CN104901638A - Multichannel digital pre-distortion (DPD) power amplifying system - Google Patents
Multichannel digital pre-distortion (DPD) power amplifying system Download PDFInfo
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Abstract
The invention discloses a multichannel digital pre-distortion (DPD) power amplifying system, including a digital signal processing module, a DPD processing module, a radio frequency power amplifying module, a radio frequency switch and a feedback link connected in series, wherein the coupling output terminal of each radio frequency amplifier of the radio frequency power amplifying module is connected with the corresponding input end of the radio frequency switch while the output end of the radio frequency switch is connected with the digital signal processing module by the feedback link, the digital signal processing module is also connected with each DPD core of the DPD processing module and the radio frequency switch by control signal lines respectively, the digital signal processing module outputs control signals to each DPD core of the DPD processing module and the radio frequency switch by the control signal lines, the radio frequency switch selects a coupling signal switching on the corresponding communication link to the feedback link according to the control signal of the digital signal processing module, and each DPD core triggers DPD operation treatment according to the control signal of the digital signal processing module. According to the multichannel DPD power amplifying system, the channel switching time is greatly reduced.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of multichannel digital predistortion DPD power amplification system.
Background technology
Along with the evolution of forth generation mobile communication technology (4G), 4G network adopts distributed base station mostly, the equipment in existing distributed base station all requires that power amplification efficiency is high, keep good linear, cost is low, and realizes the technology such as multichannel.For reaching the good linearity, usually adopt digital pre-distortion (Digital Pre-Distortion, the DPD) technology such as technology and Doherty.Adopt during DPD technology and usually require to provide feedback path to carry out image data, DPD core is sent to carry out pre-distortion algorithms process the data of collection, so that carry out the Automatic adjusument of linearized system, make to keep good linear effects under different rings mirror, in multiplexer channel, adopt the mode sharing a feedback sample passage to realize multiplexer channel DPD reponse system simultaneously, thus reduce the volume of system and cost-saving.For the multichannel DPD technology of shared feedback path, generally by judging that DPD kernel state information carries out signal transacting at present, complete the quick switching of multichannel DPD according to the feature of DPD hits and design factor simultaneously, thus improve speed and the communication quality that predistortion DPD upgrades coefficient.This multichannel changing method has processing speed faster, but it relates to the flow process such as status poll and judgement of DPD core, still needs to spend the not short time.
Summary of the invention
Based on this, an object of the embodiment of the present invention is to provide a kind of multichannel digital predistortion DPD power amplification system, and it can improve switch speed when multichannel DPD passage carries out passage bridge.
For achieving the above object, the embodiment of the present invention by the following technical solutions:
A kind of multichannel digital predistortion DPD power amplification system, comprise the digital signal processing module connected successively, digital pre-distortion DPD processing module, radio frequency power amplification module, and radio frequency converting switch, feedback link, the coupled output of each radio frequency amplifier of described radio frequency power amplification module connects with the corresponding input of described radio frequency converting switch, the output of described radio frequency converting switch is connected with described digital signal processing module by described feedback link, described digital signal processing module is also respectively by each DPD core of control signal wire and described digital pre-distortion DPD processing module, described radio frequency converting switch connects, described digital signal processing module is by each DPD core of digital pre-distortion DPD processing module described in control signal alignment, described radio frequency converting switch exports control signal, described radio frequency converting switch selects the coupled signal of conducting respective communication link to send into described feedback link according to the control signal of described digital signal processing module, each described DPD core triggers DPD calculation process according to the control signal of described digital signal processing module.
According to the system of the embodiment of the present invention as above, it is the same feedback link of multichannel DPD channels share, and be carry out hardware controls by digital signal processing module by the passage bridge of control signal wire radio frequency diverter switch and the operation of each DPD core, hardware controls mode can reach switch speed faster, thus greatly reduce the time of passage bridge, and simplify system control process.
Accompanying drawing explanation
Fig. 1 is the structural representation of the multichannel digital predistortion DPD power amplification system of the embodiment of the present invention;
Fig. 2 is the schematic diagram of the multichannel digital predistortion DPD power amplification system of a concrete example;
Fig. 3 is the theory diagram of system in a concrete example;
Fig. 4 is the design principle schematic diagram of the same feedback path of multichannel DPD channels share in a concrete example;
Fig. 5 is the time diagram that in a concrete example, control channel switches.
Embodiment
For making object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is described in further detail.Should be appreciated that embodiment described herein only in order to explain the present invention, do not limit protection scope of the present invention.
The structural representation of the multichannel digital predistortion DPD power amplification system of the embodiment of the present invention has been shown in Fig. 1.As shown in Figure 1, multichannel digital predistortion DPD power amplification system in the present embodiment comprises the digital signal processing module connected successively, digital pre-distortion DPD processing module, radio frequency power amplification module, also comprise radio frequency converting switch, feedback link, the coupled output of each radio frequency amplifier of radio frequency power amplification module connects with the corresponding input of radio frequency converting switch, the output of radio frequency converting switch is connected with digital signal processing module by feedback link, wherein, digital signal processing module is also respectively by each DPD core of control signal wire and digital pre-distortion DPD processing module, radio frequency converting switch connects, digital signal processing module is by each DPD core of control signal alignment digital pre-distortion DPD processing module, radio frequency converting switch exports control signal, radio frequency converting switch selects the coupled signal of conducting respective communication link to send into feedback link according to the control signal of digital signal processing module, each DPD core triggers DPD calculation process according to the control signal of digital signal processing module.
Wherein, when digital signal processing module is connected with each DPD core by control signal wire, can be connected with the first pin of each DPD core, the second pin respectively by control line, and send to each DPD core the control signal whether coupled signal (namely feeding back radio-frequency channel) of checking the communication link of answering with this DPD connect by the first pin, to be sent to each DPD core by the second pin and trigger the triggering signal that this DPD core carries out DPD computing.
Wherein, the system of the embodiment of the present invention as above, analog-digital converter ADC module, digital analog converter DAC module and radio frequency link can also be included, wherein, the output of analog-digital converter ADC module is connected with the input of digital signal processing module, digital analog converter DAC module is connected between digital pre-distortion DPD processing module and radio frequency power amplification module, and radio frequency link is connected between digital analog converter DAC module and radio frequency power amplification module.This radio frequency link can comprise the IQ modulation module, ATT attenuation module, filter and the PA power amplifier that connect successively, and the input of IQ modulation module is connected with the output of digital analog converter DAC module, the output of PA power amplifier is connected with the input of radio frequency power amplification module.
Digital signal processing module as above comprises the Digital Down Convert DDC module connected successively, digital ALC control module, peak clipping CFR module, Digital Up Convert DUC module, respectively combine digital down-conversion, digital ALC control, peak clipping and Digital Up Convert function.
Be described in detail below in conjunction with the scheme of one of them concrete example to the embodiment of the present invention.
The schematic diagram of the multichannel digital predistortion DPD power amplification system based on the present invention's concrete example has been shown in Fig. 2.As shown in Figure 2, whole system mainly comprises digital module, the large module of radio frequency power amplification module two, digital module is directly connected with radio frequency power amplification module, and digital module and radio frequency power amplification module are also connected by the feedback link shared, and realize signal feedback.
Wherein, digital module mainly completes Monitoring and Controlling, data acquisition, DPD, CFR (peak clipping, Crest Factor Reduction), ALC (Automatic level control, auto level control) etc. function, and radio frequency power amplification module is mainly in order to carry out the amplification of radio-frequency power, this radio frequency power amplification module can be Doherty power amplifier module, export to reach high efficiency, and the feedback link shared is used for each DPD core in digital module, is convenient to each DPD core and carries out DPD process.
Based on the system shown in Fig. 2, the theory diagram of this system in a concrete example is shown in Fig. 3.As shown in Figure 3, this system includes digital signal processing module 301, digital pre-distortion DPD processing module 302, radio frequency power amplification module 303, radio frequency converting switch 304, feedback link 305, wherein, digital signal processing module 301, DPD processing module 302, radio frequency power amplification module 303 connect successively, each input of radio frequency converting switch 304 is connected with each coupled output of radio frequency power amplification module 303, and the output of radio frequency converting switch 304 is connected with digital signal processing module 301 by feedback link 305.
As shown in Figure 3, in the system of this example, DAC (Digital to analog converter can also be included, digital analog converter) module 306, radio frequency link 307 and ADC (Analog to digital converter, analog-digital converter) module 300, wherein the output of analog-digital converter ADC module 300 is connected with the input of digital signal processing module 301, digital analog converter DAC module 306 is connected between digital pre-distortion DPD processing module 302 and radio frequency power amplification module 303, radio frequency link 307 is connected between digital analog converter DAC module 306 and radio frequency power amplification module 303.This radio frequency link 307 can comprise the IQ modulation module, ATT attenuation module, filter and the PA power amplifier that connect successively, and the input of IQ modulation module is connected with the output of digital analog converter DAC module 306, the output of PA power amplifier is connected with the input of radio frequency power amplification module 303.
As shown in Figure 3, in this example, MCU (Microcontroller Unit can also be included, micro-control unit) processor, micro-control unit MCU processor can in order to be configured each chip, such as analog-digital converter ADC module, digital analog converter DAC module, digital signal processing module, chip in digital pre-distortion DPD processing module, clock chip etc., control figure attenuator can also be used for, the temperature of monitoring power amplification system, complete the temperature-compensating of digital link and power amplifier module, the working condition of monitoring power amplification system, the abnormal conditions etc. occurred in process power amplification system, the concrete control treatment mode of micro-control unit MCU processor, can adopt any mode that is existing and that later may occur at present to carry out.
During specific works, radiofrequency signal is through down-conversion, attenuator, filter, after the process of I/Q modulator, enter analog-digital converter ADC module 300 to sample, analog-digital converter ADC module 300 gathers radio frequency analog signal, and convert radio frequency analog signal to digital signal, for preparing in the Digital Signal Processing of digital signal processing module 301, digital signal processing module 301 pairs of digital signals carry out DDC (Digital Down Converter, Digital Down Convert), numeral ALC controls, CFR (peak clipping), DUC (Digital Up Converter, Digital Up Convert) etc. process after, digital signal after process is sent into digital pre-distortion DPD processing module 302, the data that each DPD core of digital pre-distortion DPD processing module 302 feeds back according to feedback link 305 carry out digital pre-distortion, the output linearity of power amplification system is made to reach kilter, digital analog converter DAC module 306 converts the digital signal after digital pre-distortion DPD processing module 302 digital pre-distortion to radio frequency analog signal, radio frequency link 307 completes the transmission of this radio frequency analog signal and inhibit signal reaches predetermined power, and launch after carrying out power amplification by radio frequency power amplification module 303.Simultaneously, enter into radio frequency converting switch 304 from the radio frequency amplifier PA coupling unit signal of radio frequency power amplification module 303 to be selected by digital signal processing module 301, feedback link 305 pairs of coupled signals carry out ATT, IQ modulation, feedback A after the process such as D analog-to-digital conversion, be sent to digital signal processing module 301 to process, after digital signal processing module 301 pairs of feedback signals process, the DPD core that the feedback signal after process is sent to the correspondence of DPD processing module 302 is carried out DPD process by the selection result according to radio frequency converting switch 304.
In the scheme of the embodiment of the present invention, the same feedback link of multichannel DPD channels share, the pin that the design of feedback link needs each DPD core of DPD processing module to provide, to the operation of control DPD core, namely controls the operation of each DPD core by the mode of hardware.Meanwhile, also need to control radio frequency converting switch and be connected to corresponding feedback radio-frequency channel.
The design principle schematic diagram of the multichannel DPD channels share same feedback link in a concrete example has been shown in Fig. 4, as shown in Figure 4, in the scheme of the embodiment of the present invention, the operation of passage bridge and DPD core is controlled by digital signal processing module 301, by this hardware controls mode, switch speed faster can be reached, shortening the time in the past needing the state by inquiring about DPD to carry out path switching, simplifying control flow.Wherein, digital signal processing module 301 is connected with radio frequency converting switch 304 by control signal wire, and be connected with two pins of each DPD core respectively by control signal wire, digital signal processing module 301 sends by control signal alignment radio frequency converting switch 304 control signal being switched to current feedback radio-frequency channel, and after the feedback signal of feedback link 305 is sent to the DPD core corresponding with current feedback radio-frequency channel, digital signal processing module 301 sends by the first pin of the control signal alignment DPD core corresponding with current feedback radio-frequency channel the control signal connected corresponding feedback radio-frequency channel, the second pin to the DPD core corresponding with current feedback radio-frequency channel sends the triggering signal of carrying out DPD computing.Wherein, the time that digital signal processing module 301 sends triggering signal is greater than the minimum time that this DPD core effectively runs, be greater than the minimum time that this DPD core effectively runs in other words the running time of this DPD core, this time is determined by the arithmetic speed of DPD core usually, to guarantee signal stabilization, effectively DPD calculation process can be carried out.
It is example that Fig. 5 shows the time diagram that in a concrete example, control channel switches, and below in conjunction with Fig. 4, Fig. 5, is illustrated one of them handoff procedure.
In shown in Fig. 5, GP1, Adapt Enable is the pin that DPD core provides, TX1, TX2 represent two different communication links, the function of GP1 pin is: when the level of this pin is low, its representative is now fed back radio-frequency channel and is connected and stablize, and Adapt Enable pin carries out predistortion operation for triggering DPD core; Feedback RF Switch is the switch of radio frequency converting switch, and digital signal processing module controls radio frequency converting switch makes the feedback signal of corresponding output be switched on shared feedback link, thus carries out DPD calculation process.
Shown in composition graphs 4,5, one specifically switches example can be as described below.
Digital signal processing module is when carrying out pin initialization, link is chosen for link 1 (TX1), switch Feedback RF Switch by link 1 is set to high level, the GP1 pin of the DPD1 core of link 1 is set to low level, notice DPD1 core feedback radio-frequency channel is ready to, again the Adapt Enable pin of DPD1 core is set to high level, DPD1 is made to endorse to run and offset algorithm, the Adapt Enable pin of the DPD2 core of link 2 (TX2) is set to low level simultaneously, DPD2 core operation suspension is made to offset algorithm, keep original parameter, the GP1 pin of DPD2 core is set to high level, notice DPD2 core feedback radio-frequency channel is unripe, again the switch Feedback RF Switch of link 2 is set to low level.
Then, digital signal processing module starts timing, when the time arrive feedback turn-on time (this time must be greater than DPD core complete time spent by the operation once offseting algorithm by) time, the Adapt Enable pin of DPD1 core is set to low level, DPD1 core operation suspension is made to offset algorithm, then the GP1 pin of DPD1 core is set to high level, inform that the current feedback link data of DPD1 core are unavailable, now, the switch Feedback RF Switch of link 1 is set to low level, the switch Feedback RF Switch of link 2 is set to high level, feedback link is made to be that link 2 is used, maintain a period of time afterwards, link 2 is stablized, again the GP1 pin of the DPD2 core of link 2 is set to low level, the Adapt Enable pin of DPD2 core is set to high level, DPD2 is made to endorse to run and offset algorithm.
Equally, digital signal processing module starts timing, when time arrival feedback turn-on time, arranges next group control line with the switching of control link.Namely ensure that each time only has a passage normally to run, other links then keep original parameter.
Can learn as mentioned above, in the scheme of the embodiment of the present invention, when being switched to next passage from current feedback radio-frequency channel, before radio frequency converting switch switches, current DPD core first need be stopped to run (such as GP1 pin be set to 1, Adapt Enable pin be set to 0), at least need 1 feedback clock period in advance to stop DPD core to run; During from a upper passage bridge to current feedback radio-frequency channel, before operation DPD core, need first radio frequency converting switch to be switched to current feedback radio-frequency channel, and after waiting for that effective data have entered the chip of DPD core, DPD core is just allowed to run (such as: GP1 pin is set to 1, Adapt Enable pin is set to 0), to guarantee signal stabilization; The DPD core of each passage needs the minimum time (this is determined by the arithmetic speed of DPD core) effectively run than DPD core to grow running time; DPD core run time, need guarantee Mu (time delay error) value of two DPD loops substantially identical (namely the two difference one acceptable among a small circle within), guarantee the consistency offseting effect and system of DPD.Therefore, before radio frequency converting switch, the RF-coupled signal of two-way needs strictly isometric, namely isometric from the coupled signal of each radio frequency amplifier coupling of radio frequency power amplification module 303, two paths of data clock and change over clock need synchronously process simultaneously, guarantee that phase place is consistent.The concrete method of synchronization can adopt any mode that is existing and that later may occur at present to carry out.
Based on the multichannel digital predistortion DPD power amplification system of the embodiment of the present invention as above, a concrete startup application controls flow process can be as described below: after MCU starts, run BOOTSTRAP, then load UBOOT and complete guiding linux system and the operation completing linux system, finally, each monitoring process of power amplification system is run.First start communication process, its function can be the CSP3 agreement, ATS agreement, the character string agreement that realize based on the hardware interface such as network interface, RS-485, RS-232, USB; Then power amplification system calibration flow process is completed according to Host Command: self-inspection before power amplifier DPD trains, capability correction, adaptive equalization, OP DPD train; Then the temperature compensation realizing each passage controls: power tube grid voltage exports the IQ temperature compensation etc. of temperature compensation calculating, digital link temperature compensation, FPGA; Finally start power amplification system monitoring thread: mainly carry out ADC sampling, calculate each performance number, judge alarm, record alarm and carry out alarming processing.These threads of system constantly cyclically carry out.The concrete startup control mode of each thread repeats no longer in detail at this.
In the system of the embodiment of the present invention as above, above-mentioned digital signal processing module 301 can pass through FPGA (Field-Programmable Gate Array, i.e. field programmable gate array) realize, to obtain conversion speed faster, above-mentioned radio frequency power amplification module can adopt Doherty technology to realize, to make power amplifier reach higher efficiency and good linear properties, and with low cost.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a multichannel digital predistortion DPD power amplification system, it is characterized in that, comprise the digital signal processing module connected successively, digital pre-distortion DPD processing module, radio frequency power amplification module, and radio frequency converting switch, feedback link, the coupled output of each radio frequency amplifier of described radio frequency power amplification module connects with the corresponding input of described radio frequency converting switch, the output of described radio frequency converting switch is connected with described digital signal processing module by described feedback link, described digital signal processing module is also respectively by each DPD core of control signal wire and described digital pre-distortion DPD processing module, described radio frequency converting switch connects, described digital signal processing module is by each DPD core of digital pre-distortion DPD processing module described in control signal alignment, described radio frequency converting switch exports control signal, described radio frequency converting switch selects the coupled signal of conducting respective communication link to send into described feedback link according to the control signal of described digital signal processing module, each described DPD core triggers DPD calculation process according to the control signal of described digital signal processing module.
2. multichannel digital predistortion DPD power amplification system according to claim 1, it is characterized in that, described digital signal processing module is connected with the first pin of each DPD core, the second pin respectively by control signal wire, sent the control signal checked the feedback radio-frequency channel of answering with this DPD and whether connect by described first pin to each DPD core, to be sent to each DPD core by described second pin and trigger the triggering signal that this DPD core carries out DPD computing.
3. multichannel digital predistortion DPD power amplification system according to claim 2, it is characterized in that, described digital signal processing module sends by control signal alignment radio frequency converting switch the control signal being switched to current feedback radio-frequency channel, and after the feedback signal of described feedback link is sent to the DPD core corresponding with described current feedback radio-frequency channel, the first pin to the DPD core corresponding with described current feedback radio-frequency channel sends the control signal that corresponding feedback radio-frequency channel is connected, the second pin to the DPD core corresponding with described current feedback radio-frequency channel sends the triggering signal of carrying out DPD computing.
4. multichannel digital predistortion DPD power amplification system according to claim 3, is characterized in that, the time that described digital signal processing module sends described triggering signal is greater than the minimum time that this DPD core effectively runs.
5. multichannel digital predistortion DPD power amplification system according to claim 3, is characterized in that, isometric from the coupled signal of each radio frequency amplifier coupling of described radio frequency power amplification module.
6. the multichannel digital predistortion DPD power amplification system according to claim 1 to 5 any one, it is characterized in that, also comprise analog-digital converter ADC module, digital analog converter DAC module and radio frequency link, the output of described analog-digital converter ADC module is connected with the input of described digital signal processing module, described digital analog converter DAC module is connected between described digital pre-distortion DPD processing module and described radio frequency power amplification module, described radio frequency link is connected between described digital analog converter DAC module and described radio frequency power amplification module.
7. multichannel digital predistortion DPD power amplification system according to claim 6, it is characterized in that, described radio frequency link comprises the IQ modulation module, ATT attenuation module, filter and the PA power amplifier that connect successively, the input of described IQ modulation module is connected with the output of described digital analog converter DAC module, and the output of described PA power amplifier is connected with the input of described radio frequency power amplification module.
8. the multichannel digital predistortion DPD power amplification system according to claim 1 to 5 any one, it is characterized in that, described digital signal processing module comprises the Digital Down Convert DDC module connected successively, digital ALC control module, peak clipping CFR module, Digital Up Convert DUC module.
9. multichannel digital predistortion DPD power amplification system according to claim 6, it is characterized in that, also comprise micro-control unit MCU processor, for being configured described analog-digital converter ADC module, described digital signal processing module, described digital analog converter DAC module, described digital pre-distortion DPD processing module.
10. the multichannel digital predistortion DPD power amplification system according to claim 1 to 5 any one, is characterized in that, described digital signal processing module adopts fpga chip to realize, and described radio frequency power amplification module is Doherty power amplifier module.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108449096A (en) * | 2018-03-26 | 2018-08-24 | 华南理工大学 | A kind of pre-distortion method and system based on parallel-connection structure |
| WO2019157704A1 (en) * | 2018-02-14 | 2019-08-22 | Oppo广东移动通信有限公司 | Output power adjustment method and related product |
| WO2021243833A1 (en) * | 2020-06-03 | 2021-12-09 | 上海创远仪器技术股份有限公司 | Circuit structure and method for implementing real time predistortion calibration for broadband iq modulation |
| US11239870B2 (en) | 2018-11-16 | 2022-02-01 | Huawei Technologies Co., Ltd. | Transmitter device and signal processing method |
| CN114553245A (en) * | 2020-11-26 | 2022-05-27 | 上海华为技术有限公司 | Radio frequency chip and signal feedback method through radio frequency chip |
| CN115104261A (en) * | 2020-02-25 | 2022-09-23 | 株式会社Kmw | Multi-band transmitter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101594327A (en) * | 2008-05-26 | 2009-12-02 | 芯通科技（成都）有限公司 | Multichannel digital predistortion processing unit and pre-distortion method |
| CN202043077U (en) * | 2011-03-14 | 2011-11-16 | 京信通信技术(广州)有限公司 | DPD Feedback path shared by multi-standard system |
| CN102957648A (en) * | 2011-08-19 | 2013-03-06 | 京信通信系统（中国）有限公司 | Method and device for multi-channel DPD (digital pre-distortion) collaborative switching |
| WO2013056257A1 (en) * | 2011-10-14 | 2013-04-18 | Qualcomm Incorporated | Adaptive transmitter pre-distortion reusing existing receiver for feedback |
-
2015
- 2015-06-03 CN CN201510299539.6A patent/CN104901638B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101594327A (en) * | 2008-05-26 | 2009-12-02 | 芯通科技（成都）有限公司 | Multichannel digital predistortion processing unit and pre-distortion method |
| CN202043077U (en) * | 2011-03-14 | 2011-11-16 | 京信通信技术(广州)有限公司 | DPD Feedback path shared by multi-standard system |
| CN102957648A (en) * | 2011-08-19 | 2013-03-06 | 京信通信系统（中国）有限公司 | Method and device for multi-channel DPD (digital pre-distortion) collaborative switching |
| WO2013056257A1 (en) * | 2011-10-14 | 2013-04-18 | Qualcomm Incorporated | Adaptive transmitter pre-distortion reusing existing receiver for feedback |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019157704A1 (en) * | 2018-02-14 | 2019-08-22 | Oppo广东移动通信有限公司 | Output power adjustment method and related product |
| CN111373656A (en) * | 2018-02-14 | 2020-07-03 | Oppo广东移动通信有限公司 | Output power adjusting method and related product |
| CN108449096A (en) * | 2018-03-26 | 2018-08-24 | 华南理工大学 | A kind of pre-distortion method and system based on parallel-connection structure |
| US11239870B2 (en) | 2018-11-16 | 2022-02-01 | Huawei Technologies Co., Ltd. | Transmitter device and signal processing method |
| CN115104261A (en) * | 2020-02-25 | 2022-09-23 | 株式会社Kmw | Multi-band transmitter |
| WO2021243833A1 (en) * | 2020-06-03 | 2021-12-09 | 上海创远仪器技术股份有限公司 | Circuit structure and method for implementing real time predistortion calibration for broadband iq modulation |
| US12119965B2 (en) | 2020-06-03 | 2024-10-15 | Transcom (Shanghai Technology Co., Ltd. | Circuit structure for realizing real-time predistortion calibration of broadband IQ modulation and method thereof |
| CN114553245A (en) * | 2020-11-26 | 2022-05-27 | 上海华为技术有限公司 | Radio frequency chip and signal feedback method through radio frequency chip |
| WO2022111628A1 (en) * | 2020-11-26 | 2022-06-02 | 华为技术有限公司 | Radio frequency chip and signal feedback method performed by means of radio frequency chip |
| CN114553245B (en) * | 2020-11-26 | 2023-07-18 | 上海华为技术有限公司 | Radio frequency chip and signal feedback method through radio frequency chip |
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