CN101136675A - Power backspacing based power calibrating method and apparatus - Google Patents
Power backspacing based power calibrating method and apparatus Download PDFInfo
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- CN101136675A CN101136675A CNA2007101124618A CN200710112461A CN101136675A CN 101136675 A CN101136675 A CN 101136675A CN A2007101124618 A CNA2007101124618 A CN A2007101124618A CN 200710112461 A CN200710112461 A CN 200710112461A CN 101136675 A CN101136675 A CN 101136675A
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Abstract
This invention discloses a power scaling method based on backspace of power including: backspacing the output power of a scaling signal source and expected scaling power, in which, the backspace volume of the output power is the same with that of the expected scaling power, 2, carrying out power scaling based on the backspaced power of the signal resource and the expected scaling power to get actual scaling power, 3, increasing the actual scaling power, and the volume of which is equal to the backspace volume. This invention also discloses a power scaling device.
Description
Technical field
The present invention relates to the communications field, and especially, relate to a kind of power calibration method and apparatus based on back-off.
Background technology
Usually said auto-scaling is exactly the performance number of base station system according to the backstage setting, adjusts the gain setting of forward link automatically, makes it reach default sector transmission power, and this is that opening base station, covering are adjusted, the utility function of the network planning.
At application number is in the patent application of 200410065931.6 (publication number is CN1798122A), discloses the method and apparatus that a kind of multicarrier system realizes auto-scaling, has introduced a kind of scheme of auto-scaling.In this invention, automatic calibration device comprises that multiplier unit, Digital Up Convert processing unit, D/A converting unit, radio frequency send processing unit TX unit, power amplification PA unit, power monitoring unit and calibration gain controller unit.The auto-scaling process comprises that auto-scaling begins, the backstage sends the auto-scaling parameter to the calibration gain controller, start the gross power calibration, the total power value predetermined up to gross power numerical value and base station equates in the scope that error allows, start the auto-scaling of single carrier wave, performance number up to the predetermined single carrier wave in the magnitude of power of all single carrier waves and base station equates in the scope that error allows, and stops auto-scaling.Such scheme has been realized the flexible automatic calibration of multicarrier, has save unnecessary based on feedback link, has saved the cost of system, has improved the adaptability of system in the applied environment of complexity.
In this scheme, the output of rate-aided signal source full power, by continuous adjustment yield value, finally making power output reach scaled power is target power.But because scaling algorithm, gain is in course of adjustment and has inevitable oscillatory occurences, if scaled power also is a full power, will make the output of power amplifier when calibration meet or exceed the power of rated power.
This will bring two problems: (1) is higher to the performance requirement of power amplifier, need the power amplifier still can operate as normal in exceeding the certain limit of rated power, and for the dissatisfactory power amplifier of performance, danger with regard to existing power amplifier to be turned off in calibration process because of power output is excessive, and then cause the calibration failure; (2) though the good power amplifier of performance can be in exceeding the certain limit of rated power operate as normal, but still might be when calibration because the power of adjusting is excessive, and exceed the Maximum tolerance of power amplifier, cause power amplifier to turn-off and the calibration failure.In a word, under power amplifier full power situation, calibrate, increased the unreliability and the unsteadiness of calibration.
Yet, the solution to this problem is not proposed at present as yet.
Summary of the invention
Consider the problems referred to above and make the present invention that for this reason, main purpose of the present invention is to provide a kind of power calibration mechanism based on back-off.
According to embodiments of the invention, provide a kind of power calibration method based on back-off.
This method comprises: step S102, the power output and the expectation scaled power in rate-aided signal source are carried out rollback, and wherein, the rollback amount of the power output in rate-aided signal source is identical with the rollback amount of expectation scaled power; Step S104 carries out the power calibration processing based on signal source power behind the rollback and the expectation scaled power behind the rollback, obtains actual scaled power; And step S106, increase actual scaled power, wherein, the recruitment of actual scaled power equals the rollback amount.
Wherein, in step S102, the rollback amount is 3dB.
In step S104, carry out power calibration in common mode and handle.
In addition, in step S106, increase the total power value and the carrier power of actual scaled power respectively, recruitment equals above-mentioned rollback amount.
According to another embodiment of the present invention, provide a kind of power calibration device based on back-off.
This device comprises: the back-off module, be used for the power output in rate-aided signal source is carried out rollback with the expectation scaled power, and wherein, the rollback amount of the power output in rate-aided signal source is identical with the rollback amount of expectation scaled power;
The power calibration processing module is used for carrying out the power calibration processing based on signal source power behind the rollback and the expectation scaled power behind the rollback, obtains actual scaled power; And
Power increases module, is used to increase actual scaled power, and the recruitment of actual scaled power equals the power output in rate-aided signal source and the rollback amount of expectation scaled power.
Wherein, in the back-off module, the power output in rate-aided signal source is 3dB with the rollback amount of expectation scaled power.
The power calibration processing module is carried out power calibration in common mode and is handled.
In addition, power increases total power value and the carrier power that module increases actual scaled power respectively, and recruitment equals above-mentioned rollback amount.
By technique scheme of the present invention, can improve the reliability and stability of calibration guaranteeing to avoid power amplifier to cause the phenomenon that is turned off because of power output is excessive under the situation that the calibration accuracy does not descend.
Description of drawings
Fig. 1 is the flow chart based on the calibrating method of back-off according to the inventive method embodiment;
Fig. 2 can utilize to carry out the block diagram of the device of power calibration according to the inventive method embodiment based on the calibrating method of back-off; And
Fig. 3 is the block diagram based on the robot scaling equipment of back-off according to apparatus of the present invention embodiment.
Embodiment
Method embodiment
In the present embodiment, provide a kind of power calibration method based on back-off.
As shown in Figure 1, the power calibration method based on back-off according to present embodiment comprises: step S102, the power output in rate-aided signal source is carried out rollback with the expectation scaled power, and wherein, the rollback amount of the power output in rate-aided signal source is identical with the rollback amount of expectation scaled power; Step S104 carries out the power calibration processing based on signal source power behind the rollback and the expectation scaled power behind the rollback, obtains actual scaled power; And step S106, increase actual scaled power, wherein, the recruitment of actual scaled power equals the rollback amount.
In step S102, the power output in rate-aided signal source can have multiple choices with the rollback amount of expectation scaled power, but consider the problems such as accuracy of calibration, preferably, the rollback amount is chosen as 3dB, and the effect that is equal to it is that the power output in rate-aided signal source and expectation scaled power are reduced half.
With reference to Fig. 2, suppose that the full power power output of signal source is Win, the yield value after calibrating successfully is K, and the multiplication factor of power amplifier (PA) is represented with P, and the power output of PA end is Wout, at this moment, Wout reaches the power output size of appointment, and the pass between Wout and the Win is:
Wout＝Win×K×P
Through after the above-mentioned rollback, be equivalent to both sides at equation divided by 2, can obtain:
Wout/2＝Win/2×K×P
Then, when calibration is handled, read current power amplifier power output, if this power less than new scaled power, is then transferred the value of big gain K; If this power, is then turned the value of gain K down greater than new scaled power; Final by adjusting repeatedly, make the difference of power output and new scaled power of power amplifier PA within a very little scope, promptly calibrate and finish.
In addition, in step S106, increase the total power value and the carrier power of actual scaled power respectively, recruitment equals above-mentioned rollback amount, and last result is reported the external world.
Usual method in step S104 can have multiple choices.For example, can be that application number is a disclosed automatic marking method in the patent application of 200410065931.6 (publication number is CN1798122A).This method may further comprise the steps:
Step (1), auto-scaling begins;
Step (2) is provided with the parameter of auto-scaling;
Step (3) starts the gross power auto-scaling;
Step (4), the total power value of readout power monitoring unit;
Step (5), the total power value that the numerical value and the base station of step (4) are scheduled to compares, if the numerical value of step (4) equals the predetermined total power value in base station, then execution in step (8); If the numerical value of step (4) is less than the predetermined total power value in base station, then execution in step (6); If the numerical value of step (4) is greater than the predetermined total power value in base station, then execution in step (7);
Step (6), according to the numerical value of step-length increase TX unit attenuation controller, circulation step (4), (5) are up to execution in step (8);
Step (7), according to the numerical value of step-length reduction TX unit attenuation controller, circulation step (4), (5) are up to execution in step (8);
Step (8) starts the auto-scaling of single carrier wave;
Step (9), the numerical value of the power of the single carrier wave of readout power monitoring;
Step (10), the performance number of the single carrier wave that the numerical value of step (9) and base station is predetermined compares, if the numerical value of step (9) equals the performance number of the predetermined single carrier wave in base station, then execution in step (13); If the numerical value of step (9) is less than the performance number of the predetermined single carrier wave in base station, then execution in step (11); If the numerical value of step (9) is greater than the performance number of the predetermined single carrier wave in base station, then execution in step (12);
Step (11), according to the numerical value of step-length increase multiplier, circulation execution in step (9), (10) are up to execution in step (13);
Step (12), according to the numerical value of step-length reduction multiplier, circulation execution in step (9), (10) are up to execution in step (13);
Step (13) judges whether that all carrier waves have all finished auto-scaling, if the judgment is No, then is circulated back to step (8) and begins to carry out; If the judgment is Yes, execution in step (14) then;
Step (14), the customization auto-scaling.
Device embodiment
In the present embodiment, provide a kind of power calibration device 300 based on back-off.
As shown in Figure 3, the power calibration device 300 based on back-off according to present embodiment comprises: back-off module 302, be used for the power output in rate-aided signal source is carried out rollback with the expectation scaled power, wherein, the rollback amount of the power output in rate-aided signal source is identical with the rollback amount of expectation scaled power;
Power calibration processing module 304 is used for carrying out the power calibration processing based on signal source power behind the rollback and the expectation scaled power behind the rollback, obtains actual scaled power; And
Power increases module 306, is used to increase actual scaled power, and the recruitment of actual scaled power equals the power output in rate-aided signal source and the rollback amount of expectation scaled power.
Equally, consider factor such as calibration accuracy etc., in back-off module 302, the power output in rate-aided signal source is set to 3dB with the rollback amount of expectation scaled power,, the power output and the expectation scaled power in rate-aided signal source is reduced half that is.
In addition, power increases total power value and the carrier power that module 306 increases actual scaled power respectively, and recruitment equals above-mentioned rollback amount.
Power calibration processing module 304 is carried out power calibration in common mode and is handled.For example, it is the structure of the automatic calibration device described in the patent of 200410065931.6 (publication number is CN 1798122A) that power calibration processing module 304 can adopt application number, comprising: multiplier unit, Digital Up Convert processing unit, D/A converting unit, radio frequency send processing unit TX unit, power amplification PA unit, power monitoring unit and calibration gain controller unit.The calibration treatment step of its execution can no longer repeat here with reference to described step (1) before to (14).
In sum, the present invention is by adopting the calibration mode of back-off, make the power output of power amplifier in whole calibration adjustment process, be in about half of rated power all the time, make it can not reach rated power, more can not exceed rated power, therefore avoid power amplifier to cause the phenomenon that is turned off because of power output is excessive, improved the reliability and stability of calibration, and can keep the identical calibration precision of calibrating method with the full power calibration.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the power calibration method based on back-off is characterized in that, comprising:
Step S102 carries out rollback with the power output and the expectation scaled power in rate-aided signal source, and wherein, the rollback amount of the power output in described rate-aided signal source is identical with the rollback amount of described expectation scaled power;
Step S104 carries out the power calibration processing based on signal source power behind the rollback and the expectation scaled power behind the rollback, obtains actual scaled power; And
Step S106 increases described actual scaled power, and wherein, the recruitment of described actual scaled power equals described rollback amount.
2. the power calibration method based on back-off according to claim 1 is characterized in that, in described step S102, described rollback amount is 3dB.
3. the power calibration method based on back-off according to claim 1 is characterized in that, in described step S104, carries out described power calibration in common mode and handles.
4. the power calibration method based on back-off according to claim 1 is characterized in that, in described step S106, increases the total power value and the carrier power of described actual scaled power respectively, and recruitment equals described rollback amount.
5. the power calibration device based on back-off is characterized in that, comprising:
The back-off module is used for the power output in rate-aided signal source is carried out rollback with the expectation scaled power, and wherein, the rollback amount of the power output in described rate-aided signal source is identical with the rollback amount of described expectation scaled power;
The power calibration processing module is used for carrying out the power calibration processing based on signal source power behind the rollback and the expectation scaled power behind the rollback, obtains actual scaled power; And
Power increases module, is used to increase described actual scaled power, and the recruitment of described actual scaled power equals the power output in described rate-aided signal source and the described rollback amount of described expectation scaled power.
6. the power calibration device based on back-off according to claim 5 is characterized in that, in described back-off module, the described rollback amount of the power output in described rate-aided signal source and described expectation scaled power is 3dB.
7. the power calibration device based on back-off according to claim 5 is characterized in that, described power calibration processing module is carried out described power calibration in common mode and handled.
8. the power calibration device based on back-off according to claim 5 is characterized in that, described power increases total power value and the carrier power that module increases described actual scaled power respectively, and recruitment equals described rollback amount.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101124618A CN101136675B (en) | 2007-06-26 | 2007-06-26 | Power backspacing based power calibrating method and apparatus |
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| CN2007101124618A CN101136675B (en) | 2007-06-26 | 2007-06-26 | Power backspacing based power calibrating method and apparatus |
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| CN101136675A true CN101136675A (en) | 2008-03-05 |
| CN101136675B CN101136675B (en) | 2011-03-02 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103270799A (en) * | 2010-12-30 | 2013-08-28 | 瑞典爱立信有限公司 | Methods and apparatuses for enabling power back-ff indication in phr in a telecommunications system |
| CN101741479B (en) * | 2008-11-04 | 2014-03-12 | 中兴通讯股份有限公司 | Joint test method for maximum power regression and adjacent channel leakage ratio |
| CN105191447A (en) * | 2012-10-01 | 2015-12-23 | 美国博通公司 | Apparatus, methods and computer programs for signalling transmitted output power |
| WO2017121125A1 (en) * | 2016-01-14 | 2017-07-20 | 中兴通讯股份有限公司 | Link calibration method and apparatus, and radio-frequency feed-in system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6535723B1 (en) * | 1999-03-15 | 2003-03-18 | Lucent Technologies Inc. | Method of power control for a wireless communication system having multiple information rates |
| CN1148911C (en) * | 2001-06-27 | 2004-05-05 | 华为技术有限公司 | Speed control method by dynamic regulation of threshold for CDMA system |
| US7453945B2 (en) * | 2003-09-05 | 2008-11-18 | Lucent Technologies Inc. | Methods and devices for controlling RF, multi-carrier amplifier signal power |
| EP1830482B1 (en) * | 2004-12-02 | 2017-01-25 | ZTE Corporation | Method to adjust forward transmission power control threshold in mobile communication system |
| US20060229025A1 (en) * | 2005-03-30 | 2006-10-12 | Lucent Technologies Inc. | Method for extracting optimal reverse link capacity by scaling reverse link Eb/No setpoint based on aggregate channel load and condition |
| CN100396128C (en) * | 2006-05-16 | 2008-06-18 | 东南大学 | Multi-mode digital linearization device and method |
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2007
- 2007-06-26 CN CN2007101124618A patent/CN101136675B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101741479B (en) * | 2008-11-04 | 2014-03-12 | 中兴通讯股份有限公司 | Joint test method for maximum power regression and adjacent channel leakage ratio |
| CN103270799A (en) * | 2010-12-30 | 2013-08-28 | 瑞典爱立信有限公司 | Methods and apparatuses for enabling power back-ff indication in phr in a telecommunications system |
| CN103270799B (en) * | 2010-12-30 | 2016-07-06 | 瑞典爱立信有限公司 | For allowing the method and apparatus of back-off instruction in PHR in the telecommunication system |
| CN105191447A (en) * | 2012-10-01 | 2015-12-23 | 美国博通公司 | Apparatus, methods and computer programs for signalling transmitted output power |
| WO2017121125A1 (en) * | 2016-01-14 | 2017-07-20 | 中兴通讯股份有限公司 | Link calibration method and apparatus, and radio-frequency feed-in system |
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| CN101136675B (en) | 2011-03-02 |
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