CN115372801B - Calibration method and system for base station radio frequency unit power amplifier - Google Patents

Calibration method and system for base station radio frequency unit power amplifier Download PDF

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Publication number
CN115372801B
CN115372801B CN202211298962.0A CN202211298962A CN115372801B CN 115372801 B CN115372801 B CN 115372801B CN 202211298962 A CN202211298962 A CN 202211298962A CN 115372801 B CN115372801 B CN 115372801B
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calibration
power amplifier
power
value
aclr
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CN115372801A (en
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陈茄
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Sichuan Hengwan Technology Co Ltd
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Sichuan Hengwan Technology Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28—Testing of electronic circuits, e.g. by signal tracer
    • G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
    • G01R31/2822—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere of microwave or radiofrequency circuits
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/30—Circuit design
    • G06F30/36—Circuit design at the analogue level
    • G06F30/367—Design verification, e.g. using simulation, simulation program with integrated circuit emphasis [SPICE], direct methods or relaxation methods
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/30—Circuit design
    • G06F30/36—Circuit design at the analogue level
    • G06F30/373—Design optimisation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The invention provides a calibration method and a calibration system for a base station radio frequency unit power amplifier, and relates to the technical field of radio frequency units. The method comprises the following steps: selecting output power
Figure 434377DEST_PATH_IMAGE001
Power amplifier
Figure 341153DEST_PATH_IMAGE002
Power amplifier
Figure 745458DEST_PATH_IMAGE003
. Configuration of
Figure 155711DEST_PATH_IMAGE004
Parameters, carrier wave is established according to maximum bandwidth, and transmitting link gain is adjusted to reach
Figure 738002DEST_PATH_IMAGE001
After that, ACLR performance was measured. If the ACLR performance reaches the standard, the calibration is finished, and the current state is recorded
Figure 882807DEST_PATH_IMAGE004
And (4) selecting proper stepping combination test to finish calibration if the ACLR performance does not reach the standard. According to the method, on the premise of meeting the accuracy of output power, the ACLR and the power consumption are used as calibration targets, and meanwhile, the time cost of actual production calibration and the measurement error are considered, and a proper stepping combination test is selected to finish calibration. Realizes the whole machine requirement based on the radio frequency unit and aims at improving the yield, reducing the cost and reducing the power consumptionThe goal of forming a globally optimized calibration scheme is.

Description

Calibration method and system for base station radio frequency unit power amplifier
Technical Field
The invention relates to the technical field of radio frequency units, in particular to a method and a system for calibrating a power amplifier of a radio frequency unit of a base station.
Background
Along with green energy conservation is more and more emphasized, in the field of wireless communication base stations, along with the orderly development of 5G, the problem of power consumption of the base stations is more and more concerned, and the trend of the green base stations is more and more obvious. For the equipment manufacturers, the source of the largest power consumption in the base station is the radio unit. How to effectively reduce the power consumption of the base station radio frequency unit becomes one of the core concerns of operators.
The macro base station is a mainstream device for outdoor coverage of the current radio frequency unit, and the total output power of each single-frequency-band radio frequency unit is different from 20W to 320W. Most of the power consumption of the radio frequency unit of the macro base station comes from the power amplifier, and taking a typical 5G base station as an example, the power consumption of the power amplifier accounts for about 70-90% of the overall power consumption of the radio frequency unit, so how to effectively reduce the power consumption of the power amplifier is one of the core competitiveness of equipment manufacturers.
The power amplifier of the macro base station radio frequency unit is a core module of the radio frequency unit, and has the function of amplifying power required by a corresponding radio frequency signal to a system and transmitting the power through an antenna. From the system requirements of the rf unit, the power amplifier must reach a peak power to ensure that the signal can be transmitted with a desired quality. Therefore, in designing a power amplifier, peak power is one of the criteria that must be achieved in terms of design. The peak power is related to the peak demand of the signal, and we use the peak-to-average ratio to represent the peak magnitude of the signal, i.e. the ratio of the peak power to the average power, in dB, typically 7.5dB.
The peak power and the power consumption of the power amplifier are inherently contradictory. The power amplifier is essentially a high-power triode, and the configuration parameter related to the triode is mainly the voltage of a base electrode: (
Figure 237974DEST_PATH_IMAGE001
) And voltage of drain electrode: (
Figure 33892DEST_PATH_IMAGE002
). The higher the allowable range of the device
Figure 255926DEST_PATH_IMAGE003
Which usually means a higher peak power,but power consumption of the power amplifier
Figure 137294DEST_PATH_IMAGE004
In which
Figure 883402DEST_PATH_IMAGE005
Is the current at the drain. Lifting of
Figure 533826DEST_PATH_IMAGE006
Will bring higher power consumption: (
Figure 457920DEST_PATH_IMAGE007
Followed by
Figure 561005DEST_PATH_IMAGE008
Usually with little variation).
In the current power amplifier calibration, there are the following ways:
first basic calibration mode, determined by the designer
Figure 343760DEST_PATH_IMAGE002
And a preset static state
Figure 114270DEST_PATH_IMAGE009
Then at the time of production set
Figure 209265DEST_PATH_IMAGE002
Then, adjust by adjusting DAC (Digital to Analog)
Figure 799646DEST_PATH_IMAGE001
To reach the target value of the drain voltage
Figure 887557DEST_PATH_IMAGE010
. And finally, recording the corresponding DAC value as the calibration value of the power amplifier, and storing the calibration value in a product database.
A second, further calibration, is performed by the designer to give the desired peak power
Figure 246994DEST_PATH_IMAGE011
Adjusting for power amplifiers that do not meet peak power requirements by measuring peak power of the power amplifier after the basic calibration is completed
Figure 512890DEST_PATH_IMAGE001
And
Figure 341300DEST_PATH_IMAGE002
to ensure that the peak power requirement is eventually met, the final parameters are determined.
These calibration methods mainly perform related optimization from the perspective of the power amplifier itself, and perform local optimization, but are not system optimization of the whole radio frequency unit.
Meanwhile, for the power amplifier, the device characteristics determine that the peak power of the power amplifier fluctuates greatly. Referring to fig. 1, a typical saturation power distribution diagram of an rf power amplifier is shown in fig. 1, which has a fluctuation range of about 1 dB. If the calibration is done from a power amplifier perspective only, there must be either larger devices used or a large yield loss must be tolerated.
Disclosure of Invention
The invention aims to provide a calibration method and a calibration system for a base station radio frequency unit power amplifier, which can form a global optimization calibration scheme and improve the competitiveness of products based on the overall requirement of a radio frequency unit and aiming at improving the yield, reducing the cost and reducing the power consumption.
The embodiment of the invention is realized by the following steps:
in a first aspect, an embodiment of the present application provides a calibration method for a base station radio frequency unit power amplifier, which includes the following steps:
s110: responding to power-on initialization operation to finish initial power amplifier grid voltage calibration;
s120: selecting output power
Figure 718055DEST_PATH_IMAGE012
Wherein, in the process,
Figure 197578DEST_PATH_IMAGE013
，
Figure 634375DEST_PATH_IMAGE014
a rated power value for normal output;
s130: selection power amplifier
Figure 448616DEST_PATH_IMAGE015
Wherein, in the step (A),
Figure 629062DEST_PATH_IMAGE016
，
Figure 963091DEST_PATH_IMAGE017
is the minimum drain voltage;
s140: selection power amplifier
Figure 570790DEST_PATH_IMAGE001
Wherein, in the step (A),
Figure 370863DEST_PATH_IMAGE018
，
Figure 89420DEST_PATH_IMAGE019
is the minimum base voltage;
s150: configuration of
Figure 543535DEST_PATH_IMAGE020
Parameters, and simultaneously, carrier waves are established according to the maximum bandwidth, and the gain of a transmitting link is adjusted to reach
Figure 322135DEST_PATH_IMAGE012
；
S160: measuring ACLR performance, judging whether the ACLR performance reaches the standard, if the ACLR performance reaches the standard, indicating that the calibration is finished, and simultaneously recording the current performance
Figure 110968DEST_PATH_IMAGE020
A parameter;
s170: if the ACLR performance does not reach the standard, the public standard is utilizedFormula (II)
Figure 633217DEST_PATH_IMAGE021
Adjustment of
Figure 676259DEST_PATH_IMAGE022
Value, if adjusted
Figure 625760DEST_PATH_IMAGE022
Value satisfies
Figure 403355DEST_PATH_IMAGE023
Then the process returns to S140, if not
Figure 463715DEST_PATH_IMAGE023
Then use the formula
Figure 626843DEST_PATH_IMAGE024
Adjustment of
Figure 996513DEST_PATH_IMAGE025
Value, and at this time
Figure 245092DEST_PATH_IMAGE022
The value is still the initial value 0;
s180: if adjusted
Figure 109143DEST_PATH_IMAGE025
Value satisfies
Figure 392356DEST_PATH_IMAGE026
Then, the process returns to S130, if not
Figure 165884DEST_PATH_IMAGE026
Then use the formula
Figure 901759DEST_PATH_IMAGE027
Adjustment of
Figure 303921DEST_PATH_IMAGE028
Values, and when G = D =0;
S190: if adjusted
Figure 690909DEST_PATH_IMAGE028
Value satisfies
Figure 153114DEST_PATH_IMAGE029
Then the process returns to S120, if not satisfied
Figure 110706DEST_PATH_IMAGE029
If so, the calibration fails.
In some embodiments of the present invention, the step of S110 includes:
obtained and preset according to a database
Figure 316560DEST_PATH_IMAGE017
Setting the leakage voltage of the power amplifier, and simultaneously reading the preset static working current of the power amplifier in the database
Figure 59519DEST_PATH_IMAGE030
；
Scanning a preset grid voltage range until a corresponding leakage current is obtained
Figure 692625DEST_PATH_IMAGE031
；
Based on the leakage current, obtaining
Figure 403092DEST_PATH_IMAGE019
，
Figure 396325DEST_PATH_IMAGE019
Is the initial calibration result.
In some embodiments of the present invention, the step S150 includes:
configuration of
Figure 508638DEST_PATH_IMAGE020
Parameters, carrier waves are established according to the maximum bandwidth, and numerical control attenuation values are set to preset values;
the numerical control attenuation is gradually adjusted by taking 1dB as step according to the power read by the instrumentValue to power
Figure 312646DEST_PATH_IMAGE032
Then, the numerical control attenuation value is gradually adjusted to reach the power by taking 0.1dB as step according to the power read by the instrument
Figure 510409DEST_PATH_IMAGE033
；
When the power reaches
Figure 805867DEST_PATH_IMAGE033
And stopping adjusting the numerical control attenuation value and waiting for preset time to ensure stable performance.
In some embodiments of the present invention, the predetermined time is 20 seconds.
In some embodiments of the present invention, the step of measuring ACLR performance includes:
ACLR performance was measured using a standard template of the spectrometer.
In some embodiments of the present invention, the step of determining whether the ACLR performance meets the standard includes:
acquiring a calibration reference value;
and judging whether the ACLR performance reaches the standard or not according to the calibration reference value.
In some embodiments of the invention, the calibration reference value comprises
Figure 507107DEST_PATH_IMAGE019
is-4.5V,
Figure 747596DEST_PATH_IMAGE017
Is 44V.
In a second aspect, an embodiment of the present application provides a calibration system for a power amplifier of a radio frequency unit of a base station, which includes:
the power amplifier grid voltage calibration module is used for responding to power-on initialization operation and completing initial power amplifier grid voltage calibration;
an output power selection module for selecting output power
Figure 150764DEST_PATH_IMAGE012
Wherein, in the step (A),
Figure 502111DEST_PATH_IMAGE013
，
Figure 323436DEST_PATH_IMAGE014
a rated power value for normal output;
a power amplifier Vd selection module for selecting power amplifier
Figure 405DEST_PATH_IMAGE015
Wherein, in the process,
Figure 907182DEST_PATH_IMAGE016
，
Figure 281793DEST_PATH_IMAGE017
is the minimum drain voltage;
power amplifier Vg selecting module for selecting power amplifier
Figure 223205DEST_PATH_IMAGE001
Wherein, in the process,
Figure 539916DEST_PATH_IMAGE018
，
Figure 183256DEST_PATH_IMAGE019
is the minimum base voltage;
a link gain adjustment module to configure
Figure 876406DEST_PATH_IMAGE020
Parameters, simultaneously establishing carrier waves according to the maximum bandwidth, and adjusting the gain of a transmitting link to reach
Figure 141165DEST_PATH_IMAGE012
；
A performance measurement module for measuring ACLR performance, judging whether the ACLR performance reaches the standard, if the ACLR performance reaches the standard, indicating that the calibration is completed, and recording the current performance
Figure 642160DEST_PATH_IMAGE020
A parameter;
a performance judgment module for utilizing the formula if the ACLR performance does not reach the standard
Figure 523528DEST_PATH_IMAGE021
Adjustment of
Figure 754790DEST_PATH_IMAGE022
Value, if adjusted
Figure 405214DEST_PATH_IMAGE022
Value satisfies
Figure 312996DEST_PATH_IMAGE023
Then returning to the power amplifier Vg selection module, if not, then returning to the power amplifier Vg selection module
Figure 416081DEST_PATH_IMAGE023
Then use the formula
Figure 716612DEST_PATH_IMAGE024
Adjustment of
Figure 487122DEST_PATH_IMAGE025
Value, and at this time
Figure 801691DEST_PATH_IMAGE022
The value is still the initial value 0;
an adjusting module for adjusting
Figure 392072DEST_PATH_IMAGE025
Value satisfies
Figure 230716DEST_PATH_IMAGE026
Returning to the power amplifier Vd selection module if the Vd is not satisfied
Figure 573841DEST_PATH_IMAGE026
Then use the formula
Figure 839737DEST_PATH_IMAGE027
Adjustment of
Figure 917415DEST_PATH_IMAGE028
A value, and when G = D =0;
a calibration failure indication module for indicating if the calibration is adjusted
Figure 41972DEST_PATH_IMAGE028
Value satisfies
Figure 787074DEST_PATH_IMAGE029
Then returning to the output power selection module, if not, returning to the output power selection module
Figure 223872DEST_PATH_IMAGE029
It indicates that the calibration fails this time.
In a third aspect, an embodiment of the present application provides an electronic device, which includes a memory for storing one or more programs; a processor. The program or programs, when executed by a processor, implement the method of any of the first aspects as described above.
In a fourth aspect, embodiments of the present application provide a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the method according to any one of the first aspect described above.
Compared with the prior art, the embodiment of the invention has at least the following advantages or beneficial effects:
the invention provides a calibration method and a system for a base station radio frequency unit power amplifier, which comprises the following steps: s110: and responding to the power-on initialization operation to finish the initial power amplifier grid voltage calibration. S120: selecting output power
Figure 788845DEST_PATH_IMAGE012
Wherein, in the step (A),
Figure 218559DEST_PATH_IMAGE013
，
Figure 818167DEST_PATH_IMAGE014
the rated power value is normally output. S130: selection power amplifier
Figure 160287DEST_PATH_IMAGE015
Wherein, in the step (A),
Figure 478136DEST_PATH_IMAGE016
，
Figure 196693DEST_PATH_IMAGE017
is the minimum drain voltage. S140: selecting power amplifier
Figure 401540DEST_PATH_IMAGE001
Wherein, in the step (A),
Figure 180141DEST_PATH_IMAGE018
，
Figure 719706DEST_PATH_IMAGE019
is the minimum base voltage. S150: configuration of
Figure 241955DEST_PATH_IMAGE020
Parameters, simultaneously establishing carrier waves according to the maximum bandwidth, and adjusting the gain of a transmitting link to reach
Figure 65423DEST_PATH_IMAGE012
. S160: measuring ACLR performance, judging whether the ACLR performance reaches the standard, if the ACLR performance reaches the standard, indicating that the calibration is finished, and simultaneously recording the current performance
Figure 14924DEST_PATH_IMAGE020
And (4) parameters. Compared with the traditional calibration method adopting peak power as the measurement standard, the method directly adopts the final linearization performance index ACLR as the final measurement standard, and avoids performance excess and overlarge power consumption caused by the redundancy of the peak power. S170: if the ACLR performance does not reach the standard, the formula is utilized
Figure 776207DEST_PATH_IMAGE021
Adjustment of
Figure 102146DEST_PATH_IMAGE022
Value, if adjusted
Figure 530853DEST_PATH_IMAGE022
Value satisfies
Figure 422496DEST_PATH_IMAGE023
Then, the process returns to S140, if not
Figure 936654DEST_PATH_IMAGE023
Then use the formula
Figure 800705DEST_PATH_IMAGE024
Adjustment of
Figure 83919DEST_PATH_IMAGE025
Value, and at this time
Figure 890070DEST_PATH_IMAGE022
The value is still the initial value 0. S180: if adjusted
Figure 625945DEST_PATH_IMAGE025
Value satisfies
Figure 293686DEST_PATH_IMAGE026
Then the process returns to S130, if not satisfied
Figure 165827DEST_PATH_IMAGE026
Then use the formula
Figure 644344DEST_PATH_IMAGE027
Adjustment of
Figure 133095DEST_PATH_IMAGE028
Value, and when G = D = 0. S190: if adjusted
Figure 338948DEST_PATH_IMAGE028
Value satisfies
Figure 331175DEST_PATH_IMAGE029
Then, the process returns to S120, if not
Figure 495440DEST_PATH_IMAGE029
If so, the calibration fails. Therefore, when the ACLR performance is not up to standard, proper steps are selected for combined test to finish calibration, and the calibration method and the calibration system absorb the device uncertainty of the power amplifier, thereby indirectly ensuring that a device with lower power can be selected when the power amplifier is selected, and reducing the cost. According to the method and the system, on the premise of meeting the accuracy of output power, the ACLR and the power consumption are used as calibration targets, the time cost of actual production calibration and the measurement error are considered, appropriate steps are selected for combined test, then judgment is made according to the combined test result, and the calibration is completed. The aim of forming a global optimization calibration scheme by aiming at improving the yield, reducing the cost and reducing the power consumption based on the overall requirement of the radio frequency unit is fulfilled, and therefore the competitiveness of the product is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
FIG. 1 is a typical RF power amplifier saturation power distribution plot;
fig. 2 is a flowchart of a calibration method for a base station radio frequency unit power amplifier according to an embodiment of the present invention;
fig. 3 is a flowchart of another calibration method for a power amplifier of a base station radio unit according to an embodiment of the present invention;
fig. 4 is a diagram illustrating a relationship between a typical power amplifier Vd and power consumption at the same output power according to an embodiment of the present invention;
fig. 5 is a schematic structural block diagram of an electronic device according to an embodiment of the present invention;
fig. 6 is a diagram illustrating a test result of an exemplary ACLR index according to an embodiment of the present invention;
fig. 7 is a block diagram of a calibration system for a power amplifier of a base station rf unit according to an embodiment of the present invention.
Icon: 110-a power amplifier grid voltage calibration module; 120-output power selection module; 130-a power amplifier Vd selection module; 140-a power amplifier Vg selecting module; 150-link gain adjustment module; 160-a performance measurement module; 170-performance judging module; 180-an adjustment module; 190-calibration failure indication module; 101-a memory; 102-a processor; 103-a communication interface.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not construed as indicating or implying relative importance.
It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the presence of an element identified by the phrases "comprising a component of' 8230; \8230;" does not exclude the presence of additional like elements in any process, method, article, or apparatus that comprises the element.
In the description of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer", etc. are used to indicate an orientation or positional relationship based on that shown in the drawings or that the application product is usually placed in use, the description is merely for convenience and simplicity, and it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore should not be construed as limiting the present application.
In the description of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the individual features of the embodiments can be combined with one another without conflict.
Examples
Referring to fig. 2, fig. 2 is a flowchart illustrating a calibration method for a power amplifier of a base station radio unit according to an embodiment of the present invention. The embodiment of the application provides a calibration method of a base station radio frequency unit power amplifier, which comprises the following steps:
s110: responding to power-on initialization operation to finish initial power amplifier grid voltage calibration;
s120: selecting output power
Figure 189595DEST_PATH_IMAGE012
Wherein, in the step (A),
Figure 933560DEST_PATH_IMAGE013
，
Figure 45873DEST_PATH_IMAGE014
a rated power value for normal output;
s130: selection power amplifier
Figure 849881DEST_PATH_IMAGE015
Wherein, in the step (A),
Figure 795447DEST_PATH_IMAGE016
，
Figure 343103DEST_PATH_IMAGE017
is the minimum drain voltage;
s140: selecting power amplifier
Figure 575501DEST_PATH_IMAGE001
Wherein, in the step (A),
Figure 550410DEST_PATH_IMAGE018
，
Figure 484737DEST_PATH_IMAGE019
is the minimum base voltage;
s150: configuration of
Figure 836084DEST_PATH_IMAGE020
Parameters, simultaneously establishing carrier waves according to the maximum bandwidth, and adjusting the gain of a transmitting link to reach
Figure 657409DEST_PATH_IMAGE012
；
S160: measuring ACLR performance, judging whether the ACLR performance reaches the standard, if the ACLR performance reaches the standard, indicating that the calibration is finished, and simultaneously recording the current performance
Figure 334378DEST_PATH_IMAGE020
A parameter;
for example, to determine whether ACLR performance is satisfactory may be determined by combining the actual power amplifier design and the fluctuation range of the factory device, a typical set of calibration references is shown in table 1 below:
table 1: typical calibration reference values
Parameter(s) Typical value Remarks to note
Vgmin -4.5V Gate voltage of peak power amplifier
Vdmin 44V Typical high voltage power amplifier
Cmax 0.4 Acceptable error range of output power
Dmax 8 The high-voltage power amplifier does not exceed 52V
Gmax 0.5 The scanning range does not exceed 0.5V
ACLR performance standard-reaching requirement -48dBc The protocol requires 45dBc, and 3dB is reserved for aging of devices and the like; taking the left and right ACLR poor values as criteria
S170: if the ACLR performance does not reach the standard, the formula is utilized
Figure 241154DEST_PATH_IMAGE021
Adjustment of
Figure 881346DEST_PATH_IMAGE022
Value, if adjusted
Figure 822757DEST_PATH_IMAGE022
Value satisfies
Figure 139469DEST_PATH_IMAGE023
Then, the process returns to S140, if not
Figure 799120DEST_PATH_IMAGE023
Then use the formula
Figure 741537DEST_PATH_IMAGE024
Adjustment of
Figure 537455DEST_PATH_IMAGE025
Value, and at this time
Figure 290647DEST_PATH_IMAGE022
Value is stillIs an initial value of 0;
s180: if adjusted
Figure 437595DEST_PATH_IMAGE025
Value satisfies
Figure 668856DEST_PATH_IMAGE026
Then the process returns to S130, if not satisfied
Figure 67083DEST_PATH_IMAGE026
Then use the formula
Figure 991176DEST_PATH_IMAGE027
Adjustment of
Figure 359841DEST_PATH_IMAGE028
Values, and when G = D =0;
s190: if adjusted
Figure 394793DEST_PATH_IMAGE028
Value satisfies
Figure 148991DEST_PATH_IMAGE029
Then, the process returns to S120, if not
Figure 243986DEST_PATH_IMAGE029
If so, the calibration fails.
It should be noted that, in the transmission link of the radio frequency unit, a power amplifier linearization technique, such as a DPD (digital predistortion) technique, is widely adopted to ensure an ACLR (adjacent channel leakage ratio) index of the transmission link; the parameters such as peak power of the power amplifier are not equivalent to the final ACLR index. Therefore, as for the overall performance of the rf unit, the performance related to the calibration of the pa is: output power accuracy, ACLR, and power consumption. Wherein, ACLR is a key index for measuring the nonlinear distortion of the whole radio frequency unit, and the ACLR is measured by power difference, and the unit is dB. Referring to fig. 6, fig. 6 is a diagram illustrating a test result of an exemplary ACLR index according to an embodiment of the present invention. The specific ACLR index is X-Y1 (dB) on the left and X-Y2 (dB) on the right. In the overall performance of the radio frequency unit, the ACLR index performance is the final verification standard of the radio frequency performance of the power amplifier.
In the implementation process, when the method is used for calibrating the base station radio frequency unit power amplifier, firstly, the power is powered on for initialization, and initial power amplifier grid voltage calibration is completed. Then selecting the output power
Figure 365526DEST_PATH_IMAGE012
Selecting power amplifier
Figure 938590DEST_PATH_IMAGE015
Selecting power amplifier
Figure 314339DEST_PATH_IMAGE001
. Configuration of
Figure 580235DEST_PATH_IMAGE020
Parameters, simultaneously establishing carrier waves according to the maximum bandwidth, and adjusting the gain of a transmitting link to reach
Figure 923492DEST_PATH_IMAGE012
And measuring the ACLR performance, and judging whether the ACLR performance reaches the standard. Compared with the traditional calibration method adopting peak power as the measurement standard, the method directly adopts the final linearization performance index ACLR as the final measurement standard, and avoids performance excess and overlarge power consumption caused by the redundancy of the peak power. If the ACLR performance reaches the standard, the calibration is finished, and the current performance is recorded
Figure 565825DEST_PATH_IMAGE020
And on the contrary, if the ACLR performance does not reach the standard, proper steps are selected for combined test to finish calibration, and the calibration method absorbs the device uncertainty of the power amplifier, thereby indirectly ensuring that a device with lower power can be selected when the power amplifier is selected, and reducing the cost. On the premise of meeting the accuracy of output power, the method takes the ACLR and the power consumption as calibration targets, and simultaneously considers the time cost of actual production calibration and the error of measurementAnd selecting proper steps to carry out combined test, and then making a judgment according to a combined test result to finish calibration. The aim of forming a global optimization calibration scheme by taking yield improvement, cost reduction and power consumption reduction as targets based on the overall requirements of the radio frequency unit is fulfilled, and therefore the competitiveness of products is improved.
In the calibration process, the power amplifier of the radio frequency unit is usually a Doherty power amplifier, which is divided into an average power amplifier and a peak power amplifier, and the peak power amplifier is recommended to be adjusted in the calibration process
Figure 45348DEST_PATH_IMAGE034
To do so
Figure 731413DEST_PATH_IMAGE035
Is common to both the average and peak power amplifiers. Without adjusting the average power amplifier
Figure 561966DEST_PATH_IMAGE036
On the one hand, the time for calibration is reduced, and on the other hand, the peak output capability of the overall power amplifier is basically dependent on the peak power amplifier.
Referring to fig. 4, fig. 4 is a diagram illustrating a relationship between a typical power amplifier Vd and power consumption under the same output power according to an embodiment of the present invention. This approach reduces the overall average power performance in terms of the power consumption of the overall batch product. The average power consumption of the whole product can be reduced by about 5 percent in the actual batch product.
Referring to fig. 3, fig. 3 is a flowchart illustrating another calibration method for a power amplifier of a radio frequency unit of a base station according to an embodiment of the invention. In some embodiments of this embodiment, the step S110 includes:
obtained and preset according to a database
Figure 476833DEST_PATH_IMAGE017
Setting the leakage voltage of the power amplifier and simultaneously reading the preset static working current of the power amplifier in the database
Figure 76441DEST_PATH_IMAGE030
；
Scanning a preset grid voltage range until a corresponding leakage current is obtained
Figure 431943DEST_PATH_IMAGE031
；
Based on the leakage current, obtaining
Figure 749792DEST_PATH_IMAGE019
，
Figure 468349DEST_PATH_IMAGE019
Is the initial calibration result. Thus completing the initial power amplifier grid voltage calibration.
In some embodiments of the present invention, the step S150 includes:
configuration of
Figure 922464DEST_PATH_IMAGE020
Establishing a carrier wave according to the maximum bandwidth and setting a numerical control attenuation value to a preset value by using the parameter;
gradually adjusting the numerical control attenuation value to reach the power by taking 1dB as step according to the power read by the instrument
Figure 701064DEST_PATH_IMAGE032
Then, according to the power read by the instrument, the numerical control attenuation value is gradually adjusted by taking 0.1dB as step to reach the power
Figure 489898DEST_PATH_IMAGE033
；
When the power reaches
Figure 277725DEST_PATH_IMAGE033
And stopping adjusting the numerical control attenuation value and waiting for preset time to ensure stable performance.
In some embodiments of this embodiment, the predetermined time is 20 seconds. Thereby ensuring stable performance.
In some embodiments of this embodiment, the step of measuring ACLR performance includes:
ACLR performance was measured using a standard template of the spectrometer.
Specifically, the spectrometer is a general instrument for testing the spectrum of the radio frequency signal, and the ACLR has a standard test template according to different carrier widths.
In some embodiments of this embodiment, the step of determining whether the ACLR performance meets the standard includes:
acquiring a calibration reference value;
and judging whether the ACLR performance reaches the standard or not according to the calibration reference value.
In some embodiments of this embodiment, the calibration reference value comprises
Figure 586347DEST_PATH_IMAGE019
is-4.5V,
Figure 535848DEST_PATH_IMAGE017
Is 44V.
Referring to fig. 7, fig. 7 is a block diagram illustrating a calibration system for a power amplifier of a base station rf unit according to an embodiment of the present invention. The embodiment of the application provides a calibration system for a base station radio frequency unit power amplifier, which comprises:
the power amplifier grid voltage calibration module 110 is used for responding to power-on initialization operation and completing initial power amplifier grid voltage calibration;
an output power selection module 120 for selecting output power
Figure 47863DEST_PATH_IMAGE012
Wherein, in the step (A),
Figure 373802DEST_PATH_IMAGE013
，
Figure 802509DEST_PATH_IMAGE014
a rated power value for normal output;
a power amplifier Vd selecting module 130 for selecting a power amplifier
Figure 922912DEST_PATH_IMAGE015
Wherein, in the step (A),
Figure 437070DEST_PATH_IMAGE016
，
Figure 550389DEST_PATH_IMAGE017
is the minimum drain voltage;
power amplifier Vg selecting module 140 for selecting power amplifier
Figure 833602DEST_PATH_IMAGE001
Wherein, in the step (A),
Figure 390486DEST_PATH_IMAGE018
，
Figure 126360DEST_PATH_IMAGE019
is the minimum base voltage;
a link gain adjustment module 150 for configuring
Figure 276326DEST_PATH_IMAGE020
Parameters, simultaneously establishing carrier waves according to the maximum bandwidth, and adjusting the gain of a transmitting link to reach
Figure 679625DEST_PATH_IMAGE012
；
A performance measuring module 160 for measuring the ACLR performance, determining whether the ACLR performance reaches the standard, if the ACLR performance reaches the standard, indicating that the calibration is completed, and recording the current ACLR performance
Figure 407410DEST_PATH_IMAGE020
A parameter;
a performance judgment module 170 for utilizing the formula if the ACLR performance does not reach the standard
Figure 365001DEST_PATH_IMAGE021
Adjustment of
Figure 836434DEST_PATH_IMAGE022
Value, if adjusted
Figure 77928DEST_PATH_IMAGE022
Value satisfies
Figure 976614DEST_PATH_IMAGE023
Then the power amplifier Vg selection module 140 is returned, if not, the power amplifier Vg selection module 140 is returned
Figure 687081DEST_PATH_IMAGE023
Then use the formula
Figure 696626DEST_PATH_IMAGE024
Adjustment of
Figure 294091DEST_PATH_IMAGE025
Value, and at this time
Figure 629258DEST_PATH_IMAGE022
The value is still the initial value 0;
an adjusting module 180 for adjusting if
Figure 561442DEST_PATH_IMAGE025
Value satisfies
Figure 374677DEST_PATH_IMAGE026
Then returns to the power amplifier Vd selection module 130, if not, returns to
Figure 341496DEST_PATH_IMAGE026
Then use the formula
Figure 565673DEST_PATH_IMAGE027
Adjustment of
Figure 516311DEST_PATH_IMAGE028
A value, and when G = D =0;
a calibration failure indication module 190 for indicating if adjusted
Figure 867658DEST_PATH_IMAGE028
Value satisfies
Figure 688984DEST_PATH_IMAGE029
Then the output power selection module 120 is returned to, if not satisfied
Figure 582597DEST_PATH_IMAGE029
It indicates that the calibration fails this time.
In the implementation process, when the system is used for calibrating the power amplifier of the radio frequency unit of the base station, firstly, the power is electrified and initialized, and the initial power amplifier grid voltage calibration is completed. Then selecting the output power
Figure 489373DEST_PATH_IMAGE012
Selecting power amplifier
Figure 644411DEST_PATH_IMAGE015
Selecting power amplifier
Figure 585822DEST_PATH_IMAGE001
. Configuration of
Figure 168113DEST_PATH_IMAGE020
Parameters, simultaneously establishing carrier waves according to the maximum bandwidth, and adjusting the gain of a transmitting link to reach
Figure 811453DEST_PATH_IMAGE012
And measuring the ACLR performance, and judging whether the ACLR performance reaches the standard. Compared with the traditional calibration method adopting peak power as the measurement standard, the method directly adopts the final linearization performance index ACLR as the final measurement standard, and avoids performance excess and overlarge power consumption caused by the redundancy of the peak power. If the ACLR performance reaches the standard, the calibration is finished, and the current performance is recorded
Figure 504602DEST_PATH_IMAGE020
And on the contrary, if the ACLR performance does not reach the standard, proper steps are selected for combined test to finish calibration, and the calibration system absorbs the device uncertainty of the power amplifier, so that a device with lower power can be selected when the power amplifier is selected, and the cost is reduced. The system meets the accuracy of output powerUnder the premise of taking ACLR and power consumption as calibration targets, considering the time cost of actual production calibration and the measurement error, selecting proper steps to carry out combined test, and then making a decision according to the combined test result to finish calibration. The aim of forming a global optimization calibration scheme by aiming at improving the yield, reducing the cost and reducing the power consumption based on the overall requirement of the radio frequency unit is fulfilled, and therefore the competitiveness of the product is improved.
Referring to fig. 5, fig. 5 is a schematic structural block diagram of an electronic device according to an embodiment of the present disclosure. The electronic device comprises a memory 101, a processor 102 and a communication interface 103, wherein the memory 101, the processor 102 and the communication interface 103 are electrically connected to each other directly or indirectly to realize data transmission or interaction. For example, the components may be electrically connected to each other via one or more communication buses or signal lines. The memory 101 may be used to store software programs and modules, such as program instructions/modules corresponding to the calibration system for the power amplifier of the base station rf unit provided in the embodiments of the present application, and the processor 102 executes the software programs and modules stored in the memory 101 to thereby execute various functional applications and data processing. The communication interface 103 may be used for communicating signaling or data with other node devices.
The Memory 101 may be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Read-Only Memory (EPROM), an electrically Erasable Read-Only Memory (EEPROM), and the like.
The processor 102 may be an integrated circuit chip having signal processing capabilities. The Processor 102 may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but also Digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components.
It will be appreciated that the configuration shown in fig. 5 is merely illustrative and that the electronic device may include more or fewer components than shown in fig. 5 or have a different configuration than shown in fig. 5. The components shown in fig. 5 may be implemented in hardware, software, or a combination thereof.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist alone, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (10)

1. A calibration method for a base station radio unit power amplifier is characterized by comprising the following steps:
s110: responding to power-on initialization operation to finish initial power amplifier grid voltage calibration;
s120: selecting output power
Figure 869415DEST_PATH_IMAGE001
Wherein, in the process,
Figure 955183DEST_PATH_IMAGE002
，
Figure 510929DEST_PATH_IMAGE003
a rated power value for normal output;
s130: selection power amplifier
Figure 906007DEST_PATH_IMAGE004
Wherein, in the step (A),
Figure 547204DEST_PATH_IMAGE005
，
Figure 702242DEST_PATH_IMAGE006
is the minimum drain voltage;
s140: selection power amplifier
Figure 128806DEST_PATH_IMAGE007
Wherein, in the process,
Figure 976676DEST_PATH_IMAGE008
，
Figure 370749DEST_PATH_IMAGE009
is the minimum base voltage;
s150: configuration of
Figure 63898DEST_PATH_IMAGE010
Parameters, and simultaneously, carrier waves are established according to the maximum bandwidth, and the gain of a transmitting link is adjusted to reach
Figure 859816DEST_PATH_IMAGE001
；
S160: measuring ACLR performance, judging whether the ACLR performance reaches the standard, if the ACLR performance reaches the standard, indicating that the calibration is finished, and simultaneously recordingAt present
Figure 862276DEST_PATH_IMAGE010
A parameter;
s170: if the ACLR performance does not reach the standard, a formula is utilized
Figure 478065DEST_PATH_IMAGE011
Adjustment of
Figure 974905DEST_PATH_IMAGE012
Value, if adjusted
Figure 107553DEST_PATH_IMAGE012
Value satisfies
Figure 31647DEST_PATH_IMAGE013
Then the process returns to S140, if not
Figure 665890DEST_PATH_IMAGE013
Then use the formula
Figure 700842DEST_PATH_IMAGE014
Adjustment of
Figure 205773DEST_PATH_IMAGE015
Value, and at this time
Figure 550036DEST_PATH_IMAGE012
The value remains as initial value 0;
s180: if adjusted
Figure 140417DEST_PATH_IMAGE015
Value satisfies
Figure 979060DEST_PATH_IMAGE016
Then, the process returns to S130, if not
Figure 604076DEST_PATH_IMAGE016
Then use the formula
Figure 620705DEST_PATH_IMAGE017
Adjustment of
Figure 963962DEST_PATH_IMAGE018
A value, and when G = D =0;
s190: if adjusted
Figure 340716DEST_PATH_IMAGE018
Value satisfies
Figure 820239DEST_PATH_IMAGE019
Then, the process returns to S120, if not
Figure 506304DEST_PATH_IMAGE019
If so, the calibration fails.
2. The method for calibrating a power amplifier of a radio unit of a base station according to claim 1, wherein said step S110 comprises:
obtained and preset according to a database
Figure 71278DEST_PATH_IMAGE006
Setting the leakage voltage of the power amplifier, and simultaneously reading the preset static working current of the power amplifier in the database
Figure 517303DEST_PATH_IMAGE020
；
Scanning a preset grid voltage range until a corresponding leakage current is obtained
Figure 116911DEST_PATH_IMAGE021
；
According to the leakage current, obtaining
Figure 724610DEST_PATH_IMAGE009
The above-mentioned
Figure 259103DEST_PATH_IMAGE009
Is the initial calibration result.
3. The method of claim 1, wherein the step S150 comprises:
configuration of
Figure 243240DEST_PATH_IMAGE010
Establishing a carrier wave according to the maximum bandwidth and setting a numerical control attenuation value to a preset value by using the parameter;
gradually adjusting the numerical control attenuation value to reach the power by taking 1dB as step according to the power read by the instrument
Figure 431776DEST_PATH_IMAGE022
Then, the numerical control attenuation value is gradually adjusted to reach the power by taking 0.1dB as step according to the power read by the instrument
Figure 475955DEST_PATH_IMAGE023
；
When the power reaches
Figure 999209DEST_PATH_IMAGE023
And stopping adjusting the numerical control attenuation value and waiting for preset time to ensure stable performance.
4. The method of claim 3, wherein the predetermined time is 20 seconds.
5. The method of claim 1, wherein the step of measuring the ACLR performance comprises:
ACLR performance was measured using a standard template of the spectrometer.
6. The method of claim 1, wherein the step of determining whether the ACLR performance meets the standard comprises:
acquiring a calibration reference value;
and judging whether the ACLR performance reaches the standard or not according to the calibration reference value.
7. The method of claim 6, wherein the calibration reference comprises a calibration reference value
Figure 255878DEST_PATH_IMAGE009
is-4.5V,
Figure 830079DEST_PATH_IMAGE006
And was 44V.
8. A calibration system for a base station radio unit power amplifier, comprising:
the power amplifier grid voltage calibration module is used for responding to power-on initialization operation and completing initial power amplifier grid voltage calibration;
an output power selection module for selecting output power
Figure 779580DEST_PATH_IMAGE001
Wherein, in the step (A),
Figure 557175DEST_PATH_IMAGE002
，
Figure 617535DEST_PATH_IMAGE003
a rated power value for normal output;
a power amplifier Vd selection module for selecting a power amplifier
Figure 46242DEST_PATH_IMAGE024
Wherein, in the process,
Figure 432224DEST_PATH_IMAGE005
，
Figure 930070DEST_PATH_IMAGE006
is the minimum drain voltage;
power amplifier Vg selecting module for selecting power amplifier
Figure 794121DEST_PATH_IMAGE007
Wherein, in the step (A),
Figure 77335DEST_PATH_IMAGE008
，
Figure 368639DEST_PATH_IMAGE009
is the minimum base voltage;
a link gain adjustment module to configure
Figure 852316DEST_PATH_IMAGE010
Parameters, simultaneously establishing carrier waves according to the maximum bandwidth, and adjusting the gain of a transmitting link to reach
Figure 520058DEST_PATH_IMAGE001
；
A performance measurement module for measuring ACLR performance, judging whether the ACLR performance reaches the standard, if the ACLR performance reaches the standard, indicating that the calibration is completed, and simultaneously recording the current performance
Figure 923358DEST_PATH_IMAGE010
A parameter;
a performance judgment module for utilizing a formula if the ACLR performance does not reach the standard
Figure 385563DEST_PATH_IMAGE011
Adjustment of
Figure 608734DEST_PATH_IMAGE012
Value, if adjusted
Figure 329434DEST_PATH_IMAGE012
Value satisfies
Figure 587240DEST_PATH_IMAGE013
Then returning to the power amplifier Vg selection module, if not, then returning to the power amplifier Vg selection module
Figure 954768DEST_PATH_IMAGE013
Then use the formula
Figure 930814DEST_PATH_IMAGE014
Adjustment of
Figure 691091DEST_PATH_IMAGE015
Value, and at this time
Figure 537824DEST_PATH_IMAGE012
The value is still the initial value 0;
an adjusting module for adjusting
Figure 872990DEST_PATH_IMAGE015
Value satisfies
Figure 805174DEST_PATH_IMAGE016
Returning to the power amplifier Vd selection module if the Vd is not satisfied
Figure 618409DEST_PATH_IMAGE016
Then use the formula
Figure 568917DEST_PATH_IMAGE017
Adjustment of
Figure 809405DEST_PATH_IMAGE018
A value, and when G = D =0;
a calibration failure indication module for indicating if the calibration is adjusted
Figure 228885DEST_PATH_IMAGE018
Value satisfies
Figure 845811DEST_PATH_IMAGE019
Then returning to the output power selection module, if not, returning to the output power selection module
Figure 414940DEST_PATH_IMAGE019
If so, the calibration fails.
9. An electronic device, comprising:
a memory for storing one or more programs;
a processor;
the one or more programs, when executed by the processor, implement the method of any of claims 1-7.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1-7.
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