CN102694550B - Nonlinearity extractor of ultra-wideband radio-frequency power amplifier - Google Patents
Nonlinearity extractor of ultra-wideband radio-frequency power amplifier Download PDFInfo
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Abstract
The invention discloses a nonlinearity extractor of an ultra-wideband radio-frequency power amplifier. The nonlinearity extractor comprises a radio frequency neutralizing scheme and an intermediate frequency neutralizing scheme. The radio frequency neutralizing scheme includes: disposing an error separation module at a coupling end of a first coupler and an output end of a first attenuator, performing radio frequency neutralizing to radio frequency signals through the error separation module, and clearing linear amplified radio frequency components in the band to obtain error signals by separating. The intermediate frequency neutralizing scheme includes: disposing an error separation module at an output end of a first mixer and an output end of a second mixer, performing intermediate frequency neutralizing to low and intermediate frequency signals, and clearing linear amplified intermediate frequency components in the band to obtain error signals by separating. By the nonlinearity extractor, dynamic range of the obtained error signals is reduced greatly, high-speed analog to digital converter with lower conversion precision can be used to sample the error signals, and the requirement of conversion precision of the high-speed analog-digital converter in nonlinearity extraction of the ultra-wideband radio-frequency power amplifier is lowered greatly.
Description
Technical field
The present invention relates to a kind of nonlinear characteristic extraction element, especially relate to a kind of ultrabroad band radio-frequency power amplifier nonlinear characteristic extraction element.
Background technology
Modern broadband wireless communication system has extensively adopted the non-constant enveloped modulation mode such as OFDM (OFDM) and quadrature amplitude modulation (QAM), in order to ensure the transmission quality of signal, nearby frequency bands is not produced and disturbed simultaneously, very high to the linearity of the radio-frequency power amplifier in transmission system.Digital pre-distortion technology can ensure that radio-frequency power amplifier works in high efficiency state, can effectively improve again its linearity, is widely used at present in wireless communication system.
In digital pre-distortion technology, in order to carry out linearisation modeling, first must at least obtain the third order intermodulation signal (IMD3) of radio-frequency power amplifier, i.e. the nonlinear characteristic of radio-frequency power amplifier.In nonlinear characteristic leaching process, in order to ensure the dynamic range of signal transmission and the resolution of output signal, in nonlinear characteristic extraction element, need to have high conversion rate (bandwidth of sampling need to be the more than three times of signal transmission bandwidth) and high conversion accuracy (export bit length must at least more than 11 bits) for the analog to digital converter (A/D) of the output sampling at radio-frequency power amplifier, this class analog to digital converter is expensive; In addition along with spacing wave bandwidth up to 100MHz (as IMT-Advanced, the systems such as LTE+) development of even higher ultrabroad band wireless communication system, the switching rate of the analog to digital converter (A/D) for the output sampling at radio-frequency power amplifier in the nonlinear characteristic extraction element of ultrabroad band radio-frequency power amplifier is also wanted corresponding raising.Taking 160MHz signal as example, if gather third order intermodulation distortion, the switching rate of required analog to digital converter is just at least 960Msps, if will gather five rank crosstalks, required analog to digital converter switching rate need to be up to 1.6Gsps.With the manufacture craft level of current analog to digital converter, allow to reach so high conversion efficiency, be but difficult to reach the requirement of its conversion accuracy, so that existing analog to digital converter cannot be applied to the output signal sampling of ultrabroad band radio-frequency power amplifier, cannot extract the nonlinear characteristic of the ultrabroad band radio-frequency power amplifier that meets digital pre-distortion technology requirement, be difficult to it to carry out linearisation modeling, limited the development of broadband wireless communication technique.
Summary of the invention
Technical problem to be solved by this invention is to provide the contradiction between a kind of conversion accuracy and sampling rate that can overcome high-speed AD converter, use the high-speed AD converter of lower conversion accuracy to sample to the output signal of radio-frequency power amplifier, there is the ultrabroad band radio-frequency power amplifier nonlinear characteristic extraction element of lower cost.
The present invention solves the problems of the technologies described above adopted a kind of technical scheme: a kind of ultrabroad band radio-frequency power amplifier nonlinear characteristic extraction element, comprise the first coupler, the second coupler, the first frequency mixer, the second frequency mixer, the first attenuator, the first analog to digital converter, the second analog to digital converter and error separation module, the input of the first described coupler is used for accessing radio-frequency input signals, the output of the first described coupler is for connecting the signal input part of ultrabroad band radio-frequency power amplifier, the coupled end of the first described coupler is connected with the input of the first described frequency mixer, the output of the first described frequency mixer is connected with the input of the first described analog to digital converter, the input of the second described coupler is for connecting the signal output part of ultrabroad band radio-frequency power amplifier, the coupled end of the second described coupler is connected with the input of the first described attenuator, the output of the first described attenuator, the input of the coupled end of the first described coupler and the second described frequency mixer is connected with described error separation module respectively, the output of the second described frequency mixer is connected with the input of the second described analog to digital converter, between the first described frequency mixer and the second described frequency mixer, be provided with local oscillator module, described local oscillator module provides local oscillation signal to the first described frequency mixer and the second described frequency mixer.
Described error separation module comprises phase shifter and mixer, the input of described phase shifter is connected with the coupled end of described the first coupler, the output of described phase shifter is connected with an input of described mixer, the output of the first described attenuator is connected with another input of described mixer, and the output of described mixer is connected with the input of described the second frequency mixer.
The input of described phase shifter is connected by the second attenuator with the coupled end of described the first coupler.
The first described attenuator and the second described attenuator are variable attenuator, and described phase shifter is adjustable phase shifter.
The present invention solves the problems of the technologies described above adopted another kind of technical scheme: a kind of ultrabroad band radio-frequency power amplifier nonlinear characteristic extraction element, comprise the first coupler, the second coupler, the first frequency mixer, the second frequency mixer, the first attenuator, the first analog to digital converter, the second analog to digital converter and error separation module, the input of the first described coupler is used for accessing radio-frequency input signals, the output of the first described coupler is for connecting the signal input part of ultrabroad band radio-frequency power amplifier, the coupled end of the first described coupler is connected with the input of the first described frequency mixer, the output of the first described frequency mixer is connected with the input of the first described analog to digital converter, the input of the second described coupler is for connecting the signal output part of ultrabroad band radio-frequency power amplifier, the coupled end of the second described coupler is connected with the input of the first described attenuator, the output of the first described attenuator is connected with the input of the second described frequency mixer, the output of the second described frequency mixer, the input of the output of the first described frequency mixer and the second described analog to digital converter is connected with described error separation module respectively, between the first described frequency mixer and the second described frequency mixer, be provided with local oscillator module, described local oscillator module provides local oscillation signal to the first described frequency mixer and the second described frequency mixer.
Described error separation module comprises phase shifter and mixer, the input of described phase shifter is connected with the output of described the first frequency mixer, the output of described phase shifter is connected with an input of described mixer, the output of the second described frequency mixer is connected with another input of described mixer, and the output of described mixer is connected with the input of described the second analog to digital converter.
The input of described phase shifter is connected by the second attenuator with the output of described the first frequency mixer.
The first described attenuator and the second described attenuator are variable attenuator, and described phase shifter is adjustable phase shifter.
Compared with prior art, the invention has the advantages that the error separation module by arranging carries out radio frequency counteracting to radiofrequency signal, remove band internal linear and amplify radio-frequency component, or the Low Medium Frequency signal after mixing is carried out to intermediate frequency counteracting, the intermediate frequency component that removal is amplified with internal linear, can isolate the non-linear error signal causing of ultrabroad band radio-frequency power amplifier, the error signal dynamic range obtaining thus reduces greatly, the high-speed AD converter that therefore can utilize conversion accuracy to be less than 11 bits is sampled to this error signal, meeting under the prerequisite of wideband sampling needs like this, greatly reduce the requirement of the conversion accuracy to analog to digital converter, effectively reduce the requirement of wideband digital predistortion technology to high-speed AD converter conversion accuracy, can reduce costs, promote the development of broadband wireless communication technique,
In the time that error separation module only comprises phase shifter and mixer, first the signal phase shift 180 by phase shifter, the signal input part of ultrabroad band radio-frequency power amplifier being coupled out is spent, then the signal being coupled out with the signal output part of ultrabroad band radio-frequency power amplifier carries out vector superposed in mixer, by adjusting the amplitude of two paths of signals, balance out the not distorted signal of linear transfer, thereby isolate due to the non-linear error signal causing of ultrabroad band radio-frequency power amplifier, the dynamic range of the error signal obtaining thus will reduce greatly, the high-speed AD converter that therefore can utilize conversion accuracy to be less than 11 bits is sampled to this error signal,
In the time being also provided with the second attenuator in error separation module, can regulate more accurately the amplitude balance between the signal being coupled out from signal input part and the signal output part of ultrabroad band radio-frequency power amplifier, error is extracted more accurate;
When the first attenuator and the second attenuator are variable attenuator, when phase shifter is adjustable phase shifter, the phase shift that the signal that signal input part that can fine adjustment ultrabroad band radio-frequency power amplifier is coupled out causes because of devices such as couplers, the signal phase that the signal output part of this signal and ultrabroad band radio-frequency power amplifier is coupled out differs 180 °, offset more accurately not distorted signal, realize the extracted with high accuracy of ultrabroad band radio-frequency power amplifier nonlinear characteristic.
Brief description of the drawings
Fig. 1 is the theory diagram of first technical scheme of the present invention;
Fig. 2 is the theory diagram of the embodiment mono-of first technical scheme of the present invention;
Fig. 3 is the theory diagram of the embodiment bis-of first technical scheme of the present invention;
Fig. 4 is the theory diagram of second technical scheme of the present invention;
Fig. 5 is the theory diagram of the embodiment mono-of second technical scheme of the present invention;
Fig. 6 is the theory diagram of the embodiment bis-of second technical scheme of the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the present invention.
The present invention mainly provides two technical schemes, wherein first technical scheme is radio frequency cancellation scheme: as shown in Figure 1, a kind of ultrabroad band radio-frequency power amplifier nonlinear characteristic extraction element, comprise the first coupler 1, the second coupler 2, the first frequency mixer 3, the second frequency mixer 4, the first attenuator 5, the first analog to digital converter 6, the second analog to digital converter 7 and error separation module 9, the input of the first coupler 1 is used for accessing radio-frequency input signals RF1, the output of the first coupler 1 is used for connecting the signal input part of radio-frequency (RF) power amplification 10 (being ultrabroad band radio-frequency power amplifier), the coupled end of the first coupler 1 is connected with the input of the first frequency mixer 3, the output of the first frequency mixer 3 is connected with the input of the first analog to digital converter 6, the input of the second coupler 2 is for connecting the signal output part of radio-frequency (RF) power amplification 10, the coupled end of the second coupler 2 is connected with the input of the first attenuator 5, the output of the first attenuator 5, the input of the coupled end of the first coupler 1 and the second frequency mixer 4 is connected with error separation module 9 respectively, the output of the second frequency mixer 4 is connected with the input of the second analog to digital converter 7, between the first frequency mixer 3 and the second frequency mixer 4, be provided with local oscillator module 8, local oscillator module 8 provides local oscillation signal to the first frequency mixer 3 and the second frequency mixer 4.
Embodiment mono-: as shown in Figure 2, a kind of ultrabroad band radio-frequency power amplifier nonlinear characteristic extraction element, comprise the first coupler 1, the second coupler 2, the first frequency mixer 3, the second frequency mixer 4, the first attenuator 5, the first analog to digital converter 6, the second analog to digital converter 7 and error separation module 9, the input of the first coupler 1 is used for accessing radio-frequency input signals RF1, the output of the first coupler 1 is used for connecting the signal input part of radio-frequency (RF) power amplification 10 (being ultrabroad band radio-frequency power amplifier), the coupled end of the first coupler 1 is connected with the input of the first frequency mixer 3, the output of the first frequency mixer 3 is connected with the input of the first analog to digital converter 6, the input of the second coupler 2 is for connecting the signal output part of radio-frequency (RF) power amplification 10, the coupled end of the second coupler 2 is connected with the input of the first attenuator 5, error separation module 9 comprises phase shifter 91 and mixer 92, the input of phase shifter 91 is connected with the coupled end of the first coupler 1, the output of phase shifter 91 is connected with an input of mixer 92, the output of the first attenuator 5 is connected with another input of mixer 92, the output of mixer 92 is connected with the input of the second frequency mixer 4, the output of the second frequency mixer 4 is connected with the input of the second analog to digital converter 7, between the first frequency mixer 3 and the second frequency mixer 4, be provided with local oscillator module 8, local oscillator module 8 provides local oscillation signal to the first frequency mixer 3 and the second frequency mixer 4.
In above-mentioned specific embodiment, the first attenuator 5 can be variable attenuator, and phase shifter 91 can be adjustable phase shifter.
In above-mentioned specific embodiment, it is hundreds of Msps that the first analog to digital converter 6 can adopt switching rate, sample conversion precision is sampling with high precision chip more than 12 bits, and more than the second analog to digital converter 7 adopts switching rate 1Gsps, sample conversion precision is the low precision high-speed sampling chip of 8 bits.
When a kind of ultrabroad band radio-frequency power amplifier nonlinear characteristic extraction element in employing the present embodiment extracts the nonlinear characteristic of ultrabroad band radio-frequency power amplifier, the input access radio-frequency input signals RF1 of the first coupler 1, the output of the first coupler 1 connects the signal input part of radio-frequency (RF) power amplification 10, the input of the second coupler 2 connects the signal output part of radio-frequency (RF) power amplification 10, its operation principle is: radio-frequency input signals RF1 is coupled out the first radiofrequency signal RF3 by the first coupler 1 before input radio frequency power amplifier 10, the first radiofrequency signal RF3 is divided into two-way, one tunnel is directly inputted in the first frequency mixer 3, an input of mixer 92 is inputted on another road after phase shifter 91 phase shift 180 degree, radio-frequency input signals RF1 is by rear output the second radiofrequency signal RF2 of radio-frequency (RF) power amplification 10 (signal after being radio-frequency input signals RF1 distortion), the second radiofrequency signal RF2 is coupled out the 3rd radiofrequency signal RF4 by the second coupler 2, the 3rd radiofrequency signal RF4 inputs another input of mixer 92 after the first attenuator 5 decay, mixer 92 carries out the two paths of signals receiving after vector superposed obtain error signal RF5 and be entered in the second frequency mixer 4, the first radiofrequency signal RF3 carries out down-conversion by the first frequency mixer 3 and obtains the first Low Medium Frequency signal IF1, the first Low Medium Frequency signal IF1 inputs in the first analog to digital converter 6 and carries out data acquisition, the digital signal that the first analog to digital converter 6 gathers is the undistorted original input signal of high accuracy of radio-frequency (RF) power amplification 10, error signal RF5 carries out down-conversion by the second frequency mixer 4 and obtains the second Low Medium Frequency signal IF2, the second Low Medium Frequency signal IF2 inputs in the second analog to digital converter 7 and carries out data acquisition, now, owing to isolating by the non-linear error signal causing of radio-frequency (RF) power amplification 10 by error separation module 9, therefore the dynamic range of the second Low Medium Frequency signal IF2 obtaining reduces greatly, sample conversion precision is that the low precision high-speed sampling chip of 8 bits can successfully be realized sampling, the digital signal that the second analog to digital converter 7 gathers is the nonlinear characteristic signal of the radio-frequency (RF) power amplification 10 of the large bandwidth of low precision, complete thus the extraction of radio-frequency (RF) power amplification 10 nonlinear characteristics.
Embodiment bis-: as shown in Figure 3, the present embodiment and embodiment mono-are basic identical, its difference is only that the input of phase shifter 91 and the coupled end of the first coupler 1 are connected by the second attenuator 93, in the time having increased by the second attenuator 93, can regulate more accurately the amplitude balance between the signal being coupled out from signal input part and the signal output part of radio-frequency (RF) power amplification 10, error be extracted more accurate.
In above-mentioned specific embodiment, the first attenuator 5 and the second attenuator 93 can be variable attenuator, and phase shifter 91 can be adjustable phase shifter.
Second technical scheme of the present invention is intermediate frequency cancellation scheme: as shown in Figure 4, a kind of ultrabroad band radio-frequency power amplifier nonlinear characteristic extraction element, comprise the first coupler 1, the second coupler 2, the first frequency mixer 3, the second frequency mixer 4, the first attenuator 5, the first analog to digital converter 6, the second analog to digital converter 7 and error separation module 9, the input of the first coupler 1 is used for accessing radio-frequency input signals RF1, the output of the first coupler 1 is for connecting the signal input part of radio-frequency (RF) power amplification 10, the coupled end of the first coupler 1 is connected with the input of the first frequency mixer 3, the output of the first frequency mixer 3 is connected with the input of the first analog to digital converter 6, the input of the second coupler 2 is for connecting the signal output part of radio-frequency (RF) power amplification 10, the coupled end of the second coupler 2 is connected with the input of the first attenuator 5, the output of the first attenuator 5 is connected with the input of the second frequency mixer 4, the output of the second frequency mixer 4, the input of the output of the first frequency mixer 3 and the second analog to digital converter 7 is connected with error separation module 9 respectively, between the first frequency mixer 3 and the second frequency mixer 4, be provided with local oscillator module 8, local oscillator module 8 provides local oscillation signal to the first frequency mixer 3 and the second frequency mixer 4.
Embodiment mono-: as shown in Figure 5, a kind of ultrabroad band radio-frequency power amplifier nonlinear characteristic extraction element, comprise the first coupler 1, the second coupler 2, the first frequency mixer 3, the second frequency mixer 4, the first attenuator 5, the first analog to digital converter 6, the second analog to digital converter 7 and error separation module 9, the input of the first coupler 1 is used for accessing radio-frequency input signals RF1, the output of the first coupler 1 is for connecting the signal input part of radio-frequency (RF) power amplification 10, the coupled end of the first coupler 1 is connected with the input of the first frequency mixer 3, the output of the first frequency mixer 3 is connected with the input of the first analog to digital converter 6, the input of the second coupler 2 is for connecting the signal output part of radio-frequency (RF) power amplification 10, the coupled end of the second coupler 2 is connected with the input of the first attenuator 5, the output of the first attenuator 5 is connected with the input of the second frequency mixer 4, error separation module 9 comprises phase shifter 91 and mixer 92, the input of phase shifter 91 is connected with the output of the first frequency mixer 3, the output of phase shifter 91 is connected with an input of mixer 92, the output of the second frequency mixer 4 is connected with another input of mixer 92, the output of mixer 92 is connected with the input of the second analog to digital converter 7, between the first frequency mixer 3 and the second frequency mixer 4, be provided with local oscillator module 8, local oscillator module 8 provides local oscillation signal to the first frequency mixer 3 and the second frequency mixer 4.
In above-mentioned specific embodiment, the first attenuator 5 can be variable attenuator, and phase shifter 91 can be adjustable phase shifter.
In above-mentioned specific embodiment, it is that hundreds of Msps, sample conversion precision are sampling with high precision chips more than 12 bits that the first analog to digital converter 6 can adopt switching rate, and the second analog to digital converter 7 adopts that switching rate 1Gsps is above, sample conversion precision is the low precision high-speed sampling chip of 8 bits.
When a kind of ultrabroad band radio-frequency power amplifier nonlinear characteristic extraction element in employing the present embodiment extracts the nonlinear characteristic of ultrabroad band radio-frequency power amplifier, the input access radio-frequency input signals RF1 of the first coupler 1, the output of the first coupler 1 connects the signal input part of radio-frequency (RF) power amplification 10, the input of the second coupler 2 connects the signal output part of radio-frequency (RF) power amplification 10, its operation principle is: radio-frequency input signals RF1 is coupled out the first radiofrequency signal RF3 by the first coupler 1 before input radio frequency power amplifier 10, the first radiofrequency signal RF3 inputs in the first frequency mixer 3 and carries out obtaining the first Low Medium Frequency signal IF1 after down-conversion, radio-frequency input signals RF1 is by rear output the second radiofrequency signal RF2 of radio-frequency (RF) power amplification 10 (be radio-frequency input signals RF1 distortion after signal), the second radiofrequency signal RF2 is coupled out the 3rd radiofrequency signal RF4 by the second coupler 2, the 3rd radiofrequency signal RF4 inputs in the second frequency mixer 4 and carries out obtaining the second Low Medium Frequency signal IF2 after down-conversion after the first attenuator 5 decay, the first Low Medium Frequency signal IF1 is divided into two-way, data acquisition is directly carried out in input the first analog to digital converter 6 in one tunnel, the digital signal that the first analog to digital converter 6 gathers is the undistorted original input signal of high accuracy of radio-frequency (RF) power amplification 10, an input of mixer 92 is inputted on one tunnel after phase shifter 91 phase shift 180 degree, another input of the second Low Medium Frequency signal IF2 input mixer 92, mixer 92 carries out the two paths of signals receiving after vector superposed to obtain error signal IF3 and outputed in the second analog to digital converter 7 carrying out data acquisition, now, owing to isolating due to the non-linear error signal causing of radio-frequency (RF) power amplification 10 by error separation module 9, the dynamic range of the error signal IF3 obtaining thus reduces greatly, sample conversion precision is that the low precision high-speed sampling chip of 8 bits can successfully be realized sampling, the digital signal that the second analog to digital converter 7 gathers is the nonlinear characteristic signal of the radio-frequency (RF) power amplification 10 of the large bandwidth of low precision, complete thus the extraction of radio-frequency (RF) power amplification 10 nonlinear characteristics.
Embodiment bis-: as shown in Figure 6, the present embodiment and embodiment mono-are basic identical, its difference is only that the input of phase shifter 91 and the output of the first frequency mixer 3 are connected by the second attenuator 93, in the time having increased by the second attenuator 93, can regulate more accurately the amplitude balance between the signal being coupled out from power amplifier input and output, error be extracted more accurate.
In above-mentioned specific embodiment, the first attenuator 5 and the second attenuator 93 can be variable attenuator, and phase shifter 91 can be adjustable phase shifter.
Coupler, frequency mixer, phase shifter, attenuator, mixer, local oscillator module and analog to digital converter in the present invention all can adopt the matured product of the art.
Claims (2)
1. a ultrabroad band radio-frequency power amplifier nonlinear characteristic extraction element, it is characterized in that comprising the first coupler, the second coupler, the first frequency mixer, the second frequency mixer, the first attenuator, the first analog to digital converter, the second analog to digital converter and error separation module, the input of the first described coupler is used for accessing radio-frequency input signals, the output of the first described coupler is for connecting the signal input part of ultrabroad band radio-frequency power amplifier, the coupled end of the first described coupler is connected with the input of the first described frequency mixer, the output of the first described frequency mixer is connected with the input of the first described analog to digital converter, the input of the second described coupler is for connecting the signal output part of ultrabroad band radio-frequency power amplifier, the coupled end of the second described coupler is connected with the input of the first described attenuator, the output of the first described attenuator, the input of the coupled end of the first described coupler and the second described frequency mixer is connected with described error separation module respectively, the output of the second described frequency mixer is connected with the input of the second described analog to digital converter, between the first described frequency mixer and the second described frequency mixer, be provided with local oscillator module, described local oscillator module provides local oscillation signal to the first described frequency mixer and the second described frequency mixer,
Described error separation module comprises phase shifter and mixer, the input of described phase shifter is connected with the coupled end of described the first coupler, the output of described phase shifter is connected with an input of described mixer, the output of the first described attenuator is connected with another input of described mixer, and the output of described mixer is connected with the input of described the second frequency mixer;
The input of described phase shifter is connected by the second attenuator with the coupled end of described the first coupler;
The first described attenuator and the second described attenuator are variable attenuator, and described phase shifter is adjustable phase shifter.
2. a ultrabroad band radio-frequency power amplifier nonlinear characteristic extraction element, it is characterized in that comprising the first coupler, the second coupler, the first frequency mixer, the second frequency mixer, the first attenuator, the first analog to digital converter, the second analog to digital converter and error separation module, the input of the first described coupler is used for accessing radio-frequency input signals, the output of the first described coupler is for connecting the signal input part of ultrabroad band radio-frequency power amplifier, the coupled end of the first described coupler is connected with the input of the first described frequency mixer, the output of the first described frequency mixer is connected with the input of the first described analog to digital converter, the input of the second described coupler is for connecting the signal output part of ultrabroad band radio-frequency power amplifier, the coupled end of the second described coupler is connected with the input of the first described attenuator, the output of the first described attenuator is connected with the input of the second described frequency mixer, the output of the second described frequency mixer, the input of the output of the first described frequency mixer and the second described analog to digital converter is connected with described error separation module respectively, between the first described frequency mixer and the second described frequency mixer, be provided with local oscillator module, described local oscillator module provides local oscillation signal to the first described frequency mixer and the second described frequency mixer,
Described error separation module comprises phase shifter and mixer, the input of described phase shifter is connected with the output of described the first frequency mixer, the output of described phase shifter is connected with an input of described mixer, the output of the second described frequency mixer is connected with another input of described mixer, and the output of described mixer is connected with the input of described the second analog to digital converter;
The input of described phase shifter is connected by the second attenuator with the output of described the first frequency mixer;
The first described attenuator and the second described attenuator are variable attenuator, and described phase shifter is adjustable phase shifter.
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| CN107885942B (en) * | 2017-11-13 | 2021-01-19 | 宁波大学 | Analog predistortion system based on memory effect compensation |
| CN114039667A (en) * | 2021-12-07 | 2022-02-11 | 电子科技大学 | Microwave optical subsystem with nonlinear distortion compensation frequency conversion phase shift function |
| CN114172465B (en) * | 2022-02-09 | 2022-05-13 | 成都嘉纳海威科技有限责任公司 | Ultra-wideband active amplification phase shifter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1947777A2 (en) * | 2007-01-19 | 2008-07-23 | NEC Electronics Corporation | Multi-band RF receiver |
| CN101262457A (en) * | 2007-03-07 | 2008-09-10 | 中兴通讯股份有限公司 | A time division duplex linear power amplification module with digital pre-distortion technology |
| CN201966902U (en) * | 2011-03-10 | 2011-09-07 | 山东泉清通信有限责任公司 | Multi-channel radio frequency circuit with high consistency |
-
2012
- 2012-05-18 CN CN201210157352.9A patent/CN102694550B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1947777A2 (en) * | 2007-01-19 | 2008-07-23 | NEC Electronics Corporation | Multi-band RF receiver |
| CN101262457A (en) * | 2007-03-07 | 2008-09-10 | 中兴通讯股份有限公司 | A time division duplex linear power amplification module with digital pre-distortion technology |
| CN201966902U (en) * | 2011-03-10 | 2011-09-07 | 山东泉清通信有限责任公司 | Multi-channel radio frequency circuit with high consistency |
Non-Patent Citations (2)
| Title |
|---|
| 任坤胜等.基于并行Hammerstein的宽带射频功放动态非线性建模.《2007年全国微波毫米波会议论文集》.2007,第1255-1258页. * |
| 基于并行Hammerstein的宽带射频功放动态非线性建模;任坤胜等;《2007年全国微波毫米波会议论文集》;20071001;第1255-1258页 * |
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