CN109450564B - A kind of PA sends the calibration of power and compensation method - Google Patents
A kind of PA sends the calibration of power and compensation method Download PDFInfo
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- CN109450564B CN109450564B CN201811224267.3A CN201811224267A CN109450564B CN 109450564 B CN109450564 B CN 109450564B CN 201811224267 A CN201811224267 A CN 201811224267A CN 109450564 B CN109450564 B CN 109450564B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/11—Monitoring; Testing of transmitters for calibration
- H04B17/13—Monitoring; Testing of transmitters for calibration of power amplifiers, e.g. gain or non-linearity
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of PA to send the calibration of power and compensation method, comprising: generates RF transmission power code table by adjusting to RF code word；In the system with PA, code table power measurement is carried out to the center frequency point in required frequency range with benchmark PA voltage at normal temperature, PA is depicted in entire RF and sends the curve in power code table, including linear region and inelastic region；RF is carried out to different frequent points, different temperatures and difference PA voltage in linear region and sends the calibration of power code table, generates the power difference offset relative to center frequency point, room temperature and reference voltage；By making an inventory compensation code table, the power difference for needing to increased or decrease is calculated, sliding RF sends the corresponding stepping of power code table to complete quickly to compensate.The present invention is suitable for the linear zone and inelastic region of PA, and the nonlinear feature of PA will not lose in compensation, compensate not only exact arithmetic amount but also small, and opposite conventional calibration complexity substantially reduces.
Description
Technical field
The present invention relates to the PA of technical field of satellite communication more particularly to satellite handheld terminal (Power Amplifier,
Power amplifier) send the calibration of power and compensation method.
Background technique
Satellite handheld terminal is the essential handheld device of dual-use satellite communication.At present hand-held ICBM SHF satellite terminal by
In sending, power is big, and power accuracy requirements are high, needs to consider power problems.It is attached that existing PA chip sends power in maximum substantially
Closely enter nonlinear area to work.Consider further that different frequent points, different temperatures, different PA voltages, factory's center frequency at normal temperature
The code table calibration of point has been not applied for the nonlinear area of PA using traditional compensation method.With regard to needing to increase many calibrations
Step and compensation for calibrating errors code table describe the non-linear performance under different temperatures, different frequent points and different PA voltages of PA.To
The period of plant produced can be greatly increased.Simultaneously when application compensation power, since the complexity of compensation code table improves, system balance
Algorithmic procedure also correspondinglys increase, and increases software complexity and the processing time of handheld terminal.
Summary of the invention
The purpose of the present invention is to provide a kind of PA to send the calibration of power and compensation method, suitable for the linear zone of PA and non-
Linear zone.
Realizing the technical solution of above-mentioned purpose is:
A kind of PA sends the calibration of power and compensation method, comprising:
RF transmission power code table is generated by adjusting to RF (radio frequency) code word；
In the system with PA, code is carried out to the center frequency point in required frequency range with benchmark PA voltage at normal temperature
Apparent power measurement depicts PA in entire RF and sends the curve in power code table, including linear region and inelastic region；
RF is carried out to different frequent points, different temperatures and difference PA voltage in linear region and sends the calibration of power code table, it is raw
At the power difference offset relative to center frequency point, room temperature and reference voltage；
By making an inventory compensation code table, the power difference for needing to increased or decrease is calculated, it is corresponding that sliding RF sends power code table
Stepping complete quickly to compensate.
Preferably, RF transmission power code table is generated by adjusting to RF code word, protects the power difference between every two grades
It holds unanimously, and the power difference between two grades is made to be less than requirement of the system to the precision for sending power.
Preferably, the optimization and generate RF send power code table, comprising:
Power code table individually is sent to RF and sends power test, gain control word is sent to RF and is studied；
Power code table is sent by the RF that test data forms a bracing cable: guarantee room temperature, center frequency point and benchmark first
Under voltage RF send power code table it is linear, this is directly obtained from test data, then under different temperatures in test data, no
Transmission power under same frequency and different voltages compensates code table, guarantees that RF sends power code table in different temperatures, different frequency
Keep linear with different voltages.
Preferably, it is described to RF send gain control word study, refer to: study different control words different temperatures,
Under different frequency and different voltages, whether consistent power is sent.
Preferably, center frequency point carries out transmission power measurement to code table in room temperature, reference voltage and frequency band, depicts PA
Power curve, and the transmission offset data according to Test data generation with PA system.
Preferably, it is exactly according to different offset datas that sliding RF, which sends power code table, and the increasing of mobile radio code table adds deduct
The transmission power of small whole system.
The beneficial effects of the present invention are: the present invention is applicable in the linear zone and inelastic region of PA.It can not increase calibration
On the basis of time and calibration complexity, meet the required precision that power is sent under varying environment.It can simplify to production procedure
Complexity, reduce complexity, power consumption and the cost of entire hand-held scheme, guarantee the consistency of batch production terminal.
Detailed description of the invention
Fig. 1 is the flow chart that PA of the invention sends the calibration of power and compensation method；
Fig. 2 is the schematic diagram that RF sends power code table comparison RF output power in the present invention；
Fig. 3 is the schematic diagram that RF sends power code table comparison PA output power in the present invention；
Fig. 4 is the schematic diagram that different frequency sends power difference with center frequency point in the present invention；
Fig. 5 is that center frequency point RF sends the corresponding power of power code table and the RF transmission power code table of minimum frequency point is corresponding
The contrast schematic diagram of power.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings.
Referring to Fig. 1, PA of the invention sends the calibration of power and compensation method, including the following steps:
Step S1 optimizes and generates RF transmission power code table, it may be assumed that by adjusting RF code word (by adjusting RF power phase
Close register) RF transmission power code table is generated, it is consistent the power difference between every two grades, and make the function between two grades
Rate difference is less than requirement of the system to the precision for sending power.It is optimized as shown in Fig. 2, sending power code table to RF, makes RF
Output sends power linear, and power stepping is mono- grade of general 0.2dB in Fig. 1.POWER is to send power, and dB is to send power
Relative unit, dBm be send power absolute unit.
Specifically, comprising:
Power code table individually is sent to RF and sends power test, gain control word is sent to RF and is studied, it may be assumed that research is not
With control word under different temperatures, different frequency and different voltages, whether consistent power is sent.
Power code table is sent by the RF that test data forms a bracing cable: guarantee room temperature, center frequency point and benchmark first
Under voltage RF send power code table it is linear, this is directly obtained from test data, then under different temperatures in test data, no
Transmission power under same frequency and different voltages compensates code table, guarantees that RF sends power code table in different temperatures, different frequency
Keep linear with different voltages.
Step S2, in the system with PA, at normal temperature with benchmark PA voltage to the center frequency in required frequency range
Point carry out code table power measurement depicts PA in entire RF and sends the curve in power code table, including linear region and non-linear
Area.
Power output after measurement room temperature, benchmark PA voltage, the corresponding PA of center frequency point code table when factory calibration.Such as Fig. 3, from
Find out in figure and enter inelastic region in 33dBm or so PA, power is linear unlike being exported RF.The step mainly depicts
The power curve of PA, behind compensate when to guarantee that this power curve does not change.
Step S3 carries out RF to different frequent points, different temperatures and difference PA voltage in linear region and sends power code table
Calibration generates the power difference offset relative to center frequency point, room temperature and reference voltage.
In factory calibration, other frequency point sampling points send the difference that power sends power with centre frequency in measurement frequency range,
It is recorded in compensation table.As shown in Figure 4.FREQ indicates frequency.
Similarly, it measures under different temperatures and different PA voltages, each power is obtained with the power difference of reference voltage under room temperature
Power compensating value is sent under the transmission power compensating value and different voltages of different temperatures.Different temperatures and different voltages offset pair
A collection of plank is more consistent.So the two compensation tables are completed in factory, it is that prior survey is good, is suitable for same
Criticize plank.These compensation tables centainly need to obtain in the measurement of the linear region PA, otherwise cannot characterize different frequency, different voltages and
The characteristic of the power difference of different temperatures.
Step S4, being different from step S1-S3 all is completed before terminal or equipment factory, and step S4 is to actually use
In, by making an inventory compensation code table, the power difference for needing to increased or decrease is calculated, sliding RF sends the corresponding stepping of power code table
It completes quickly to compensate, makes to send the power accuracy that power reaches requirement in the actual environment.
On the basis of above, the feasibility of sliding radio frequency code table just can guarantee.Sliding RF and sending power code table is exactly basis
Different offset datas, mobile radio code table increased or decrease the transmission power of whole system.It is more sliding than tradition to slide radio frequency code table
Dynamic power code table more adapts to the power compensation of the inelastic region PA, reaches the accuracy for sending power.
Fig. 5 is that center frequency point RF sends the corresponding power (a following curve and one, left side vertical line) of power code table and most
The RF of low frequency point sends the corresponding power (curve above and one, the right vertical line) of power code table, it can be seen that different frequent points
It is not consistent that PA enters nonlinear code table position, but enters in different capacity point.If the power measured with center frequency point
Value ignores that PA enters this different information of nonlinear position to compensate the power of low frequency point, brings compared with large compensation mistake
Accidentally.And low frequency point is compensated by translation radio frequency code table position, since RF sends the linear it is known that do not destroy again of power code table
PA linearity curve value can increase accuracy of the power under different scenes to the full extent.Emphasized before must be in PA line
Property area test different frequency, different temperatures and different voltages power compensating value are also exactly this reason.Guarantee PA power curve function
Rate code table is constant, by translating the radio frequency code table of known power stepping, carries out the power compensation of different scenes.
Conventional compensation scheme be according to different frequencies, the offset of different temperatures etc. in power code table downward or upward
Search to power.Once PA enter it is non-linear, send power different frequent points enter nonlinear position be it is different,
This traditional compensation for calibrating errors mode just introduces very big error.This programme is due to ensure that RF sends the line of power code table
Property, PA nonlinear characteristic is depicted in center frequency point when calibration, and the such as frequency compensation in other dimensions passes through translation code table
It is not the corresponding transmission power code table of translation code table to compensate, so nonlinear feature of PA will not lose in compensation,
Compensate not only exact arithmetic amount but also small.Opposite conventional calibration complexity substantially reduces.
Above embodiments are used for illustrative purposes only, rather than limitation of the present invention, the technology people in relation to technical field
Member, without departing from the spirit and scope of the present invention, can also make various transformation or modification, therefore all equivalent
Technical solution also should belong to scope of the invention, should be limited by each claim.
Claims (4)
1. a kind of PA sends the calibration of power and compensation method characterized by comprising
Optimize and generate RF and send power code table, it may be assumed that generates RF transmission power code table by adjusting to RF code word, make at every two grades
Between power difference be consistent, and power difference between two grades is made to be less than requirement of the system to the precision for sending power；
In the system with PA, code table function is carried out to the center frequency point in required frequency range with benchmark PA voltage at normal temperature
Rate measurement depicts PA in entire RF and sends the curve in power code table, including linear region and inelastic region；
RF is carried out to different frequent points, different temperatures and difference PA voltage in linear region and sends the calibration of power code table, generates phase
For the power difference offset of center frequency point, room temperature and reference voltage；
By making an inventory compensation code table, the power difference for needing to increased or decrease is calculated, sliding RF sends power code table and walks accordingly
Come in complete quickly to compensate；
The optimization simultaneously generates RF transmission power code table, comprising:
Power code table individually is sent to RF and sends power test, gain control word is sent to RF and is studied；
Power code table is sent by the RF that test data forms a bracing cable: guarantee room temperature, center frequency point and reference voltage first
Lower RF sends that power code table is linear, this is directly obtained from test data, then under different temperatures in test data, different frequencies
Transmission power under rate and different voltages compensates code table, guarantees that RF sends power code table in different temperatures, different frequency and not
Keep linear with voltage.
2. PA according to claim 1 sends the calibration of power and compensation method, which is characterized in that described send to RF increases
Beneficial control word is studied, and is referred to: studying different control words under different temperatures, different frequency and different voltages, sending power is
It is no consistent.
3. PA according to claim 1 sends the calibration of power and compensation method, which is characterized in that in room temperature, reference voltage
Transmission power measurement is carried out to code table with center frequency point in frequency band, depicts the power curve of PA, and according to Test data generation
Transmission offset data with PA system.
4. PA according to claim 3 sends the calibration of power and compensation method, which is characterized in that sliding RF sends power code
Table is exactly according to different offset datas, and mobile radio code table increaseds or decreases the transmission power of whole system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811224267.3A CN109450564B (en) | 2018-10-19 | 2018-10-19 | A kind of PA sends the calibration of power and compensation method |
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| CN201811224267.3A CN109450564B (en) | 2018-10-19 | 2018-10-19 | A kind of PA sends the calibration of power and compensation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111220897B (en) * | 2020-02-11 | 2022-01-21 | 南京派格测控科技有限公司 | Power calibration method, device and system and test system |
| CN116106812A (en) * | 2023-04-12 | 2023-05-12 | 北京中科睿信科技有限公司 | Signal source rapid calibration method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1918798A (en) * | 2004-02-12 | 2007-02-21 | 松下电器产业株式会社 | Transmission power control device |
| CN103095317A (en) * | 2011-10-28 | 2013-05-08 | 美国博通公司 | Rf Transceiver With Calibrated Pre-distortion And Methods For Use Therewith |
| CN104661294A (en) * | 2013-11-25 | 2015-05-27 | 展讯通信（上海）有限公司 | Calibration method and calibration device of transmitter in communication system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105450183A (en) * | 2014-07-31 | 2016-03-30 | 展讯通信（上海）有限公司 | Temperature compensation method and device for linear power amplifier |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1918798A (en) * | 2004-02-12 | 2007-02-21 | 松下电器产业株式会社 | Transmission power control device |
| CN103095317A (en) * | 2011-10-28 | 2013-05-08 | 美国博通公司 | Rf Transceiver With Calibrated Pre-distortion And Methods For Use Therewith |
| CN104661294A (en) * | 2013-11-25 | 2015-05-27 | 展讯通信（上海）有限公司 | Calibration method and calibration device of transmitter in communication system |
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Address after: Room 372, building 3, 333 Hongqiao Road, Xuhui District, Shanghai 200233 Patentee after: Xiaotang Technology (Shanghai) Co.,Ltd. Address before: Room 372, building 3, 333 Hongqiao Road, Xuhui District, Shanghai 200233 Patentee before: XIAOTANG TECHNOLOGY (SHANGHAI) Co.,Ltd. |