CN103248428B - A kind of method that adaptive peak controls, device and digital optical fiber direct station - Google Patents
A kind of method that adaptive peak controls, device and digital optical fiber direct station Download PDFInfo
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- CN103248428B CN103248428B CN201210028107.8A CN201210028107A CN103248428B CN 103248428 B CN103248428 B CN 103248428B CN 201210028107 A CN201210028107 A CN 201210028107A CN 103248428 B CN103248428 B CN 103248428B
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Abstract
The invention discloses method, device and digital optical fiber direct station that a kind of adaptive peak controls, when receiving current input signal, determine the power output P-1 point of the power amplifier curve of current input signal, the input power value corresponding on power amplifier curve according to power output P-1 point, or according to the maximum power value of current input signal, upgrade and current start to control thresholding; According to the power starting to control thresholding adjustment current input signal after renewal.Owing to carrying out dynamic conditioning according to the power output P-1 point of current input signal or the maximum power value of current input signal to starting to control thresholding, and use the thresholding that starts to control after dynamic conditioning to regulate current input signal, make the current input signal after adjusting when power amplification, power output P-1 point can not entered, cause on the basis of digital pre-distortion, can ensure to export maximum power, thus improve overall power amplification efficiency.
Description
Technical field
The present invention relates to technical field of communication network, particularly relate to method, device and digital optical fiber direct station that a kind of adaptive peak controls.
Background technology
The structural representation of digital optical fiber direct station as shown in Figure 1, its operation principle is as follows: downstream signal is directly coupled to the near-end machine of digital optical fiber direct station from base station, intermediate-freuqncy signal is become after down-conversion, intermediate-freuqncy signal is transformed to digital signal after the conversion of modulus A/D converter, digital signal by be packaged into after Base-Band Processing applicable standard interface protocol require frame format after, the remote termination of digital optical fiber direct station is sent to by fiber optical transceiver and optical fiber, after the baseband digital signal received is sent into Base-Band Processing by fiber optical transceiver by remote termination, analog if signal is transformed into after the conversion of digital-to-analogue D/A converter, become radiofrequency signal finally by upward frequency conversion and by after power amplification by antenna transmission.Generally in above process, automatic growth control AGC module is set in the baseband processing section branch of near-end machine and is used for the peak value of control inputs signal, namely in AGC, fixing peak value threshold is set, when the peak value threshold of input signal, AGC will play the power of controlling attenuation input signal, avoid input signal to enter power output P-1 point when ingoing power amplifies, cause digital pre-distortion (DPD) and do not offset effect.But in the specific implementation, because the peak value threshold in AGC is fixed value, and the power output P-1 point of each input signal is different, further, the power output P-1 point of same input signal also can change under various circumstances, when the power output P-1 point of the peak value threshold that will be set to fixed value like this lower than input signal, cause input signal can not export maximum power after power amplification, reduce overall power amplification efficiency.
Summary of the invention
Embodiments provide method, device and digital optical fiber direct station that a kind of adaptive peak controls, according to the power output P-1 point dynamic conditioning of current input signal, the problem that can not export maximum power can not be caused in order to solve existing peak value threshold.
The method that a kind of adaptive peak that the embodiment of the present invention provides controls, comprising:
When receiving current input signal, determine the power output P-1 point of the power amplifier curve of described current input signal; The difference of gain and the gain of described power amplifier curve linear that described power output P-1 point is defined as power output on power amplifier curve equals output power value during the first set point;
Determine whether the output power value that the maximum power value of described current input signal is corresponding on power amplifier curve reaches power output P-1 point; If so, corresponding on described power amplifier curve according to power output P-1 point input power value, upgrades and current starts to control thresholding; If not, according to the maximum power value of described current input signal, upgrade and current start to control thresholding;
According to starting to control the power that thresholding regulates described current input signal after upgrading, after making the power of current input signal after adjusting be less than described renewal, start to control thresholding.
The device that a kind of adaptive peak that the embodiment of the present invention provides controls, comprising: Digital Signal Processing DSP module and peak value automatic growth control PEAK_AGC module;
Described DSP module, comprising: determine power output P-1 point module and determine to start to control threshold module;
Describedly determining power output P-1 point module, for when receiving current input signal, determining the power output P-1 point of the power amplifier curve of described current input signal; The difference of gain and the gain of described power amplifier curve linear that described power output P-1 point is defined as power output on power amplifier curve equals output power value during the first set point;
Describedly determine to start to control threshold module, for determining whether the output power value that the maximum power value of described current input signal is corresponding on power amplifier curve reaches power output P-1 point; If so, corresponding on described power amplifier curve according to power output P-1 point input power value, upgrades and current starts to control thresholding; If not, according to the maximum power value of described current input signal, upgrade and current start to control thresholding, and the thresholding that starts to control after upgrading is issued to PEAK_AGC module;
Described PEAK_AGC module, for receive described determine to start to control the renewal that threshold module issues after start to control thresholding, according to starting to control the power that thresholding regulates described current input signal after upgrading, after making the power of current input signal after adjusting be less than described renewal, start to control thresholding.
The embodiment of the present invention additionally provides a kind of digital optical fiber direct station, the device that the above-mentioned adaptive peak that comprising the embodiment of the present invention provides controls.
The beneficial effect of the embodiment of the present invention comprises:
Method, device and digital optical fiber direct station that a kind of adaptive peak that the embodiment of the present invention provides controls, when receiving current input signal, after determining the power output P-1 point of the power amplifier curve of current input signal, determine whether the output power value that the maximum power value of current input signal is corresponding on power amplifier curve reaches power output P-1 point; If so, corresponding on power amplifier curve according to power output P-1 point input power value, upgrades and current starts to control thresholding; If not, according to the maximum power value of current input signal, upgrade and current start to control thresholding; According to the power starting to control thresholding adjustment current input signal after renewal.Owing to carrying out dynamic conditioning according to the power output P-1 point of current input signal or the maximum power value of current input signal to starting to control thresholding, and use the thresholding that starts to control after dynamic conditioning to regulate current input signal, make the current input signal after adjusting when power amplification, power output P-1 point can not entered, cause on the basis of digital pre-distortion, can ensure to export maximum power, thus improve overall power amplification efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of digital optical fiber direct station of the prior art;
The flow chart of the method that the adaptive peak that Fig. 2 provides for the embodiment of the present invention controls;
The flow chart of what the renewal that Fig. 3 provides for the embodiment of the present invention was current start to control thresholding;
The flow chart of the power of the adjustment current input signal that Fig. 4 provides for the embodiment of the present invention;
The structural representation of the device that the adaptive peak that Fig. 5 provides for the embodiment of the present invention controls.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of the method that the adaptive peak provided the embodiment of the present invention controls, device and digital optical fiber direct station is described in detail.
The method that the adaptive peak that the embodiment of the present invention provides controls, as shown in Figure 2, idiographic flow comprises the following steps:
S201, when receiving current input signal, determine the power output P-1 point of the power amplifier curve of current input signal; Wherein, the output power value when difference of the power output P-1 point gain and the gain of power amplifier curve linear that are defined as power output on power amplifier curve equals the first set point;
Wherein, the span of the first set point is-1dB ~ 0dB, in the specific implementation, consider the factors such as signal noise, preferably, the first set point can be set to-0.7dB, is set to-0.7dB illustrates in the following description of the embodiment of the present invention for the first set point.
S202, determine whether the output power value that the maximum power value of current input signal is corresponding on power amplifier curve reaches power output P-1 point; If so, step S203 is performed; If not, step S204 is performed;
S203, the input power value corresponding on described power amplifier curve according to power output P-1 point, upgrade and current start to control thresholding;
S204, maximum power value according to current input signal, upgrade and current start to control thresholding;
S205, regulate the power of current input signal according to the thresholding that starts to control after upgrading, after making the power of the current input signal after adjusting be less than renewal, start to control thresholding.
Below the specific implementation of above steps is described in detail.
Preferably, before carrying out above-mentioned steps S201 and determining the power output P-1 point of the power amplifier curve of current input signal, can also comprise: judge whether the maximum power value of current input signal is greater than the operation of the peak value of setting, when judging that the maximum power value of current input signal is greater than the peak value of setting, turn to the operation of the power output P-1 point of the power amplifier curve determining current input signal, when judging that the maximum power value of current input signal is less than the peak value of setting, step S201 ~ S204 can be skipped, direct execution step S205 uses the current power starting to control thresholding adjustment current input signal, so just can simplify when the current input signal received is too small, namely be significantly less than current record start to control thresholding time, also to carry out upgrading the current operation of starting to control thresholding, the process that the peak value optimizing overall input signal controls, thus improve the overall speed of service.Wherein, the peak value of setting can set based on experience value, such as, be set to 6000, do not limit at this.
Particularly, in above-mentioned steps S201, determine that the detailed process of the power output P-1 point of the power amplifier curve of current input signal can comprise the following steps:
First, use the feedback signal matching power amplifier curve of current input signal and previous input signal, wherein, the detailed process of matching power amplifier curve belongs to prior art, does not repeat them here;
Preferably, before matching power amplifier curve, the operation of alignment gain and phase alignment can also be carried out respectively to current input signal and feedback signal.
Then, determine the power output P-1 point of the matching power amplifier curve of current input signal, the gain namely determining power output on the power amplifier curve simulated and the difference of the power amplifier curve linear gain simulated equal output power value during-0.7dB.
Particularly, the specific implementation process of above-mentioned steps S202 ~ S204, as shown in Figure 3, can be realized by following step:
The maximum power value of S301, use current input signal, generates one group of linear input power value;
During concrete enforcement, can the maximum power value a of current input signal
0for maximum, b is stepping, obtains the input power value a of one group of linear decrease
0, a
1, a
2a
n, wherein, a
n=a
n-1the size of-b, n>=1, b and n can choose an optimum value according to actual environment, such as: b=0.1, n=15.
S302, using the input of linear input power value as power amplifier curve, obtain one group of corresponding output power value;
The gain inequality of S303, the gain calculating the maximum in one group of output power value and the linear gain of power amplifier curve simulated;
S304, determine whether gain inequality is not more than-0.7dB; If so, step S305 is performed; If not, step S309 is performed;
S305, determine the input power value that power output P-1 point is corresponding on the power amplifier curve simulated;
S306, judge whether input power value that power output P-1 point is corresponding on the power amplifier curve simulated is greater than and current start to control thresholding; If so, perform step S307, if not, perform step S308;
S307, the current thresholding that starts to control is updated to the current value of starting to control after threshold gain second set point; Wherein, in the specific implementation, the second set point can be set to 0.1dB;
S308, the current thresholding that starts to control is updated to the current value of starting to control after attenuation threshold second set point; Wherein, in the specific implementation, the second set point can be set to 0.1dB;
S309, judge whether the maximum power value of current input signal is greater than and current start to control thresholding; If so, step S310 is performed; If not, step S311 is performed;
S310, the current thresholding that starts to control is updated to the current value of starting to control after threshold gain second set point; Wherein, in the specific implementation, the second set point can be set to 0.1dB;
S311, keep that current to start to control thresholding constant.
Preferably, the second set point used in above-mentioned steps S307, S308 and S310, the current relation of starting to control the difference of thresholding can be greater than according to the input power value corresponding on the power amplifier curve simulated with power output P-1 point to adjust, such as, if the second set point is less than this difference, then the second set point can be updated to this difference; Or the current relation of starting to control the difference of thresholding can be greater than according to the maximum power value with current input signal adjust, such as, if the second set point is less than this difference, then the second set point can be updated to this difference.
Preferably, upgrade in step S307, S308 and S310 current start to control thresholding after, also need to carry out digital pre-distortion DPD computing, its process is prior art, is not described in detail in this.
Particularly, the step S205 of the said method that the embodiment of the present invention provides, according to the power starting to control thresholding adjustment current input signal after renewal, can be realized by following manner:
First, determine to discharge thresholding according to starting to control thresholding; In the specific implementation, a fixed value can be deducted, such as 3000 by starting to control thresholding, obtaining discharging thresholding;
Then, the constantly pad value of adjustment current input signal, is greater than release thresholding until the pad value after Use Adjustment meets after being multiplied by current input signal and is less than the condition of starting to control thresholding, obtaining final pad value; Specific implementation process, as shown in Figure 4, can comprise the following steps:
S401, by current input signal with preset pad value be multiplied, obtain decay after current input signal; In the specific implementation, pad value can be set to-3dB;
S402, judge whether the current input signal after decaying is greater than and starts to control thresholding; If so, step S402 is performed; If not, step S403 is performed;
Upgrade after S403, fixed value that pad value decayed, such as: 0.5dB, return step S401; In the specific implementation, a pad value look-up table as shown in table 1 can be set, find corresponding pad value in table after, return step S401;
Table 1: pad value look-up table
| Actual pad value | -0.5dB | -1dB | -1.5dB | -2dB | -2.5dB | -3dB | -3.5dB | -4dB | -4.5dB | -5dB |
| Register settings | F1A | E42 | D76 | CB5 | BFF | B53 | AB1 | A18 | 987 | 8FF |
| Actual pad value | -5.5dB | -6dB | -6.5dB | -7dB | -7.5dB | -8dB | -8.5dB | -9dB | -9.5dB | -10dB |
| Register settings | 87E | 804 | 792 | 725 | 6BF | 65E | 603 | 5AD | 55C | 50F |
S404, judge decay after current input signal whether be less than release thresholding; If so, step S405 is performed; If not, step S407 is performed;
S405, judge whether the cumulative time reaches scheduled duration, such as 5ms; If so, step S406 is performed; If not, step S404 is returned;
S406, pad value is discharged fixed value after upgrade, such as: 0.5dB; Return step S404;
S407, maintenance pad value are constant, process ends.
Finally, be multiplied current input signal with final pad value the input signal after being adjusted.
Preferably, the said method that the embodiment of the present invention provides, can apply in digital optical fiber direct station and radio frequency stretch system, when the said method that the concrete enforcement embodiment of the present invention provides, step S201 ~ S204 can realize in DSP module, and step S205 can use FPGA to realize in PEAK AGC module.
Preferably, in the specific implementation, the data bits of not decaying in the data bits of decaying to input signal in DPD calculating process due to DSP module and PEAK AGC module is also inconsistent, therefore, DSP module needs will to start to control thresholding before the setting of thresholding is started to control in renewal and converts, to ensure to be consistent with the data bits in PEAK AGC module.
Based on same inventive concept, the embodiment of the present invention additionally provides device and the digital optical fiber direct station of the control of a kind of adaptive peak, the principle of dealing with problems due to this device and repeater is similar to the method that aforementioned a kind of adaptive peak controls, therefore the enforcement of this device and repeater see the enforcement of method, can repeat part and repeats no more.
The device that a kind of adaptive peak that the embodiment of the present invention provides controls, as shown in Figure 5, comprising: Digital Signal Processing DSP module 501 and peak value automatic growth control PEAK_AGC module 502; Wherein, DSP module 501, comprising: determine power output P-1 point module 5011 and determine to start to control threshold module 5012;
Determining power output P-1 point module 5011, for when receiving current input signal, determining the power output P-1 point of the power amplifier curve of current input signal; The difference of gain and the gain of power amplifier curve linear that this power output P-1 point is defined as power output on power amplifier curve equals output power value during the first set point;
Determine to start to control threshold module 5012, for determining whether the output power value that the maximum power value of current input signal is corresponding on power amplifier curve reaches power output P-1 point; If so, corresponding on power amplifier curve according to power output P-1 point input power value, upgrades and current starts to control thresholding; If not, according to the maximum power value of current input signal, upgrade and current start to control thresholding; The thresholding that starts to control after upgrading is issued to PEAK_AGC module 502;
PEAK_AGC module 502, for receive determine to start to control renewal that threshold module module 5012 issues after start to control thresholding, regulate the power of current input signal according to the thresholding that starts to control after upgrading, after making the power of the current input signal after adjusting be less than renewal, start to control thresholding.
Further, the determination power output P-1 point module 5011 in said apparatus, specifically for using the feedback signal matching power amplifier curve of current input signal and previous input signal; The gain determining power output on the power amplifier curve simulated and the difference of the power amplifier curve linear gain simulated equal output power value during set point, and the span of the first set point is-1dB ~ 0dB.
Further, threshold module 5012 is started to control in the determination in said apparatus, specifically for using the maximum power value of current input signal, generates one group of linear input power value; Using the input of linear input power value as power amplifier curve, obtain one group of corresponding output power value; The gain inequality of the gain calculating the maximum in one group of output power value and the linear gain of power amplifier curve simulated; Determine whether gain inequality is not more than the first set point.
Further, threshold module 5012 is started to control in the determination in said apparatus, specifically for when determining that gain inequality is not more than the first set point, determines the input power value that power output P-1 point is corresponding on the power amplifier curve simulated; Judge whether input power value that power output P-1 point is corresponding on the power amplifier curve simulated is greater than and current start to control thresholding; If so, the current thresholding that starts to control is updated to the current value of starting to control after threshold gain second set point; If not, the current thresholding that starts to control is updated to the current value of starting to control after attenuation threshold second set point.
Further, threshold module 5012 is started to control in the determination in said apparatus, specifically for when determining that gain inequality is greater than the first set point, judging whether the maximum power value of current input signal is greater than and current starting to control thresholding; If so, the current thresholding that starts to control is updated to the current value of starting to control after threshold gain second set point; If not, keep that current to start to control thresholding constant.
Further, the PEAK_AGC module 502 in said apparatus, specifically for determining to discharge thresholding according to starting to control thresholding; The pad value of continuous adjustment current input signal, is greater than release thresholding until the pad value after Use Adjustment meets after being multiplied by current input signal and is less than the condition of starting to control thresholding, obtaining final pad value; Be multiplied current input signal with final pad value the input signal after being adjusted.
Further, the determination power output P-1 point module 5011 in said apparatus, also for before the power output P-1 point of power amplifier curve determining current input signal, determines that the maximum power value of current input signal is greater than the peak value of setting.
The embodiment of the present invention additionally provides a kind of digital optical fiber direct station, the device that the adaptive peak that comprising the embodiment of the present invention provides controls.
Through the above description of the embodiments, those skilled in the art can be well understood to the embodiment of the present invention can by hardware implementing, and the mode that also can add necessary general hardware platform by software realizes.Based on such understanding, the technical scheme of the embodiment of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions and perform method described in each embodiment of the present invention in order to make a computer equipment (can be personal computer, server, or the network equipment etc.).
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device in embodiment can carry out being distributed in the device of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more devices being different from the present embodiment.The module of above-described embodiment can merge into a module, also can split into multiple submodule further.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
Method, device and digital optical fiber direct station that a kind of adaptive peak that the embodiment of the present invention provides controls, when receiving current input signal, after determining the power output P-1 point of the power amplifier curve of current input signal, determine whether the output power value that the maximum power value of current input signal is corresponding on power amplifier curve reaches power output P-1 point; If so, corresponding on power amplifier curve according to power output P-1 point input power value, upgrades and current starts to control thresholding; If not, according to the maximum power value of current input signal, upgrade and current start to control thresholding; According to the power starting to control thresholding adjustment current input signal after renewal.Owing to carrying out dynamic conditioning according to the power output P-1 point of current input signal or the maximum power value of current input signal to starting to control thresholding, and use the thresholding that starts to control after dynamic conditioning to regulate current input signal, make the current input signal after adjusting when power amplification, power output P-1 point can not entered, cause on the basis of digital pre-distortion, can ensure to export maximum power, thus improve overall power amplification efficiency.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (15)
1. a method for adaptive peak control, is characterized in that, comprising:
When receiving current input signal, determine the power output P-1 point of the power amplifier curve of described current input signal; The difference of gain and the gain of described power amplifier curve linear that described power output P-1 point is defined as power output on power amplifier curve equals output power value during the first set point; The span of described first set point is-1dB ~ 0dB;
Determine whether the output power value that the maximum power value of described current input signal is corresponding on power amplifier curve reaches power output P-1 point; If so, corresponding on described power amplifier curve according to power output P-1 point input power value, upgrades and current starts to control thresholding; If not, according to the maximum power value of described current input signal, upgrade and current start to control thresholding;
According to starting to control the power that thresholding regulates described current input signal after upgrading, after making the power of current input signal after adjusting be less than described renewal, start to control thresholding.
2. the method for claim 1, is characterized in that, determines the power output P-1 point of the power amplifier curve of described current input signal, specifically comprises:
Use the feedback signal matching power amplifier curve of described current input signal and previous input signal;
Determine the output power value when gain of power output on the power amplifier curve simulated and the difference of the described power amplifier curve linear gain simulated equal set point.
3. method as claimed in claim 2, is characterized in that, determines whether the power output of the maximum power of described current input signal correspondence on power amplifier curve reaches power output P-1 point, specifically comprises:
Use the maximum power value of described current input signal, generate one group of linear input power value;
Using the input of described linear input power value as power amplifier curve, obtain one group of corresponding output power value;
Calculate the gain inequality of the gain of the maximum in described one group of output power value and the linear gain of the described power amplifier curve simulated;
Determine whether described gain inequality is not more than described first set point.
4. method as claimed in claim 3, is characterized in that, according to the input power value of power output P-1 point correspondence on described power amplifier curve, upgrades and current starts to control thresholding, specifically comprise:
Determine the input power value that described power output P-1 point is corresponding on the described power amplifier curve simulated;
Judge whether input power value that described power output P-1 point is corresponding on the described power amplifier curve simulated is greater than and current start to control thresholding;
If so, the current thresholding that starts to control is updated to the current value of starting to control after threshold gain second set point;
If not, the current thresholding that starts to control is updated to the current value of starting to control after attenuation threshold second set point.
5. method as claimed in claim 3, is characterized in that, according to the maximum power value of described current input signal, upgrades and current starts to control thresholding, specifically comprise:
Judge whether the maximum power value of described current input signal is greater than and current start to control thresholding;
If so, the current thresholding that starts to control is updated to the current value of starting to control after threshold gain second set point;
If not, keep that current to start to control thresholding constant.
6. as the method that right profit requires as described in any one of 1-5, it is characterized in that, according to starting to control the power that thresholding regulates described current input signal after upgrading, specifically comprising:
Determine to discharge thresholding according to the described thresholding that starts to control;
The pad value of the described current input signal of continuous adjustment, until the pad value after Use Adjustment meets after being multiplied by current input signal be greater than described release thresholding and the condition of starting to control thresholding described in being less than, obtains final pad value;
Be multiplied current input signal with described final pad value the input signal after being adjusted.
7. the method as described in any one of claim 1-5, is characterized in that, before the power output P-1 point of power amplifier curve determining described current input signal, also comprises:
When judging that the maximum power value of current input signal is greater than the peak value of setting, turn to the operation of the power output P-1 point of the power amplifier curve determining described current input signal.
8. a device for adaptive peak control, is characterized in that, comprising: Digital Signal Processing DSP module and peak value automatic growth control PEAK_AGC module;
Described DSP module, comprising: determine power output P-1 point module and determine to start to control threshold module;
Describedly determining power output P-1 point module, for when receiving current input signal, determining the power output P-1 point of the power amplifier curve of described current input signal; The difference of gain and the gain of described power amplifier curve linear that described power output P-1 point is defined as power output on power amplifier curve equals output power value during the first set point; The span of described first set point is-1dB ~ 0dB;
Describedly determine to start to control threshold module, for determining whether the output power value that the maximum power value of described current input signal is corresponding on power amplifier curve reaches power output P-1 point; If so, corresponding on described power amplifier curve according to power output P-1 point input power value, upgrades and current starts to control thresholding; If not, according to the maximum power value of described current input signal, upgrade and current start to control thresholding; The thresholding that starts to control after upgrading is issued to described PEAK_AGC module;
Described PEAK_AGC module, for receive described determine to start to control the renewal that threshold module module issues after start to control thresholding, according to starting to control the power that thresholding regulates described current input signal after upgrading, after making the power of current input signal after adjusting be less than described renewal, start to control thresholding.
9. device as claimed in claim 8, is characterized in that, describedly determines power output P-1 point module, specifically for using the feedback signal matching power amplifier curve of described current input signal and previous input signal; Determine the output power value when gain of power output on the power amplifier curve simulated and the difference of the described power amplifier curve linear gain simulated equal set point.
10. device as claimed in claim 9, is characterized in that, describedly determines to start to control threshold module, specifically for using the maximum power value of described current input signal, generates one group of linear input power value; Using the input of described linear input power value as power amplifier curve, obtain one group of corresponding output power value; Calculate the gain inequality of the gain of the maximum in described one group of output power value and the linear gain of the described power amplifier curve simulated; Determine whether described gain inequality is not more than described first set point.
11. devices as claimed in claim 10, it is characterized in that, describedly determining to start to control threshold module, specifically for when determining that described gain inequality is not more than described first set point, determining the input power value that described power output P-1 point is corresponding on the described power amplifier curve simulated; Judge whether input power value that described power output P-1 point is corresponding on the described power amplifier curve simulated is greater than and current start to control thresholding; If so, the current thresholding that starts to control is updated to the current value of starting to control after threshold gain second set point; If not, the current thresholding that starts to control is updated to the current value of starting to control after attenuation threshold second set point.
12. devices as claimed in claim 10, is characterized in that, describedly determine to start to control threshold module, specifically for when determining that described gain inequality is greater than described first set point, judging whether the maximum power value of described current input signal is greater than and current starting to control thresholding; If so, the current thresholding that starts to control is updated to the current value of starting to control after threshold gain second set point; If not, keep that current to start to control thresholding constant.
13. devices as described in any one of claim 8-12, is characterized in that, described PEAK_AGC module, determine to discharge thresholding specifically for starting to control thresholding described in basis; The pad value of the described current input signal of continuous adjustment, until the pad value after Use Adjustment meets after being multiplied by current input signal be greater than described release thresholding and the condition of starting to control thresholding described in being less than, obtains final pad value; Be multiplied current input signal with described final pad value the input signal after being adjusted.
14. devices as described in any one of claim 8-12, it is characterized in that, describedly determine power output P-1 point module, also for before the power output P-1 point of power amplifier curve determining described current input signal, determine that the maximum power value of current input signal is greater than the peak value of setting.
15. 1 kinds of digital optical fiber direct stations, is characterized in that, comprise the device that adaptive peak controls as described in any one of claim 8-14.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210028107.8A CN103248428B (en) | 2012-02-09 | 2012-02-09 | A kind of method that adaptive peak controls, device and digital optical fiber direct station |
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| CN201210028107.8A CN103248428B (en) | 2012-02-09 | 2012-02-09 | A kind of method that adaptive peak controls, device and digital optical fiber direct station |
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| CN103248428A CN103248428A (en) | 2013-08-14 |
| CN103248428B true CN103248428B (en) | 2015-08-05 |
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Citations (5)
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|---|---|---|---|---|
| EP0848495A2 (en) * | 1996-12-11 | 1998-06-17 | Fujitsu Limited | Signal amplifier circuit |
| US6438184B1 (en) * | 1999-01-12 | 2002-08-20 | Sunnyvale Micro Devices, Inc. | Apparatus and method for adjusting an input gain and comparator threshold value within an access identifier interval on a telephone line medium |
| CN101316122A (en) * | 2007-05-31 | 2008-12-03 | 大唐移动通信设备有限公司 | Automatic gain control method and apparatus thereof |
| CN101640516A (en) * | 2009-08-21 | 2010-02-03 | 京信通信系统（中国）有限公司 | Digital predistortion power amplifier and signal processing method thereof |
| CN102150362A (en) * | 2008-08-11 | 2011-08-10 | 高通股份有限公司 | Adaptive digital predistortion of complex modulated waveform using peak and RMS voltage feedback from the output of a power amplifier |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0848495A2 (en) * | 1996-12-11 | 1998-06-17 | Fujitsu Limited | Signal amplifier circuit |
| US6438184B1 (en) * | 1999-01-12 | 2002-08-20 | Sunnyvale Micro Devices, Inc. | Apparatus and method for adjusting an input gain and comparator threshold value within an access identifier interval on a telephone line medium |
| CN101316122A (en) * | 2007-05-31 | 2008-12-03 | 大唐移动通信设备有限公司 | Automatic gain control method and apparatus thereof |
| CN102150362A (en) * | 2008-08-11 | 2011-08-10 | 高通股份有限公司 | Adaptive digital predistortion of complex modulated waveform using peak and RMS voltage feedback from the output of a power amplifier |
| CN101640516A (en) * | 2009-08-21 | 2010-02-03 | 京信通信系统（中国）有限公司 | Digital predistortion power amplifier and signal processing method thereof |
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