts analog signal to, and delivers to automatic gain control unit 24; Therefore, processing unit 20 can adjust or control the yield value of signal (comprise training signal) of automatic gain control unit 24 for adjusting output unit 9a and transmitting.The digital signal that processing unit 20 can be used for controlling equalizer 16 by digital analog converter 28 converts analog signal to, and delivers to equalizer 16; Therefore, processing unit 20 can adjust (or control) equalizer 16 is for the energy compensating value (such as high-frequency energy offset, or be called peak levels) of compensation training signal.
In this enforcement, processing unit 20 can constantly be observed, detect or situation that monitor signal (it can be a digital signal) that research and application device 18 sends is inner at same time interval (it is more than or equal to above-mentioned transmission time T).Because training signal comprises many identical package Pa, so the situation of processing unit 20 monitor signal that can be sent by monitor 18 in interval is sometime judged the training signal that adjusts through automatic gain control unit 24 or whether meets correlated condition through the training signal (its output Ts from equalizer 16 exports) that equalizer 16 compensates.Such as, whether processing unit 20 can there is the mode of transition (transition) in interval sometime by detecting monitor 18 monitor signal that send, whether maximum (voltage) amplitude of oscillation judging the training signal adjusted through automatic gain control unit 24 or maximum (voltage) amplitude of oscillation of training signal compensated through equalizer 16 are positioned between two special values (two magnitudes of voltage as the first electronic installation 4 linear operation).
For Fig. 9 A and 9B, the signal (it can comprise the first signal S1 and secondary signal S2 shown in Fig. 9 A) that the monitor signal (the signal Ds namely shown in Fig. 9 B) that monitor 18 transmits exports from output Ts by equalizer 16 and two special values (two magnitude of voltage M1 and M2 of the first electronic installation 4 linear operation as shown in Figure 9 A) obtain.Such as, the magnitude of voltage of the first signal S1 is deducted the magnitude of voltage of secondary signal S2 to obtain the first voltage change, and magnitude of voltage M1 is deducted magnitude of voltage M2 to obtain the second voltage change.Then, the first voltage change is deducted the second voltage change and just can obtain signal Ds.Then can be deducted magnitude of voltage M2 to obtain by magnitude of voltage M1 as reference voltage Re.
In figures 9 b and 9, the monitor signal (namely signal Ds) that monitor 18 transmits is when time point T1, its logic level (logiclevel) by logical one transfer to logical zero (namely signal Ds by be greater than reference voltage Re become be less than reference voltage Re), thus there occurs a transition.Then, signal Ds when time point T2, its logic level by logical zero transfer to logical one (namely signal Ds by be less than reference voltage Re become be greater than reference voltage Re), thus there occurs another transition.Can there is transition in signal Ds, the representative of this situation has the amplitude of oscillation to exceed scope between two magnitude of voltage M1 and M2 from the signal that output Ts exports.If not there is transition in signal Ds in interval sometime, the maximum amplitude of oscillation of the training signal that this situation representative adjusts through automatic gain control unit 24 or the scope of the maximum amplitude of oscillation between two magnitude of voltage M1 and M2 of training signal compensated through equalizer 16.
The second embodiment shown in Fig. 8 can complete the step S01 shown in Fig. 6 to step S04.About the second embodiment performs the part of step S01, S03 and S04, refer to the related description of Fig. 6.Below by way of the step S11 of Figure 10 to step S14, describe a kind of mode of the second embodiment completing steps S02.In step S11 to step S14, the situation that the monitor signal that processing unit 20 can be observed constantly or detecting monitor 18 sends is inner at same time interval (being such as more than or equal to above-mentioned transmission time T).In addition, any one time interval mentioned in step S11 to step S14 is all identical, and each time interval can be more than or equal to above-mentioned transmission time T.
Step S11:
The gain of automatic gain control unit 24 pairs of training signals is increased to a certain gain value (as maxgain value), the maximum amplitude of oscillation (it can be the maximum voltage amplitude of oscillation of the low frequency energy of signal SA) of training signal (hereinafter referred to as " signal SA ", its output Ta from automatic gain control unit 24 exports) in a time interval adjusted through automatic gain control unit 24 is made to exceed two special value V
hand V
lbetween scope, as shown in Figure 11 A.Numerical value V
hcan be above-mentioned magnitude of voltage M1, numerical value V
lcan be above-mentioned magnitude of voltage M2.In addition, before carrying out step S13, equalizer 16 is used for the energy compensating value (such as high-frequency energy offset) of compensating signal SA and is cut to the first energy compensating value (the energy compensating value as minimum), and equalizer 16 is not temporarily compensated signal SA.In this step, because the compensation that the gain of automatic gain control unit 24 is adjusted to above-mentioned certain gain value and equalizer 16 is cut to the first above-mentioned energy compensating value, so allow processing unit 20 detect, monitor signal that monitor 18 sends has a transition at least in a time interval.
Step S12:
After step s 11, from above-mentioned certain gain value, downgrade the yield value of automatic gain control unit 24 pairs of training signals, until signal SA maximum (voltage) amplitude of oscillation in a time interval is positioned at two special value V
hand V
lbetween scope till, as shown in Figure 11 B.In this step, in interval sometime, all transition does not occur when processing unit 20 detects monitor 18 sends monitor signal, the maximum amplitude of oscillation of representation signal SA in a time interval is positioned at two special value V
hand V
lbetween scope.During this time, processing unit 20 stops the yield value downgrading automatic gain control unit 24 pairs of training signals, allows automatic gain control unit 24 adjust the signal (comprising the part that training signal is remaining) that follow-up output unit 9a is sent to receiving element 12 with the yield value downgraded for the last time (hereinafter referred to as " yield value GF ").In addition, because the gain of automatic gain control unit 24 is adjusted to yield value GF, so allow processing unit 20 detect all not there is transition in monitor signal that monitor 18 sends in a time interval.After step S12 completes, by two special value V
hand V
lthe low frequency energy of training signal can be obtained.
Step S13:
After completing steps S12, equalizer 16 being used for the energy compensating value of compensating signal SA increases the second energy compensating value (the energy compensating value as maximum), make the maximum amplitude of oscillation (it can be the maximum voltage amplitude of oscillation of the high-frequency energy of signal SE) of signal SA (hereinafter referred to as " signal SE ", its output Ts from equalizer 16 exports) in a time interval compensated through equalizer 16 more than two special value V
hand V
lbetween scope, as shown in Figure 11 C.In this step, because the compensation of equalizer 16 is increased to the second energy compensating value (it is greater than the first energy compensating value described in step S11), so allow processing unit 20 detect, monitor signal that monitor 18 sends has a transition at least in a time interval.After completing steps S13, the high-frequency energy of signal SE can be greater than the low frequency energy of signal SE.In addition, signal SE can be the output signal Eo described in step S02.
Step S14:
After completing steps S13, from the second above-mentioned energy compensating value, downgrade equalizer 16 be used for the energy compensating value of compensating signal SA, until the maximum amplitude of oscillation of signal SE in a time interval is positioned at two special value V
hand V
lbetween scope till, as shown in Figure 11 D.In this step, in interval sometime, all transition does not occur when processing unit 20 detects monitor 18 sends monitor signal, the maximum amplitude of oscillation of representation signal SE in a time interval is positioned at two special value V
hand V
lbetween scope.During this time, processing unit 20 can stop downgrading equalizer 16 be used for compensating signal SA energy compensating value and record the energy compensating value (hereinafter referred to as " energy compensating value PA ") downgraded for the last time.In addition, equalizer 16 can compensate the signal that follow-up output unit 9a is sent to receiving element 12 with energy compensating value PA.In step S14, because the compensation of equalizer 16 is adjusted to energy compensating value PA, (it is greater than the first energy compensating value described in step S11, but the second energy compensating value be less than described in step S13), so allow processing unit 20 detect all not there is transition in monitor signal that monitor 18 sends in a time interval.
After completion of the step s 14, because the high-frequency energy of signal SE (haply) equals the low frequency energy of signal SE, so processing unit 20 not only completes the training of equalizer 16, also therefore obtain equalizer 16 and be used for the energy compensating value PA (it is for the equalizer 16 described in step S02 is for the energy compensating value of compensation training signal) of compensating signal SA.After acquisition energy compensating value PA, processing unit 20 carries out step S03 according to energy compensating value PA.In a second embodiment, step S11 to step S14 is a kind of mode of training equalizer 16.
Below by way of the step S21 of Figure 12 to step S25, describe the another kind of mode of the second embodiment completing steps S02.In step S21 to step S25, processing unit 20 can observe the monitor signal that sends of monitor 18 constantly in same time interval (it can be more than or equal to above-mentioned transmission time T) inner situation.In addition,
Any one time interval mentioned in step S21 to step S25 is all identical, and each time interval can be more than or equal to above-mentioned transmission time T.
Step S21:
The yield value of automatic gain control unit 24 pairs of training signals is cut to a certain gain value (as minimum gain value), the maximum amplitude of oscillation (it can be the maximum voltage amplitude of oscillation of the low frequency energy of signal SG) of training signal (hereinafter referred to as " signal SG ", its output Ta from automatic gain control unit 24 exports) in a time interval adjusted through automatic gain control unit 24 is made to be positioned at two special value V
hand V
lbetween scope.Numerical value V
hcan be above-mentioned magnitude of voltage M1, numerical value V
lcan be above-mentioned magnitude of voltage M2.In addition, before carrying out step S24, equalizer 16 is used for the energy compensating value (such as high-frequency energy offset) of compensating signal SG and is cut to the first energy compensating value (the energy compensating value as minimum), and equalizer 16 is not temporarily compensated signal SG.In this step, because the compensation that the gain of automatic gain control unit 24 is adjusted to above-mentioned certain gain value and equalizer 16 is cut to the first above-mentioned energy compensating value, so allow processing unit 20 detect all not there is transition in monitor signal that monitor 18 sends in a time interval.
Step S22:
After step s 21, from above-mentioned certain gain value, increase the yield value of automatic gain control unit 24 pairs of training signals, until the maximum amplitude of oscillation of signal SG in a time interval exceeds two special value V
hand V
lbetween scope till (yield value is now called " yield value Gn ").In this step, in interval sometime, have a transition when processing unit 20 detects monitor 18 sends monitor signal at least, maximum (voltage) amplitude of oscillation of representation signal SG exceeds two special value V
hand V
lbetween scope.In addition, because the gain of automatic gain control unit 24 is adjusted to yield value Gn, so allow processing unit 20 detect, monitor signal that monitor 18 sends has a transition at least in a time interval.
Step S23:
After completion of the step s 22, the yield value of automatic gain control unit 24 pairs of training signals is adjusted back to previous yield value (hereinafter referred to as " yield value Gn-1 "), make signal SG maximum (voltage) amplitude of oscillation in a time interval be positioned at two special value V once again
hand V
lbetween scope.In this step, because the gain of automatic gain control unit 24 is adjusted to yield value Gn-1, so allow processing unit 20 detect all not there is transition in monitor signal that monitor 18 sends in a time interval.After step S23, automatic gain control unit 24 can adjust the signal (comprising the part that training signal is remaining) that follow-up output unit 9a is sent to receiving element 12 with yield value Gn-1.The present embodiment can after step S23 completes, by two special value V
hand V
lobtain the low frequency energy of training signal.
Step S24:
After completing steps S23, equalizer 16 being used for the energy compensating value of compensating signal SG increases the second energy compensating value (the energy compensating value as maximum), make the maximum amplitude of oscillation (it can be the maximum voltage amplitude of oscillation of the high-frequency energy of signal SQ) of signal SG (hereinafter referred to as " signal SQ ", its output Ts from equalizer 16 exports) in a time interval compensated through equalizer 16 more than two special value V
hand V
lbetween scope.In this step, because the compensation of equalizer 16 is increased to the second energy compensating value (it is greater than the first energy compensating value described in step S21), so allow processing unit 20 detect, monitor signal that monitor 18 sends has a transition at least in a time interval.After completing steps S24, the high-frequency energy of signal SQ can be greater than the low frequency energy of signal SQ.In addition, signal SQ can be the output signal Eo described in step S02.
Step S25:
After completing steps S24, from the second above-mentioned energy compensating value, downgrade equalizer 16 be used for the energy compensating value of compensating signal SG, until the maximum amplitude of oscillation of signal SQ in a time interval is positioned at two special value V
hand V
lbetween scope till.In this step, in interval sometime, all transition does not occur when processing unit 20 detects monitor 18 sends monitor signal, the maximum amplitude of oscillation of representation signal SQ in a time interval is positioned at two special value V
hand V
lbetween scope.During this time, processing unit 20 stop downgrading equalizer 16 be used for compensating signal SG energy compensating value and record the energy compensating value (hereinafter referred to as " energy compensating value PB ") that downgrades for the last time.In addition, equalizer 16 can compensate the signal that follow-up output unit 9a is sent to receiving element 12 with energy compensating value PB.In step s 25, because the compensation of equalizer 16 is adjusted to energy compensating value PB, (it is greater than the first energy compensating value described in step S21, but the second energy compensating value be less than described in step S24), so allow processing unit 20 detect all not there is transition in monitor signal that monitor 18 sends in a time interval.
After completion of step s 25, because the high-frequency energy of signal SQ (haply) equals the low frequency energy of signal SQ, so processing unit 20 not only completes training (or the adjustment) process of equalizer 16, also therefore obtain equalizer 16 and be used for the energy compensating value PB (it is for the equalizer 16 described in step S02 is for the energy compensating value of compensation training signal) of compensating signal SG.After acquisition energy compensating value PB, processing unit 20 carries out step S03 according to energy compensating value PB.In a second embodiment, step S21 to step S25 is the another kind of mode of training (or adjustment) equalizer 16.
From the above-mentioned first or second embodiment, when the first electronic installation 4 is connected to second electronic device 8 (or being called electronic product) by the signal transmssion line of different length time, the first electronic installation 4 can adjust according to the length of signal transmssion line the output signal (it can be the differential signal transmitted in an analogue form) that output unit 14 is sent to the receiving element 9b of second electronic device 8.The first electronic installation 4 and second electronic device 8 is connected to use the first signal transmssion line or secondary signal transmission line.When the first electronic installation 4 connects second electronic device 8 by the first signal transmssion line time, first electronic installation 4 can adjust output unit 14 according to the length of the first signal transmssion line, allows the signal of the receiving element 9b being sent to second electronic device 8 (hereinafter referred to as " the first signal ") meet the first output parameter (it comprises the gap of high-frequency energy and low frequency energy and the numerical value of the amplitude of oscillation or amplitude) when output unit 14 exports.When the first electronic installation 4 connects second electronic device 8 by secondary signal transmission line time, first electronic installation 4 can adjust output unit 14 according to the length of secondary signal transmission line, allows the signal of the receiving element 9b being sent to second electronic device 8 (hereinafter referred to as " secondary signal ") meet the second output parameter (it comprises the gap of high-frequency energy and low frequency energy and the numerical value of the amplitude of oscillation or amplitude) when output unit 14 exports.First signal transmssion line can be the serial bus connecting line that (but not limiting) two length are different with secondary signal transmission line, universal serial bus (USB) transmission line, sequence advanced technology attachment connecting line, HDMI (High Definition Multimedia Interface) connecting line or action Industry Processor Interface that such as two length is different.
When the length of secondary signal transmission line is more than or equal to 90 times, 100 times of the length of the first signal transmssion line or 110 times, secondary signal can be more than or equal to 1.3 times, 1.4 times or 1.5 times an of amplitude of oscillation (it can be an amplitude of oscillation of the low-frequency component of first signal) of the first signal at port 6 in an amplitude of oscillation (it can be an amplitude of oscillation of the low-frequency component of secondary signal) of port 6.In addition, an amplitude of oscillation of the low-frequency component of the secondary signal received by second electronic device 8 can be more than or equal to 1.3 times, 1.4 times or 1.5 times of an amplitude of oscillation of the low-frequency component of the first signal received by second electronic device 8.
After second electronic device 8 receives the first signal by the first signal transmssion line, second electronic device 8 can pass through the first signal acquisition one eye pattern, as shown in FIG. 13A.In figure 13a, the summation of two symbol border interference (InterSymbolInterference) ISI1 and ISI2 is less than or equal to 0.3 times, 0.2 times or 0.1 times of the high EH1 of eye.In addition, after second electronic device 8 receives secondary signal by secondary signal transmission line, second electronic device 8 can obtain another eye pattern by secondary signal, as shown in Figure 13 B.In Figure 13 B, the summation of two symbol border interference ISI3 and ISI4 is less than or equal to 0.3 times, 0.2 times or 0.1 times of the high EH2 of eye.In the example of Figure 13 A and Figure 13 B, the length of secondary signal transmission line can be more than or equal to 90 times, 100 times or 110 times of the length of the first signal transmssion line.
Except connecting except the first electronic installation 4 and second electronic device 8 with signal transmssion line 2, second electronic device 8 also can connect the first electronic installation 4 by the mode of radio communication (as bluetooth (Bluetooth), ultra broadband (Ultra-wideband), Wireless Fidelity (WirelessFidelity), radio frequency identification (RadioFrequencyIdentification), wireless near field communication (NearFieldCommunication) or purple honeybee (ZigBee)).In this case, the first electronic installation 4 accepts by above-mentioned communication training signal (as training sequence) that second electronic device 8 transmits and transmits signal that output unit 14 exports to second electronic device 8.By the mode described in Fig. 6, Figure 10 or Figure 12, first electronic installation 4 can by equalizer 16 be used for compensation training signal energy compensating value and learn (wireless) transmission range between stream oriented device 4 and 8 and corresponding output parameter (it comprises the size of the amplitude of oscillation (or amplitude) and the gap of high-frequency energy and low frequency energy), detailed content refers to relevant describing, and is no longer described in detail herein.
The above illustrates feature of the present invention by embodiment; its object is to make to have the knack of this operator can understand content of the present invention and implement according to this; and non-limiting protection scope of the present invention; therefore; all other do not depart from the equivalence that disclosed spirit completes and modify or amendment, must be included in this case protection range.
Claims (10)
1. send a method for signal, it is characterized in that, comprise the following steps:
Utilize an external connecting device to be sent to one first signal of an equalizer, obtain a parameter of this equalizer; And
According to this parameter, adjustment is sent to a secondary signal of this external connecting device.
2. signal sending method according to claim 1, wherein this parameter is an energy compensating value.
3. signal sending method according to claim 1, wherein this external connecting device is a Universal series bus memory.
4. signal sending method according to claim 1, wherein this first signal is a training sequence.
5. an electronic installation, is characterized in that, comprising:
One equalizer, for accepting one first signal of an external connecting device; And
One output unit, for exporting a secondary signal to this external connecting device according to a parameter of this equalizer.
6. electronic installation according to claim 5, wherein this parameter is an energy compensating value.
7. electronic installation according to claim 5, wherein this external connecting device is a Universal series bus memory.
8. electronic installation according to claim 5, wherein this first signal is a training sequence.
9. an electronic installation, it is characterized in that, it is suitable for transmitting one first signal to external connecting device by one first signal transmssion line, and be suitable for transmitting a secondary signal to this external connecting device by a secondary signal transmission line, the length of this first signal transmssion line is greater than 90 times of the length of this secondary signal transmission line, and an amplitude of oscillation of the low-frequency component of this first signal is greater than 1.3 times of an amplitude of oscillation of the low-frequency component of this secondary signal.
10. electronic installation according to claim 9, wherein this external connecting device is a Universal series bus memory.
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