CN104703268B - filter power compensation method, device and user terminal - Google Patents
filter power compensation method, device and user terminal Download PDFInfo
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- CN104703268B CN104703268B CN201310656517.1A CN201310656517A CN104703268B CN 104703268 B CN104703268 B CN 104703268B CN 201310656517 A CN201310656517 A CN 201310656517A CN 104703268 B CN104703268 B CN 104703268B
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- gain control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
Abstract
A kind of filter power compensation method, device and user terminal, the filter power compensation method include：Continuous wave corresponding to selecting default first calibration frequency, the automatic gain control calibration value of the continuous wave is obtained, and using the calibration value as the first calibration value；Centered on the described first calibration frequency, frequency is chosen with a length of interval of the first step in the described first calibration frequency both sides respectively, obtains the automatic gain control calibration value of continuous wave corresponding to the frequency of the selection；Computing is carried out in pre-set bandwidths to the automatic gain control calibration value of continuous wave corresponding to the frequency of the selection；The automatic gain control calibration value of obtained corresponding bandwidth and first calibration value are subjected to computing, obtain the revised automatic gain control calibration value of corresponding bandwidth, and the power compensating value using the revised automatic gain control calibration value as wave filter.Using the filter power compensation method and device, the precision that filter power compensates can be effectively improved.
Description
Technical field
The present invention relates to mobile communication technology field, more particularly to a kind of filter power compensation method, device and user
Terminal.
Background technology
Long-term technology evolution（Long Term Evolution, LTE）It is third generation partner program（3rd
Generation Partnership Project, 3GPP）The Long Term Evolution of leading UMTS technology, is mesh
The preceding wireless communication technology being widely recognized as.
LTE mobile terminal needs the waveform of the LTE signals using test to increase LTE mobile terminal automatically before dispatching from the factory
Benefit control（Automatic Gain Control, AGC）Calibration.The waveform of LTE signals is a kind of waveform with bandwidth, is used
LTE ripples or continuous wave（Continuous Wave, CW）AGC calibrations are carried out, when being calibrated using LTE ripples, because LTE ripples are
There is the waveform of bandwidth, therefore the LTE waveforms after calibration are not in error by LTE mobile terminal wave filter, but use LTE
It is higher that ripple carries out cost during AGC calibrations, AGC calibrations is typically carried out to LTE waveforms using CW ripples, but CW ripples are that a kind of do not have bandwidth
Waveform, decay occurs after LTE mobile terminal wave filter, causes CW ripple calibration results to be deposited the LTE waveforms after calibrating
Power back-off is carried out to the signal of device after filtering to LTE waveforms needs in certain error, therefore using CW ripples.
In prior art, for the wave filter of a certain model, the wave filter of multiple models is usually chosen, is calculated
Corresponding power compensating value is simultaneously averaged, the constant power offset as the model wave filter.By the filtering of the fixation
Device power compensating value is write in default memory, and the wave filter work(of the fixation is directly invoked in mobile terminal reception signal
Rate offset compensates to the power of reception signal.However, in actual applications, even the wave filter of same model, respectively
There is also difference between power compensating value and fixed filters power compensating value between wave filter, therefore use fixed power
Offset can cause filter power compensate and it is inaccurate.
The content of the invention
The embodiment of the present invention solves the problems, such as it is how to improve the precision of filter power compensation.
To solve the above problems, the embodiment of the present invention provides a kind of filter compensation method, including：Select default first
Continuous wave corresponding to calibrating frequency, obtains the automatic gain control calibration value of the continuous wave, and regard the calibration value as the
One calibration value；Centered on the described first calibration frequency, respectively in the described first calibration frequency both sides with a length of interval of the first step
Frequency is chosen, obtains the automatic gain control calibration value of continuous wave corresponding to the frequency of the selection；To the frequency of the selection
The automatic gain control calibration value of corresponding continuous wave carries out computing in pre-set bandwidths, obtains the correspondence pre-set bandwidths oneself
Dynamic gain control calibration value；The automatic gain control calibration value of the corresponding bandwidth is subjected to computing with first calibration value,
Obtain the corresponding revised automatic gain control calibration value of bandwidth, and using the revised automatic gain control calibration value as
The power compensating value of wave filter.
Optionally, the automatic gain control calibration value to continuous wave corresponding to the selection frequency is in pre-set bandwidths
Computing is carried out, including：The automatic gain control calibration value of continuous wave corresponding to the selection frequency is carried out in pre-set bandwidths
Discrete integration computing.
Optionally, the pre-set bandwidths include：5MHz, 10MHz, 15MHz and 20MHz.
Optionally, the automatic gain control calibration value by corresponding bandwidth carries out computing with first calibration value, obtains
To the revised automatic gain control calibration value of corresponding bandwidth, including：Respectively by 5MHz, 10MHz, 15MHz and 20MHz bandwidth pair
The automatic gain control calibration value answered is subtracted each other with first calibration value, obtain revised 5MHz, 10MHz, 15MHz and
20MHz bandwidth automatic gain control calibration values.
Optionally, the value of first step-length is 0.1MHz to 1MHz.
To solve the above problems, the embodiment of the present invention additionally provides a kind of filter power compensation device, including：First obtains
Unit is taken, for continuous wave corresponding to selecting default first calibration frequency, obtains the automatic growth control school of the continuous wave
Quasi- value, and using the calibration value as the first calibration value；Second acquisition unit, for by described first calibration frequency centered on,
Frequency is chosen with a length of interval of the first step in the described first calibration frequency both sides respectively, connected corresponding to the frequency for obtaining the selection
The automatic gain control calibration value of continuous ripple；First arithmetic element, for the automatic of continuous wave corresponding to the frequency to the selection
Gain control calibration value carries out computing in pre-set bandwidths, obtains the automatic gain control calibration value of the corresponding pre-set bandwidths；
Second arithmetic element, for the automatic gain control calibration value of the corresponding bandwidth to be carried out into computing with first calibration value,
Obtain the corresponding revised automatic gain control calibration value of bandwidth, and using the revised automatic gain control calibration value as
The power compensating value of wave filter.
Optionally, first arithmetic element is used for the automatic growth control school to continuous wave corresponding to the selection frequency
Quasi- value carries out discrete integration computing in pre-set bandwidths.
Optionally, the pre-set bandwidths include：5MHz, 10MHz, 15MHz and 20MHz.
Optionally, second arithmetic element is used to corresponding to 5MHz, 10MHz, 15MHz and 20MHz bandwidth automatically to increase
Benefit control calibration value subtracts each other with first calibration value, and it is automatic to obtain revised 5MHz, 10MHz, 15MHz and 20MHz bandwidth
Gain controls calibration value.
The embodiment of the present invention additionally provides a kind of user terminal, includes any one of the filter power compensation device.
Compared with prior art, the technical scheme of the embodiment of the present invention has advantages below：
Multiple frequencies are chosen by using default first step-length, multiple AGC are obtained using CW ripples corresponding to multiple frequencies
Calibration value, and computing is carried out in default bandwidth to multiple AGC calibration values of acquisition, obtain the AGC calibrations in pre-set bandwidths
Value, and computing is carried out with the first calibration value, using operation result as the revised automatic gain control calibration value of corresponding bandwidth, and
Power compensating value using the revised automatic gain control calibration value as wave filter.Due to being to be directed to different wave filters
Filter power offset corresponding to calculating carries out power back-off to wave filter, therefore can improve the essence of filter power compensation
Degree.
Brief description of the drawings
Fig. 1 is a kind of flow chart of filter power compensation method in the embodiment of the present invention；
Fig. 2 is the flow chart of another filter power compensation method in the embodiment of the present invention；
Fig. 3 is a kind of structural representation of filter power compensation device in the embodiment of the present invention.
Embodiment
In prior art, generally by the filter power offset that is fixed is measured in advance, to filtered
LTE signals after the calibration of ripple device carry out power back-off.However, in actual applications, even the wave filter of same model, respectively
There is also difference between power compensating value and fixed filters power compensating value between wave filter, therefore use fixed power
Offset can cause filter power compensate and it is inaccurate.
In the embodiment of the present invention, wave filter is carried out for filter power offset corresponding to different wave filter calculating
Power back-off, therefore the precision of filter power compensation can be improved.
It is understandable to enable the above objects, features and advantages of the present invention to become apparent, below in conjunction with the accompanying drawings to the present invention
Specific embodiment be described in detail.
The embodiments of the invention provide a kind of filter power compensation method, reference picture 1, is carried out below by way of specific steps
Describe in detail.
Step S101, selects continuous wave corresponding to default first calibration frequency, and the AGC for obtaining the continuous wave is calibrated
Value, and using the calibration value as the first calibration value.
In specific implementation, the described first calibration frequency pair can be utilized according to the calibration frequency of selection first is actually needed
The continuous wave answered carries out AGC calibrations to LTE signal waveforms, obtains the first AGC calibration values.
Step S102, centered on the described first calibration frequency, respectively in the described first calibration frequency both sides with the first step
Frequency is chosen at a length of interval, obtains the AGC calibration values of continuous wave corresponding to the frequency of the selection.
In specific implementation, frequency, and profit can be selected successively with the first step-length in the first calibration frequency both sides of selection
Continuous wave carries out AGC calibrations to LTE signal waveforms corresponding to the frequency of selection, AGC calibration values corresponding to acquisition.In the present invention
In one embodiment, the value of the first step-length can be 0.1MHz~1MHz, and concrete numerical value can be selected as needed.
Step S103, computing is carried out in pre-set bandwidths to the AGC calibration values of continuous wave corresponding to the frequency of the selection,
Obtain the AGC calibration values of the corresponding pre-set bandwidths.
In specific implementation, the default bandwidth can be the transmission bandwidth of LTE base station.In existing LTE protocol,
The transmission bandwidth of base station can be 5MHz, 10MHz, 15MHz and 20MHz.The frequency chosen in pre-set bandwidths to step S102
The AGC calibration values of corresponding continuous wave carry out discrete integration computing, obtain the AGC of 5MHz, 10MHz, 15MHz and 20MHz bandwidth
Calibration value, AGC_5M, AGC_10M, AGC_15M and AGC_20M can be expressed as.
Step S104, the AGC calibration values of the corresponding bandwidth are subjected to computing with first calibration value, obtain corresponding band
Wide revised AGC calibration values, and the power compensating value using the revised AGC calibration values as wave filter.
In specific implementation, AGC_5M, AGC_10M, AGC_15M and AGC_20M that step S103 is obtained can be distinguished
The first AGC calibration values obtained with step S101 subtract each other, and obtain the corresponding revised AGC calibration values of bandwidth, and by the amendment
Power compensating value of the AGC calibration values as wave filter afterwards.
It is understood that in step S104, can also by the first AGC value and AGC_5M, AGC_10M, AGC_15M and
AGC_20M subtracts each other, and obtained difference, which is taken absolute value, can also obtain the revised AGC calibration values of corresponding bandwidth, and by described in
Power compensating value of the revised AGC calibration values as wave filter.
It can be seen that choosing multiple frequencies by using default first step-length, obtained using CW ripples corresponding to multiple frequencies more
Individual AGC calibration values, and the AGC calibration values in pre-set bandwidths are obtained using discrete integration, subtract each other with the first calibration value as corresponding
The revised automatic gain control calibration value of bandwidth.Due to being for filter power compensation corresponding to different wave filter calculating
Value carries out power back-off to wave filter, therefore can improve the precision of filter power compensation.
In specific implementation, such scheme can also be further expanded, be carried out below by way of specific embodiment detailed
Explanation.
The embodiment of the present invention additionally provides a kind of filter power compensation method, reference picture 2, enters below by way of specific steps
Row describes in detail.
Step S201, select CW ripples corresponding to default first calibration frequency.
In embodiments of the present invention, default first calibration frequency can be 1800MHz, can also select it as needed
The frequency of his frequency is as the first calibration frequency.
Step S202, obtain the AGC calibration values of the CW ripples.
In embodiments of the present invention, AGC schools can be carried out to LTE signal waveforms using CW ripples corresponding to 1800MHz frequencies
Standard, the first AGC calibration values are obtained, AGC_CW can be expressed as.In actual applications, the LTE signal waveforms can be used for
The LTE signal waveforms of test, the LTE signal waveforms after being calibrated using CW ripples are passed through into mobile terminal wave filter, obtain LTE
The performance number of the decay of signal waveform, you can the AGC calibration values as CW ripples.
Step S203, centered on the first calibration frequency, respectively in the first calibration frequency both sides with a length of interval of the first step
Choose frequency.
For example, the point centered on 1800MHz, chooses successively in the 10MHz of 1800MHz both sides using 1MHz as the first step-length
Frequency, then 20 frequencies can be now chosen, be followed successively by 1790MHz, 1791MHz, 1792MHz ... 1809MHz, 1810MHz,
AGC calibrations are carried out to LTE signal waveforms using CW ripples corresponding to 20 frequencies of selection, obtain corresponding 20 AGC calibration values.
0.5MHz can also be chosen and choose frequency successively as the first step-length, can now choose 40 frequencies, and utilize the frequency chosen
CW ripples obtain AGC calibration values corresponding to point.Likewise, can also choose other step-lengths chooses frequency successively as the first step-length.
Step S204, obtain the AGC calibration values of CW ripples corresponding to the frequency of the selection.
Step S205, discrete integration is carried out to the AGC calibration values of CW ripples corresponding to the frequency of selection in default bandwidth.
In embodiments of the present invention, can respectively in 5MHz, 10MHz, 15MHz and 20MHz bandwidth to the frequency of selection
The AGC calibration values of corresponding CW ripples carry out discrete integration, can obtain the AGC schools of 5MHz, 10MHz, 15MHz and 20MHz bandwidth
Quasi- value, is expressed as AGC_5M, AGC_10M, AGC_15M and AGC_20M.
Step S206, AGC calibration values corresponding to default bandwidth are subtracted each other with AGC_CW, it is revised to obtain corresponding bandwidth
AGC calibration values, and the power compensating value using the revised AGC calibration values as wave filter.
In embodiments of the present invention, Delta_5MHz can be expressed as 5MHz bandwidth, revised AGC calibration values,
Delta_5MHz=AGC_5M-AGC_CW, similarly, for the revised AGC calibration values of 10MHz, 15MHz and 20MHz bandwidth,
Identical calculating can be carried out with Delta_5MHz computational methods, do not repeated herein.
It is understood that when the value of the first step-length of selection is smaller, the number of the frequency of selection can be more, obtain
AGC calibration value is more, i.e., the AGC calibration values in 5MHz, 10MHz, 15MHz and 20MHz bandwidth are just more.Therefore work as
When carrying out discrete integration to AGC calibration values in 5MHz, 10MHz, 15MHz and 20MHz bandwidth, obtained AGC_5M, AGC_10M,
AGC_15M and AGC_20M value will be more accurate.
When the step-length for choosing frequency is smaller, the frequency points of selection are more, and AGC calibration value is more smart in corresponding bandwidth
Really, the precision of filter power compensation therefore is further improved.
The embodiment of the present invention additionally provides a kind of filter power compensation device 30, including：First acquisition unit 301,
Two acquiring units 302, the first arithmetic element 303 and the second arithmetic element 304, wherein：
First acquisition unit 301, for select it is default first calibration frequency corresponding to continuous wave, obtain the continuous wave
Automatic gain control calibration value, and using the calibration value as the first calibration value；
Second acquisition unit 302, for centered on the described first calibration frequency, calibrating frequency two described first respectively
Frequency is chosen in side with a length of interval of the first step, obtains the automatic gain control calibration of continuous wave corresponding to the frequency of the selection
Value；
First arithmetic element 303, the automatic gain control calibration value for continuous wave corresponding to the frequency to the selection
Computing is carried out in pre-set bandwidths, obtains the automatic gain control calibration value of the corresponding pre-set bandwidths；
Second arithmetic element 304, for the automatic gain control calibration value of the corresponding bandwidth to be calibrated with described first
Value carries out computing, obtains the corresponding revised automatic gain control calibration value of bandwidth, and by the revised automatic gain control
Power compensating value of the calibration value processed as wave filter.
In specific implementation, first arithmetic element 303 is used for the automatic of continuous wave corresponding to the selection frequency
Gain control calibration value carries out discrete integration computing in pre-set bandwidths.
In specific implementation, the pre-set bandwidths include：5MHz, 10MHz, 15MHz and 20MHz.
In specific implementation, second arithmetic element 304 is used for 5MHz, 10MHz, 15MHz and 20MHz bandwidth is corresponding
Automatic gain control calibration value subtract each other with first calibration value, obtain revised 5MHz, 10MHz, 15MHz and 20MHz
Bandwidth automatic gain control calibration value.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can
To instruct the hardware of correlation to complete by program, the program can be stored in a computer-readable recording medium, storage
Medium can include：ROM, RAM, disk or CD etc..
Although present disclosure is as above, the present invention is not limited to this.Any those skilled in the art, this is not being departed from
In the spirit and scope of invention, it can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
The scope of restriction is defined.
Claims (8)
- A kind of 1. filter power compensation method, it is characterised in that including：Continuous wave corresponding to selecting default first calibration frequency, the automatic gain control calibration value of the continuous wave is obtained, and Using the calibration value as the first calibration value；Centered on the described first calibration frequency, frequency is chosen with a length of interval of the first step in the described first calibration frequency both sides respectively Point, obtain the automatic gain control calibration value of continuous wave corresponding to the frequency of the selection；Discrete integration is carried out in pre-set bandwidths to the automatic gain control calibration value of continuous wave corresponding to the frequency of the selection Computing, obtain the automatic gain control calibration value of the corresponding pre-set bandwidths；The automatic gain control calibration value of the corresponding pre-set bandwidths is subjected to computing with first calibration value, obtains corresponding band Wide revised automatic gain control calibration value, and the work(using the revised automatic gain control calibration value as wave filter Rate offset.
- 2. filter power compensation method as claimed in claim 1, it is characterised in that the pre-set bandwidths include：5MHz、 10MHz, 15MHz and 20MHz.
- 3. filter power compensation method as claimed in claim 2, it is characterised in that described to correspond to the pre-set bandwidths Automatic gain control calibration value carries out computing with first calibration value, obtains the corresponding revised automatic growth control school of bandwidth Quasi- value, including：Respectively by automatic gain control calibration value corresponding to 5MHz, 10MHz, 15MHz and 20MHz bandwidth and described first Calibration value subtracts each other, and obtains revised 5MHz, 10MHz, 15MHz and 20MHz bandwidth automatic gain control calibration value.
- 4. filter power compensation method as claimed in claim 1, it is characterised in that the value of first step-length is 0.1MHz To 1MHz.
- A kind of 5. filter power compensation device, it is characterised in that including：First acquisition unit, for select it is default first calibration frequency corresponding to continuous wave, obtain the automatic of the continuous wave Gain controls calibration value, and using the calibration value as the first calibration value；Second acquisition unit, for centered on the described first calibration frequency, respectively in the described first calibration frequency both sides with the One step-length chooses frequency for interval, obtains the automatic gain control calibration value of continuous wave corresponding to the frequency of the selection；First arithmetic element, the automatic gain control calibration value for continuous wave corresponding to the frequency to the selection is in default band Discrete integration computing is carried out in wide, obtains the automatic gain control calibration value of the corresponding pre-set bandwidths；Second arithmetic element, for the automatic gain control calibration value of the corresponding pre-set bandwidths to be entered with first calibration value Row computing, obtains the corresponding revised automatic gain control calibration value of bandwidth, and by the revised automatic growth control school Power compensating value of the quasi- value as wave filter.
- 6. filter power compensation device as claimed in claim 5, it is characterised in that the pre-set bandwidths include：5MHz、 10MHz, 15MHz and 20MHz.
- 7. filter power compensation device as claimed in claim 6, it is characterised in that second arithmetic element is used for will Automatic gain control calibration value corresponding to 5MHz, 10MHz, 15MHz and 20MHz bandwidth is subtracted each other with first calibration value, is obtained Revised 5MHz, 10MHz, 15MHz and 20MHz bandwidth automatic gain control calibration value.
- 8. a kind of user terminal, it is characterised in that including the filter power compensation device described in any one of claim 5 to 7.
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| CN106332228A (en) * | 2015-06-16 | 2017-01-11 | 联芯科技有限公司 | Frequency sweeping method and device according to frequency band |
| CN109981187B (en) * | 2017-12-28 | 2022-02-15 | 北京小米松果电子有限公司 | Image transmission calibration method and device, storage medium and electronic equipment |
| CN108650034B (en) * | 2018-05-15 | 2021-06-22 | 京信通信系统（中国）有限公司 | Gain calibration method and device for radio frequency equipment |
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| US6687489B1 (en) * | 1999-11-15 | 2004-02-03 | Texas Instruments Incorporated | Implementing RF power measurements in a broadband communications device |
| WO2012055185A1 (en) * | 2010-10-27 | 2012-05-03 | 中兴通讯股份有限公司 | Radio frequency calibration method and device for mobile terminal |
| CN103236997A (en) * | 2013-05-03 | 2013-08-07 | 福建京奥通信技术有限公司 | Long term evolution-interference cancellation system (LTE-ICS) and method |
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2013
- 2013-12-06 CN CN201310656517.1A patent/CN104703268B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6687489B1 (en) * | 1999-11-15 | 2004-02-03 | Texas Instruments Incorporated | Implementing RF power measurements in a broadband communications device |
| WO2012055185A1 (en) * | 2010-10-27 | 2012-05-03 | 中兴通讯股份有限公司 | Radio frequency calibration method and device for mobile terminal |
| CN103236997A (en) * | 2013-05-03 | 2013-08-07 | 福建京奥通信技术有限公司 | Long term evolution-interference cancellation system (LTE-ICS) and method |
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