CN103379534B - Power detecting method and system when being calibrated for terminal relative power - Google Patents
Power detecting method and system when being calibrated for terminal relative power Download PDFInfo
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- CN103379534B CN103379534B CN201210109450.5A CN201210109450A CN103379534B CN 103379534 B CN103379534 B CN 103379534B CN 201210109450 A CN201210109450 A CN 201210109450A CN 103379534 B CN103379534 B CN 103379534B
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- power
- performance number
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- relative power
- terminal relative
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Abstract
The invention provides power detecting method during a kind of calibration for terminal relative power and system, to needing two original power values for performing relative power calibration to carry out same performance number raising processing, due to having carried out performance number raising, so that the signal to noise ratio of signal is improved, the performance number error thus detected will also diminish.Simultaneously, it is to carry out relative power calibration in view of this, it is desirable that the difference of performance number, in the case of to needing two original power values for performing relative power calibration to carry out same performance number raising processing, the difference of performance number will be constant, so that the reliability of the relative power calibration carried out with the difference of the performance number can also be guaranteed.
Description
Technical field
The present invention relates to mobile communication technology field, power inspection during more particularly to a kind of calibration for terminal relative power
Survey method and system.
Background technology
Till now, userbase is expanding rapidly TD-SCDMA (abbreviation TD) terminal, and the shipment of all big enterprises is measured
The growth of existing explosion type.3GPP and professional standard have strict regulation, therefore, had in producing line to the transmission power of TD terminals
The calibration of transmission power is carried out to each station terminal.Wherein, a kind of calibration is relative power calibration, is to allow the power of terminal
Good stepped intervals characteristic, i.e., good relative power control accuracy, so as to preferably meet as defined in specification is presented in control
Closed-loop power control 1dB requirement.When the requirement terminal power that sends instructions under such as network changes 1dB, the actual power change of terminal should
Should be in the range of 0.5~1.5dB, it is impossible to excessive error occur.3GPP is clearly required to closed-loop power control precision, such as table 1
It is shown：
Table 1
In the prior art, when carrying out relative power calibration, power test is carried out first.Specifically, terminal sends APC
VGA inside (Automatic Power Control, automated power control) control word, APC control words configuration radio frequency chip
The gain of (variable gain amplifier), to export corresponding performance number, then passes through detection device (such as comprehensive test instrument, frequency spectrograph
Deng) detect the power that is actually obtained under the APC control words.
For example, three VGA (being respectively VGA3, VGA2, VGA1) are configured with inside radio frequency chip, wherein, each shelves of VGA3
Change in gain is 20dB, and each grade of change in gain of VGA2 is 5dB, and each grade of change in gain of VGA1 is 0.1dB.What terminal was sent
The power of APC control words is -50dBm, and radio frequency chip configures -50dBm power by VGA, recycles detection device detection should
The power actually obtained under APC control words.
Because terminal is under small-power, the signal to noise ratio of the TD signals issued is not high, and Gauss white noise is typically presented in noise
(AWGN) characteristic.It is demonstrated experimentally that this can cause the power that terminal is sent within the short time measured (such as during TD mono-
The length of gap) there is certain uncertainty.And many terminals use the TD power amplifiers of one pass gain now, gain typically exists
30dB or so, in order to obtain -50dBm or so small-power in antenna opening, the power of radio frequency sending set output can be very low, only -
80dBm or so, now signal to noise ratio is often in 8~12dB or so.Experimental data shows, when signal to noise ratio is 8dB, to same
The measurement of APC control words is multiple, the maximum and minimum value difference measured up to as many as 0.3dB, measurement result substantially can-
Fluctuated between 49.85~-50.15dBm.
Furthermore, if the bottom of making an uproar of detection device itself is poor, can also influence power measurements during calibration.Such as comprehensive test instrument
When bottom of making an uproar in TD 1.28MHz channel widths is -60dBm, the power of two APC control words that terminal is sent is -
49dBm, -50dBm, then the performance number measured is make an uproar bottom sum of the signal with comprehensive test instrument in itself, is respectively：- 48.668dBm ,-
49.586dBm.From measurement result, both relative powers have reformed into 0.918dB, and are actually 1dB, draw here
No small error is entered.
It is inaccurate due to obtained performance number when carrying out relative power calibration using the above-mentioned performance number that detects,
Thus the relative power calibration carried out is also just inaccurate.Therefore, when carrying out the calibration of terminal relative power, how power is carried out
Detection, obtains accurate performance number into a urgent problem to be solved.
The content of the invention
It is an object of the invention to provide it is a kind of for terminal relative power calibrate when power detecting method and system, with
The performance number for solving to obtain in the prior art is inaccurate, so as to cause the problem of relative power calibration is inaccurate.
In order to solve the above technical problems, the present invention provides a kind of power detection side when being calibrated for terminal relative power
Method, including：
To needing two original power values for performing relative power calibration to carry out same performance number raising processing；
Two performance numbers after improving are detected using detection device, the difference of two detected performance numbers is obtained.
Optionally, it is used in described in power detecting method when terminal relative power is calibrated, carries out performance number raising
Two original power values of processing are respectively less than or equal to -10dBm.
Optionally, it is used in described in power detecting method when terminal relative power is calibrated, carries out performance number raising
Performance number increase rate in processing is 10dB~40dB.
Optionally, it is used in described in power detecting method when terminal relative power is calibrated, utilizes same VGA pairs
Two original power values carry out same performance number raising processing.
Optionally, it is used in described in power detecting method when terminal relative power is calibrated, using a VGA to two
Individual original power value carries out same performance number raising processing.
Optionally, it is used in described in power detecting method when terminal relative power is calibrated, comprehensive test instrument or frequency spectrograph.
The present invention also provides a kind of power detecting system when being calibrated for terminal relative power, including：
First processing equipment, to carry out same power to two original power values for needing to perform relative power calibration
It is worth raising processing；
Second processing equipment, to detect two performance numbers after improving using detection device, obtains detected two
The difference of performance number.
Optionally, it is used in described in power detecting system when terminal relative power is calibrated, carries out performance number raising
Two original power values of processing are respectively less than or equal to -10dBm.
Optionally, it is used in described in power detecting system when terminal relative power is calibrated, carries out performance number raising
Performance number increase rate in processing is 10dB~40dB.
Optionally, it is used in described in power detecting system when terminal relative power is calibrated, utilizes same VGA pairs
Two original power values carry out same performance number raising processing.
Optionally, it is used in described in power detecting system when terminal relative power is calibrated, using a VGA to two
Individual original power value carries out same performance number raising processing.
Optionally, it is used in described in power detecting system when terminal relative power is calibrated, the detection device bag
Include：Comprehensive test instrument or frequency spectrograph.
In power detecting method and system when being calibrated provided by the present invention for terminal relative power, to needing to perform
Two original power values of relative power calibration carry out same performance number raising processing, due to having carried out performance number raising, make
The signal to noise ratio for obtaining signal is improved, and the performance number error thus detected will also diminish.Simultaneously, it is contemplated that this is to carry out
Relative power is calibrated, it is desirable that the difference of performance number, is entered in two original power values to needing to perform relative power calibration
In the case of the same performance number raising processing of row, the difference of performance number will be constant, so as to be carried out with the difference of the performance number
Relative power calibration reliability can also be guaranteed.
Brief description of the drawings
Fig. 1 is the schematic flow sheet for being used for power detecting method when terminal relative power is calibrated of the embodiment of the present invention；
Fig. 2 is the module diagram for being used for power detecting system when terminal relative power is calibrated of the embodiment of the present invention.
Embodiment
Power inspection during below in conjunction with the drawings and specific embodiments to being calibrated provided by the present invention for terminal relative power
Method and system are surveyed to be described in further detail.According to following explanation and claims, advantages and features of the invention will more
It is clear.It should be noted that, accompanying drawing using very simplified form, is only implemented conveniently, lucidly to aid in illustrating the present invention
The purpose of example.
The present invention core concept be, carry out relative power calibration when, for the detection of power, and be not concerned with for
The degree of accuracy of the detection of each power, but concern is for the degree of accuracy of the difference detection of two power.Due to carrying out relative work(
When rate is calibrated, the foundation of calibration is power difference, as long as ensure that the accuracy of power difference, and it is accurate that relative power is calibrated
Property just can also be guaranteed.Here, breaching the pattern for the accurate measurements for obtaining each power in conventional thought as far as possible.
Fig. 1 is refer to, it is the stream for being used for power detecting method when terminal relative power is calibrated of the embodiment of the present invention
Journey schematic diagram.As shown in figure 1, shown power detecting method includes：
S10：To needing two original power values for performing relative power calibration to carry out same performance number raising processing；
S11：Two performance numbers after detection device detection raising, obtain the difference of two detected performance numbers.
Accordingly, the present embodiment additionally provide it is a kind of for terminal relative power calibrate when power detecting system.Such as Fig. 2
Shown, it is the module diagram for being used for power detecting system when terminal relative power is calibrated of the embodiment of the present invention.It is shown
Power detecting system includes：
First processing equipment 20, to carry out same work(to two original power values for needing to perform relative power calibration
The raising of rate value is handled；
Second processing equipment 21, to detect two performance numbers after improving using detection device, obtains detected two
The difference of individual performance number.
Due to having carried out performance number raising to two original power values for needing to perform relative power calibration so that signal
Signal to noise ratio is improved, and the performance number error thus detected will also diminish.Simultaneously, it is contemplated that this is to carry out relative power
Calibration, it is desirable that the difference of performance number, is carried out equally in two original power values to needing to perform relative power calibration
In the case that performance number raising is handled, the difference of performance number will be constant, so that the relative work(carried out with the difference of the performance number
The reliability of rate calibration can also be guaranteed.
In view of terminal under small-power, the signal to noise ratio of the TD signals issued is not high, and Gauss white noise is typically presented in noise
(AWGN) characteristic, causes the power that terminal is sent (such as length of mono- time slot of TD) within the short time measured to have one
Fixed uncertainty.It is preferred that, carry out performance number and improve two original power values of processing respectively less than equal to -10dBm.Further
, it is 10dB~40dB to carry out the performance number increase rate in performance number raising processing.
In the present embodiment, the detection device includes：Comprehensive test instrument or frequency spectrograph.For example, it is desired to perform relative power school
Two accurate original power values are -49dBm and -50dBm, after the first processing equipment 20 execution step S10, are respectively increased
To -29dBm and -30dBm, that is, 20dB performance number raising processing is carried out.Now both performance numbers are by repeatedly measuring
To fluctuation range be respectively：- 28.98~-29.02dBm, -29.98~-30.02dBm.Size is fluctuated from original pact
0.3dB (referring to the measurement carried out in background technology for -50dBm) is reduced to 0.04dB, and effect is clearly.
In addition, for the difference degree of accuracy degree of improvement also clearly.If comprehensive test instrument is in TD 1.28MHz channel widths
Bottom of making an uproar when being -60dBm, the power for two APC control words that terminal is sent is -49dBm, -50dBm, then the power measured
Value is make an uproar bottom sum of the signal with comprehensive test instrument in itself, is respectively：- 48.668dBm, -49.586dBm.Both relative powers are just
Become 0.918dB, 0.082dB error is introduced here.And by enhancing after beneficial 20dB temporarily, two APC control words
Power is -29dBm, -30dBm, then the bottom sum of making an uproar of the performance number or signal measured with comprehensive test instrument in itself, is respectively：-
28.997dBm, -29.996dBm.Both relative powers have reformed into 0.999dB, and error falls below rapidly 0.001dB, effect
Highly significant.
It is bigger compared to using error when carrying out relative power calibration using the 0.9999dB closer to actual value
0.918dB carries out relative power calibration will be more accurate, so that the relative power calibration carried out with the difference of the performance number
Reliability can also be guaranteed.It should be noted that, carry out relative power using the difference of performance number and be calibrated to prior art, this Shen
It please repeat no more.Application concerns are the accurate foundations for obtaining a progress relative power calibration.
In the present embodiment, same performance number raising is carried out to two original power values using same VGA to handle.It is excellent
Choosing, same performance number raising is carried out to two original power values using a VGA and handled.
For example, it is desired to improve gain 20dB to two original power values, then using a VGA3 (with institute in background technology
Exemplified by each grade of change 20dB improved VGA3) carry out one grade of adjustment.It is of course also possible to utilize such as each grade change
10dB VGA is adjusted by two grades of change.The application is not limited thereto.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to the protection of claims
Scope.
Claims (12)
1. power detecting method during a kind of calibration for terminal relative power, it is characterised in that including：
To needing two original power values for performing relative power calibration to carry out same performance number raising processing；
Two performance numbers after improving are detected using detection device, the difference of two detected performance numbers is obtained.
2. power detecting method when being calibrated as claimed in claim 1 for terminal relative power, it is characterised in that carry out work(
Two original power values that rate value improves processing are respectively less than or equal to -10dBm.
3. power detecting method when being calibrated as claimed in claim 1 for terminal relative power, it is characterised in that carry out work(
Performance number increase rate in rate value raising processing is 10dB~40dB.
4. being used for power detecting method when terminal relative power is calibrated as described in any one of claims 1 to 3, it is special
Levy and be, carrying out same performance number raising to two original power values using same VGA is handled.
5. power detecting method when being calibrated as claimed in claim 4 for terminal relative power, it is characterised in that utilize one
Individual VGA carries out same performance number raising to two original power values and handled.
6. power detecting method when being calibrated as claimed in claim 1 for terminal relative power, it is characterised in that the inspection
Measurement equipment includes comprehensive test instrument or frequency spectrograph.
7. power detecting system during a kind of calibration for terminal relative power, it is characterised in that including：
First processing equipment, to be carried to needing two original power values for performing relative power calibration to carry out same performance number
High disposal；
Second processing equipment, to detect two performance numbers after improving using detection device, obtains two detected power
The difference of value.
8. power detecting system when being calibrated as claimed in claim 7 for terminal relative power, it is characterised in that carry out work(
Two original power values that rate value improves processing are respectively less than or equal to -10dBm.
9. power detecting system when being calibrated as claimed in claim 7 for terminal relative power, it is characterised in that carry out work(
Performance number increase rate in rate value raising processing is 10dB~40dB.
10. it is used for power detecting system when terminal relative power is calibrated as described in any one of claim 7 to 9, its
It is characterised by, carrying out same performance number raising to two original power values using same VGA is handled.
11. power detecting system when being calibrated as claimed in claim 10 for terminal relative power, it is characterised in that utilize
One VGA carries out same performance number raising to two original power values and handled.
12. power detecting system when being calibrated as claimed in claim 7 for terminal relative power, it is characterised in that described
Detection device includes comprehensive test instrument or frequency spectrograph.
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| CN201210109450.5A CN103379534B (en) | 2012-04-13 | 2012-04-13 | Power detecting method and system when being calibrated for terminal relative power |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210109450.5A CN103379534B (en) | 2012-04-13 | 2012-04-13 | Power detecting method and system when being calibrated for terminal relative power |
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| CN103379534A CN103379534A (en) | 2013-10-30 |
| CN103379534B true CN103379534B (en) | 2017-07-28 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1492609A (en) * | 1995-06-30 | 2004-04-28 | �����ּ�����˾ | Automatic power control system for CDMA communication system |
| CN1778038A (en) * | 2002-11-04 | 2006-05-24 | 捷讯研究有限公司 | Method and apparatus for regulating the transmitted power in multi-rate wireless communication systems |
| CN102300226A (en) * | 2011-09-06 | 2011-12-28 | 惠州Tcl移动通信有限公司 | Method for calibrating power of wideband code division multiple access (WCDMA) mobile terminal and calibration system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101098127A (en) * | 2006-06-19 | 2008-01-02 | 株式会社瑞萨科技 | RF power amplifier |
| CN102208953B (en) * | 2010-03-29 | 2014-03-12 | 比亚迪股份有限公司 | Calibration method of mobile phone transmission power |
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2012
- 2012-04-13 CN CN201210109450.5A patent/CN103379534B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1492609A (en) * | 1995-06-30 | 2004-04-28 | �����ּ�����˾ | Automatic power control system for CDMA communication system |
| CN1778038A (en) * | 2002-11-04 | 2006-05-24 | 捷讯研究有限公司 | Method and apparatus for regulating the transmitted power in multi-rate wireless communication systems |
| CN102300226A (en) * | 2011-09-06 | 2011-12-28 | 惠州Tcl移动通信有限公司 | Method for calibrating power of wideband code division multiple access (WCDMA) mobile terminal and calibration system |
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