WO2019205171A1 - 一种射频接收机、射频发射机及通信设备 - Google Patents

一种射频接收机、射频发射机及通信设备 Download PDF

Info

Publication number
WO2019205171A1
WO2019205171A1 PCT/CN2018/085188 CN2018085188W WO2019205171A1 WO 2019205171 A1 WO2019205171 A1 WO 2019205171A1 CN 2018085188 W CN2018085188 W CN 2018085188W WO 2019205171 A1 WO2019205171 A1 WO 2019205171A1
Authority
WO
WIPO (PCT)
Prior art keywords
nonlinear
circuit
radio frequency
module
correction
Prior art date
Application number
PCT/CN2018/085188
Other languages
English (en)
French (fr)
Inventor
郑玉山
张福泉
汪金铭
Original Assignee
华为技术有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2018/085188 priority Critical patent/WO2019205171A1/zh
Priority to EP18916406.4A priority patent/EP3780388A4/en
Priority to CN201880092793.0A priority patent/CN112042114B/zh
Publication of WO2019205171A1 publication Critical patent/WO2019205171A1/zh
Priority to US17/080,058 priority patent/US11387785B2/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
    • H03F3/245—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages with semiconductor devices only
    • 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
    • H03F1/3276—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits using the nonlinearity inherent to components, e.g. a diode
    • 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
    • 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
    • H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
    • H03F1/3252—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits using multiple parallel paths between input and output
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/213—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only in integrated circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0475—Circuits with means for limiting noise, interference or distortion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/294—Indexing scheme relating to amplifiers the amplifier being a low noise amplifier [LNA]
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/336—A I/Q, i.e. phase quadrature, modulator or demodulator being used in an amplifying circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/451—Indexing scheme relating to amplifiers the amplifier being a radio frequency amplifier
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2201/00—Indexing scheme relating to details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements covered by H03F1/00
    • H03F2201/32—Indexing scheme relating to modifications of amplifiers to reduce non-linear distortion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0408—Circuits with power amplifiers
    • H04B2001/0416—Circuits with power amplifiers having gain or transmission power control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the embodiments of the present invention relate to the field of circuit technologies, and in particular, to a radio frequency receiver, a radio frequency transmitter, and a communication device.
  • a communication device for example, a base station or the like can radiate a radio frequency signal having a higher frequency into an electromagnetic wave through an antenna, and then wirelessly communicate with other communication devices using the electromagnetic wave as a medium.
  • the base station generally includes a baseband (BB) circuit and a radio frequency (RF) transceiver.
  • the radio frequency transceiver may further include a radio frequency transmitter and a radio frequency receiver.
  • the baseband circuit is used to transmit the unmodulated baseband signal
  • the radio frequency transceiver is used to modulate the baseband signal to a higher frequency and power.
  • the larger RF signal is transmitted to the other communication device through the antenna; the process of receiving the signal by the base station is opposite to the transmission process, and is not described here.
  • MIMO multiple input multiple output
  • FIG. 1 is a schematic structural diagram of a multi-channel RF transmitter in the prior art.
  • the radio frequency signal output from the modulation and demodulation circuit 10 is input to the amplifying circuit 20, and the amplifying circuit 20 inputs the amplified radio frequency signal to the antenna 30 and transmits it to the other device through the antenna 30 for communication.
  • each of the RF transmitters further includes a correction circuit 40 for correcting nonlinear distortion generated by the amplification circuit 20 to improve the even or odd linearity of the RF transmitter, wherein each transmission The channel correction circuits 40 are independent of each other.
  • the radio frequency receiver, the radio frequency transmitter and the communication device provided by the embodiments of the present application introduce a master correction circuit to superimpose N discrete slave correction circuit architectures, so that multiple channels share the main correction circuit to correct the radio frequency receiver. Or nonlinear distortion in the RF transmitter, which reduces the power consumption of the calibration.
  • an embodiment of the present application provides a radio frequency transmitter, including: N (N is a positive integer greater than 1) transmission channels, each of which includes a nonlinear module; a primary correction circuit, respectively N non-linear modules corresponding to the N transmit channels are coupled to provide a main correction signal for the N non-linear modules; and N slave correction circuits, the N slave correction circuits are respectively coupled to the N non-linear modules, each a slave correction circuit for providing a slave correction signal to a non-linear module coupled thereto; wherein the slave correction signal provided by the master correction signal and the first slave correction circuit (ie, any of the slave slave correction circuits) is available for Correcting nonlinear distortion of the first nonlinear module (ie, the nonlinear module coupled with the first slave correction circuit), that is, the nonlinear distortion generated by each nonlinear module may be matched by the primary correction signal and the nonlinear module Corrected from the correction signal.
  • N is a positive integer greater than 1
  • transmission channels each of which includes a nonlinear
  • the nonlinear distortion of each nonlinear module can be divided into two parts, a nonlinear distortion (A) and a nonlinear distortion (B), and correspondingly, each correction circuit shown in FIG. In 40, it is necessary to include the arithmetic logic required to correct the two parts of the nonlinear distortion.
  • a master correction circuit is superimposed on the structure of N discrete slave correction circuits, so that the nonlinear distortion generated in each channel can use the main correction circuit and the correction signal generated by superimposing the correction circuit.
  • the nonlinear distortion (A) of each nonlinear module is corrected by the main correction signal provided by the main correction circuit, and the nonlinear distortion (B) of the nonlinear module is corresponding to the slave correction circuit corresponding thereto
  • the correction provided is corrected from the correction signal. Therefore, it is not necessary to provide a correction circuit in each channel that can completely correct the nonlinear distortion of the nonlinear module in the channel.
  • the nonlinear distortion (A) is corrected by multiplexing a main correction circuit, and the nonlinear distortion (B) in each nonlinear module is corrected in accordance with the N slave correction circuits, compared to the correction circuit 40 of FIG.
  • the overall arithmetic logic of the nonlinear correction is simpler, and the corresponding power consumption is also lower, thereby reducing the power consumption of the correction while ensuring the correction accuracy comparable to the prior art.
  • each non-linear module includes a non-linear device and a power supply module, wherein the power supply module is configured to adjust a power supply of the non-linear module corresponding to the power supply module according to the correction signal, where the correction signal includes : the main correction signal and the slave correction signal supplied to the power supply module.
  • the primary correction circuit is configured to: obtain a first feedback signal from an output signal of each of the N nonlinear modules; and obtain the N first feedback signals according to the obtained Generating a predistortion signal; and inputting the predistortion signal (ie, the main correction signal) to each of the N non-linear modules corresponding to the power supply module.
  • the predistortion signal ie, the main correction signal
  • each of the N slave correction circuits is configured to: acquire a second feedback signal from a signal output by the nonlinear module corresponding to the slave correction circuit; according to the second The feedback signal acquires a power supply control signal when the linearity is less than or equal to a preset threshold; and inputs the power supply control signal (ie, from the correction signal) to a power supply module corresponding to the nonlinear module.
  • the primary correction signal is used to calibrate the first nonlinear distortion coexisting in the N nonlinear modules, and each slave correction signal provided from the correction circuit is used to correct the corresponding nonlinear module.
  • each slave correction signal provided from the correction circuit is used to correct the corresponding nonlinear module.
  • the nonlinear distortion of each nonlinear module is divided into a common part and a difference part, wherein the common part is called the first nonlinear distortion, and the difference part is called the nonlinear distortion, as shown in FIG.
  • the correction circuit 40 corresponding to each transmission channel needs to complete the correction of the two types of nonlinear distortions. Therefore, the design of the correction circuit is complicated, and the power consumption and the area are small.
  • all the transmission channels can correct the first nonlinear distortion generated by the nonlinear module through a main correction circuit, and each correction circuit 40 includes correction according to the prior art.
  • each slave correction circuit can also correct the nonlinear distortion generated by its nonlinear module, thus saving the correction resources and ensuring the accuracy of the nonlinear distortion correction.
  • the first nonlinear distortion is caused by a common first distortion factor
  • the second nonlinear distortion is caused by a second distortion factor of the difference. That is to say, for the coexisting first nonlinear distortion caused by the first distortion factor among the N transmission channels, the main correction circuit can be used to uniformly correct the respective transmission channels, so that it is not required to be set in each transmission channel.
  • a primary correction circuit that greatly reduces resources such as the area occupied by the entire RF transmitter and the power consumed.
  • the correction channel can be used to correct the respective transmission channels, which can improve the calibration accuracy and accuracy of the entire RF transmitter.
  • each of the N slave correction circuits includes: a feedback circuit and a dummy circuit, and the dummy circuit is used to reproduce a nonlinear characteristic of the corresponding nonlinear module; the dummy circuit The input end is coupled to the input end of the non-linear module, the output end of the dummy circuit is coupled to the input end of the feedback circuit, and the output end of the feedback circuit is coupled to the input end of the power supply module in the non-linear module;
  • the feedback circuit is configured to obtain a bias voltage or a bias current when the linearity is less than or equal to a preset threshold, and the bias voltage or the bias current is a slave correction signal.
  • the RF signal input to the nonlinear module is also input to the dummy circuit, and the nonlinear characteristics appearing in the nonlinear module also appear in the dummy circuit.
  • the dummy circuit can input the output signal with nonlinear distortion as the second feedback signal to the feedback circuit, and the feedback circuit continuously updates the bias voltage or the bias current of the dummy circuit until the output signal and the input signal of the dummy circuit
  • the feedback circuit can input the bias voltage or the bias current at this time as a correction signal to the power supply module of the nonlinear module, so that the nonlinear device of the nonlinear module can be at the bias voltage or bias.
  • the linearity of the output signal of the nonlinear module and the input signal will also reach an optimized state with less nonlinear distortion.
  • the feedback circuit since the feedback circuit only needs to input the finally obtained power supply control signal to the nonlinear module at one time, the nonlinear state of the non-linear module is not affected in the whole process of the nonlinear correction of the feedback circuit and the dummy circuit, thereby The effect of the calibration process on the main path signal can be reduced.
  • the above-mentioned correction circuit may generate a slave correction signal by using an analog predistortion APD, and the master correction circuit may generate a master correction signal by using an APD correction circuit or a digital predistortion DPD.
  • the primary correction circuit described above is configured to be independently enabled or disabled, the secondary correction circuit being configured to be enabled or disabled independently.
  • the radio frequency transmitter described above is used for beamforming or carrier aggregation.
  • the nonlinear device in the above non-linear module may be at least one of a power amplifier PA, a mixer mixer or a variable gain amplifier VGA.
  • an embodiment of the present application provides a radio frequency receiver, including: N (N is a positive integer greater than 1) receiving channels, each receiving channel includes a nonlinear module; a primary correcting circuit, respectively N non-linear modules corresponding to the N receiving channels are coupled to provide a main correction signal for the N non-linear modules; and N slave correction circuits, the N slave correction circuits are respectively coupled to the N non-linear modules, Each slave correction circuit is used to provide a slave correction signal for a non-linear module coupled thereto.
  • the slave correction signal provided by the primary correction signal and the first slave correction circuit can be used to correct the first nonlinear module (ie, the nonlinear module coupled to the first slave correction circuit)
  • the nonlinear distortion that is, the nonlinear distortion generated by each nonlinear module, is corrected by the main correction signal and the slave correction signal corresponding to the nonlinear module.
  • each of the above non-linear modules further includes a non-linear device and a power supply module, wherein the power supply module is configured to adjust a power supply of the non-linear module corresponding to the power supply module according to the correction signal, the correction The signal includes: the primary correction signal and a secondary correction signal provided to the power supply module.
  • the nonlinear device in the above non-linear module may be at least one of a low noise amplifier, a mixer or a variable gain amplifier.
  • each of the N slave correction circuits is coupled to the nonlinear module in the corresponding receiving channel by an adder, and the master correction circuit also passes the adder
  • Each of the N receive channels is coupled separately.
  • the main correction circuit is a first digital-to-analog converter DAC
  • each of the N slave correction circuits is a second DAC.
  • the primary correction signal is used to calibrate the first nonlinear distortion coexisting in the N nonlinear modules, and each slave correction signal provided from the correction circuit is used to correct the corresponding nonlinear module.
  • each slave correction signal provided from the correction circuit is used to correct the corresponding nonlinear module.
  • the first nonlinear distortion is caused by a common first distortion factor, which is caused by the second distortion factor of the difference.
  • the radio frequency receiver described above is used for beamforming or carrier aggregation.
  • an embodiment of the present application provides a radio frequency transmitter, including: N transmit channels, each of which includes a nonlinear module, each non-linear module including a power supply module and a nonlinear device, where N is a positive integer greater than 1; N correction circuits respectively coupled to the N non-linear modules, wherein each correction circuit includes a feedback circuit and a dummy dummy circuit for reproducing the corresponding non- a nonlinear characteristic of the linear module; an input end of the dummy circuit is coupled to an input end of the nonlinear module, an output end of the dummy circuit is coupled to an input end of the feedback circuit, and an output end of the feedback circuit and the nonlinear module are The input end of the power supply module is coupled; wherein the feedback circuit is configured to generate a correction signal according to a bias voltage or a bias current of the dummy circuit to correct nonlinear distortion generated by the nonlinear module.
  • the feedback circuit is specifically configured to: detect a bias voltage or a bias current when the linearity is less than or equal to a preset threshold, and correct the bias voltage or the bias current.
  • the nonlinear distortion produced by the nonlinear module is specifically configured to: detect a bias voltage or a bias current when the linearity is less than or equal to a preset threshold, and correct the bias voltage or the bias current.
  • an embodiment of the present application provides a radio frequency transceiver chip, including any of the above radio frequency transmitters and radio frequency transmitters.
  • an embodiment of the present application provides a communications apparatus, including any one of the foregoing radio frequency transmitters and a baseband processor, where the radio frequency transmitter is coupled to a baseband processor; wherein the radio frequency transmitter is configured to output the baseband processor The baseband signal is converted into a transmitted signal and the transmitted signal is output through an antenna.
  • an embodiment of the present application provides a communications apparatus, including any one of the foregoing radio frequency receivers and a baseband processor, where the radio frequency receiver is coupled to a baseband processor; wherein the radio frequency receiver is configured to receive the received antenna The signal is converted to a baseband signal and the baseband signal is input to a baseband processor.
  • the names of the components in the radio frequency transmitter, the radio frequency receiver, and the radio frequency transceiver are not limited to the circuit itself. In actual implementation, these components may appear under other names. As long as the functions of the various components are similar to the embodiments of the present application, they are within the scope of the claims and their equivalents.
  • FIG. 1 is a schematic structural view of a radio frequency transmitter in the prior art
  • FIG. 2 is a schematic structural diagram of a radio frequency transceiver according to an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram 1 of a radio frequency transmitter according to an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram 2 of a radio frequency transmitter according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic structural diagram 3 of a radio frequency transmitter according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram 4 of a radio frequency transmitter according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram 5 of a radio frequency transmitter according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram 6 of a radio frequency transmitter according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram 1 of a radio frequency receiver according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram 2 of a radio frequency receiver according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram 3 of a radio frequency receiver according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram 4 of a radio frequency receiver according to an embodiment of the present application.
  • first and second are used for descriptive purposes only, and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining “first” and “second” may include one or more of the features either explicitly or implicitly. In the description of the embodiments of the present application, “multiple” means two or more unless otherwise stated.
  • Nonlinear distortion can also be called waveform distortion, nonlinear distortion, etc., which is characterized by the fact that the output signal of the RF transceiver does not have a linear relationship with the input signal, so that a new harmonic wave component is generated in the output signal. .
  • the nonlinear distortion may further include even distortion caused by even harmonics and odd distortion caused by odd harmonics.
  • even harmonics the harmonic whose rated frequency is an even multiple of the fundamental frequency
  • odd harmonic the harmonic whose rated frequency is an odd multiple of the fundamental frequency
  • the even harmonic is generally present.
  • an additional correction circuit can usually be set in the transmitting circuit or the receiving circuit of the RF transceiver, and nonlinear distortion is easily generated by using a nonlinear predistortion algorithm or a nonlinear compensation algorithm.
  • the module or device is calibrated to increase the linearity of the output signal.
  • a channel may refer to a transmission channel, and specifically may include a modulation circuit for up-conversion (which may include: a mixer, a digital-to-analog converter, and a filter), and a portion for the RF front end. Used in devices such as amplifiers.
  • a channel may be a receiving channel, and may specifically include a device such as a low noise amplifier of a radio frequency front end portion, and a modulation circuit for down conversion (which may include a mixer, a digital to analog converter, and a filter, etc.) Device).
  • the embodiment of the present application provides a radio frequency transceiver with multiple channels, which can be used for application scenarios such as beamforming or carrier aggregation.
  • a radio frequency transceiver generally refers to a device that integrates functions of receiving and transmitting radio frequency signals. If the functions of receiving and transmitting are separated, the corresponding devices are respectively a radio frequency receiver and a radio frequency transmitter, and the technology provided by the present application
  • the solution is not limited to the application in the RF transceiver, and can also be used in the RF receiver or the RF transmitter.
  • the RF transceiver is taken as an example for illustration, and the application scope of the solution should not be limited.
  • factors that cause nonlinear distortion in different channels can be divided into two categories, a first distortion factor and a second distortion factor.
  • the first distortion factor refers to a factor common to each channel that causes nonlinear distortion.
  • the first distortion factor is nonlinear distortion caused by process variations in various channels in the RF transceiver.
  • This process variation refers to the phenomenon of variations in transistor and interconnect parameters caused by semiconductor manufacturing processes. It can be expressed by the Process Corner.
  • Process Corner the Process Corner
  • the electronics on each channel in the same RF transceiver are produced and operated at the same temperature or humidity, so the nonlinear distortion due to temperature (or humidity) fluctuations on each channel is the same. of.
  • the distortion factor such as batch fluctuation or temperature fluctuation in the above manufacturing process may be referred to as a first distortion factor
  • the first distortion factor is generally an important factor for generating nonlinear distortion in the radio frequency transceiver, due to the The nonlinear distortion caused by a distortion factor can be referred to as a first nonlinear distortion.
  • the second distortion factor refers to a characteristic that causes nonlinear distortion on each channel.
  • the second distortion factor is a process mismatch due to temperature gradient difference or randomness at different positions in each channel of the RF transceiver.
  • the resulting nonlinear distortion the second distortion factor causes a difference in nonlinear distortion generated at different locations within each channel.
  • a distortion factor that causes a difference in nonlinear distortion on each channel of the same chip may be referred to as a second distortion factor, and a nonlinear distortion caused by the second distortion factor may be referred to as a second nonlinearity. distortion.
  • a unified correction circuit (referred to as a main correction circuit in the present application) may be disposed in the radio frequency transceiver, and the first nonlinear distortion generated in each channel is uniformly corrected, and in each channel.
  • a slave correction circuit can be separately provided for correcting the second nonlinear distortion generated in the channel.
  • the present application introduces a master correction circuit in the radio frequency transceiver to superimpose the architecture of N discrete slave correction circuits.
  • the nonlinear distortion generated in each channel can be corrected using the main correction circuit and the correction signal generated corresponding to the superimposition from the correction circuit.
  • the first nonlinear distortion of each non-linear module is corrected by the main correction signal provided by the main correction circuit, and the first nonlinear distortion of the non-linear module is corrected by its corresponding slave correction circuit The signal is corrected.
  • the first nonlinear distortion is corrected by multiplexing one main correction circuit, and the second nonlinear distortion in each nonlinear module is corrected by the N correction circuits, which is used for nonlinearity compared to the correction circuit 40 of FIG.
  • the overall logic of the correction is simpler and the corresponding power consumption is lower, thereby reducing the power consumption of the correction while ensuring the accuracy of the correction of the prior art.
  • one or more devices that easily generate nonlinear distortion in each channel of the radio frequency transceiver are referred to as a non-linear module, that is, an object that needs to be corrected.
  • the functions of the nonlinear modules in each channel may be the same.
  • the nonlinear modules in each channel are power amplifiers (PAs) for power amplification.
  • PAs power amplifiers
  • the nonlinear modules in different channels may also be different.
  • the nonlinear module that generates nonlinear distortion in the first channel may be a PA, and the nonlinear distortion occurs in the second channel.
  • the non-linear module can be a variable gain amplifier (VGA).
  • each of the transmitting channels of the RF transmitter includes a modulation circuit and an amplifying circuit. Then, if there is nonlinear distortion in the above modulation circuit, the modulation circuit can be regarded as a nonlinearity to be corrected.
  • the module is corrected by the above-mentioned main correction circuit and a secondary correction architecture composed of the correction circuit; correspondingly, if there is nonlinear distortion in the above amplification circuit, the amplification circuit can be used as a nonlinear module to be corrected, through the above main The correction circuit and the second-order correction architecture composed of the correction circuit are corrected.
  • the whole of the modulation circuit and the amplification circuit may be corrected as a non-linear module, and the embodiment of the present application does not impose any limitation.
  • the above amplifying circuit may further include a device such as a VGA, a PA, a mixer, and a filter.
  • the primary correction circuit and the secondary correction architecture composed of the correction circuit may further correct one or more devices in the amplification circuit as a nonlinear module to be corrected, and correct the nonlinear distortion generated by the nonlinear module.
  • the embodiment of the present application does not impose any limitation on this.
  • each non-linear module may specifically include a nonlinear device and a power supply module.
  • the nonlinear device in the nonlinear module is specifically used to implement the signal processing function of the nonlinear module
  • the power supply module is specifically configured to provide a power supply signal for the nonlinear device, such as a bias voltage or a bias current.
  • the nonlinear device in the PA is used to amplify the received signal (in which case the nonlinear device is usually called PA), and the power supply module in the PA is used to Linear devices provide power.
  • each of the above-described N slave correction circuits 302 can be coupled from the correction circuit 302 to the nonlinear module 200 in the corresponding channel to provide a slave correction signal to the corresponding nonlinear module 200.
  • the main correction signal provided by the main correction circuit 301 is used to correct the first nonlinear distortion coexisting in the N non-linear modules 200; each of the slave correction signals provided from the correction circuit 302 is used for The second nonlinear distortion present in the corresponding nonlinear module 200 is corrected.
  • the primary correction circuit 301 can correct the first nonlinear distortion generated by the nonlinear module through a primary correction circuit, compared to each channel in the prior art.
  • the correction circuit should include the operation logic for correcting the first nonlinear distortion, which can greatly save the correction resources such as the power consumption and the occupied area consumed by the correction circuit in the entire RF transceiver.
  • the correction circuit can be used to correct each, which can improve the calibration accuracy and accuracy of the entire RF transmitter.
  • the radio frequency transmitter 300 includes N (N is a positive integer and N>1) transmission channels, each of which includes a modulation circuit 201, and a modulation circuit 201.
  • N is a positive integer and N>1
  • transmission channels each of which includes a modulation circuit 201, and a modulation circuit 201.
  • a coupled amplifier circuit 202 is included in each of the transmitting channels.
  • an antenna 203 coupled to the amplifying circuit 202 may also be included in each of the transmitting channels.
  • the modulation circuit 201 is configured to receive a baseband signal output by the baseband circuit and modulate the baseband signal into a radio frequency signal.
  • the power of the radio frequency signal outputted by the modulation circuit 201 at this time is small and cannot be converted into an electromagnetic wave by the antenna. Therefore, the modulation circuit 201 inputs the output radio frequency signal into the amplifying circuit 202, and the amplifying circuit 202 performs power amplification on the radio frequency signal. , get the amplified RF signal.
  • the amplified RF signal is input to the antenna 203 by the amplifying circuit 202, and the antenna 203 is transmitted to other communication devices in the form of electromagnetic waves.
  • the device in which the radio frequency transmitter 300 easily generates nonlinear distortion is mainly the amplifying circuit 202
  • the following is an example in which the amplifying circuit 202 in each transmitting channel is a non-linear module.
  • the principle of the secondary correction architecture provided.
  • the radio frequency transmitter 300 further includes a main correction circuit 301 and N slave correction circuits 302.
  • the N slave correction circuits 302 are respectively in one-to-one correspondence with the N transmission channels, and each of the slave correction circuits 302 is coupled to the amplification circuit 202 in the corresponding transmission channel, and the main correction circuit 301 is unified with the N transmission channels.
  • Each of the modulation circuits 201 is coupled.
  • the main correction circuit 301 is configured to uniformly correct the first nonlinear distortion coexisting in the N amplification circuits 202, and each of the slave correction circuits 302 is used to perform the second presence in the corresponding amplification circuit 202. Nonlinear distortion is corrected.
  • the main correcting circuit 301 can be used to uniformly correct the respective transmitting channels, so that it is not required to A main correction circuit 301 is provided in each of the transmission channels, thereby greatly reducing resources such as the area occupied by the entire RF transmitter 300 and the power consumption consumed.
  • the correction channel 302 can be used to correct the respective transmission channels, such that The correction accuracy and accuracy of the entire RF transmitter 300 can be improved.
  • the first nonlinear distortion described above is caused by a first distortion factor that is identical in N amplification circuits 202, such as temperature fluctuations or batch fluctuations.
  • the second nonlinear distortion described above is caused by a second distortion factor that may be different in the N amplification circuits 202, for example, temperature differences at different positions during operation of the circuit, and the like.
  • the RF transmitter 300 Since the nonlinear distortion generated in the RF transmitter 300 is mainly caused by the first distortion factor described above, the RF transmitter 300 has a higher correction requirement for the first nonlinear distortion caused by the first distortion factor, so that it is used for the correction.
  • the circuit structure in the main correction circuit 301 of a nonlinear distortion is generally complicated to design, and the power consumption and the occupied area consumed by the main correction circuit 301 are relatively large.
  • the N transmit channels can share a main correction circuit 301 for nonlinear distortion correction, thereby greatly reducing the power consumption and area occupied by the RF transmitter 300.
  • the above-described slave correction circuit 302 may be turned off, and the main correction circuit 301 uniformly corrects the nonlinear distortion generated by the N amplification circuits 202, thereby further The power consumption of the RF transmitter 300 is reduced.
  • main correction circuit 301 can be configured to be independently enabled or disabled
  • slave correction circuit 302 can also be configured to be independently enabled or disabled.
  • the main correction circuit 301 can be configured to acquire a first feedback signal from output signals of the N amplification circuits 202 (ie, N nonlinear modules).
  • a coupler may be respectively disposed at the output ends of the N amplifying circuits 202.
  • a part of the output signals may be input as a first feedback signal to the Main correction circuit 301.
  • the main correction circuit 301 can obtain the N firsts based on an APD (analog pre-distortion) or a DPD (digital pre-distortion) correction circuit pair.
  • the feedback signal is pre-distorted, predicting the distortion present in the output signal of the RF transmitter 300, and obtaining a pre-distortion signal capable of correcting the distortion.
  • the main correction circuit 301 can superimpose the predistortion signal as a main correction signal on the input ends of the N modulation circuits 201, respectively, so that the distortion signal actually present in the transmission signal outputted by each subsequent transmission channel can be compared with the predistortion described above.
  • the signals cancel each other out to obtain a higher linearity of the transmitted signal.
  • the operation principle of the correction circuit 302 is similar to the feedback adjustment principle in the above-described main correction circuit 301.
  • the input end of the correction circuit 302 is configured to obtain a second feedback signal from the output signal of the corresponding amplifying circuit 202 (ie, the nonlinear module); and further, the correcting circuit 302 can detect the amplifying circuit 202 based on the second feedback signal.
  • Linearity is the percentage of the maximum deviation ( ⁇ Ymax) and the full-scale output (Y) between the calibration curve and the fitted line when nonlinear correction is performed. It can also be called nonlinear error.
  • the above satisfying the preset linearity requirement may mean that the linearity of the nonlinear module is less than or equal to a certain preset threshold.
  • the preset threshold may be 0 or a value with a smaller value. When the preset threshold is equal to 0, it is explained that the correction circuit 302 is used to obtain the power supply control signal of the nonlinear module when the linear characteristic is the best.
  • the power supply module of the amplifying circuit 202 can generate a corresponding bias voltage or bias current based on the power supply control signal, and The bias voltage or bias current is input as a power supply signal to the non-linear device of the amplifying circuit 202, so that the amplifying circuit 202 can obtain a more linear output signal when operating at the bias voltage or bias current.
  • the above amplifying circuit 202 may be composed of a VGA 601, a PA 602, and a filter 603.
  • the input end of the VGA 601 is coupled to the output end of the corresponding modulation circuit 201
  • the output end of the VGA 601 is coupled to the input end of the PA 602
  • the output end of the PA 602 is coupled to the input end of the filter 603, and the output of the filter 603 is output.
  • the end is coupled to a corresponding antenna 203.
  • VGA 601 As a non-linear module as an example (the VGA 601 includes a power supply module and a nonlinear device that generates nonlinear distortion), on the basis of the amplifying circuit 202 shown in FIG. 7, the input from the correction circuit 302 can be used.
  • the terminal is coupled to the output of the VGA 601 and is coupled from the output of the correction circuit 302 to the power supply module of the VGA 601.
  • the correction circuit 302 can be a feedback loop circuit, and the feedback circuit can continuously adjust the offset of the VGA 601 based on the second feedback signal.
  • the voltage or bias current allows the VGA 601 to operate at different bias voltages or bias currents.
  • the feedback circuit can bias or bias the current at this time.
  • the VGA 601 operates with a bias voltage or bias current with minimal nonlinear distortion, thereby correcting the second nonlinear distortion generated by the VGA 601.
  • the signal sampled from the output signal of the VGA 601 can be input as a second feedback signal to the input end of the slave correction circuit 302. Further, the slave correction circuit 302 can pass the search algorithm based on the second feedback signal.
  • An iterative algorithm such as SPFA (shortest path faster algorithm) or Newton algorithm performs iteration, and the result of each iteration is the bias voltage or bias current of VGA 601. Then, when the iterative result converges, it indicates that the linearity of the output signal and the input signal of the VGA 601 is the highest. At this time, the current iteration result can be input to the nonlinear device of the VGA 601 as the power supply control signal of the VGA 601.
  • the VGA 601 is still used as a non-linear module.
  • the slave correction circuit 302 may include a feedback circuit 801 and a dummy circuit 802 of the above VGA 601.
  • the dummy circuit 802 can be used for Reproduce the nonlinear characteristics produced by VGA 601.
  • the dummy circuit 802 may be a circuit that is scaled down to a nonlinear device in the VGA 601. Therefore, the dummy circuit 802 can maximize the nonlinear characteristics of the VGA 601, and at the same time, due to the size of the dummy circuit 802. It can be done relatively small, so the power consumption is lower.
  • the non-linear module is another device in the radio frequency transmitter
  • the dummy circuit 802 can be a circuit that is scaled down by the corresponding non-linear device.
  • the input end of the dummy circuit 802 can be coupled to the input end of the VGA 601, and the output of the dummy circuit 802 and the feedback circuit 801 can be The input terminal is coupled to couple the output of the feedback circuit 801 to the power supply module of the VGA 601 described above.
  • the radio frequency signal input from the modulation circuit 201 to the VGA 601 is also input to the dummy circuit 802.
  • the nonlinear characteristic appearing in the nonlinear device in the VGA 601 also appears in the dummy circuit 802.
  • the dummy circuit 802 can input the output signal with nonlinear distortion as the second feedback signal to the feedback circuit 801, and the feedback circuit 801 continuously updates the bias voltage or bias current of the dummy circuit 802 based on the second feedback signal.
  • the feedback circuit 801 can input the bias voltage or the bias current at this time as a power supply control signal to the power supply module of the VGA 601, so that the VGA 601 is at the bias.
  • the linearity of the output signal of the VGA 601 and the input signal will also reach the optimal state with minimal nonlinear distortion.
  • the feedback circuit 801 since the feedback circuit 801 only needs to input the finally obtained optimal power supply control signal to the power supply module of the VGA 601 at one time, the whole process of the nonlinear correction of the feedback circuit 801 and the dummy circuit 802 does not change.
  • the bias voltage or bias current of the VGA 601 reduces the effects of the calibration process on the main path signal.
  • the primary correction circuit 301 and the secondary correction architecture composed of the correction circuit 302 can also be used to correct the modulation circuit or the PA or the like that generates nonlinear distortion in the RF transmitter 300.
  • the RF transmitter 300 can also be used.
  • the plurality of devices (for example, VGA and PA) as a whole are corrected by the primary correction circuit 301 and the secondary correction architecture composed of the correction circuit 302.
  • the embodiment of the present application does not impose any limitation.
  • the primary correction circuit may not be provided in the radio frequency transmitter, that is, the radio frequency transmitter includes only N (N is a positive integer greater than 1) transmission channels and N correction circuits.
  • each of the transmission channels includes a nonlinear module.
  • the N correction circuits may be respectively in one-to-one correspondence with the N transmission channels, wherein each of the correction circuits includes a feedback circuit and a dummy dummy circuit.
  • the dummy circuit can be used to reproduce the nonlinear characteristics of the corresponding nonlinear module.
  • the dummy circuit may be a circuit that scales down a nonlinear module (such as a VGA) in a corresponding transmission channel, so that nonlinear characteristics appearing in the nonlinear module may also appear in the dummy circuit.
  • an input end of the dummy circuit in each transmitting channel is coupled to an input end of the nonlinear module, and an output end of the dummy circuit is coupled to an input end of the feedback circuit, and an output end of the feedback circuit and the power supply of the nonlinear module Module coupling.
  • the dummy circuit can input the output signal with nonlinear distortion as a feedback signal to the feedback circuit, and the feedback circuit can continuously update the bias voltage or bias current of the power supply control signal of the dummy circuit based on the feedback signal until the dummy
  • the feedback circuit can input the bias voltage or the bias current at this time as a power supply control signal to the power supply module of the nonlinear module, so that The nonlinear device in the nonlinear module can work under the bias voltage or bias current. Then, the linearity of the output signal of the nonlinear module and the input signal will also reach the optimal state with the minimum nonlinear distortion.
  • the embodiment of the present application further provides a radio frequency receiver.
  • the radio frequency receiver 800 includes N (N>1) receiving channels, each of which includes a demodulation circuit 801, and An amplifying circuit 802 coupled to the demodulation circuit 801.
  • an antenna 803 coupled to the amplifying circuit 802 may also be included in each receiving channel.
  • the antenna 803 can filter and amplify the received signal through the amplifying circuit 802. Further, the demodulating circuit 801 demodulates the radio frequency signal with a higher frequency into a frequency. a lower intermediate frequency signal or a baseband signal, so that the subsequent baseband processor can read the valid information in the baseband signal from the baseband signal output by the demodulation circuit 801, or the intermediate frequency signal output by the down conversion circuit to the demodulation circuit 801
  • the baseband signal that the baseband processor can process is obtained after down-conversion sampling.
  • the demodulation circuit 801 in each transmission channel is hereinafter required to be corrected.
  • the linear module illustrates the principle of the secondary correction architecture provided by the present application.
  • the radio frequency receiver 800 further includes a main correction circuit 901 and N slave correction circuits 902.
  • N slave correction circuits 902 are respectively in one-to-one correspondence with N reception channels, and each slave correction circuit 902 is coupled to a demodulation circuit 801 in a corresponding reception channel, and the main correction circuit 901 is also associated with each of the N reception channels.
  • Demodulation circuits 801 are coupled respectively.
  • each slave correction circuit 902 is coupled to a demodulation circuit 801 in a corresponding receive channel via an adder 903, and the master correction circuit 901 also passes through the adder 903 and each of the N receive channels.
  • Demodulation circuits 801 are coupled separately.
  • the main correction circuit 901 in the radio frequency receiver 800 is used to uniformly correct the first nonlinear distortion coexisting in the N demodulation circuits 801 (ie, N non-linear modules).
  • Each of the slave correction circuits 902 only needs to correct the second nonlinear distortion present in the demodulation circuit 802 coupled thereto, wherein the first nonlinear distortion and the second nonlinear distortion can be referred to the expression in the foregoing embodiment, and Let me repeat.
  • the main correction circuit 901 can be used to uniformly correct the respective reception channels, so that it is not necessary to provide a main correction circuit in each of the reception channels. 801, thereby greatly reducing the resources consumed when correcting the entire RF receiver 800.
  • the transmission channel can use the correction circuit 902 to correct the respective demodulation circuit 801, which can improve the calibration accuracy and accuracy of the entire RF receiver 800. degree.
  • a receiving channel is taken as an example.
  • the amplifying circuit 802 may specifically include a filter 1001 and an LNA 1002.
  • the demodulating circuit 801 may specifically include a mixer 1003, a local oscillator 1004, and analog to digital conversion. (analog to digital converter, ADC) 1005 and so on.
  • ADC analog to digital converter
  • the input of the filter 1001 is coupled to the antenna 803, the output of the filter 1001 is coupled to the input of the LNA 1002, the output of the LNA 1002 is coupled to the first input of the mixer 1003, and the first of the mixer 1003
  • the two inputs are coupled to the local oscillator 1004, and the output of the mixer 1003 is coupled to the ADC 1005.
  • multiple receiving channels can multiplex the same local oscillator 1004.
  • multiple receiving channels can also be used.
  • the present embodiment does not impose any limitation on the device other than the local oscillator 1004.
  • the RF signal received by the antenna 803 is filtered and amplified by the filter 1001 and the LNA 1002, and then input to the mixer 1003 for down-conversion together with the LO (local oscillator) signal generated by the local oscillator 1004, thereby
  • the RF signal is converted into an intermediate frequency (IF) signal, and the intermediate frequency signal is subjected to secondary down-conversion to obtain a baseband signal, and the baseband signal is further converted into a baseband signal after being input to the ADC 1005; of course, if the RF receiver adopts a zero-IF architecture
  • the mixer 1003 can directly down-convert the radio frequency signal into a baseband signal.
  • the low-intermediate frequency, super-heterodyne, and the like can also be applied to the radio frequency receiver of the embodiment. .
  • the above-described mixer 1003 is prone to generate even harmonics during operation, causing the radio frequency receiver 800 to generate nonlinear distortion.
  • the mixer 1003 can be used as a nonlinear module (the mixer 1003 includes a power supply module and a nonlinear device that generates nonlinear distortion), and the mixer 1003 is generated by adjusting the bias voltage of the power supply module in the mixer 1003. The nonlinear distortion is corrected.
  • the bias voltage of each of the mixers 1003 can be commonly adjusted by the main correction circuit 901 and the slave correction circuit 902 on the corresponding receiving channel.
  • the bias voltage of the mixer 1003 can be provided by the output of the adder 903, and the first input of the adder 903 is the output of the main correction circuit 901, and the second input of the adder 903 is
  • the mixer 1003 is coupled to the output of the slave correction circuit 902.
  • the bias voltage of the mixer 1003 of the first receiving channel needs to be adjusted to 0.91 V to remove the nonlinear distortion of the channel, and the bias of the mixer 1003 of the second receiving channel is required.
  • the voltage is adjusted to 0.88V to remove the nonlinear distortion of the channel.
  • the bias voltage of 0.9V is caused by the first nonlinear distortion common to each receiving channel, and the excess 0.01V in the first receiving channel and the reduced 0.02V bias voltage in the second receiving channel are Due to the second nonlinear distortion that each of the receiving channels has.
  • a first voltage of 0.9V can be uniformly outputted by the main correction circuit 901, the first digit after the decimal point of the bias voltage is corrected, and then a second voltage of 0.1V is outputted from the correction circuit 902 of the first receiving channel, and corrected.
  • the second digit after the decimal point of the bias voltage is added by the adder 903, and the corrected bias can be output to the mixer 1003 of the first receiving channel. Set the voltage to 0.91V.
  • a second voltage of -0.2 V can be output from the correction circuit 902 of the second receiving channel, such that the first voltage of 0.9 V output by the main correction circuit 901 and the second voltage of -0.2 V output from the correction circuit 902 After the voltages are added by the adder 903, the corrected bias voltage of 0.88 V can be output to the mixer 1003 of the second receiving channel.
  • the respective correction channels can be uniformly corrected by the main correction circuit 901 using a large dynamic coarse adjustment, and for the N mixers 1003.
  • the second nonlinear distortion there is a difference in the second nonlinear distortion, and each of the receiving channels can be separately corrected by the local slave correction circuit 902 using a small dynamic fine adjustment.
  • the radio frequency receiver 800 does not require high correction accuracy of the received signal, for example, if the bias voltage of the mixer 1003 in the first receiving channel and the second receiving channel is required to be accurate to one decimal place
  • the bias voltages of the mixer 1003 in the first receiving channel and the second receiving channel are both 0.9V.
  • the N slave correction circuits 902 can be turned off, and the main correction circuit 901 can be used to correct the respective receiving channels. Further reducing the power consumption of the radio frequency receiver 800.
  • nonlinear distortion generated by a nonlinear module for example, the above-described mixer 1003 in each receiving channel may be simulated to obtain an entire radio frequency.
  • the bias voltage of the mixer 1003 has a distortion ranging between 0.8V and 1.2V.
  • the ADC 1005 in each receiving channel converts the fundamental frequency (or intermediate frequency) signal output by the mixer 1003 into a baseband signal, and then determines whether the mixer 1003 generates nonlinear distortion. . If nonlinear distortion is generated, the ADC 1005 can instruct the primary correction circuit 901 to perform a nonlinear correction. At this time, the main correction circuit 901 can continuously adjust the bias voltage of the mixer 1003 in each receiving channel between the above-mentioned distortion ranges of 0.8V to 1.2V until the linearity of the mixer 1003 in each receiving channel reaches the pre-determination. Set the requirements (for example, the linearity is less than 1).
  • the linearity of the mixer 1003 in each receiving channel reaches a preset requirement, it is indicated that the first nonlinear distortion generated by the mixer 1003 in each receiving channel is uniformly corrected by the main correction circuit 901.
  • the second nonlinear distortion having the difference in the mixer 1003 in the different receiving channels can be continuously adjusted by the bias voltage output from the correction circuit 902 in the respective receiving channels on the main correction circuit 901.
  • the bias voltage of the frequency converter 1003 is up to the optimum state of the linearity of the mixer 1003 in each of the receiving channels (for example, the linearity is less than 0.2).
  • the above-mentioned main correction circuit may be a digital to analog converter (DAC), such as a first DAC, and the above-mentioned slave correction circuit may also be a DAC, such as a second DAC. This does not impose any restrictions.
  • DAC digital to analog converter
  • the primary correction circuit 301 and the secondary correction architecture composed of the correction circuit 302 can also be used to correct the amplification circuit or the LNA and the like that generate nonlinear distortion in the RF receiver 800.
  • the RF receiver 800 can also be used.
  • the plurality of devices in the present invention are calibrated by the primary correction circuit 301 and the secondary correction architecture composed of the correction circuit 302. The embodiment of the present application does not impose any limitation on this.
  • the radio frequency receiver 800 shown in FIG. 4 to FIG. 12 above may multiplex related devices in the radio frequency transmitter 300 shown in FIG. 3 to FIG. 8 above, for example, an antenna, a filter, etc., that is, The radio frequency receiver 800 and the radio frequency transmitter 300 described above share the same antenna and filter.
  • the embodiment of the present application further provides a radio frequency transceiver chip, specifically, the radio frequency transmitter 300 shown in the above-mentioned FIG. 3 to FIG. 8 and the radio frequency receiver 800 shown in FIG. 4 to FIG. 12 described above.
  • the embodiment of the present application further provides a communication device including the foregoing radio frequency transceiver chip, which can be applied to any device that needs to transmit and receive radio frequency signals, such as a mobile phone, a tablet computer, a wearable device, an in-vehicle device, and augmented reality (augmented).
  • a mobile phone such as a mobile phone, a tablet computer, a wearable device, an in-vehicle device, and augmented reality (augmented).
  • Reality, AR) ⁇ virtual reality (VR) devices laptops, ultra-mobile personal computers (UMPCs), netbooks, personal digital assistants (PDAs), base stations, switches, routers Etc.
  • UMPCs ultra-mobile personal computers
  • PDAs personal digital assistants
  • base stations switches, routers Etc.
  • the above communication device specifically includes a baseband processor and a radio frequency transmitter 300 shown in FIGS. 4-8, which is coupled to a baseband processor.
  • the radio frequency transmitter 300 is configured to convert the baseband signal output by the baseband processor into a radio frequency signal, and output the radio frequency signal through the antenna.
  • the radio frequency transmitter 300 includes N transmit channels, each of which includes a modulation circuit 201 and an amplifying circuit 202 coupled to the modulation circuit 201. Then, the input of the modulation circuit 201 in each of the transmit channels can be used as the input of the RF transmitter 300, and the input of the RF transmitter 300 can be coupled to the output of the baseband processor. Also, the output of the amplifying circuit 202 in each of the transmitting channels can be used as the output of the radio frequency transmitter 300, and the output of the radio frequency transmitter 300 can be coupled to the input of the antenna.
  • the above communication device specifically includes a baseband processor and a radio frequency receiver 800 shown in FIGS. 10-12, which is coupled to a baseband processor.
  • the radio frequency receiver 800 is configured to convert the radio frequency signal received by the antenna into a baseband signal, and input the baseband signal into the baseband processor.
  • the radio frequency receiver 800 includes N receiving channels, each of which includes a modulation circuit 201 and an amplifying circuit 202 coupled to the modulation circuit 201. Then, the input of the amplifying circuit 202 in each receiving channel can be used as the input of the radio frequency receiver 800, and the input of the radio frequency receiver 800 can be coupled to the output of the baseband antenna. Also, the output of modulation circuit 201 in each receive channel can be used as the output of radio frequency receiver 800, and the output of radio frequency receiver 800 can be coupled to the input of the baseband processor.
  • the above terminal and the like include hardware structures and/or software modules corresponding to each function.
  • the embodiments of the present application can be implemented in a combination of hardware or hardware and computer software in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the embodiments of the present application.
  • the computer program product includes one or more computer instructions.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)).

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Transmitters (AREA)
  • Amplifiers (AREA)

Abstract

本申请的实施例提供一种射频接收机、射频发射机及通信设备，涉及电路技术领域，可降低校正非线性失真所耗费的资源，提高射频收发机的工作性能。该射频发射机包括N个发射通道，每个发射通道中分别包括一个非线性模块；主校正电路，分别与N个发射通道对应的N个非线性模块相耦合，用于为N个非线性模块提供主校正信号；以及N个从校正电路，这N个从校正电路分别耦合至N个非线性模块，其中，每个从校正电路用于为与之耦合的非线性模块提供从校正信号。其中，上述主校正信号和第一从校正电路(即N个从校正电路中的任一个)提供的从校正信号可用于校正第一非线性模块(即与第一从校正电路耦合的非线性模块)的非线性失真。

Description

一种射频接收机、射频发射机及通信设备 技术领域
本申请实施例涉及电路技术领域，尤其涉及一种射频接收机、射频发射机及通信设备。
背景技术
通信设备(例如基站等)可通过天线将频率较高的射频信号辐射为电磁波，进而以电磁波为介质与其他通信设备进行无线通信。示例性的，基站内一般包括基带(baseband，BB)电路和射频(radio frequency，RF)收发机。其中，射频收发机又可以包括射频发射机和射频接收机，在基站发射信号时，基带电路用于发出没有经过调制的基带信号，而射频收发机用于将基带信号调制为频率较高、功率较大的射频信号，再通过天线将射频信号发送给其他通信设备；基站接收信号的过程与发射过程相反，此处不再赘述。
随着多输入多输出(multiple input multiple output，MIMO)技术的发展，射频发射机和射频接收机的结构越来越复杂，所占的面积和功耗也大幅增加。
图1所示为现有技术中的一种多通道的射频发射机的结构示意图。在每一个发射通道中，调制解调电路10输出的射频信号被输入放大电路20，放大电路20将放大后的射频信号输入天线30，并通过天线30发射给其他设备通信。另外，该射频发射机中的每一个发射通道还包括校正电路40，用于对放大电路20产生的非线性失真进行校正，以提高射频发射机的偶次或者奇次线性度，其中，各个发射通道的校正电路40相互独立。
随着通信技术的发展，通信设备支持的频段越来越多，包括载波聚合技术，波束成形技术得到广泛应用，使得射频发射机中的通道数量也越来越多；而当射频发射机中的通道数量增加时，射频发射机中校正电路40的个数也会成比例增加，使得校正非线性失真时消耗的功耗增加。因此，亟需提供一种新的非线性校正方案，以降低功耗。
发明内容
本申请的实施例提供的射频接收机、射频发射机及通信设备，引入了一个主校正电路叠加N个分立式的从校正电路的架构，可使得多个通道共用主校正电路校正射频接收机或射频发射机中非线性失真，从而降低校正所耗费的功耗。
为达到上述目的，本申请的实施例采用如下技术方案：
第一方面，本申请的实施例提供一种射频发射机，包括：N个(N为大于1的正整数)发射通道，每个发射通道中分别包括一个非线性模块；主校正电路，分别与N个发射通道对应的N个非线性模块相耦合，用于为N个非线性模块提供主校正信号；以及N个从校正电路，这N个从校正电路分别耦合至N个非线性模块，每个从校正电路用于为与之耦合的非线性模块提供从校正信号；其中，上述主校正信号和第一从校正电路(即N个从校正电路中的任一个)提供的从校正信号可用于校正第一非线性模块(即与第一从校正电路耦合的非线性模块)的非线性失真，即每个非线性模块产生的非线性失真可被上述主校正信号以及与该非线性模块对应的从校正信号校正。
也就是说，现有技术中，每个非线性模块的非线性失真可以分为两部分，非线性失真(A)和非线性失真(B)，相应的，图1所示的每一个校正电路40中，否需要包括针对这两部分非线性失真进行校正所需的运算逻辑。而本申请中引入了一个主校正电路叠加N个分立式的从校正电路的架构，这样每个通道中产生的非线性失真都可使用主校正电路和对应从校正电路叠加后产生的校正信号被校正，其中，每个非线性模块的非线性失真(A)被主校正电路提供的主校正信号所校正，而该非线性模块的非线性失真(B)则被与它对应的从校正电路提供的从校正信号所校正。因此，无需在每个通道中设置一个能够完全校正该通道中非线性模块的非线性失真的校正电路。总之，通过复用一个主校正电路校正非线性失真(A)，并配合N个从校正电路校正各个非线性模块中的非线性失真(B)，相比于图1的校正电路40，用于非线性校正的总体运算逻辑更为简单，相应的功耗也更低，从而在保证与现有技术的校正精度相当的同时降低校正所耗费的功耗。
在一种可能的设计方案中，每个非线性模块包括非线性器件和供电模块，其中，供电模块用于根据校正信号对与该供电模块对应的非线性模块的供电进行调节，该校正信号包括：该主校正信号以及提供给该供电模块的从校正信号。
在一种可能的设计方案中，上述主校正电路用于：分别从该N个非线性模块中每个非线性模块的输出信号中获取第一反馈信号；根据获取到的N个第一反馈信号生成预失真信号；以及将该预失真信号(即主校正信号)分别输入至该N个非线性模块各自对应的供电模块。这样，后续每个发射通道中实际产生的失真信号可与上述预失真信号部分或全部抵消，得到线性度更高的输出信号
在一种可能的设计方案中，上述N个从校正电路中的每个从校正电路用于：从与该从校正电路对应的非线性模块输出的信号中获取第二反馈信号；根据该第二反馈信号获取该非线性模块在线性度小于或等于预设阈值时的供电控制信号；将该供电控制信号(即从校正信号)输入至与该非线性模块对应的供电模块。
在一种可能的设计方案中，上述主校正信号用于校准该N个非线性模块中共同存在的第一非线性失真，每个从校正电路提供的从校正信号用于校正对应的非线性模块中存在的第二非线性失真，该N个非线性模块各自的第二非线性失真之间存在差异。
本申请中，将各个非线性模块的非线性失真分为共性部分以及差异性部分，其中，共性部分称为第一非线性失真，差异性部分称为非线性失真，如图1所示的现有技术中，每个发射通道对应的校正电路40需要完成对这两类非线性失真的校正，因此，校正电路的设计较为复杂，对于功耗、面积的小号较大。而在本申请第一方面提供的射频接收机中，所有发射通道可通过一个主校正电路校正非线性模块产生的第一非线性失真，相比现有技术中每个校正电路40都要包括校正第一非线性失真的运算逻辑而言，可以大大节省校正电路在整个射频收发机中消耗的功耗、占用的面积等校正资源。同时，每个从校正电路还可以校正其非线性模块产生的非线性失真，因而在节省校正资源的同时还可以保证对非线性失真校正的准确性。
在一种可能的设计方案中，上述第一非线性失真是由于共性的第一失真因素造成的，上述第二非线性失真是由于差异性的第二失真因素造成的。也就是说，对于N个发射通道中由第一失真因素导致的共同存在的第一非线性失真，可使用主校正电路统 一对各个发射通道进行校正，这样不需要在每个发射通道中都设置一个主校正电路，从而大大降低对整个射频发射机校正时占用的面积以及消耗的功耗等资源。而对于N个发射通道中存在差异的第二失真因素引起的第二非线性失真，可使用从校正电路对各自的发射通道进行校正，这样可以提高整个射频发射机的校正精度和准确度。
在一种可能的设计方案中，上述N个从校正电路中的每个从校正电路包括：反馈电路和dummy电路，该dummy电路用于复现对应的非线性模块的非线性特性；该dummy电路的输入端与该非线性模块的输入端耦合，该dummy电路的输出端与该反馈电路的输入端耦合，该反馈电路的输出端与该非线性模块中供电模块的输入端耦合；其中，该反馈电路用于获取该dummy电路在线性度小于或等于预设阈值时的偏置电压或偏置电流，该偏置电压或偏置电流为从校正信号。
这样一来，向非线性模块输入的射频信号也会同样输入至dummy电路中，那么，非线性模块出现的非线性特征也会出现在dummy电路中。这样，dummy电路可以将输出的带有非线性失真的信号作为第二反馈信号输入至反馈电路，由反馈电路不断更新dummy电路的偏置电压或偏置电流，直至dummy电路的输出信号与输入信号的线性度较好时，反馈电路可将此时的偏置电压或偏置电流作为从校正信号输入给非线性模块的供电模块，使得非线性模块的非线性器件可以在该偏置电压或偏置电流下工作，那么，非线性模块的输出信号与输入信号的线性度也将达到非线性失真较小的优化状态。
同时，由于反馈电路只需将最终得到的供电控制信号一次性输入给非线性模块，而在上述反馈电路与dummy电路进行非线性校正的整个过程中，不会影响非线性模块的工作状态，从而可降低校正过程对主通路信号的影响。
在一种可能的设计方案中，上述从校正电路可使用模拟预失真APD的方式生成从校正信号，主校正电路可使用APD校正电路或数字预失真DPD的方式生成主校正信号。
在一种可能的设计方案中，上述主校正电路被配置为独立地启用或者禁用，该从校正电路被配置为独立地启用或者禁用。
在一种可能的设计方案中，上述射频发射机用于进行波束成形或载波聚合。
示例性的，上述非线性模块中的非线性器件可以为功率放大器PA，混频器mixer或者可变增益放大器VGA中的至少一个。
第二方面，本申请的实施例提供一种射频接收机，包括：N(N为大于1的正整数)个接收通道，每个接收通道中分别包括一个非线性模块；主校正电路，分别与N个接收通道对应的N个非线性模块相耦合，用于为N个非线性模块提供主校正信号；以及N个从校正电路，这N个从校正电路分别与该N个非线性模块耦合，每个从校正电路用于为与之耦合的非线性模块提供从校正信号。其中，上述主校正信号和第一从校正电路(即N个从校正电路中的任一个)提供的从校正信号可用于校正第一非线性模块(即与第一从校正电路耦合的非线性模块)的非线性失真，即每个非线性模块产生的非线性失真被所述主校正信号以及与该非线性模块对应的从校正信号校正。
在一种可能的设计方案中，上述每个非线性模块还包括非线性器件和供电模块，其中，供电模块用于根据校正信号对与该供电模块对应的非线性模块的供电进行调节， 该校正信号包括：该主校正信号以及提供给该供电模块的从校正信号。
示例性的，上述非线性模块中的非线性器件可以为低噪声放大器，混频器或者可变增益放大器中的至少一个。
在一种可能的设计方案中，每个非线性模块均具有一个M位的偏置电压，该N个接收通道对应的N个偏置电压之间存在差异，M为大于1的正整数；其中，该主校正电路用于校正该N个偏置电压的前X位，该N个从校正电路中的每个从校正电路用于校正与其耦合的非线性模块的偏置电压的后Y位，X+Y＝M，X和Y均为正整数。
在一种可能的设计方案中，上述该N个从校正电路中的每个从校正电路均通过一个加法器与对应接收通道中的非线性模块耦合，该主校正电路也通过该加法器与该N个接收通道中的每个非线性模块分别耦合。
在一种可能的设计方案中，上述主校正电路为第一数字模拟转换器DAC，上述N个从校正电路中的每个从校正电路为第二DAC。
在一种可能的设计方案中，上述主校正信号用于校准该N个非线性模块中共同存在的第一非线性失真，每个从校正电路提供的从校正信号用于校正对应的非线性模块中存在的第二非线性失真，该N个非线性模块各自的第二非线性失真之间存在差异。
其中，第一非线性失真是由于共性的第一失真因素造成的，该第二非线性失真是由于差异性的第二失真因素造成的。
在一种可能的设计方案中，上述射频接收机用于进行波束成形或载波聚合。
第三方面，本申请的实施例提供一种射频发射机，包括：N个发射通道，每个发射通道中分别包括一个非线性模块，每个非线性模块包括供电模块和非线性器件，N为大于1的正整数；N个校正电路，该N个校正电路分别耦合至N个非线性模块，其中，每个校正电路中包括反馈电路和虚拟dummy电路，该dummy电路用于复现对应的非线性模块的非线性特性；该dummy电路的输入端与该非线性模块的输入端耦合，该dummy电路的输出端与该反馈电路的输入端耦合，该反馈电路的输出端与该非线性模块中供电模块的输入端耦合；其中，该反馈电路用于根据该dummy电路的偏置电压或偏置电流生成校正信号，以校正该非线性模块产生的非线性失真。
在一种可能的设计方案中，上述反馈电路具体用于：检测该dummy电路在线性度小于或等于预设阈值时的偏置电压或偏置电流，并使用该偏置电压或偏置电流校正该非线性模块产生的非线性失真。
第四方面，本申请的实施例提供一种射频收发芯片，包括上述任一项射频发射机和射频发射机。
第五方面，本申请实施例提供一种通信设备，包括上述任一项射频发射机和基带处理器，该射频发射机与基带处理器耦合；其中，射频发射机用于将基带处理器输出的基带信号转换为发射信号，并将该发射信号通过天线输出。
第六方面，本申请实施例提供一种通信设备，包括上述任一项射频接收机以及基带处理器，该射频接收机与基带处理器耦合；其中，射频接收机用于将天线接收到的接收信号转换为基带信号，并将该基带信号输入基带处理器。
本申请的实施例中，上述射频发射机、射频接收机以及射频收发机中各部件的名字对电路本身不构成限定，在实际实现中，这些部件可以以其他名称出现。只要各个 部件的功能和本申请的实施例类似，即属于本申请权利要求及其等同技术的范围之内。
另外，第二方面至第六方面中任一种设计方案所带来的技术效果可参见上述第一方面中不同设计方案所带来的技术效果，此处不再赘述。
附图说明
图1为现有技术中射频发射机的结构示意图；
图2为本申请实施例提供的一种射频收发机的结构示意图；
图3为本申请实施例提供的一种射频发射机的结构示意图一；
图4为本申请实施例提供的一种射频发射机的结构示意图二；
图5为本申请实施例提供的一种射频发射机的结构示意图三；
图6为本申请实施例提供的一种射频发射机的结构示意图四；
图7为本申请实施例提供的一种射频发射机的结构示意图五；
图8为本申请实施例提供的一种射频发射机的结构示意图六；
图9为本申请实施例提供的一种射频接收机的结构示意图一；
图10为本申请实施例提供的一种射频接收机的结构示意图二；
图11为本申请实施例提供的一种射频接收机的结构示意图三；
图12为本申请实施例提供的一种射频接收机的结构示意图四。
具体实施方式
以下，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请实施例的描述中，除非另有说明，“多个”的含义是两个或两个以上。
非线性失真(nonlinear distortion)也可称为波形失真、非线性畸变等，其表现为射频收发机的输出信号与输入信号不成线性关系，使输出信号中产生了新的谐波(harmonic wave)成分。
示例性的，在射频收发机中，非线性失真可进一步包括由偶次谐波引起的偶次失真以及由奇次谐波引起的奇次失真。其中，额定频率为基波频率偶数倍的谐波被称为偶次谐波，相应的，额定频率为基波频率奇数倍的谐波被称为奇次谐波，其中偶次谐波一般出现在射频接收机的解调电路中。
为了避免射频收发机中出现非线性失真现象，通常可以在射频收发机的发送电路或接收电路中额外设置一个校正电路，利用非线性预失真算法或非线性补偿算法等，对容易产生非线性失真的模块或器件进行校正，提高输出信号的线性度。
但是，对于一个集成了多个通道的射频收发机而言，如果在每一个通道上都设置一个校正电路，则校正整个射频收发机时消耗的功耗、占用的面积以及接口等资源都将随通道个数成比例的增长，降低整个射频收发机的信号收发效率。
需要说明的是，本申请实施例中涉及的通道这一概念可以是接收通道，也可以是发送通道。例如，在射频发射机中，通道可以是指发射通道，具体可以包括用于上转换的调制电路(可以包括：混频器，数模转换器和滤波器等器件)，以及用于射频前端部分用于放大器等器件。在射频接收机中，通道可以是指接收通道，具体可以包括射频前端部分的低噪声放大器等器件，以及用于下转换的调制电路(可以包括：混频 器，数模转换器和滤波器等器件)。
本申请实施例提供一种具有多个通道的射频收发机，该射频收发机可用于进行波束成形或载波聚合等应用场景。应当知道，射频收发机通常是指集成了接收和发射射频信号的功能的装置，如果接收和发射的功能分离，那么相应的装置就分别是射频接收机和射频发射机，而本申请提供的技术方案，并不局限于应用于射频收发机中，也可以用在射频接收机或者射频发射机中，这里只是以射频收发机为例进行说明，不应对本方案的应用范围构成限定。
具体的，导致不同通道中产生非线性失真的因素划可以分为两类，即第一失真因素和第二失真因素。
其中，第一失真因素是指每个通道上共有的造成非线性失真的因素。一般而言，第一失真因素是射频收发机内各个通道中由于工艺变化导致的非线性失真，该工艺变化是指半导体制造工艺中造成晶体管和互连线参数中发生偏差的现象，工艺变化具体可通过工艺角(Process Corner)表示。例如，由于同一射频收发机中的晶圆都来自于同一批次，因此，如果这些晶圆在制作过程中工艺及设备性能产生波动，则后续在射频收发机中每个通道上由该原因产生的非线性失真应该是相同的。又例如，同一射频收发机中每个通道上的电子器件都是在相同温度或湿度条件下生产和工作的，因此，每个通道上由于温度(或湿度)的波动导致的非线性失真也是相同的。在本申请实施例中，可以将上述制作过程中的批次波动或温度波动等失真因素称为第一失真因素，第一失真因素一般是射频收发机中产生非线性失真的重要因素，由于第一失真因素而导致的非线性失真可称为第一非线性失真。
第二失真因素是指每个通道上特有的造成非线性失真的因素，一般而言，第二失真因素是射频收发机内各个通道中由于不同位置处的温度梯度差异或随机性的工艺失配导致的非线性失真，第二失真因素使得各个通道内中不同位置上产生的非线性失真存在差异。那么，在本申请实施例中，可以将导致同一芯片各个通道上非线性失真存在差异的失真因素称为第二失真因素，由于第二失真因素而导致的非线性失真可称为第二非线性失真。
那么，本申请实施例中可以在射频收发机中设置统一的校正电路(本申请中称为主校正电路)，对各个通道中产生的第一非线性失真统一进行校正，而在每个通道中可以分别设置从校正电路，用于对该通道中产生的第二非线性失真分别进行校正。
也就是说，本申请在射频收发机中引入了一个主校正电路叠加N个分立式的从校正电路的架构。这样每个通道中产生的非线性失真都可使用主校正电路和对应从校正电路叠加后产生的校正信号被校正。其中，每个非线性模块的第一非线性失真可被主校正电路提供的主校正信号所校正，而该非线性模块的第一非线性失真则被与它对应的从校正电路提供的从校正信号所校正。
这样一来，无需在每个通道中设置一个能够完全校正该通道中非线性模块的非线性失真的校正电路。因此，通过复用一个主校正电路校正第一非线性失真，并配合N个从校正电路校正各个非线性模块中的第二非线性失真，相比于图1的校正电路40，用于非线性校正的总体运算逻辑更为简单，相应的功耗也更低，从而在保证与现有技术的校正精度相当的同时降低校正所耗费的功耗。
具体的，本申请实施例中将射频收发机中各通道内容易产生非线性失真的一个或多个器件称为非线性模块，即需要被校正的对象。需要说明的是，每个通道内的非线性模块的功能可以是相同的，例如，每个通道内的非线性模块均为用于进行功率放大的功率放大器(power amplifier，PA)。当然，在一些实施方式中，不同通道中的非线性模块也可以是具有差异性的，例如，第一通道中产生非线性失真的非线性模块可以是PA，而第二通道中产生非线性失真的非线性模块可以是可变增益放大器(variable gain amplifier，VGA)。
以射频发射机为例，射频发射机的每个发射通道中均包括调制电路和放大电路等器件，那么，如果上述调制电路中存在非线性失真，则可以将调制电路作为需要被校正的非线性模块，通过上述主校正电路和从校正电路组成的二级校正架构进行校正；相应的，如果上述放大电路中存在非线性失真，则可以将放大电路作为需要被校正的非线性模块，通过上述主校正电路和从校正电路组成的二级校正架构进行校正，当然，也可以将上述调制电路和放大电路组成的整体作为非线性模块进行校正，本申请实施例对此不做任何限制。
进一步地，上述放大电路中又可进一步包括VGA、PA、混频器以及滤波器等器件。那么，上述主校正电路和从校正电路组成的二级校正架构还可以将放大电路中的一个或多个器件作为需要被校正的非线性模块，对该非线性模块产生的非线性失真进行校正，本申请实施例对此不做任何限制。
另外，无论将射频收发机中的哪个或哪几个器件作为上述非线性模块，每个非线性模块中具体可包括非线性器件和供电模块。其中，非线性模块中的非线性器件具体用于实现该非线性模块的信号处理功能，供电模块具体用于为非线性器件提供供电信号，例如偏置电压或偏置电流等。示例性的，当PA作为非线性模块时，PA中的非线性器件用于对接收到的信号进行放大(这时非线性器件通常就叫做PA)，而PA中的供电模块用于向其非线性器件提供供电。
示例性的，如图2所示，以射频收发机中包括N个通道为例，当射频收发机中的非线性模块确定后，可以将上述主校正电路301分别与N个通道中的N个非线性模块200相耦合，由主校正电路301向N个非线性模块200提供主校正信号。并且，可将上述N个从校正电路302中的每个从校正电路302与对应通道中的非线性模块200相耦合，以便向对与之对应的非线性模块200提供从校正信号。
具体的，上述主校正电路301提供的主校正信号用于对N个非线性模块200中共同存在的第一非线性失真进行校正；每个从校正电路302提供的从校正信号用于对与之对应的非线性模块200中存在的第二非线性失真进行校正。
那么，在这种主校正电路301加N个从校正电路302的架构中，所有发射通道可通过一个主校正电路校正非线性模块产生的第一非线性失真，相比现有技术中每个通道的校正电路都要包括校正第一非线性失真的运算逻辑而言，可以大大节省校正电路在整个射频收发机中消耗的功耗、占用的面积等校正资源。同时，对于不同通道中的第二非线性失真，可使用从校正电路对各自进行校正，这样可以提高整个射频发射机的校正精度和准确度。
以下，将结合附图详细阐述本申请实施例提供的射频收发机。
以射频发射机为例，如图3所示，该射频发射机300包括N(N为正整数且N＞1)个发射通道，每个发射通道中均包括调制电路201，以及与调制电路201耦合的放大电路202。可选的，每个发射通道中还可以包括与放大电路202耦合的天线203。
其中，调制电路201用于接收基带电路输出的基带信号，并将该基带信号调制为射频信号。但调制电路201此时输出的射频信号的功率较小，无法被天线转换为电磁波，因此，调制电路201将输出的射频信号输入至放大电路202中，由放大电路202对该射频信号进行功率放大，得到放大后的射频信号。最终，由放大电路202将放大后的射频信号输入至天线203，天线203以电磁波的形式发送给其他通信设备。
基于图3所示的射频发射机300，由于射频发射机300容易产生非线性失真的器件主要是放大电路202，因此，以下以每个发射通道中的放大电路202为非线性模块举例说明本申请提供的二级校正架构原理。
如图4所示，上述射频发射机300中还包括主校正电路301和N个从校正电路302。该N个从校正电路302分别与N个发射通道一一对应，并且，每个从校正电路302均与对应的发射通道中的放大电路202相耦合，而主校正电路301统一与N个发射通道中的每个调制电路201均耦合。
其中，主校正电路301用于对上述N个放大电路202中共同存在的第一非线性失真进行统一校正，而每个从校正电路302用于对与之对应的放大电路202中存在的第二非线性失真进行校正。
也就是说，对于N个放大电路202中共同存在的第一非线性失真，例如，由温度波动导致的非线性失真，可使用主校正电路301统一对各个发射通道进行校正，这样不需要在每个发射通道中都设置一个主校正电路301，从而大大降低对整个射频发射机300校正时占用的面积以及消耗的功耗等资源。
而对于N个放大电路202中存在的具有差异性的第二非线性失真，例如，在电路板不同位置处导致的不同非线性失真，可使用从校正电路302对各自的发射通道进行校正，这样可以提高整个射频发射机300的校正精度和准确度。
示例性的，上述第一非线性失真是由在N个放大电路202中表现均相同的第一失真因素导致的，例如，温度波动或批次波动等。而上述第二非线性失真是由在N个放大电路202中表现可能存在差异的第二失真因素导致的，例如，电路工作过程中的不同位置的温度差异等。
由于射频发射机300中产生的非线性失真主要是由上述第一失真因素导致的，因此射频发射机300对第一失真因素导致的第一非线性失真的校正需求较高，所以用于校正第一非线性失真的主校正电路301中的电路结构一般设计的较为复杂，导致主校正电路301消耗的功耗、占用的面积相对较大。而在本申请中，N个发射通道可共用一个主校正电路301进行非线性失真的校正，从而可大大降低射频发射机300消耗的功耗以及占用的面积。
另外，当射频发射机300对输出的信号的线性度要求不高时，还可以关闭上述从校正电路302，由主校正电路301统一对N个放大电路202产生的非线性失真进行校正，从而进一步降低射频发射机300消耗的功耗。
当然，也可以关闭上述主校正电路301，由N个从校正电路302分别对对应的放 大电路202中产生的非线性失真进行校正。即在本申请实施例中，主校正电路301可以被配置为独立地启用或者禁用，从校正电路302也可以被配置为独立地启用或者禁用。
示例性的，如图5所示，上述主校正电路301，可用于分别从上述N个放大电路202(即N个非线性模块)的输出信号中获取第一反馈信号。例如，可以在N个放大电路202的输出端分别设置一个耦合器，这样，每个N个放大电路202的输出信号经过该耦合器后可将该输出信号中的一部分作为第一反馈信号输入至主校正电路301。
进而，仍如图5所示，主校正电路301可以基于APD(analog pre-distortion，模拟预失真)的方式或DPD(digital pre-distortion，数字预失真)校正电路对获取到的N个第一反馈信号进行预失真处理，预测出射频发射机300输出信号中存在的失真情况，并得到能够校正该失真情况的预失真信号。
那么，主校正电路301可以将该预失真信号作为主校正信号分别叠加至N个调制电路201的输入端，这样，后续每个发射通道输出的发射信号中实际存在的失真信号可与上述预失真信号互相抵消，得到线性度更高的发射信号。
示例性的，以射频发射机300中的一个发射通道为例，如图6所示，从校正电路302的工作原理与上述主校正电路301中的反馈调节原理类似。其中，从校正电路302的输入端用于从对应放大电路202(即非线性模块)的输出信号中获取第二反馈信号；进而，从校正电路302可基于该第二反馈信号，检测放大电路202在线性度满足预设线性度要求时所需的供电控制信号。
其中，线性度是指进行非线性校正时校正曲线与拟合直线间的最大偏差(ΔYmax)与满量程输出(Y)的百分比，也可称为非线性误差。线性度的取值越小，说明线性特性越好。那么，上述满足预设线性度要求可以是指非线性模块的线性度小于或等于某一预设阈值。例如，该预设阈值可以为0或某一取值较小的数值。当预设阈值等于0时，说明从校正电路302用于获取非线性模块在线性特性最好时的供电控制信号。
那么，从校正电路302将确定出的供电控制信号输出至该放大电路202的供电模块后，放大电路202的供电模块可基于上述供电控制信号生成相应的偏置电压或偏置电流，并将该偏置电压或偏置电流作为供电信号输入给放大电路202的非线性器件，使得放大电路202在该偏置电压或偏置电流下工作时可得到线性度更高的输出信号。
在一种可能的设计方式中，仍以一个发射通道为例，如图7所示，上述放大电路202可由VGA 601、PA 602以及滤波器603组成。其中，VGA 601的输入端与对应的调制电路201的输出端耦合，VGA 601的输出端与PA 602的输入端耦合，PA 602的输出端与滤波器603的输入端耦合，滤波器603的输出端与对应的天线203耦合。
通常，发射通道中的VGA 601或PA 602等放大器件在工作时容易产生奇次失真，引发非线性失真。因此，以VGA 601为非线性模块为例(VGA 601中包括供电模块以及产生非线性失真的非线性器件)，在图7所示的放大电路202的基础上，可将从校正电路302的输入端与VGA 601的输出端耦合，将从校正电路302的输出端与VGA 601的供电模块耦合。
那么，VGA 601输出的信号可作为第二反馈信号输入从校正电路302，从校正电路302可以为一个反馈循环(feedback)电路，该反馈电路可基于该第二反馈信号不 断调整VGA 601的偏置电压或偏置电流，使得VGA 601可以在不同的偏置电压或偏置电流下工作。这样，在不断调整VGA 601的偏置电压或偏置电流的过程中，当检测到出VGA 601的线性度小于或等于预设阈值时，反馈电路可将此时的偏置电压或偏置电流作为供电控制信号持续输入至VGA 601的非线性器件中，使得VGA 601在非线性失真最小的偏置电压或偏置电流下工作，从而校正VGA 601产生的第二非线性失真。
示例性的，可以将每次从VGA 601的输出信号中采样得到的信号作为第二反馈信号输入至从校正电路302的输入端，进而，从校正电路302可基于第二反馈信号通过搜索算法、SPFA(shortest path faster algorithm，队列优化)算法或者牛顿算法等迭代算法进行迭代，每次的迭代结果即为VGA 601的偏置电压或偏置电流。那么，当迭代结果收敛时，说明VGA 601此时的输出信号与输入信号的线性度最高，此时可将当前的迭代结果作为VGA 601的供电控制信号输入至VGA 601的非线性器件中。
在另一种可能的设计方式中，仍以VGA 601为非线性模块举例，如图8所示，从校正电路302可以包括反馈电路801和上述VGA 601的dummy电路802，该dummy电路802可用于复现VGA 601产生的非线性特性。例如，dummy电路802可以是对VGA 601中的非线性器件成比例缩小后的电路，因此，该dummy电路802可以最大程度的复现VGA 601出现的非线性特性，同时，由于dummy电路802的尺寸可以做的比较小，因此功耗较低。当然，当非线性模块为射频发射机中的其他器件时，该dummy电路802可以是相应非线性器件成比例缩小后的电路。
在校正VGA 601的非线性器件产生的非线性失真时，仍如图8所示，可将dummy电路802的输入端与VGA 601的输入端耦合，将dummy电路802的输出端与反馈电路801的输入端耦合，将反馈电路801的输出端与上述VGA 601的供电模块耦合。
这样一来，调制电路201向VGA 601输入的射频信号也会同样输入至dummy电路802中，那么，VGA 601中非线性器件出现的非线性特征也会出现在dummy电路802中。这样，dummy电路802可以将输出的带有非线性失真的信号作为第二反馈信号输入至反馈电路801，由反馈电路801基于该第二反馈信号不断更新dummy电路802的偏置电压或偏置电流，直至dummy电路802的线性度小于或等于预设阈值时，反馈电路801可将此时的偏置电压或偏置电流作为供电控制信号输入给VGA 601的供电模块，使得VGA 601在该偏置电压或偏置电流下工作，那么，VGA 601的输出信号与输入信号的线性度也将达到非线性失真最小的最优状态。
同时，由于反馈电路801只需将最终得到的最优的供电控制信号一次性输入给VGA 601的供电模块，而在上述反馈电路801与dummy电路802进行非线性校正的整个过程中，不会改变VGA 601的偏置电压或偏置电流，从而可降低校正过程对主通路信号的影响。
当然，也可以使用上述主校正电路301和从校正电路302组成的二级校正架构校正射频发射机300中的调制电路或PA等产生非线性失真的器件，又例如，还可以将射频发射机300中的多个器件(例如VGA和PA)作为一个整体，通过上述主校正电路301和从校正电路302组成的二级校正架构进行校正，本申请实施例对此不做任何限制。
在本申请的另一些实施例中，还可以在射频发射机中不设置上述主校正电路，即 射频发射机仅包括N(N为大于1的正整数)个发射通道和N个校正电路。
其中，每个发射通道中分别包括一个非线性模块。
并且，上述N个校正电路可分别与N个发射通道一一对应，其中，每个校正电路中包括反馈电路和虚拟dummy电路。与图8类似的，该dummy电路可用于复现对应的非线性模块的非线性特性。例如，dummy电路可以是将与之对应的发射通道中的非线性模块(例如VGA)成比例缩小后的电路，这样非线性模块出现的非线性特征也会出现在dummy电路中。
具体的，每个发射通道中的dummy电路的输入端与该非线性模块的输入端耦合，该dummy电路的输出端与反馈电路的输入端耦合，反馈电路的输出端与该非线性模块的供电模块耦合。
这样一来，dummy电路可以将输出的带有非线性失真的信号作为反馈信号输入至反馈电路，反馈电路可基于该反馈信号不断更新dummy电路的供电控制信号偏置电压或偏置电流，直至dummy电路的输出信号与输入信号的线性度满足预设要求(例如线性度最高)时，反馈电路可将此时的偏置电压或偏置电流作为供电控制信号输入给非线性模块的供电模块，使得非线性模块内的非线性器件可在该偏置电压或偏置电流下工作，那么，非线性模块的输出信号与输入信号的线性度也将达到非线性失真最小的最优状态。
另外，本申请实施例还提供一种射频接收机，如图9所示，该射频接收机800包括N(N＞1)个接收通道，每个接收通道中均包括解调电路801，以及与解调电路801耦合的放大电路802。可选的，每个接收通道中还可以包括与放大电路802耦合的天线803。
其中，天线803接收到其他通信设备以电磁波形式发送的信号后，可通过放大电路802对接收到的信号进行滤波、放大，进而，由解调电路801将频率较高的射频信号解调为频率较低的中频信号或基带信号，以便后续基带处理器可以从解调电路801输出的基带信号中读取该基带信号中的有效信息，或者，由下变频电路对解调电路801输出的中频信号进行下变频采样后得到基带处理器能够处理的基带信号。
基于图9所示的射频接收机800，由于射频接收机800容易产生非线性失真的器件主要是解调电路801，因此，以下以每个发射通道中的解调电路801为需要被校正的非线性模块举例说明本申请提供的二级校正架构原理。
如图10所示，该射频接收机800还包括主校正电路901和N个从校正电路902。N个从校正电路902分别与N个接收通道一一对应，并且，每个从校正电路902均与对应接收通道中的解调电路801耦合，主校正电路901也与N个接收通道中的每个解调电路801分别耦合。例如，如图10所示，每个从校正电路902均通过加法器903与对应接收通道中的解调电路801耦合，主校正电路901也通过该加法器903与N个接收通道中的每个解调电路801分别耦合。
由于射频接收机800中的解调电路801在工作时容易出现偶次谐波，引发非线性失真。因此，与上述射频发射机300类似的，射频接收机800中的主校正电路901用于统一校正N个解调电路801(即N个非线性模块)中共同存在的第一非线性失真，而每个从校正电路902只需校正与其耦合的解调电路802中存在的第二非线性失真， 其中，第一非线性失真和第二非线性失真可以参考前述实施例中的表述，此处不再赘述。
也就是说，对于N个解调电路801中共同存在的第一非线性失真，可使用主校正电路901统一对各个接收通道进行校正，这样不需要在每个接收通道中都设置一个主校正电路801，从而大大降低对整个射频接收机800校正时消耗的资源。
而对于N个解调电路801中存在差异性的第二非线性失真，发射通道可使用从校正电路902对各自的解调电路801进行校正，这样可以提高整个射频接收机800的校正精度和准确度。
示例性的，以一个接收通道为例，如图11所示，放大电路802具体可以包括滤波器1001以及LNA 1002，解调电路801具体可以包括混频器1003、本地振荡器1004以及模拟数字转换器(analog to digital converter，ADC)1005等。其中，滤波器1001的输入端与天线803耦合，滤波器1001的输出端与LNA 1002的输入端耦合，LNA 1002的输出端与混频器1003的第一输入端耦合，混频器1003的第二输入端与本地振荡器1004耦合，混频器1003的输出端与ADC 1005耦合；需要说明的是，多个接收通道可以复用同一个本地振荡器1004，当然，多个接收通道也可以复用除本地振荡器1004之外的其他器件，本申请实施例对此不做任何限制。
那么，天线803接收到的射频信号经过滤波器1001和LNA 1002后被滤波和放大，进而，与本地振荡器1004生成的LO(local oscillator)信号一同输入混频器1003中进行下变频，从而将射频信号转换为中频(intermediate frequency，IF)信号，该中频信号经过二次下变频得到基频信号，基频信号输入ADC 1005后被进一步转换为基带信号；当然，如果射频接收机采用零中频架构，则混频器1003可以直接将射频信号下转换为基频信号，此外，还有低中频，超外差等架构，也可以应用在本实施例的射频接收机中，具体可以参考在先技术。
但是，上述混频器1003在工作时容易产生偶次谐波，引发射频接收机800产生非线性失真。那么，可将混频器1003作为非线性模块(混频器1003包括供电模块以及产生非线性失真的非线性器件)，通过调节混频器1003内供电模块的偏置电压对混频器1003产生的非线性失真进行校正。
在图11所示的射频接收机800的基础上，如图12所示，每个混频器1003的偏置电压可以由主校正电路901以及对应接收通道上的从校正电路902共同调节。其中，该混频器1003的偏置电压可由加法器903的输出端提供，而加法器903的第一输入端为主校正电路901的输出端，加法器903的第二输入端为与所述混频器1003耦合的从校正电路902的输出端。
以混频器1003的偏置电压包括M(M＞1)个比特位举例，上述主校正电路901可用于校正混频器1003的偏置电压的前X位，从校正电路902用于校正该混频器1003的偏置电压的后Y位，X+Y＝M。
例如，如图12所示，假设需要将第一接收通道的混频器1003的偏置电压调节为0.91V以去除该通道的非线性失真，需要将第二接收通道的混频器1003的偏置电压调节为0.88V以去除该通道的非线性失真。其中，0.9V的偏置电压是由于每个接收通道共同存在的第一非线性失真导致的，而第一接收通道中多出的0.01V以及第二接收通 道中减少的0.02V偏置电压是由于每个接收通道各自存在的第二非线性失真导致的。
那么，可以由主校正电路901统一输出一个0.9V的第一电压，校正偏置电压的小数点后第一位，进而由第一接收通道的从校正电路902输出一个0.1V的第二电压，校正偏置电压的小数点后第二位。这样，主校正电路901输出的0.9V的第一电压与从校正电路902输出0.1V的第二电压经过加法器903相加后，可以向第一接收通道的混频器1003输出校正后的偏置电压0.91V。
类似的，可以由第二接收通道的从校正电路902输出一个-0.2V的第二电压，这样，主校正电路901输出的0.9V的第一电压与从校正电路902输出-0.2V的第二电压经过加法器903相加后，可以向第二接收通道的混频器1003输出校正后的偏置电压0.88V。
也就是说，对于N个混频器1003中共同存在的第一非线性失真，可通过主校正电路901统一使用大动态粗调的方式对各个接收通道进行校正，而对于N个混频器1003中存在差异的第二非线性失真，可通过本地的从校正电路902使用小动态细调的方式对各个接收通道分别进行校正。
另外，当射频接收机800对接收到的信号的校正精度要求不高时，例如，如果要求对上述第一接收通道和第二接收通道中混频器1003的偏置电压精确到小数点后一位时，第一接收通道和第二接收通道中混频器1003的偏置电压均为0.9V，此时，可以关闭上述N个从校正电路902，统一使用主校正电路901对各个接收通道进行校正，进一步降低射频接收机800的功耗。
在本申请的一些实施例中，在设计射频接收机800的具体电路结构时，可以对各个接收通道中非线性模块(例如上述混频器1003)产生的非线性失真进行仿真，进而得到整个射频接收机800中混频器1003产生的非线性失真的大致失真范围。例如，混频器1003的偏置电压的失真范围在0.8V至1.2V之间。
那么，射频接收机800在实际工作时，各个接收通道中的ADC 1005将混频器1003输出的基频(或中频)信号转换成基带信号后，可以确定出混频器1003是否产生非线性失真。如果产生非线性失真，则ADC 1005可指示主校正电路901进行非线性校正。此时，主校正电路901可以在上述0.8V至1.2V的失真范围之间不断调整各接收通道中混频器1003的偏置电压，直至各接收通道中混频器1003的线性度均达到预设要求(例如线性度均小于1)。当各接收通道中混频器1003的线性度均达到预设要求时，说明各接收通道中混频器1003产生的第一非线性失真被主校正电路901统一校正。而不同接收通道中混频器1003存在的具有差异性的第二非线性失真，可由各自接收通道中的从校正电路902在主校正电路901输出的偏置电压的基础上，继续不断在调整混频器1003的偏置电压，直至每个接收通道中混频器1003的线性度达到最优状态(例如线性度均小于0.2)。
示例性的，上述主校正电路具体可以为一个数字模拟转换器(digital to analog converter，DAC)，例如第一DAC，上述从校正电路也可以为一个DAC，例如第二DAC，本申请实施例对此不做任何限制。
当然，也可以使用上述主校正电路301和从校正电路302组成的二级校正架构校正射频接收机800中的放大电路或LNA等产生非线性失真的器件，又例如，还可以将射频接收机800中的多个器件作为一个整体，通过上述主校正电路301和从校正电路 302组成的二级校正架构进行校正，本申请实施例对此不做任何限制。
需要说明的是，上述图4-图12中所示的射频接收机800可以复用上述图3-图8中所示的射频发射机300中的相关器件，例如，天线、滤波器等，即上述射频接收机800和射频发射机300共用同一个天线和滤波器。
本申请的实施例还提供一种射频收发芯片，具体可集成有上述图3-图8中所示的射频发射机300以及上述图4-图12中所示的射频接收机800。
进一步地，本申请的实施例还提供一种包括上述射频收发芯片的通信设备，可应用于需要收发射频信号的任意设备中，例如手机、平板电脑、可穿戴设备、车载设备、增强现实(augmented reality，AR)\虚拟现实(virtual reality，VR)设备、笔记本电脑、超级移动个人计算机(ultra-mobile personal computer，UMPC)、上网本、个人数字助理(personal digital assistant，PDA)、基站、交换机、路由器等，本申请实施例对此不做任何限制。
在一种可能的设计方式中，上述通信设备具体包括基带处理器以及图4-图8中所示的射频发射机300，该射频发射机300与基带处理器耦合。其中，射频发射机300用于将基带处理器输出的基带信号转换为射频信号，并将该射频信号通过天线输出。
示例性的，如图4所示，上述射频发射机300包括N个发射通道，每个发射通道中均包括调制电路201，以及与调制电路201耦合的放大电路202。那么，可将每个发射通道中调制电路201的输入端作为射频发射机300的输入端，将射频发射机300的输入端耦合至基带处理器的输出端。并且，可将每个发射通道中放大电路202的输出端作为射频发射机300的输出端，将射频发射机300的输出端耦合至天线的输入端。
在另一种可能的设计方式中，上述通信设备具体包括基带处理器以及图10-图12中所示的射频接收机800，该射频接收机800与基带处理器耦合。其中，射频接收机800用于将天线接收到的射频信号转换为基带信号，并将该基带信号输入基带处理器。
示例性的，如图10所示，上述射频接收机800包括N个接收通道，每个接收通道中均包括调制电路201，以及与调制电路201耦合的放大电路202。那么，可将每个接收通道中放大电路202的输入端作为射频接收机800的输入端，将射频接收机800的输入端耦合至基带天线的输出端。并且，可将每个接收通道中调制电路201的输出端作为射频接收机800的输出端，将射频接收机800的输出端耦合至基带处理器的输入端。
可以理解的是，上述终端等为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，本申请实施例能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请实施例的范围。
在上述实施例中，可以全部或部分的通过软件，硬件，固件或者其任意组合来实现。当使用软件程序实现时，可以全部或部分地以计算机程序产品的形式出现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是 通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。该可用介质可以是磁性介质，(例如，软盘，硬盘、磁带)、光介质(例如，DVD)或者半导体介质(例如固态硬盘Solid State Disk(SSD))等。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何在本申请揭露的技术范围内的变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (20)

  1. 一种射频发射机，其特征在于，包括：
    N个发射通道，每个发射通道中分别包括一个非线性模块，N为大于1的正整数；
    主校正电路，分别与所述N个发射通道对应的N个非线性模块相耦合，用于为所述N个非线性模块提供主校正信号；以及
    N个从校正电路，分别耦合至所述N个非线性模块，其中，所述N个从校正电路分别与所述N个非线性模块一一对应，每个从校正电路用于为与之对应的非线性模块提供从校正信号；
    其中，所述主校正信号和第一从校正电路提供的从校正信号用于校正第一非线性模块的非线性失真，所述第一从校正电路为所述N个从校正电路中的任一个，所述第一非线性模块为所述N个非线性模块中与所述第一从校正电路耦合的非线性模块。
  2. 根据权利要求1所述的射频发射机，其特征在于，所述N个非线性模块中的每个非线性模块包括非线性器件和供电模块；
    该供电模块用于根据校正信号对该非线性模块中的非线性器件的供电进行调节，所述校正信号包括：所述主校正信号以及提供给该非线性模块的从校正信号。
  3. 根据权利要求2所述的射频发射机，其特征在于，
    所述主校正电路用于：分别从所述N个非线性模块中每个非线性模块的输出信号中获取第一反馈信号；根据获取到的N个第一反馈信号生成预失真信号；以及将所述预失真信号分别输入至所述N个非线性模块各自对应的供电模块，其中，所述预失真信号为所述主校正信号。
  4. 根据权利要求2或3中任一项所述的射频发射机，其特征在于，
    所述N个从校正电路中的每个从校正电路用于：从与该从校正电路对应的非线性模块输出的信号中获取第二反馈信号；根据所述第二反馈信号获取该非线性模块在线性度小于或等于预设阈值时的供电控制信号；将所述供电控制信号输入至与该非线性模块对应的供电模块，所述供电控制信号为所述从校正信号。
  5. 根据权利要求1-4中任一项所述的射频发射机，其特征在于，所述主校正信号用于校准所述N个非线性模块中共同存在的第一非线性失真，每个从校正电路提供的从校正信号用于校正对应的非线性模块中存在的第二非线性失真，所述N个非线性模块各自的第二非线性失真之间存在差异。
  6. 根据权利要求5所述的射频发射机，其特征在于，所述第一非线性失真是由于共性的第一失真因素造成的，所述第二非线性失真是由于差异性的第二失真因素造成的。
  7. 根据权利要求2-6中任一项所述的射频发射机，其特征在于，所述N个从校正电路中的每个从校正电路包括：反馈电路和虚拟dummy电路，所述dummy电路用于复现对应的非线性模块的非线性特性；
    所述dummy电路的输入端与该非线性模块的输入端相耦合，所述dummy电路的输出端与所述反馈电路的输入端耦合，所述反馈电路的输出端与该非线性模块中供电模块的输入端耦合；
    其中，所述反馈电路用于获取所述dummy电路在线性度小于或等于预设阈值时的 偏置电压或偏置电流，所述偏置电压或偏置电流为所述从校正信号。
  8. 根据权利要求2-7中任一项所述的射频发射机，其特征在于，所述非线性器件为功率放大器PA，混频器mixer或者可变增益放大器VGA中的至少一个。
  9. [根据细则91更正 09.05.2018]　
    根据权利要求1-8中任一项所述的射频发射机，其特征在于，所述主校正电路被配置为独立地启用或者禁用，所述从校正电路被配置为独立地启用或者禁用。
  10. 一种射频接收机，其特征在于，所述射频接收机包括：
    N个接收通道，每个接收通道中分别包括一个非线性模块，N为大于1的正整数；
    主校正电路，分别与所述N个接收通道对应的N个非线性模块相耦合，用于为所述N个非线性模块提供主校正信号；以及
    N个从校正电路，分别耦合至所述N个非线性模块，其中，所述N个从校正电路分别与所述N个非线性模块一一对应，每个从校正电路用于为与之对应的非线性模块提供从校正信号；
    其中，所述主校正信号和第一从校正电路提供的从校正信号用于校正第一非线性模块的非线性失真，所述第一从校正电路为所述N个从校正电路中的任一个，所述第一非线性模块为所述N个非线性模块中与所述第一从校正电路耦合的非线性模块。
  11. 根据权利要求10所述的射频接收机，其特征在于，所述N个非线性模块中每个非线性模块包括非线性器件和供电模块，
    该供电模块用于根据校正信号对该非线性模块中的非线性器件的供电进行调节，所述校正信号包括：所述主校正信号以及提供给该供电模块的从校正信号。
  12. 根据权利要求11所述的射频接收机，其特征在于，每个非线性模块中的非线性器件具有一个M位的偏置电压，所述N个接收通道对应的N个偏置电压之间存在差异，M为大于1的正整数；
    其中，所述主校正电路用于校正所述N个偏置电压的前X位，所述N个从校正电路中的每个从校正电路用于校正与对应的非线性器件的偏置电压的后Y位，X+Y＝M，X和Y均为正整数。
  13. 根据权利要求10-12中任一项所述的射频接收机，其特征在于，
    所述N个从校正电路中的每个从校正电路分别通过一个加法器与对应的非线性模块耦合，所述主校正电路通过所述N个从校正电路对应N个加法器分别与所述N个非线性模块耦合。
  14. 根据权利要求10-13中任一项所述的射频接收机，其特征在于，所述主校正信号用于校准所述N个非线性模块中共同存在的第一非线性失真，每个从校正电路提供的从校正信号用于校正对应的非线性模块中存在的第二非线性失真，所述N个非线性模块各自的第二非线性失真之间存在差异。
  15. 根据权利要求14所述的射频接收机，其特征在于，所述第一非线性失真是由于共性的第一失真因素造成的，所述第二非线性失真是由于差异性的第二失真因素造成的。
  16. 根据权利要求10-15中任一项所述的射频接收机，其特征在于，所述非线性模块为低噪声放大器LNA，混频器mixer或者可变增益放大器VGA中的至少一个。
  17. 一种射频发射机，其特征在于，包括：
    N个发射通道，每个发射通道中分别包括一个非线性模块，每个非线性模块包括供电模块和非线性器件，N为大于1的正整数；
    N个校正电路，所述N个校正电路分别耦合至N个非线性模块，所述N个从校正电路分别与所述N个非线性模块一一对应；其中，每个校正电路中包括反馈电路和虚拟dummy电路，所述dummy电路用于复现对应的非线性模块的非线性特性；所述dummy电路的输入端与该非线性模块的输入端相耦合，所述dummy电路的输出端与所述反馈电路的输入端耦合，所述反馈电路的输出端与该非线性模块中供电模块的输入端耦合；
    其中，所述反馈电路用于根据所述dummy电路的偏置电压或偏置电流生成校正信号，以校正该非线性模块产生的非线性失真。
  18. 根据权利要求17所述的射频发射机，其特征在于，所述反馈电路具体用于：检测所述dummy电路在线性度小于或等于预设阈值时的偏置电压或偏置电流，并使用所述偏置电压或偏置电流校正该非线性模块产生的非线性失真。
  19. 一种通信设备，其特征在于，包括：基带处理器以及如权利要求1-9或17-18中任一项所述的射频发射机；
    所述射频发射机与所述基带处理器耦合；
    其中，所述射频发射机用于将所述基带处理器输出的基带信号转换为射频信号，并将所述射频信号通过天线进行发射。
  20. 一种通信设备，其特征在于，包括基带处理器以及如权利要求10-16中任一项所述的射频接收机；
    所述射频接收机与所述基带处理器耦合；
    其中，所述射频接收机用于将从天线接收到的射频信号转换为基带信号，并将所述基带信号输入所述基带处理器。
PCT/CN2018/085188 2018-04-28 2018-04-28 一种射频接收机、射频发射机及通信设备 WO2019205171A1 (zh)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PCT/CN2018/085188 WO2019205171A1 (zh) 2018-04-28 2018-04-28 一种射频接收机、射频发射机及通信设备
EP18916406.4A EP3780388A4 (en) 2018-04-28 2018-04-28 HIGH FREQUENCY RECEIVER, HIGH FREQUENCY TRANSMITTER AND COMMUNICATION DEVICE
CN201880092793.0A CN112042114B (zh) 2018-04-28 2018-04-28 一种射频接收机、射频发射机及通信设备
US17/080,058 US11387785B2 (en) 2018-04-28 2020-10-26 Radio frequency receiver, radio frequency transmitter, and communications device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2018/085188 WO2019205171A1 (zh) 2018-04-28 2018-04-28 一种射频接收机、射频发射机及通信设备

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US17/080,058 Continuation US11387785B2 (en) 2018-04-28 2020-10-26 Radio frequency receiver, radio frequency transmitter, and communications device

Publications (1)

Publication Number Publication Date
WO2019205171A1 true WO2019205171A1 (zh) 2019-10-31

Family

ID=68294738

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/085188 WO2019205171A1 (zh) 2018-04-28 2018-04-28 一种射频接收机、射频发射机及通信设备

Country Status (4)

Country Link
US (1) US11387785B2 (zh)
EP (1) EP3780388A4 (zh)
CN (1) CN112042114B (zh)
WO (1) WO2019205171A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113131976A (zh) * 2021-03-11 2021-07-16 西安电子科技大学 一种分米波混合波束赋形方法、系统及应用

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1700591A (zh) * 2004-05-19 2005-11-23 株式会社日立国际电气 预失真器
CN101316124A (zh) * 2007-05-31 2008-12-03 普天信息技术研究院有限公司 一种无线通信系统中的数字预失真装置
EP2204903A1 (en) * 2008-12-31 2010-07-07 Ubidyne Inc. A radio station and active antenna array
CN102594749A (zh) * 2012-02-28 2012-07-18 中兴通讯股份有限公司 一种数字预失真处理方法及装置
US20180026586A1 (en) * 2016-07-20 2018-01-25 Qualcomm Incorporated Digital pre-distortion for multi-antenna systems

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE520728C2 (sv) * 2001-11-12 2003-08-19 Ericsson Telefon Ab L M Förfarande för icke-linjär modellering
JP4394409B2 (ja) * 2003-09-25 2010-01-06 株式会社日立国際電気 プリディストーション方式歪補償機能付き増幅器
US7952431B2 (en) * 2009-08-28 2011-05-31 Acco Semiconductor, Inc. Linearization circuits and methods for power amplification
US8542768B2 (en) * 2009-12-21 2013-09-24 Dali Systems Co. Ltd. High efficiency, remotely reconfigurable remote radio head unit system and method for wireless communications
JP5783070B2 (ja) * 2012-01-31 2015-09-24 富士通株式会社 信号処理システムおよび信号処理方法
US9413449B2 (en) * 2013-02-08 2016-08-09 Pioneer Corporation Diversity reception apparatus, diversity reception method, reception program, and recording medium
WO2015088857A1 (en) * 2013-12-09 2015-06-18 Marvell World Trade Ltd. Power amplifier with wide band am-am feedback and digital pre-distortion
CN108292926B (zh) * 2015-11-27 2021-09-07 瑞典爱立信有限公司 有源天线阵列的线性化
US9853599B2 (en) * 2015-12-04 2017-12-26 The Boeing Company Simultaneous linearization of multiple power amplifiers with independent power
US10277381B2 (en) * 2016-01-09 2019-04-30 Huawei Technologies Co., Ltd. Receiver path distortion mitigation using adaptive filter feedback
US10686415B2 (en) * 2016-12-29 2020-06-16 Patrick Pratt Digital predistortion for multiple power amplifiers
CN110326214B (zh) * 2017-03-02 2023-06-23 住友电气工业株式会社 失真补偿装置和失真补偿方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1700591A (zh) * 2004-05-19 2005-11-23 株式会社日立国际电气 预失真器
CN101316124A (zh) * 2007-05-31 2008-12-03 普天信息技术研究院有限公司 一种无线通信系统中的数字预失真装置
EP2204903A1 (en) * 2008-12-31 2010-07-07 Ubidyne Inc. A radio station and active antenna array
CN102594749A (zh) * 2012-02-28 2012-07-18 中兴通讯股份有限公司 一种数字预失真处理方法及装置
US20180026586A1 (en) * 2016-07-20 2018-01-25 Qualcomm Incorporated Digital pre-distortion for multi-antenna systems

Also Published As

Publication number Publication date
EP3780388A4 (en) 2021-04-21
EP3780388A1 (en) 2021-02-17
CN112042114A (zh) 2020-12-04
US11387785B2 (en) 2022-07-12
US20210044259A1 (en) 2021-02-11
CN112042114B (zh) 2023-07-28

Similar Documents

Publication Publication Date Title
US11265061B2 (en) Correction apparatus and correction method
KR102492442B1 (ko) 단일 트랜지스터를 사용하여 lo 누설 및 이미지 제거를 검출하는 방법 및 장치
US7792214B2 (en) Polar modulation transmitter circuit and communications device
CN108540240B (zh) 用于校准射频发射器以补偿共模本地振荡器泄漏的装置和方法
US10530401B2 (en) Outphasing-calibration in a radio frequency (RF) transmitter device
US7894546B2 (en) Replica linearized power amplifier
CN101622845A (zh) 用于活动式if架构的i/q校准
US10917051B2 (en) Wireless architectures and digital pre-distortion (DPD) techniques using closed loop feedback for phased array transmitters
CN110729972B (zh) 校准装置及校准方法
US20140162576A1 (en) Envelope Detector and Method for Detecting an Envelope of a Signal to be Amplified by a Power Amplifier
TWI813032B (zh) 偏置裝置
US9900016B1 (en) Compensation of non-linearity at digital to analog converters
US20230216654A1 (en) Digital transmitter with duty cycle correction
US20230147812A1 (en) Amplitude offset calibration method, device, and storage medium
US10749480B2 (en) Transmitter, communication system, and method and program for controlling transmitter
CN101442511A (zh) 提高零中频发信机射频指标的方法及装置
US11581955B2 (en) Transceiving device and calibration method thereof
WO2019205171A1 (zh) 一种射频接收机、射频发射机及通信设备
US20190393908A1 (en) Device and method for compensating nonlinearity of a transmitter
US11764738B2 (en) Segmented power amplifier arrangements with feedforward adaptive bias circuits
US20150155837A1 (en) Amplifier, transmitter, and amplification method
US9584168B2 (en) Distortion compensator and distortion compensation method
US20240250704A1 (en) Low-complexity amplitude error correction in a wireless communication circuit
US20230082415A1 (en) Phase and amplitude error correction in a transmission circuit
JP2006121408A (ja) 変調信号送信回路および無線通信装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18916406

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2018916406

Country of ref document: EP

Effective date: 20201109