CN208675192U - A kind of wideband predistortion power amplifier apparatus - Google Patents
A kind of wideband predistortion power amplifier apparatus Download PDFInfo
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- CN208675192U CN208675192U CN201821325112.4U CN201821325112U CN208675192U CN 208675192 U CN208675192 U CN 208675192U CN 201821325112 U CN201821325112 U CN 201821325112U CN 208675192 U CN208675192 U CN 208675192U
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Abstract
The utility model relates to a kind of wideband predistortion power amplifier apparatus, including input coupler to connect power amplifier by delay line, issue main signal；Input coupler connects distortion correction module again, after sending main signal to distortion correction module, error output signal is issued to be combined with main signal, it is sent to the input terminal of power amplifier, carry out power amplification, the output end of power amplifier connects back coupler, the output end connection output antenna of back coupler, it is connected to broadband low-converter simultaneously, output signals to broadband low-converter, broadband signal is reduced to 140MHz intermediate-freuqncy signal by broadband low-converter, is output to distortion correction module and is carried out error correction.The utility model improves power amplifier properties and efficiency, and insertable application simplifies system complexity.Feedback end use low-converter, bandpass filter with guarantee broadband correct consistency.
Description
Technical field
The utility model relates to wireless communication RF and microwave regime, specifically a kind of wideband predistortion power amplification
Device device.
Background technique
When less radio-frequency power amplifier input signal amplitude is reached to a certain degree, the output of power amplifier will be saturated and occur
Nonlinear effect.Power amplifier is the most important nonlinear device of modern wireless communication systems, non-linear to cause to be distorted, and is caused
The decline of communication quality, the bit error rate increase, and interfere adjacent channel, so having to consider function when designing wireless communication system
Distortion caused by rate amplifier is non-linear, using certain method, such as back-off, linearization technique etc. is non-linear to reduce
Caused distortion.
Modem causes IQ imbalance and distortion to deteriorate seriously in broadband rf signal, because radio frequency band is wide,
Link-quality is influenced obvious.
Utility model content
In view of the deficiencies of the prior art, the utility model provides a kind of band pre-distorting power amplifier device, solves because penetrating
Degradation problem caused by frequent section is wide.
The utility model technical solution used for the above purpose is:
A kind of wideband predistortion power amplifier apparatus, including input coupler connect power amplifier by delay line,
Issue main signal；Input coupler connects distortion correction module again, and after sending main signal to distortion correction module, it is defeated to issue error
Signal is combined with main signal out, is sent to the input terminal of power amplifier, carries out power amplification, the output of power amplifier
End connection back coupler, the output end connection output antenna of back coupler, while it being connected to broadband low-converter, output letter
Number broadband low-converter is arrived, broadband signal is reduced to 140MHz intermediate-freuqncy signal, is output to distortion correction mould by broadband low-converter
Block carries out error correction.
The distortion correction module includes error calculation and correction module and modulator, wherein error calculation and correction module
It receives frequency variation signal and carries out error calculation and amendment, error amount is output to modulator, modulator connects input coupler, receives
Main signal, output error output signal.
If bandpas filter is set between broadband low-converter and distortion correction module, filters out 5 times of signal bandwidth volumes
Outer spurious signal.
The utility model has the advantages that and advantage:
1. reducing the non-linear distortion of power amplifier, power amplification efficiency is improved.
2. eliminating the error component that feedback network IQ imbalance introduces under the scene of broadband.
3. wideband point calibration look-up table mode compared with prior art reduces the requirement to processing.
4. system calibration fast convergence rate is not necessarily to manual intervention.
5. being suitable for Various Complex application scenarios.
Detailed description of the invention
Fig. 1 is the structure drawing of device of the utility model；
Fig. 2 is the Volterra series model schematic diagram of the simplification of the utility model.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and embodiments.
It is as shown in Figure 1 the structure drawing of device of the utility model.
Including power amplifier input coupler, delay line, power amplifier, output coupler, broadband low-converter, intermediate frequency band logical
Filter, distortion correction module.Power amplifier input terminal couples original signal to distortion correction module original signal input terminal, main signal
It is combined by delay line and distortion correction module output signal, is input to the input terminal of power amplifier, power amplifier output
Coupled signal is inputted to down coversion, and broadband signal is reduced to fixed 140MHz intermediate-freuqncy signal and exported by frequency converter, passes through midband
Bandpass filter filters out spuious outside 5 times of signal bandwidths, is input to distortion correction module, completes calibration.
Power amplifier input terminal couples original signal to distortion correction module, and main signal is closed by delay line and error output signal
Road is input to the input terminal of power amplifier, and power amplifier output coupling signal to down coversion inputs, the output of frequency converter intermediate frequency
140MHz, while 5 times of additional spurious signals of signal bandwidth are filtered out by intermediate-frequency filter, numerical portion carries out intermediate-freuqncy signal
IQ calibration and temperature compensation compensation calibration.
The error calculation and modification method that error calculation described in the utility model and correction module are completed are the prior art,
It is technology generally in the art, is not within the protection scope of the utility model.
The error calculation and modification method that error calculation and correction module are completed include reaction type adaptive calibration technology,
The foundation of the model of accurate Characterization power amplifier transmission equation is very important, Volterra series model is that complete description has note
Recall nonlinear system model the most classical, achievable memory polynomial model is a simplified Volterra grade in engineering
Exponential model, as shown in Figure 2.
A part of signal of power amplifier output coupling, exports Yn after digital-to-analogue conversion, by power adjustment, is input to preset training
Device, using above-mentioned model, by searching for table LUT, adaptive polo placement, the parameters compensated, so that error E n in model
Minimum improves output characteristics so that the error being finally reached between input Xn and power amplifier output signal characteristics is minimum.
Claims (3)
1. a kind of wideband predistortion power amplifier apparatus, it is characterised in that: connect function by delay line including input coupler
Rate amplifier issues main signal；Input coupler connects distortion correction module again, after sending main signal to distortion correction module,
It issues error output signal to be combined with main signal, is sent to the input terminal of power amplifier, carry out power amplification, power is put
The output end of big device connects back coupler, the output end connection output antenna of back coupler, while being connected under broadband and becoming
Frequency device, outputs signals to broadband low-converter, and broadband signal is reduced to 140MHz intermediate-freuqncy signal, is output to by broadband low-converter
Distortion correction module carries out error correction.
2. wideband predistortion power amplifier apparatus according to claim 1, it is characterised in that: the distortion correction module
Including error calculation and correction module and modulator, wherein error calculation and correction module receive frequency variation signal and carry out error calculation
With amendment, error amount is output to modulator, modulator connects input coupler, receives main signal, output error output signal.
3. wideband predistortion power amplifier apparatus according to claim 1, it is characterised in that: in broadband low-converter and
If bandpas filter is set between distortion correction module, filters out 5 times of additional spurious signals of signal bandwidth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821325112.4U CN208675192U (en) | 2018-08-16 | 2018-08-16 | A kind of wideband predistortion power amplifier apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821325112.4U CN208675192U (en) | 2018-08-16 | 2018-08-16 | A kind of wideband predistortion power amplifier apparatus |
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| Publication Number | Publication Date |
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| CN208675192U true CN208675192U (en) | 2019-03-29 |
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| CN201821325112.4U Active CN208675192U (en) | 2018-08-16 | 2018-08-16 | A kind of wideband predistortion power amplifier apparatus |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110212997A (en) * | 2019-06-04 | 2019-09-06 | 成都德芯数字科技股份有限公司 | A kind of acquisition methods and device for modulating the bit error rate |
| CN111147412A (en) * | 2019-12-25 | 2020-05-12 | 三维通信股份有限公司 | Predistortion processing device, signal transmission system and predistortion processing method |
| WO2020239043A1 (en) * | 2019-05-28 | 2020-12-03 | 中兴通讯股份有限公司 | Signal processing method and apparatus, and storage medium |
| CN117938096A (en) * | 2024-03-25 | 2024-04-26 | 成都市卫莱科技有限公司 | Efficient self-adaptive control system and method for linear power amplifier |
-
2018
- 2018-08-16 CN CN201821325112.4U patent/CN208675192U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020239043A1 (en) * | 2019-05-28 | 2020-12-03 | 中兴通讯股份有限公司 | Signal processing method and apparatus, and storage medium |
| CN110212997A (en) * | 2019-06-04 | 2019-09-06 | 成都德芯数字科技股份有限公司 | A kind of acquisition methods and device for modulating the bit error rate |
| CN110212997B (en) * | 2019-06-04 | 2022-02-22 | 成都德芯数字科技股份有限公司 | Method and device for acquiring modulation error rate |
| CN111147412A (en) * | 2019-12-25 | 2020-05-12 | 三维通信股份有限公司 | Predistortion processing device, signal transmission system and predistortion processing method |
| CN117938096A (en) * | 2024-03-25 | 2024-04-26 | 成都市卫莱科技有限公司 | Efficient self-adaptive control system and method for linear power amplifier |
| CN117938096B (en) * | 2024-03-25 | 2024-05-28 | 成都市卫莱科技有限公司 | Efficient self-adaptive control system and method for linear power amplifier |
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Address after: At 110179 Shenyang Road, Liaoning Province Hunnan New District No. 6 Patentee after: Zhonghong Huilian Technology Co.,Ltd. Address before: At 110179 Shenyang Road, Liaoning Province Hunnan New District No. 6 Patentee before: Shenyang Zhonghong Internet of things Technology Co.,Ltd. Address after: At 110179 Shenyang Road, Liaoning Province Hunnan New District No. 6 Patentee after: Shenyang Zhonghong Internet of things Technology Co.,Ltd. Address before: At 110179 Shenyang Road, Liaoning Province Hunnan New District No. 6 Patentee before: AOWEI FEIYUE COMMUNICATION Co.,Ltd. |
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