CN105720931A - Adaptive feedforward pre-distortion system and method - Google Patents
Adaptive feedforward pre-distortion system and method Download PDFInfo
- Publication number
- CN105720931A CN105720931A CN201610039942.XA CN201610039942A CN105720931A CN 105720931 A CN105720931 A CN 105720931A CN 201610039942 A CN201610039942 A CN 201610039942A CN 105720931 A CN105720931 A CN 105720931A
- Authority
- CN
- China
- Prior art keywords
- power amplifier
- signal
- distortion
- end signal
- output end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
- H03F1/3247—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits using feedback acting on predistortion circuits
-
- 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
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/3223—Modifications of amplifiers to reduce non-linear distortion using feed-forward
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
The invention provides an adaptive feedforward pre-distortion system and method. The method comprises the following steps: collecting a power amplifier input end signal and a power amplifier output end signal; adjusting phases of the acquired power amplifier input end signal and the acquired power amplifier output end signal, then adding the power amplifier input end signal and the power amplifier output end signal, and obtaining a distortion component of a power amplifier; and introducing the distortion component into the power amplifier input end and used for counteracting distortion of the power amplifier. The adaptive feedforward pre-distortion system and method provided by the invention can realize pre-distortion treatment of signals and non-distortion amplification of the signals for any frequency and power, and realize an adaptive function; besides, the distortion component of the power amplifier obtained in the invention is the distortion component of the power amplifier itself, and the linearization effect is better than the feedforward method.
Description
Technical field
The present invention relates to a kind of adaptive feedforward pre-distortion system and method, belong to communication technical field.
Background technology
When the input of power amplifier amplifies multi-tone signal, it is bound to produce harmful intermodulation product, and along with power amplifier output constantly close to its power saturation point, this non-linear distortion will become increasingly severe.General back-off 1dB, third order intermodulation improves 2dB, and traditional mode is to make power amplifier be operated in rollback state to meet linearity, but rollback method improves about IMD3 to-50dBc, then rollback is without improving IMD3.So rollback method cannot be adopted for the system that linearity is higher.Still further aspect, the efficiency of power amplifier sharply declines as well as the increase of rollback amount, this means that being operated in fall-back mode necessarily makes the efficiency of power amplifier reduce, power amplifier is the module that in system, power consumption is maximum, so this power amplifier scheme being operated in deep rollback state can make ineffective systems, in most cases, it not optimal case.
Introduce pre-distortion technology and then can well solve the contradiction of the above-mentioned linearity and efficiency.Briefly, predistortion is exactly add the system that a characteristic is just the opposite with the mission nonlinear distortion including power amplifier artificially, compensate, thus improving the linearity of power amplifier, under same linearity, power amplifier can be operated in close to saturation power point position, and such power amplification efficiency can be greatly improved, thus system effectiveness also can improve accordingly, reduce system operation cost.It addition, power amplification efficiency is high, power consumption is little, then can reduce heat radiation, power supply and final stage tube cost etc. simultaneously, and many benefits of pre-distortion technology have made one of linearization technique of present main flow.
From predistorter location, predistortion can be divided into radio frequency (RF), intermediate frequency (IF) and base band predistortion three kinds, it is however generally that, again the above two are referred to as analog predistortion, the third is called digital pre-distortion.Radio frequency distortion and intermediate frequency pre-distortion technology are all realized by analog device, have and realize simple, less expensive, and it is suitable for the advantage such as high frequency and wide bandwidth, but there is the shortcoming being difficult to process high-order nonlinear distortion and self-adaptative adjustment, therefore can only achieve medium linearisation degree.
Fig. 1 is a radio frequency distortion solution principle schematic diagram simplified: RFin is non-distorted signal, a degree of distortion (see RFfb signal) can be produced after power amplifier, after predistortion chip collects distorted signal (RFfb signal) by bonder 3, compare with the RFin signal collected by bonder 1, computing obtains the compensation signal of distortion component, the input of power amplifier it is coupled to by bonder 2, ideally, power amplifier one undistorted RFout signal (see RFout in figure) of output can be made.
Feed Forward Power Amplifier method schematic diagram is as in figure 2 it is shown, it is made up of two loops.First loop is for the counteracting of carrier signal, the extraction of intermodulation signal, thus is called carrier cancellation loop.Second loop is for the counteracting of intermodulation signal, it is called that intermodulation offsets ring at the first loop, input two-frequency signal, it is divided into A, B two paths of signals through bonder C3, A road signal is amplified by main power amplifier, its output signal couples a part of power then through bonder C1 and sends into hybrid coupler H, signal delayed line τ 1 in B road sends into bonder H, postpone by adjusting the amplitude of signal, phase place and B road in A road, the two-way main signal amplitude making entrance hybrid coupler H is equal, opposite in phase and offset, the signal obtained is called error signal.In theory, not comprising original two-frequency signal in error signal, the intermodulation distortion signal substantially produced by main amplifier forms.Second loop, main power amplifier output signal, bonder C2 is sent into after bonder C1 and delay line τ 2, the error signal exported by bonder H in loop 1 is through amplitude-phase adjustment, bonder C2 is sent into again through error amplifier after being amplified, in bonder C2 the intermodulation component of two paths of signals because of amplitude identical, opposite in phase and offset so that in total output signal, intermodulation component is inhibited.
But it is produce nonlinear distortion component, its distorted characteristic the striking resemblances of not sum power amplification distortion characteristic with the device that one or more nonlinear distortion characteristics is similar with power amplifier nonlinear distortion characteristics in the prior art.It addition, also predistortion function cannot be realized for all power levels, generally can only be optimized for a certain power, therefore only the predistortion effect of Partial Power level is better and very limited.
Summary of the invention
For the problems referred to above of prior art, the invention provides a kind of adaptive feedforward pre-distortion system and method, the undistorted amplification of the pre-distortion of signal, signal can be realized for optional frequency and power, it is achieved adaptation function；And the power amplification distortion component obtained in the present invention is the distortion component of power amplifier itself, linearisation effect is better than feed forward approach.
In order to achieve the above object, the present invention adopts the following technical scheme that a kind of adaptive feedforward pre-distortion method, comprises the steps:
Gather power amplifier (power amplifier) input end signal (fundamental signal) and power amplifier output end signal (feedback signal)；
The described power amplifier input end signal collected is adjusted with power amplifier output end signal and is added, after phase place, the distortion component obtaining power amplifier；
Described distortion component is imported described power amplifier input, for offsetting the distortion of power amplifier.
As further preferably, be 180 ° by the adjusting offset of the described power amplifier input end signal collected Yu described power amplifier output end signal, i.e. anti-phase addition.
As further preferably, the described power amplifier input end signal collected is carried out signal amplitude adjustment with described power amplifier output end signal before being added, makes both power suitable.
As further preferably, power amplifier input is imported after described distortion component is adjusted signal amplitude and phase place, and adjusting the phase place of described distortion component to power amplifier, to export distortion minimum, the adjustment of described distortion component is as follows: the distortion product power that amplitude adjusts power amplifier output cuts the performance number (before not adding predistortion) after power amplifier gain, then adjusts on this basis and makes distortion minimum.
As further preferably, described signal amplitude adjustment includes signal and amplifies or decay.
As further preferably, the signal amplitude adjustment of described power amplifier input end signal and the collection of power amplifier output end signal, amplitude adjustment and distortion component is controlled by same control unit, so that the power amplifier input end signal collected and the power amplifier output end signal power collected are suitable, then can realize any input/output power level, predistortion function under any rollback amount, it is achieved adaptation function.
As further preferably, little stepping increases power amplifier output end signal (feedback signal) power, till making linearisation effect preferably.
A kind of adaptive feedforward pre-distortion system, including as follows:
Signal gathering unit, for gathering power amplifier input end signal (fundamental signal) and power amplifier output end signal (feedback signal) respectively；
Distortion acquiring unit, for being added, after the power amplifier input end signal collected and power amplifier output end signal are adjusted phase place, the distortion component obtaining power amplifier；
Power amplifier (power amplifier), is configured to receive power amplifier input end signal and described distortion component, to offset described power amplification distortion.
As further preferably, described distortion acquiring unit, it is additionally operable to described power amplifier output end signal, the described power amplifier input end signal collected is carried out before being added signal amplitude adjustment, make both power suitable, the adjusting offset of the described power amplifier input end signal collected and described power amplifier output end signal is 180 °, anti-phase addition.
As further preferred, described distortion acquiring unit, it is additionally operable to before importing power amplifier input, carry out described distortion component signal amplitude adjustment and phase place adjustment, and adjusts to power amplifier output distortion minimum.
As further preferably, described distortion acquiring unit, including the signal conditioner with described power amplifier output end signal amplitude adjustment of the power amplifier input end signal for collecting and adjust the electric bridge of described signal phase, phase shifter.The effect of phase shifter and electric bridge is in order to the power amplifier input end signal collected described in making adjusts phase place with described power amplifier output end signal, offsets fundametal compoment, the only remaining distortion component stayed.
As further preferred, described distortion acquiring unit, also include the signal conditioner for the adjustment of distortion component amplitude and the electric bridge adjusted for distortion component signal phase place, phase shifter.
As further preferably, described signal gathering unit, including first, second bonder and first, second power splitter for gathering power amplifier input and output end signal respectively.
As further preferably, described signal gathering unit, also include the power detecting unit of power amplifier input end signal and output end signal, both described power monitoring unit are connected with respective signal gathering unit, and jointly controlled by same control unit with signal conditioner so that the power amplifier input end signal collected and the power amplifier output end signal power collected are suitable.
As further preferably, described in the signal conditioner of power amplifier input end signal, power amplifier output end signal and described distortion component signal that collects controlled by same control unit.
As further preferably, described power detecting unit includes adjustable attenuator, detection tube and analog-digital converter ADC.
As further preferably, described signal conditioner includes signal amplifier or numerical-control attenuator.
Beneficial effects of the present invention is as follows:
1, the power amplification distortion component obtained in the present invention is the distortion component of power amplifier itself, but not obtains with the device simulation of similar power amplification distortion characteristic in prior art, and linearisation effect is more excellent.
2, the power amplifier input collected by power detection guarantee of the present invention is always to maintain consistent with the output end signal power collected, then can realize any input/output power level, the predistortion function under any rollback amount, it is achieved adaptation function.
3, the present invention compares with feed forward approach, and its advantage is: prior art feed forward approach is after first loop obtains the distortion component of power amplifier, and after distortion component is processed, the anti-phase outfan being added to power amplifier is to offset distortion component.The application is after obtaining the distortion component of power amplifier, its anti-phase input that imports to offset distortion component, after application self-adapting technology, can realizing convergence to calculate, as long as attenuator and amplifier stepping are sufficiently small, detecting circuit precision is sufficiently high, gain flatness between feedback signal and power amplifier output is sufficiently small, Circuit responce speed is sufficiently high, and other devices are enough desirable, and the power amplifier output distortion component being operated in any power level can be made in theory to trend towards infinitesimal.That is in theory, linearisation effect of the present invention can be better than feed forward approach.
4, the present invention is compared with the technology such as digital pre-distortion and intermediate frequency predistortion, and its advantage is: need not arrive the feedback network of numeric field or frequency domain；Need not numerous and diverse numerical calculation and signal processing；Do not need the analog predistortion chips such as SC1894, it does not have applying frequency limits.
5, to need to use the device consuming power few for present system, with other domination technology additional power consumptions quite or less.
Accompanying drawing explanation
Fig. 1 is prior art one radio frequency distortion system principle schematic diagram.
Fig. 2 is prior art one Feed Forward Power Amplifier system principle schematic diagram.
Fig. 3 is the embodiment of the present application adaptive feedforward pre-distortion system principle schematic.
In accompanying drawing, labelling is as follows: 1.1-predistortion chip, 1.2-power amplifier, 1.3-bonder 1,1.4-bonder 2,1.5-bonder 3,1.6-chronotron.
A1-main amplifier, A2-error amplifier, B1, B2-gain-phase adjusts, C1, C2, C3-bonder, τ 1, τ 2-delay line, H-hybrid coupler.
3.1-power amplifier, 3.2-controller, 3.11,3.12-bonder, 3.21,3.22-power splitter, 3.31,3.32-adjustable attenuator, 3.41,3.42-detection tube, 3.51,3.52-ADC, 3.61-numerical-control attenuator, 3.62-amplifier, 3.71, the 3.72-phase shifter, 3.81,3.82-electric bridge, 3.9-amplifier, 3.10-chronotron.
Detailed description of the invention
The embodiment of the present application, by providing a kind of adaptive feedforward pre-distortion system and method, can realize the undistorted amplification of the pre-distortion of signal, signal, it is achieved adaptation function for optional frequency and power；And the power amplification distortion component obtained in the present invention is the distortion component of power amplifier itself, linearisation effect is better than feed forward approach.
In order to be better understood from technique scheme, below in conjunction with Figure of description and specific embodiment, technique scheme is described in detail.
The embodiment of the present application provides a kind of adaptive feedforward pre-distortion method, comprises the steps:
Gather power amplifier input end signal (fundamental signal RFcarrier) and power amplifier output end signal (feedback signal RFfeedback)；
The described power amplifier input end signal collected is adjusted with power amplifier output end signal and is added, after phase place, the distortion component obtaining power amplifier；
Described distortion component is imported described power amplifier input, for offsetting the distortion of power amplifier.
The adjusting offset of the described power amplifier input end signal collected and described power amplifier output end signal is 180 °.
The described power amplifier input end signal collected carries out signal amplitude adjustment with described power amplifier output end signal before being added, and makes both power suitable.
Described distortion component imports power amplifier input after adjusting signal amplitude and phase place, and adjusting the phase place of described distortion component to power amplifier, to export distortion minimum, the amplitude adjustment of described distortion component is as follows: the distortion product power that amplitude adjusts power amplifier output cuts the performance number (before not adding predistortion) after power amplifier gain, then adjusts on this basis and makes distortion minimum.
Described signal amplitude adjustment includes signal and amplifies or decay.
The signal amplitude adjustment of described power amplifier input end signal and the collection of power amplifier output end signal, amplitude adjustment and described distortion component is controlled by same control unit, so that the power of the power amplifier input end signal collected and power amplifier output end signal is suitable, then can realize any input/output power level, predistortion function under any rollback amount, it is achieved adaptation function.
Wherein, little stepping increases power amplifier output end signal (feedback signal) power, till making linearisation effect preferably.
As it is shown on figure 3, the embodiment of the present application adaptive feedforward pre-distortion system, including as follows:
Signal gathering unit, for gathering power amplifier input end signal (fundamental signal RFcarrier) and power amplifier output end signal (feedback signal RFfeedback) respectively；
Distortion acquiring unit, obtains the distortion component of power amplifier 3.2 for anti-phase addition after the power amplifier input end signal collected and power amplifier output end signal are adjusted phase place；
Power amplifier 3.1, is configured to receive power amplifier input end signal and described distortion component, to offset described power amplification distortion.
Described distortion acquiring unit, is additionally operable to described power amplifier output end signal, the described power amplifier input end signal collected is carried out before being added signal amplitude adjustment, makes both power suitable.
Described distortion acquiring unit, is additionally operable to carry out described distortion component before importing power amplifier input signal amplitude adjustment and phase place adjustment, and the phase and amplitude adjusting described distortion component is minimum to power amplifier output distortion.
Described distortion acquiring unit, including for the signal conditioner of the described power amplifier input end signal collected and power amplifier output end signal amplitude adjustment and adjust the electric bridge 3.81 of described signal phase, phase shifter 3.71.The effect of phase shifter 3.71 and electric bridge 3.81 is in order to the power amplifier input end signal collected described in making adjusts phase place with described power amplifier output end signal, offsets fundametal compoment, the only remaining distortion component stayed.
Described distortion acquiring unit, also includes the signal conditioner for the adjustment of distortion component amplitude and the electric bridge 3.82 adjusted for distortion component signal phase place, phase shifter 3.72.
Described signal gathering unit, including first, second bonder 3.11,3.12 and first, second power splitter 3.21,3.22 for gathering power amplifier input and output end signal respectively.
Described signal gathering unit, also include the power detecting unit of power amplifier input end signal and output end signal, both described power monitoring unit are connected with respective signal gathering unit, and controlled by same controller 3.2 such as FPGA together with signal conditioner so that the power amplifier input and the output end signal power that collect are suitable.
Described power detecting unit include adjustable attenuator 3.31,3.32, detection tube 3.41,3.42 and ADC3.51,3.52.
Described fundamental signal RFcarrier signal conditioner includes numerical-control attenuator 3.61, and the signal conditioner of feedback signal RFfeedback includes signal amplifier 3.62, and the signal conditioner of described distortion component includes amplifier 3.9.
The application obtains diagram Vc and Vf by input power testing circuit and feedback power testing circuit, utilize FPGA or other control unit calculation process, control numerical-control attenuator 3.61 and each VGA3.62,3.9, make RFcarrier and RFfeedback power suitable, additionally little stepping can increase feedback signal power, till making linearisation effect preferably, therefore can realize any input/output power level, predistortion function under any rollback amount, it is achieved adaptation function.Attenuator shown in figure, VGA, power splitter and bonder etc. are provided to realize above-mentioned functions, therefore the present invention includes but not limited to the circuit structure shown in figure, and when practice, the position of electronic component can be changed relatively, to reach better linearisation effect.
Described electric bridge 3.81 is 180 ° of electric bridges, and described electric bridge 3.82 is 90 ° or 180 ° of electric bridges.
Technical scheme in above-mentioned the embodiment of the present application, at least has the following technical effect that or advantage:
1, the power amplification distortion component obtained in the present invention is the distortion component of power amplifier itself, but not obtains with the device simulation of similar power amplification distortion characteristic in prior art, and linearisation effect is more excellent.
2, the power amplifier input collected by power detection guarantee of the present invention is always to maintain consistent with the output end signal power collected, then can realize any input/output power level, the predistortion function under any rollback amount, it is achieved adaptation function.
3, the difference of the present invention and feed forward approach: prior art feed forward approach is after first loop obtains the distortion component of power amplifier, and after distortion component is processed, the anti-phase outfan being added to power amplifier is to offset distortion component.The application is after obtaining the distortion component of power amplifier, its anti-phase input that imports to offset distortion component, after application self-adapting technology, convergence can be realized calculate: after first time adjusts, the numerical-control attenuator attenuation of Rfcarrier branch road to remain stationary as, gathering Vf and this fixing Vc to compare, namely both differences are more and more less realizes convergence later every time.Therefore, as long as attenuator and amplifier stepping are sufficiently small, detecting circuit precision is sufficiently high, gain flatness between feedback signal and power amplifier output is sufficiently small, Circuit responce speed is sufficiently high, other devices are enough desirable, and the power amplifier output distortion component being operated in any power level can be made in theory to trend towards infinitesimal.That is in theory, linearisation effect of the present invention can be better than feed forward approach.
4, the difference of the present invention and the technology such as digital pre-distortion and intermediate frequency predistortion is: need not arrive the feedback network of numeric field or frequency domain；Need not numerous and diverse numerical calculation and signal processing；Do not need the analog predistortion chips such as SC1894, it does not have applying frequency limits.
5, to need to use the device consuming power few for present system, with other domination technology additional power consumptions quite or less.
Although preferred embodiments of the present invention have been described, but those skilled in the art are once know basic creative concept, then these embodiments can be made other change and amendment.So, claims are intended to be construed to include preferred embodiment and fall into all changes and the amendment of the scope of the invention.Obviously,
The present invention can be carried out various change and modification without deviating from the spirit and scope of the present invention by those skilled in the art.So, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. an adaptive feedforward pre-distortion method, it is characterised in that: comprise the steps:
Gather power amplifier input end signal and power amplifier output end signal；
The described power amplifier input end signal collected is adjusted with power amplifier output end signal and is added, after phase place, the distortion component obtaining power amplifier；
Described distortion component is imported described power amplifier input, for offsetting the distortion of power amplifier.
2. adaptive feedforward pre-distortion method according to claim 1, it is characterized in that: described in the power amplifier input end signal that collects before being added, carry out signal amplitude adjustment with described power amplifier output end signal, make both power suitable, described in the adjusting offset of the power amplifier input end signal that collects and described power amplifier output end signal be 180 °.
3. adaptive feedforward pre-distortion method according to claim 2, it is characterised in that: described signal amplitude adjustment includes signal and amplifies or decay.
4. adaptive feedforward pre-distortion method according to claim 1, it is characterised in that: the amplitude adjustment of described power amplifier input end signal and the collection of power amplifier output end signal, amplitude adjustment and described distortion component signal is controlled by same control unit.
5. an adaptive feedforward pre-distortion system, it is characterised in that: include as follows:
Signal gathering unit, for gathering power amplifier input end signal and power amplifier output end signal respectively；
Distortion acquiring unit, for being added, after the power amplifier input end signal collected and power amplifier output end signal are adjusted phase place, the distortion component obtaining power amplifier；
Power amplifier, is configured to receive power amplifier input end signal and described distortion component, to offset described power amplification distortion.
6. adaptive feedforward pre-distortion system according to claim 5, it is characterized in that: described distortion acquiring unit, it is additionally operable to described power amplifier output end signal, the described power amplifier input end signal collected is carried out before being added signal amplitude adjustment, makes both power suitable；The described power amplifier input end signal collected and described power amplifier output end signal anti-phase addition.
7. adaptive feedforward pre-distortion system according to claim 5, it is characterized in that: described distortion acquiring unit, including the signal conditioner of the described power amplifier input end signal for collecting and power amplifier output end signal amplitude adjustment and adjust the electric bridge of described signal phase, phase shifter, and the signal conditioner adjusted for distortion component amplitude and the electric bridge adjusted for distortion component signal phase place, phase shifter；Described signal conditioner includes signal amplifier or numerical-control attenuator.
8. adaptive feedforward pre-distortion system according to claim 5, it is characterised in that: described signal gathering unit, including first, second bonder and first, second power splitter for gathering power amplifier input and output end signal respectively.
9. adaptive feedforward pre-distortion system according to claim 7, it is characterized in that: described signal gathering unit, also include the power detecting unit of power amplifier input end signal and output end signal, both described power monitoring unit are connected with respective signal gathering unit, and are jointly controlled by same control unit with signal conditioner.
10. adaptive feedforward pre-distortion system according to claim 9, it is characterised in that: described power detecting unit includes adjustable attenuator, detection tube and analog-digital converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610039942.XA CN105720931A (en) | 2016-01-21 | 2016-01-21 | Adaptive feedforward pre-distortion system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610039942.XA CN105720931A (en) | 2016-01-21 | 2016-01-21 | Adaptive feedforward pre-distortion system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105720931A true CN105720931A (en) | 2016-06-29 |
Family
ID=56153642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610039942.XA Pending CN105720931A (en) | 2016-01-21 | 2016-01-21 | Adaptive feedforward pre-distortion system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105720931A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108390651A (en) * | 2018-02-09 | 2018-08-10 | 厚元技术控股有限公司 | A kind of radio-frequency power amplifier and counteracting method of adaptive feedback canceller distorted signal |
| CN113162559A (en) * | 2021-03-30 | 2021-07-23 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Millimeter wave self-adaptive predistortion linearized solid-state power amplifier |
| CN113630134A (en) * | 2021-08-11 | 2021-11-09 | 电子科技大学 | Digital feedforward-assisted broadband digital predistortion method and device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103475315A (en) * | 2013-09-12 | 2013-12-25 | 电子科技大学 | Method and device for improving linearity of radio frequency power amplifier |
-
2016
- 2016-01-21 CN CN201610039942.XA patent/CN105720931A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103475315A (en) * | 2013-09-12 | 2013-12-25 | 电子科技大学 | Method and device for improving linearity of radio frequency power amplifier |
Non-Patent Citations (1)
| Title |
|---|
| 陈浩: "《基于前馈系统和预失真的射频功率放大器设计》", 《中国优秀硕士学位论文全文数据库》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108390651A (en) * | 2018-02-09 | 2018-08-10 | 厚元技术控股有限公司 | A kind of radio-frequency power amplifier and counteracting method of adaptive feedback canceller distorted signal |
| CN113162559A (en) * | 2021-03-30 | 2021-07-23 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Millimeter wave self-adaptive predistortion linearized solid-state power amplifier |
| CN113630134A (en) * | 2021-08-11 | 2021-11-09 | 电子科技大学 | Digital feedforward-assisted broadband digital predistortion method and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6943628B2 (en) | Methods and apparatus for substantially reducing nonlinear distortion | |
| CN105991096A (en) | Adjusting power amplifier stimuli based on output signals | |
| WO2016151518A1 (en) | Method and apparatus for multiband predistortion using time-shared adaptation loop | |
| CN103401515B (en) | A kind of feed forward power amplifier for adaptive frequency compensation | |
| US20120194270A1 (en) | Broadband Linearization Module And Method | |
| CN101114811A (en) | Analog predistortion based linear power amplification circuit and method | |
| CN107359864B (en) | Self-adaptive agile digital predistortion method for frequency agile power amplifier | |
| CN101388649B (en) | Low non-linear power amplifier | |
| CN108347226B (en) | Envelope tracking method, system and device | |
| CN108134583A (en) | A kind of error negative feedback arized power amplifying device and method | |
| US7053709B1 (en) | Linearization of an amplifier | |
| CN105720931A (en) | Adaptive feedforward pre-distortion system and method | |
| CN101247154B (en) | System and method for implementing mutual compensation between despicking and digital predistortion | |
| CN102710220B (en) | Feed-forward power amplifier on basis of pre-distortion and Doherty | |
| CN209419582U (en) | A kind of superlinearity shortwave amplifier | |
| US9036732B2 (en) | Modeling transmitter and/or transmit observation receiver frequency response and utilization thereof | |
| CN100512246C (en) | Radio frequency distortion linearizing method | |
| WO2019015679A1 (en) | Radio frequency signal linearisation processing circuit and method | |
| CN205545163U (en) | Predistortion power amplifier system | |
| CN206922797U (en) | A kind of short range digital pre-distortion device | |
| KR101131910B1 (en) | Output power unit for a mobile telecommunication equipments | |
| KR101106955B1 (en) | Output Unitt FOR A MOBILE TELECOMMUNICATION EQUIPMENTS | |
| Qing et al. | A Combined Approach of DPD and CFR in F-OFDM System | |
| CN113131873B (en) | Self-adaptive feedforward linearization power amplifier device | |
| CN103840776B (en) | A kind of device improving the feed-forward amplifier linearity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160629 |
|
| RJ01 | Rejection of invention patent application after publication |