WO2017107140A1 - 一种功放控制方法、装置及功放控制系统 - Google Patents
一种功放控制方法、装置及功放控制系统 Download PDFInfo
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- 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
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
- H03F1/0288—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers using a main and one or several auxiliary peaking amplifiers whereby the load is connected to the main amplifier using an impedance inverter, e.g. Doherty amplifiers
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- 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
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
- H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
- H03F1/0216—Continuous control
- H03F1/0222—Continuous control by using a signal derived from the input signal
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- 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
- H03F1/3282—Acting on the phase and the amplitude of the input signal
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- 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
- H03F1/56—Modifications of input or output impedances, not otherwise provided for
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
- H03F3/19—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
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- 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
- H03F3/211—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only using a combination of several amplifiers
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- 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
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/60—Amplifiers in which coupling networks have distributed constants, e.g. with waveguide resonators
- H03F3/602—Combinations of several amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/102—A non-specified detector of a signal envelope being used in an amplifying circuit
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- 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
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/408—Indexing scheme relating to amplifiers the output amplifying stage of an amplifier comprising three power stages
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/423—Amplifier output adaptation especially for transmission line coupling purposes, e.g. impedance adaptation
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- 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
Definitions
- the present invention relates to the field of wireless communications, and in particular, to a power amplifier control method and apparatus, and a power amplifier control system.
- wireless communication uses a variety of different modulation signals, such as OFDM (Orthogonal Frequency Division Multiplexing), CDMA (Code Division Multiple Access), and TDMA (Time). Division Multiple Access, Time Division Multiple Access, etc.
- OFDM Orthogonal Frequency Division Multiplexing
- CDMA Code Division Multiple Access
- TDMA Time Division Multiple Access
- OFDM Orthogonal Frequency Division Multiplexing
- CDMA Code Division Multiple Access
- TDMA Time Division Multiple Access
- the base station power amplifier can adopt two methods, one is power back-off, that is, the working state of the power amplifier is set to class A or class AB, but, due to the power amplifier tube Limited characteristics, this method will cause a significant drop in power amplifier efficiency, in the case of the same output power, will make the base station consume more energy; the other is high-efficiency power amplifier technology, this method can not only get higher The efficiency of the amplifier, and the linearity of the amplifier can also meet the requirements of the relevant agreements.
- the high-efficiency power amplifier technology commonly used in the industry may include Doherty technology and ET (Envelope Tracking) technology. Specifically, it can be classified into the following three types:
- the first is a high-efficiency power amplifier technology based on traditional ET power amplifiers.
- the ET power amplifier generally includes an envelope modulator and a class AB power amplifier, wherein the envelope modulator generates an envelope voltage instead of a fixed voltage to power the power amplifier to perform envelope tracking on the power amplifier, thereby The power amplifier is always in a near-saturated working state, which improves the working efficiency of the retreat.
- the overall working efficiency of the ET power amplifier is equal to the product of the working efficiency of the envelope modulator and the working efficiency of the power amplifier, and the working efficiency of the envelope modulator cannot reach 100%, there is a certain efficiency loss, especially in Under the peak-to-average modulation signal, the back-off efficiency is difficult to reach very high due to the limitation of the power amplifier itself.
- the envelope voltage is too low, the power tube gain is also caused. A significant drop in PAE (Power Add Efficiency) will further deteriorate, which makes the power amplifier effect or power amplifier performance of this method not good.
- the Doherty ET power amplifier may include an envelope modulator, a Doherty main power amplifier, and a Doherty auxiliary power amplifier (ie, a peak power amplifier), wherein
- the envelope modulator is connected to the main power amplifier to perform envelope tracking on the main power amplifier, and the auxiliary power amplifier is powered by a fixed voltage, so that Doherty's fallback efficiency advantage can be utilized to improve the efficiency of the peak-to-average ratio signal under the retreat.
- the Doherty ET power amplifier may include an envelope modulator, a Doherty main power amplifier, and a Doherty auxiliary power amplifier, and an envelope.
- the modulator is connected to the main power amplifier and the auxiliary power amplifier to separately track the envelope of Doherty's main power amplifier and auxiliary power amplifier, so that Doherty's fallback efficiency advantage can be utilized to improve the efficiency of the peak-to-average ratio signal under the retreat.
- the signal of the Doherty main power amplifier link and the signal of the auxiliary power amplifier link have different phases, so the phase of the Doherty power amplifier cannot be optimized under different envelope voltages, thereby making this method
- the power amplifier has a poor effect and the power amplifier performance is not good.
- the existing high-efficiency power amplifier technology has problems such as poor performance and poor performance. Therefore, a new power amplifier technology is needed to solve the above problems.
- the embodiment of the invention provides a power amplifier control method and device and a power amplifier control system, so as to solve the problems of poor performance and poor performance of the existing high-efficiency power amplifier technology.
- a power amplifier control method which is applicable to an envelope control circuit and a plurality of a power amplifier system of a Hermit power amplifier circuit, wherein the envelope control circuit includes an envelope modulator for generating an envelope voltage according to an envelope signal output from the baseband unit and outputting the power supply voltage to the Doherty power amplifier circuit;
- the Herti power amplifier circuit comprises a main power amplifier and an auxiliary power amplifier, wherein the main power amplifier and the auxiliary power amplifier are respectively used for amplifying the baseband signal output by the baseband unit according to an envelope voltage output by the envelope modulator, the method comprising:
- the signals of the main power amplifier link and/or the auxiliary power amplifier link of the Doherty power amplifier circuit are phase-modulated, so that the signal of the main power amplifier link and the signal of the auxiliary power amplifier link after phase modulation are performed.
- the phase difference between the two is a set value corresponding to the current value of the envelope signal, and the set value is when the supply voltage of the Doherty power amplifier circuit is an envelope voltage corresponding to the current value of the envelope signal, The optimum phase value of the Hertty power amplifier circuit.
- the phase modulation control signal is generated according to the envelope signal output by the baseband unit, including:
- the first phase-modulation control signal enables the phase-modulated main power amplifier
- the phase difference between the signal of the link and the signal of the auxiliary power amplifier link is a first phase value, and the first phase value is a minimum envelope voltage of the Doherty power amplifier circuit, and the Doherty power amplifier circuit Optimal phase value; or,
- the second phase modulation control signal enables the phased main power amplifier
- the phase difference between the signal of the link and the signal of the auxiliary power amplifier link is a second phase value, and the second phase value is a maximum envelope voltage of the Doherty power amplifier circuit, and the Doherty power amplifier circuit An optimal phase value; wherein the set envelope signal maximum value is greater than the set envelope turn-on threshold; or
- the third phase modulation control signal can make the phase between the phased main power amplifier link signal and the auxiliary power amplifier link signal
- the third phase value is a third phase value; the third phase value is corresponding to an envelope opening threshold and a second phase value corresponding to a current value of the envelope signal, the first phase value, the second phase value, and the first phase value
- the maximum value of the envelope signal is obtained by linear interpolation.
- the signals of the main power amplifier link and/or the auxiliary power amplifier link of the Doherty power amplifier circuit are phase-modulated according to the generated phase modulation control signal.
- the signals of the main power amplifier link and/or the auxiliary power amplifier link of the Doherty power amplifier circuit are adjusted. Phase; or,
- the signals of the main power amplifier link and/or the auxiliary power amplifier link of the Doherty power amplifier circuit are adjusted. phase.
- the number of the auxiliary power amplifiers of the Doherty power amplifier circuit is one or more; and, if the Doherty power amplifier circuit is assisted If the number of power amplifiers is multiple, the signals of the auxiliary power amplifier link of the Doherty power amplifier circuit are phase-modulated, including:
- the signals of the auxiliary power amplifier links of the Doherty power amplifier circuit are phase-modulated.
- the envelope control circuit includes an envelope modulator respectively connected to each power amplifier in the Doherty power amplifier circuit, the one An envelope modulator for outputting an envelope voltage to each of the power amplifiers in the Doherty power amplifier circuit; or
- each of the plurality of envelope modulators being used for a corresponding one of the Doherty power amplifier circuits
- the amplifier outputs the envelope voltage
- the phase modulation is digital phase modulation or analog phase modulation.
- a power amplifier control apparatus for use in a power amplifier system including an envelope control circuit and a Doherty power amplifier circuit, wherein the envelope control circuit includes a baseband unit The output envelope signal generates an envelope voltage and is output as a supply voltage to an envelope modulator of the Doherty power amplifier circuit; the Doherty power amplifier circuit includes a main power amplifier and an auxiliary power amplifier, and the main power amplifier and the auxiliary power amplifier are respectively used according to The envelope voltage output by the envelope modulator amplifies the baseband signal output by the baseband unit, and the device includes:
- a signal generating unit configured to generate a phase modulation control signal according to an envelope signal output by the baseband unit
- a signal phase modulating unit configured to modulate a signal of a main power amplifier link and/or an auxiliary power amplifier link of the Doherty power amplifier circuit according to the generated phase modulation control signal, so that the signal of the main power amplifier link after phase modulation
- the phase difference between the signal and the auxiliary power amplifier link is a set value corresponding to the current value of the envelope signal, and the set value is the power supply voltage of the Doherty power amplifier circuit corresponding to the current value of the envelope signal.
- the envelope voltage is the optimum phase value of the Doherty power amplifier circuit.
- the signal generating unit is specifically configured to: if it is determined that a current value of the envelope signal is not greater than a set envelope turn-on threshold, Encapsulating a signal, generating a first phase modulation control signal; the first phase modulation control signal is capable of causing a phase difference between a signal of the phase-modulated main power amplifier link and a signal of the auxiliary power amplifier link to be a first phase value,
- the first phase value is an optimum phase value of the Doherty power amplifier circuit when the power supply voltage of the Doherty power amplifier circuit is the minimum envelope voltage; or
- the second phase modulation control signal enables the phased main power amplifier
- the phase difference between the signal of the link and the signal of the auxiliary power amplifier link is a second phase value, and the second phase value is a maximum envelope voltage of the Doherty power amplifier circuit, and the Doherty power amplifier circuit An optimal phase value; wherein the set envelope signal maximum value is greater than the set envelope turn-on threshold; or
- the third phase modulation control signal can be such that the phase difference between the phase-modulated main power amplifier link signal and the auxiliary power amplifier link signal is a third phase value; the third phase value is based on the current value of the envelope signal and the first phase value And an envelope signal corresponding to the second phase value and the first phase value corresponding to the envelope opening threshold and the second phase value The maximum value of the number is obtained by linear interpolation.
- the signal phase modulation unit is specifically configured to be corresponding to a main power amplifier link and/or an auxiliary power amplifier link of the Doherty power amplifier circuit. After the baseband signal is subjected to frequency conversion processing, the signals of the main power amplifier link and/or the auxiliary power amplifier link of the Doherty power amplifier circuit are phase-modulated; or
- the signals of the main power amplifier link and/or the auxiliary power amplifier link of the Doherty power amplifier circuit are adjusted. phase.
- the number of the auxiliary power amplifiers of the Doherty power amplifier circuit is one or more;
- the signal phase modulation unit is specifically configured to: when the number of auxiliary power amplifiers of the Doherty power amplifier circuit is multiple, and the phase modulation signal of the auxiliary power amplifier link of the Doherty power amplifier circuit needs to be phase-modulated, The signals of the auxiliary power amplifier links of the Doherty power amplifier circuit are phase-modulated.
- the envelope control circuit includes an envelope modulator respectively connected to each power amplifier in the Doherty power amplifier circuit, the one An envelope modulator for outputting an envelope voltage to each of the power amplifiers in the Doherty power amplifier circuit;
- each of the plurality of envelope modulators being used for a corresponding one of the Doherty power amplifier circuits
- the amplifier outputs the envelope voltage
- the phase modulation is digital phase modulation or analog phase modulation.
- a power amplifier control apparatus for use in a power amplifier system including an envelope control circuit and a Doherty power amplifier circuit, wherein the envelope control circuit includes a packet generation signal for generating an envelope signal according to a baseband unit The voltage is output as a supply voltage to an envelope modulator of the Doherty power amplifier circuit; the Doherty power amplifier circuit includes a main power amplifier and an auxiliary power amplifier, and the main power amplifier and the auxiliary power amplifier are respectively used for a packet output according to the envelope modulator a voltage that amplifies the baseband signal output by the baseband unit, the device comprising:
- a signal generator configured to generate a phase modulation control signal according to an envelope signal output by the baseband unit
- a signal modulator for modulating a signal of a main power amplifier link and/or an auxiliary power amplifier link of the Doherty power amplifier circuit according to the generated phase modulation control signal, so that the signal of the main power amplifier link after the phase modulation is
- the phase difference between the signals of the auxiliary power amplifier link is a set value corresponding to the current value of the envelope signal, and the set value is a power supply voltage of the Doherty power amplifier circuit corresponding to the current value of the envelope signal.
- the optimum phase value of the Doherty power amplifier circuit when envelope voltage.
- the signal generator is specifically configured to determine, if the current value of the envelope signal is not greater than a set envelope turn-on threshold, Encapsulating a signal, generating a first phase modulation control signal; the first phase modulation control signal is capable of causing a phase difference between a signal of the phase-modulated main power amplifier link and a signal of the auxiliary power amplifier link to be a first phase value,
- the first phase value is an optimum phase value of the Doherty power amplifier circuit when the power supply voltage of the Doherty power amplifier circuit is the minimum envelope voltage; or
- the second phase modulation control signal enables the phased main power amplifier
- the phase difference between the signal of the link and the signal of the auxiliary power amplifier link is a second phase value, and the second phase value is a maximum envelope voltage of the Doherty power amplifier circuit, and the Doherty power amplifier circuit An optimal phase value; wherein the set envelope signal maximum value is greater than the set envelope turn-on threshold; or
- the third phase modulation control signal can be such that the phase difference between the phase-modulated main power amplifier link signal and the auxiliary power amplifier link signal is a third phase value; the third phase value is based on the current value of the envelope signal and the first phase value And the second phase value and the envelope opening threshold corresponding to the first phase value and the maximum envelope signal corresponding to the second phase value are linearly interpolated.
- the signal modulator is specifically configured to be used in a baseband corresponding to a main power amplifier link and/or an auxiliary power amplifier link of the Doherty power amplifier circuit After the signal is frequency-converted, the main power amplifier link and/or auxiliary power amplifier chain of the Doherty power amplifier circuit The signal of the road is phase-modulated; or,
- the signals of the main power amplifier link and/or the auxiliary power amplifier link of the Doherty power amplifier circuit are adjusted. phase.
- the number of the auxiliary power amplifiers of the Doherty power amplifier circuit is one or more;
- the signal modulator is specifically configured to: when the number of auxiliary power amplifiers of the Doherty power amplifier circuit is multiple, and the phase modulation signal of the auxiliary power amplifier link of the Doherty power amplifier circuit needs to be phase-modulated, The signals of the auxiliary power amplifier links of the Doherty power amplifier circuit are all phase-modulated.
- the envelope control circuit includes an envelope modulator respectively connected to each power amplifier in the Doherty power amplifier circuit, the one An envelope modulator for outputting an envelope voltage to each of the power amplifiers in the Doherty power amplifier circuit; or
- each of the plurality of envelope modulators being used for a corresponding one of the Doherty power amplifier circuits
- the amplifier outputs the envelope voltage
- the phase modulation is digital phase modulation or analog phase modulation.
- a power amplifier control system comprising: a power amplifier system including an envelope control circuit and a Doherty power amplifier circuit, wherein the envelope control circuit includes an envelope for generating an envelope signal according to a baseband unit output The voltage is output as a supply voltage to an envelope modulator of the Doherty power amplifier circuit; the Doherty power amplifier circuit includes a main power amplifier and an auxiliary power amplifier, and the main power amplifier and the auxiliary power amplifier are respectively used for an envelope according to an envelope modulator output And amplifying the baseband signal output by the baseband unit, the power amplifier control system further comprising the second aspect, or the implementation of any one of the first to fifth possible implementations of the second aspect Power amplifier control device.
- the phase modulation control signal can be generated according to the envelope signal output by the baseband unit, and the main body of the Doherty power amplifier circuit is generated according to the phase modulation control signal.
- the signals of the power amplifier link and/or the auxiliary power amplifier link are phase-modulated, so that The phase difference between the signal of the main power amplifier link and the signal of the auxiliary power amplifier link is a set value corresponding to the current value of the envelope signal, and the set value is the power supply voltage of the Doherty power amplifier circuit.
- the main power amplifier link and/or the auxiliary power amplifier link can be phase compensated for different envelope voltages, so that between the main power amplifier link and the auxiliary power amplifier link of the Doherty power amplifier circuit at different envelope voltages
- the phase difference can be optimized to improve the performance and performance of the amplifier.
- FIG. 1 is a schematic structural view of a conventional ET power amplifier described in the prior art
- FIG. 2 is a schematic structural view of a separately fed Doherty ET power amplifier described in the prior art
- FIG. 3 is a schematic structural diagram of a separately fed Doherty ET power amplifier according to the prior art
- FIG. 4 is a schematic flow chart of a power amplifier control method according to Embodiment 1 of the present invention.
- FIG. 5 is a schematic diagram showing a relationship between a phase difference between a signal of a main power amplifier link and a signal of an auxiliary power amplifier link and an envelope signal according to the first embodiment of the present invention
- FIG. 6 is a schematic structural view 1 of a power amplifier system according to Embodiment 1 of the present invention.
- FIG. 7 is a second schematic structural diagram of a power amplifier system according to Embodiment 1 of the present invention.
- FIG. 8 is a schematic structural view 3 of a power amplifier system according to Embodiment 1 of the present invention.
- FIG. 9 is a schematic structural diagram of a power amplifier control apparatus according to Embodiment 2 of the present invention.
- FIG. 10 is a schematic diagram 1 of a power amplifier control structure according to Embodiment 2 of the present invention.
- FIG. 11 is a second schematic diagram of a power amplifier control structure according to Embodiment 2 of the present invention.
- FIG. 12 is a third schematic diagram of a power amplifier control structure according to Embodiment 2 of the present invention.
- FIG. 13 is a schematic diagram 4 of a power amplifier control structure according to Embodiment 2 of the present invention.
- FIG. 14 is a schematic diagram 5 of a power amplifier control structure according to Embodiment 2 of the present invention.
- FIG. 15 is a schematic structural diagram of a power amplifier control apparatus according to Embodiment 3 of the present invention.
- Embodiment 1 is a diagrammatic representation of Embodiment 1:
- the first embodiment of the present invention provides a power amplifier control method, as shown in FIG. 4 , which is the first embodiment of the present invention.
- FIG. 4 A schematic flowchart of a power amplifier control method applicable to a power amplifier system including an envelope control circuit and a Doherty power amplifier circuit, wherein the envelope control circuit includes an envelope for output according to a baseband unit The signal generates an envelope voltage and is output as a supply voltage to an envelope modulator of the Doherty power amplifier circuit; the Doherty power amplifier circuit includes a main power amplifier and an auxiliary power amplifier, and the main power amplifier and the auxiliary power amplifier are respectively used according to an envelope modulator The output envelope voltage is amplified by the baseband signal output by the baseband unit.
- the control method may include the following steps:
- Step 401 Generate a phase modulation control signal according to an envelope signal output by the baseband unit.
- Step 402 Perform phase modulation on the signal of the main power amplifier link and/or the auxiliary power amplifier link of the Doherty power amplifier circuit according to the generated phase modulation control signal, so that the signal of the main power amplifier link and the auxiliary power amplifier chain after phase adjustment are performed.
- the phase difference between the signals of the roads is a set value corresponding to the current value of the envelope signal, and the set value is the envelope voltage of the Doherty power amplifier circuit corresponding to the current value of the envelope signal.
- the optimum phase value of the Doherty power amplifier circuit is performed.
- the Doherty power amplifier circuit when the Doherty power amplifier circuit is phase-modulated according to the generated phase-modulation control signal, only the signal of the main power amplifier link can be phase-modulated, and the phase of the signal of the auxiliary power amplifier link is kept unchanged; Only phase-modulate the signal of the auxiliary power amplifier link, keep the phase of the signal of the main power amplifier link unchanged; or phase-modulate the signal of the main power amplifier link and the signal of the auxiliary power amplifier link; that is, the root According to the actual demand, the power amplifier link that needs to be phase-modulated is selected, as long as the phase difference between the signal of the Doherty main power amplifier link and the signal of the auxiliary power amplifier link reaches the required value, which is not described herein.
- the signal of the main power amplifier link and/or the auxiliary power amplifier link of the Doherty power amplifier circuit can be phase-modulated by the generated phase modulation control signal, so that the main power amplifier of the Doherty power amplifier circuit
- the phase difference between the signal of the link and the signal of the auxiliary power amplifier link reaches the optimal phase of the Doherty power amplifier circuit under the envelope voltage value corresponding to the current envelope signal, that is, the main envelope voltage can be different for the main
- the power amplifier link and/or the auxiliary power amplifier link are phase-compensated so that the phase difference between the main power amplifier link and the auxiliary power amplifier link can reach an optimum value under different envelope voltages, thereby improving
- the effect and performance of the power amplifier solve the problems of poor performance and poor performance of the existing high-efficiency power amplifier technology.
- generating the phase modulation control signal according to the envelope signal output by the baseband unit, as described in step 401, may include:
- the first phase-modulation control signal enables the phase-modulated main power amplifier
- the phase difference between the signal of the link and the signal of the auxiliary power amplifier link is a first phase value, and the first phase value is a minimum envelope voltage of the Doherty power amplifier circuit, and the Doherty power amplifier circuit Optimal phase value; or,
- the second phase modulation control signal enables the phased main power amplifier
- the phase difference between the signal of the link and the signal of the auxiliary power amplifier link is a second phase value, and the second phase value is a maximum envelope voltage of the Doherty power amplifier circuit, and the Doherty power amplifier circuit An optimal phase value; wherein the set envelope signal maximum value is greater than the set envelope turn-on threshold; or
- the third phase modulation control signal can be such that the phase difference between the phase-modulated main power amplifier link signal and the auxiliary power amplifier link signal is a third phase value; the third phase value is based on the current value of the envelope signal and the first phase value , The second phase value and the envelope opening threshold corresponding to the first phase value and the maximum envelope signal corresponding to the second phase value are linearly interpolated.
- a phase between the signal of the main power amplifier link and the signal of the auxiliary power amplifier link can be generated.
- the difference follows a phase-modulated control signal that linearly changes the envelope signal.
- the reason why the first phase value is the minimum envelope voltage is the optimal phase value of the Doherty power amplifier circuit because the current value of the envelope signal is not greater than the set envelope turn-on threshold (The threshold can be flexibly adjusted according to the actual situation.
- VDDL ie, the minimum envelope voltage
- the second phase value is the optimum phase value of the Doherty power amplifier circuit when the maximum envelope voltage is because the power amplifier system operates at Doherty when the envelope signal is greater than the set envelope turn-on threshold.
- the output voltage of the envelope modulator follows the envelope signal envelope change.
- the envelope modulator outputs a The maximum output voltage VDDH (ie, the maximum envelope voltage) is supplied to the drain levels of the power amplifiers in the Doherty power amplifier circuit, and will not be described herein.
- the generated phase modulation control signal may specifically be a voltage signal; for example, it is assumed that the Doherty power amplifier circuit includes a main power amplifier, an auxiliary power amplifier, and a Doherty power amplifier is required.
- the signal of the auxiliary power amplifier link in the circuit is phase-modulated, then:
- the envelope modulator When the envelope signal is not greater than the set envelope turn-on threshold, the envelope modulator outputs a fixed voltage VDDL (ie, the minimum envelope voltage) to provide the drain level of each power amplifier in the Doherty power amplifier circuit, and at the same time, the power amplifier
- the control device ie, the execution body of each step of the embodiment of the present invention
- V0 the fixed voltage V0
- the phase of the auxiliary power amplifier link to be in the phase a state, that is,
- the phase difference between the main power amplifier link and the auxiliary power amplifier link of the Doherty power amplifier circuit is a
- the phase a is the optimum phase of the Doherty power amplifier circuit at the voltage VDDL;
- the voltage output from the envelope modulator will follow The envelope signal envelope changes, and the maximum envelope corresponds to the maximum output voltage VDDH (ie, the maximum envelope voltage).
- VDDH the maximum envelope voltage
- the voltage signal generated by the power amplifier control device according to the envelope signal output by the baseband unit also follows the change of the envelope.
- the voltage V1 output by the power amplifier control device causes the phase of the auxiliary power amplifier link to be in the phase b state, that is, between the main power amplifier link and the auxiliary power amplifier link of the Doherty power amplifier circuit
- the phase difference is b, which is the optimum phase of the Doherty power amplifier circuit at voltage VDDH; and when the envelope signal changes between the set envelope turn-on threshold and the set envelope signal maximum value
- the voltage generated by the power amplifier control device according to the envelope signal output by the baseband unit causes the phase of the auxiliary power amplifier link to follow the envelope signal to change linearly.
- the specific variation curve can be as shown in FIG. 5.
- the signal of the main power amplifier link and/or the auxiliary power amplifier link of the Doherty power amplifier circuit is phase-modulated according to the generated phase modulation control signal, as described in step 402, including:
- the signals of the main power amplifier link and/or the auxiliary power amplifier link of the Doherty power amplifier circuit are adjusted. Phase; or,
- the signals of the main power amplifier link and/or the auxiliary power amplifier link of the Doherty power amplifier circuit are adjusted. phase.
- the phase-modulating operation can be performed after the frequency conversion or before the frequency conversion, which is not limited in the embodiment of the present invention.
- the baseband signal generated by the baseband unit in the up-conversion device can be frequency-converted to obtain a multi-channel and Doherty power amplifier circuit.
- the RF signal corresponding to the auxiliary power amplifier link is phase-modulated; at this time, in order to simplify the system structure and reduce the number of up-conversion devices, the baseband unit can output only one baseband signal to the power amplifier system.
- the baseband signal corresponding to each power amplifier in the Doherty power amplifier circuit may be outputted, and is not limited herein; or
- the baseband signal generated by the baseband unit and required to be input to the auxiliary power amplifier link of the Doherty power amplifier circuit may also be adjusted before the upconversion device performs frequency conversion processing on the baseband signal generated by the baseband unit.
- the baseband unit can output a baseband signal corresponding to each power amplifier in the Doherty power amplifier circuit, or can output only two baseband signals, wherein one baseband signal corresponds to the main power amplifier link, The other baseband signal corresponds to all the auxiliary power amplifier links; in addition, it should be noted that the phase modulation of the baseband signal corresponding to the auxiliary power amplifier link can be completed in the process of generating the corresponding baseband signal by the baseband unit (that is, At this time, the power amplifier control device may be equivalent to being integrated in the baseband unit as a subunit of the baseband unit, or may be completed after the baseband unit generates the corresponding baseband signal and before the frequency conversion processing is performed on the baseband signal. Let me repeat.
- the number of auxiliary power amplifiers of the Doherty power amplifier circuit is one (as shown in FIG. 6) or multiple (as shown in FIG. 7); and, if the auxiliary power amplifier of the Doherty power amplifier circuit If there are multiple numbers, the signals of the auxiliary power amplifier link of the Doherty power amplifier circuit are phase-modulated, including:
- the signals of the auxiliary power amplifier links of the Doherty power amplifier circuit are phase-modulated.
- the Doherty power amplifier circuit includes a main power amplifier and N (N is a positive integer greater than 1) auxiliary power amplifiers, if the signal of the main power amplifier link of the Doherty power amplifier circuit and the auxiliary power amplifier chain are required.
- the signals of the road are phase-modulated
- the signals of the main power amplifier link are phase-modulated
- the signals of each auxiliary power amplifier link are phase-modulated, so that the signal of the main power amplifier link after phase modulation and each auxiliary
- the phase difference between the signals of the power amplifier link is a set value corresponding to the current value of the envelope signal, and details are not described herein again.
- the power amplifier circuit ie, the multi-stage Doherty power amplifier circuit
- the power amplifier circuit is used to achieve high power requirements, which will not be described in detail in the embodiments of the present invention.
- the number of envelope modulators in the envelope control circuit is one or more; and when the envelope modulator in the envelope control circuit is one, the envelope modulator can be
- the power amplifiers in the Doherty power amplifier circuit are respectively connected to output an envelope voltage to each power amplifier in the Doherty power amplifier circuit, as shown in FIG. 6 and FIG. 7;
- the envelope control circuit has a plurality of envelope modulators
- the envelope control circuit includes a plurality of envelope modulators connected in a one-to-one correspondence with each power amplifier in the Doherty power amplifier circuit.
- Each of the plurality of envelope modulators can be used to output an envelope voltage to a corresponding power amplifier in the Doherty power amplifier circuit, as shown in FIG.
- each of the plurality of envelope modulators may not only correspond to a single power amplifier but also Corresponding to multiple power amplifiers, it will not be described here.
- the Doherty power amplifier circuit described in the embodiment of the present invention may include, in addition to the main power amplifier and the auxiliary power amplifier, a driver for providing power to each power amplifier.
- the driving amplifier of the signal, and the related equipment such as the quarter-wavelength transmission line are not described here.
- phase modulation is digital phase modulation or analog phase modulation.
- the digital phase modulation may include QPSK (Quadrature Phase Shift Keying), etc.
- the analog phase modulation may include loop parameter phase shifting, RC network phase shifting, and variable delay method tuning, which is not Let me repeat.
- the mode of phase modulation can be flexibly selected according to actual needs, further improving the flexibility of power amplifier control.
- Embodiment 1 of the present invention provides a power amplifier control method, which is applicable to a power amplifier system including an envelope control circuit and a Doherty power amplifier circuit, which can generate a phase modulation control signal according to an envelope signal output from a baseband unit, and according to phase modulation
- the control signal modulates the signal of the main power amplifier link and/or the auxiliary power amplifier link of the Doherty power amplifier circuit, so that the phase difference between the signal of the phased main power amplifier link and the signal of the auxiliary power amplifier link is a set value corresponding to the current value of the envelope signal.
- the supply voltage of the Doherty power amplifier circuit is an envelope voltage corresponding to the current value of the envelope signal
- the Doherty power amplifier circuit is the most Good phase value.
- the main power amplifier link and/or the auxiliary power amplifier link can be phase compensated for different envelope voltages such that the phase difference between the main power amplifier link and the auxiliary power amplifier link is different at different envelope voltages.
- the optimal value can be achieved, so that the performance of Doherty's fallback efficiency can be fully utilized, and the function of the ET can be combined to improve the saturation power of the power amplifier, and the performance of the power amplifier can be further improved by adjusting the phase under different voltages.
- Existing high-efficiency power amplifier technology has problems such as poor performance and poor performance.
- Embodiment 2 is a diagrammatic representation of Embodiment 1:
- the second embodiment of the present invention provides a power amplifier control apparatus, which is applicable to a power amplifier system including an envelope control circuit and a Doherty power amplifier circuit, wherein the envelope control circuit An envelope modulator for generating an envelope voltage according to an envelope signal output from the baseband unit and outputting the power supply voltage to the Doherty power amplifier circuit;
- the Doherty power amplifier circuit includes a main power amplifier and an auxiliary power amplifier, the main power amplifier,
- the auxiliary power amplifiers are respectively used for amplifying the baseband signals output by the baseband unit according to the envelope voltage output by the envelope modulator.
- the apparatus may include:
- the signal generating unit 91 is configured to generate a phase modulation control signal according to the envelope signal output by the baseband unit;
- the signal modulating unit 92 can be configured to modulate the signals of the main power amplifier link and/or the auxiliary power amplifier link of the Doherty power amplifier circuit according to the phase modulation control signal generated by the signal generating unit 91, so that the main phase after phase modulation
- the phase difference between the signal of the power amplifier link and the signal of the auxiliary power amplifier link is a set value corresponding to the current value of the envelope signal, and the set value is a supply voltage of the Doherty power amplifier circuit and an envelope signal.
- the current value corresponds to the envelope voltage when the Doherty power amplifier circuit has the best phase value.
- the phase modulation control signal can be generated by the signal generation unit 91, and the phase modulation control signal can be output to the signal phase modulation unit 92 to the main power amplifier link and/or the auxiliary power amplifier link of the Doherty power amplifier circuit.
- the signal is phase-modulated such that the phase difference between the signal of the main power amplifier link of the Doherty power amplifier circuit and the signal of the auxiliary power amplifier link reaches the envelope voltage value of the Doherty power amplifier circuit corresponding to the current envelope signal.
- the best phase That is, the main power amplifier link and/or the auxiliary power amplifier link can be phase compensated for different envelope voltages such that the phase difference between the main power amplifier link and the auxiliary power amplifier link is different at different envelope voltages.
- the corresponding optimal value can be achieved, thereby improving the effect and performance of the power amplifier, and solving the problems of poor performance and poor performance of the existing high-efficiency power amplifier technology.
- the signal generating unit 91 is configured to generate a first phase modulation control signal according to the envelope signal if the current value of the envelope signal is determined not to be greater than a set envelope turn-on threshold;
- the first phase modulation control signal can make the phase difference between the signal of the phase-modulated main power amplifier link and the signal of the auxiliary power amplifier link be a first phase value, and the first phase value is a power supply of the Doherty power amplifier circuit.
- the optimum phase value of the Doherty power amplifier circuit when the voltage is the minimum envelope voltage; or
- the second phase modulation control signal enables the phased main power amplifier
- the phase difference between the signal of the link and the signal of the auxiliary power amplifier link is a second phase value, and the second phase value is a maximum envelope voltage of the Doherty power amplifier circuit, and the Doherty power amplifier circuit An optimal phase value; wherein the set envelope signal maximum value is greater than the set envelope turn-on threshold; or
- the third phase modulation control signal can be such that the phase difference between the phase-modulated main power amplifier link signal and the auxiliary power amplifier link signal is a third phase value; the third phase value is based on the current value of the envelope signal and the first phase value And the second phase value and the envelope opening threshold corresponding to the first phase value and the maximum envelope signal corresponding to the second phase value are linearly interpolated.
- the signal generating unit 91 can generate a signal such that the signal of the main power amplifier link and the auxiliary power amplifier link The phase difference between the two follows a phase modulation control signal that linearly changes the envelope signal.
- the reason why the first phase value is the minimum envelope voltage is the optimal phase value of the Doherty power amplifier circuit because the current value of the envelope signal is not greater than the set envelope turn-on threshold (The threshold can be flexibly adjusted according to the actual situation.
- VDDL ie, the minimum envelope voltage
- the second phase value is the optimum phase value of the Doherty power amplifier circuit when the maximum envelope voltage is because the power amplifier system operates at Doherty when the envelope signal is greater than the set envelope turn-on threshold.
- the output voltage of the envelope modulator follows the envelope signal envelope change.
- the envelope modulator outputs a The maximum output voltage VDDH (ie, the maximum envelope voltage) is supplied to the drain levels of the power amplifiers in the Doherty power amplifier circuit, and will not be described herein.
- the signal phase modulating unit 92 is specifically configured to perform frequency conversion processing on the baseband signal corresponding to the main power amplifier link and/or the auxiliary power amplifier link of the Doherty power amplifier circuit, and then to the Doherty power amplifier circuit.
- the signals of the main power amplifier link and/or the auxiliary power amplifier link are phase-modulated; or,
- the signals of the main power amplifier link and/or the auxiliary power amplifier link of the Doherty power amplifier circuit are adjusted. phase.
- the phase-modulating operation can be performed after the frequency conversion or before the frequency conversion, which is not limited in the embodiment of the present invention.
- the signal of the auxiliary power amplifier link in the Doherty power amplifier circuit needs to be phase-modulated, and the baseband signal generated by the baseband unit can be frequency-converted by the up-conversion device to obtain multiple channels and multiple signals.
- the RF signals of the power amplifiers in the Heidi power amplifier circuit are one-to-one, the RF signals corresponding to the auxiliary power amplifier links are phase-modulated; at this time, in order to simplify the system structure and reduce the number of up-conversion devices, the baseband unit can output only one channel.
- the baseband signal is sent to the power amplifier system.
- the baseband signal corresponding to each power amplifier in the Doherty power amplifier circuit can also be output, which is not limited herein; or
- the baseband signal generated by the baseband unit that needs to be input to the auxiliary power amplifier link of the Doherty power amplifier circuit is phase-modulated;
- the baseband unit can output a baseband signal corresponding to each power amplifier in the Doherty power amplifier circuit, or can output only two baseband signals, wherein one baseband signal corresponds to the main power amplifier link, and the other baseband signal Corresponding to all auxiliary power amplifier links; in addition, it should be noted that the phase modulation of the baseband signal corresponding to the auxiliary power amplifier link can be completed in the process of generating the corresponding baseband signal by the baseband unit (that is, at this time, the power amplifier
- the control device may be integrated in the baseband unit as a subunit of the baseband unit, or may be completed after the baseband unit generates the corresponding baseband signal and before the frequency conversion processing is performed on the baseband signal, and details are not described herein again.
- the number of the auxiliary power amplifiers of the Doherty power amplifier circuit is one or more; the signal phase modulation unit 92 is specifically configured to: when the number of auxiliary power amplifiers of the Doherty power amplifier circuit is multiple When the signal of the auxiliary power amplifier link of the Doherty power amplifier circuit needs to be phase-modulated, the signals of the auxiliary power amplifier links of the Doherty power amplifier circuit are phase-modulated.
- the Doherty power amplifier circuit includes a main power amplifier and N (N is a positive integer greater than 1) auxiliary power amplifiers, if the signal of the main power amplifier link of the Doherty power amplifier circuit and the auxiliary power amplifier chain are required.
- the signals of the road are phase-modulated
- the signals of the main power amplifier link are phase-modulated
- the signals of each auxiliary power amplifier link are phase-modulated, so that the signal of the main power amplifier link after phase modulation and each auxiliary
- the phase difference between the signals of the power amplifier link is a set value corresponding to the current value of the envelope signal, and details are not described herein again.
- the power amplifier circuit ie, the multi-stage Doherty power amplifier circuit
- the power amplifier circuit is used to achieve high power requirements, which will not be described in detail in the embodiments of the present invention.
- the signal generating unit 91 may include one or more small signal modulators; the signal phase modulating unit 92 may include one or more phase modulation circuits.
- the signal generating unit 91 may include a small signal modulator
- the signal phase modulating unit 92 may include a phase modulation circuit corresponding to the small signal modulator, the small signal modulator for generating a packet according to the baseband unit.
- the phase modulation circuit is configured to adjust a phase of the corresponding power amplifier link to a set phase according to the phase modulation control signal output by the small signal modulator;
- the signal generating unit 91 may include a first sub-phase modulation control corresponding to the main power amplifier link. a first small signal modulator of the signal, and a second small signal modulator for generating a second sub-phase modulation control signal corresponding to the auxiliary power amplifier link;
- the signal phase modulating unit 92 can include the first small signal a first phase modulation circuit corresponding to the modulator for adjusting a phase of a signal corresponding to the main power amplifier link to the first subphase, and a corresponding to the second small signal modulator for assisting The phase of the signal corresponding to the power amplifier link is adjusted to the second phase modulation circuit of the second sub-phase, wherein the phase difference between the first sub-phase and the second sub-phase is a set value.
- the signal generating unit 91 The plurality of small signal modulators (such as the small signal modulator 1 to the small signal modulator N shown in FIG. 14) respectively corresponding to the plurality of auxiliary power amplifiers may be included, and the signal phase modulation unit 92 may include a plurality of respectively A phase modulation circuit (such as the phase modulation circuit 1 to the phase modulation circuit N shown in FIG. 14) corresponding to the plurality of auxiliary power amplifiers will not be described herein.
- the number of small signal modulators in the signal generating unit 91 and the number of phase modulation circuits in the signal phase modulating unit 92 can be flexibly set according to actual conditions, as long as the main power amplifier in the Doherty power amplifier circuit can be ensured.
- the phase difference between the signal of the link and the signal of the auxiliary power amplifier link may be set values, and details are not described herein.
- the number of envelope modulators in the envelope control circuit is one or more; and when the envelope modulator in the envelope control circuit is one, the envelope modulator can be Each power amplifier in the Doherty power amplifier circuit is respectively connected to output an envelope voltage to each power amplifier in the Doherty power amplifier circuit, as shown in FIG. 7; or
- the envelope control circuit has a plurality of envelope modulators
- the envelope control circuit includes a plurality of envelope modulators connected in a one-to-one correspondence with each power amplifier in the Doherty power amplifier circuit.
- Each of the plurality of envelope modulators can be used to output an envelope voltage to a corresponding power amplifier in the Doherty power amplifier circuit, as shown in FIG.
- each of the plurality of envelope modulators may be configured to correspond to only one power amplifier. It can also correspond to multiple power amplifiers, which will not be described here.
- phase modulation is digital phase modulation or analog phase modulation.
- the digital phase modulation may include QPSK (Quadrature Phase Shift Keying), etc.
- the analog phase modulation may include loop parameter phase shifting, RC network phase shifting, and variable delay method tuning, which is not Let me repeat.
- the modulation method can be flexibly selected according to actual needs, and the flexibility of the power amplifier control is further improved.
- the power amplifier control apparatus described in the embodiments of the present invention may generally exist independently of equipment such as a baseband unit; of course, it may be integrated in the baseband unit in addition to being independent of equipment such as a baseband unit. Internally, it exists as a subunit of the baseband unit, as shown in FIG. 11, and details are not described herein.
- Embodiment 3 is a diagrammatic representation of Embodiment 3
- the third embodiment of the present invention further provides another power amplifier control device, which is applicable to a power amplifier system including an envelope control circuit and a Doherty power amplifier circuit, where
- the envelope control circuit includes an envelope modulator for generating an envelope voltage according to an envelope signal output by the baseband unit and outputting the power supply voltage to the Doherty power amplifier circuit;
- the Doherty power amplifier circuit includes a main power amplifier and an auxiliary power amplifier The main power amplifier and the auxiliary power amplifier are respectively used for amplifying the baseband signal outputted by the baseband unit according to the envelope voltage output by the envelope modulator.
- the apparatus may include:
- the signal generator 151 is configured to generate a phase modulation control signal according to the envelope signal output by the baseband unit;
- the signal modulator 152 can be configured to modulate the signals of the main power amplifier link and/or the auxiliary power amplifier link of the Doherty power amplifier circuit according to the phase modulation control signal generated by the signal generator 151, so that the main power amplifier after phase modulation
- the phase difference between the signal of the link and the signal of the auxiliary power amplifier link is a set value corresponding to the current value of the envelope signal, and the set value is the supply voltage of the Doherty power amplifier circuit and the envelope signal.
- the phase modulation control signal can be generated by the signal generator 151, and the phase modulation control signal can be output to the signal modulator 152 to the main power amplifier link and/or the auxiliary power amplifier link of the Doherty power amplifier circuit.
- the signal is phase-modulated so that the phase difference between the signal of the main power amplifier link of the Doherty power amplifier circuit and the signal of the auxiliary power amplifier link reaches the maximum value of the envelope voltage corresponding to the current envelope signal of the Doherty power amplifier circuit.
- Good phase That is, the main power amplifier link and/or the auxiliary power amplifier link can be phase compensated for different envelope voltages such that the phase difference between the main power amplifier link and the auxiliary power amplifier link is different at different envelope voltages.
- the corresponding optimal value can be achieved, thereby improving the effect and performance of the power amplifier, and solving the problems of poor performance and poor performance of the existing high-efficiency power amplifier technology.
- the signal generator 151 is configured to generate a first phase modulation control signal according to the envelope signal if the current value of the envelope signal is determined not to be greater than a set envelope turn-on threshold;
- the first phase modulation control signal can make the phase difference between the signal of the phase-modulated main power amplifier link and the signal of the auxiliary power amplifier link be a first phase value, and the first phase value is a power supply of the Doherty power amplifier circuit.
- the optimum phase value of the Doherty power amplifier circuit when the voltage is the minimum envelope voltage; or
- the second phase modulation control signal enables the phased main power amplifier
- the phase difference between the signal of the link and the signal of the auxiliary power amplifier link is a second phase value, and the second phase value is a maximum envelope voltage of the Doherty power amplifier circuit, and the Doherty power amplifier circuit An optimal phase value; wherein the set envelope signal maximum value is greater than the set envelope turn-on threshold; or
- the third phase modulation control signal can be such that the phase difference between the phase-modulated main power amplifier link signal and the auxiliary power amplifier link signal is a third phase value; the third phase value is based on the current value of the envelope signal and the first phase value And the second phase value and the envelope opening threshold corresponding to the first phase value and the maximum envelope signal corresponding to the second phase value are linearly interpolated.
- the signal generator 151 can generate a signal such that the signal of the main power amplifier link and the auxiliary power amplifier link The phase difference between the two follows a phase modulation control signal that linearly changes the envelope signal.
- the reason why the first phase value is the minimum envelope voltage is the optimal phase value of the Doherty power amplifier circuit because the current value of the envelope signal is not greater than the set envelope turn-on threshold (The threshold can be flexibly adjusted according to the actual situation.
- VDDL ie, the minimum envelope voltage
- the reason why the second phase value is the maximum envelope voltage is the optimum phase value of the Doherty power amplifier circuit because the power amplifier system works when the envelope signal is greater than the set envelope turn-on threshold.
- the output voltage of the envelope modulator follows the envelope signal envelope change.
- the envelope modulator will A maximum output voltage VDDH (ie, the maximum envelope voltage) is output to the drain levels of the power amplifiers in the Doherty power amplifier circuit, and will not be described here.
- the signal modulator 152 is specifically configured to: after performing frequency conversion processing on the baseband signal corresponding to the main power amplifier link of the Doherty power amplifier circuit and/or the auxiliary power amplifier link, the main body of the Doherty power amplifier circuit
- the signals of the power amplifier link and/or the auxiliary power amplifier link are phase-modulated; or,
- the signals of the main power amplifier link and/or the auxiliary power amplifier link of the Doherty power amplifier circuit are adjusted. phase.
- the phase-modulating operation can be performed after the frequency conversion or before the frequency conversion, which is not limited in the embodiment of the present invention.
- the baseband signal generated by the baseband unit in the up-conversion device can be frequency-converted to obtain a multi-channel and Doherty power amplifier circuit.
- the RF signal corresponding to the auxiliary power amplifier link is phase-modulated; at this time, in order to simplify the system structure and reduce the number of up-conversion devices, the baseband unit can output only one baseband signal to the power amplifier system.
- the baseband signal corresponding to each power amplifier in the Doherty power amplifier circuit may be outputted, and is not limited herein; or
- the baseband signal generated by the baseband unit that needs to be input to the auxiliary power amplifier link of the Doherty power amplifier circuit is phase-modulated; at this time, the baseband unit can output more The baseband signal corresponding to each power amplifier in the Doherty power amplifier circuit, or only two baseband signals may be output, one of the baseband signals corresponding to the main power amplifier link, and the other baseband signal and all the auxiliary power amplifier chains
- the phase modulation of the baseband signal corresponding to the auxiliary power amplifier link can be completed in the process of generating the corresponding baseband signal by the baseband unit (that is, at this time, the power amplifier control device can be equivalent to integration.
- the baseband unit as a subunit of the baseband unit, it may be completed after the baseband unit generates the corresponding baseband signal and before the frequency conversion processing is performed on the baseband signal, and details are not described herein again.
- the number of auxiliary power amplifiers of the Doherty power amplifier circuit is one or more; and the signal modulator 152 is specifically configured to: when the number of auxiliary power amplifiers of the Doherty power amplifier circuit is multiple, When the signal of the auxiliary power amplifier link of the Doherty power amplifier circuit needs to be phase-modulated, the signals of the auxiliary power amplifier links of the Doherty power amplifier circuit are phase-modulated.
- the Doherty power amplifier circuit includes a main power amplifier and N (N is a positive integer greater than 1) auxiliary power amplifiers, if the signal of the main power amplifier link of the Doherty power amplifier circuit and the auxiliary power amplifier chain are required.
- the signals of the road are phase-modulated
- the signals of the main power amplifier link are phase-modulated
- the signals of each auxiliary power amplifier link are phase-modulated, so that the signal of the main power amplifier link after phase modulation and each auxiliary
- the phase difference between the signals of the power amplifier link is a set value corresponding to the current value of the envelope signal, and details are not described herein again.
- the power amplifier circuit ie, the multi-stage Doherty power amplifier circuit
- the power amplifier circuit is used to achieve high power requirements, which will not be described in detail in the embodiments of the present invention.
- the signal generator 151 may include one or more small signal modulators; the signal modulator 152 may include one or more phase modulation circuits.
- the signal generator 151 may include a small signal modulator, and the signal modulator 152 may include a phase modulation circuit corresponding to the small signal modulator, the small signal modulator is configured to generate a phase modulation control signal according to an envelope signal generated by the baseband unit, and output the signal to the phase modulation circuit; the phase modulation circuit is used to The phase modulation control signal output by the signal modulator adjusts the phase of the corresponding power amplifier link to a set phase; or
- the signal generator 151 may include a first small signal for generating a first sub-phase modulation control signal corresponding to the main power amplifier link. a modulator, and a second small signal modulator for generating a second sub-phase modulation control signal corresponding to the auxiliary power amplifier link;
- the signal modulator 152 may comprise a corresponding one of the first small signal modulators Adjusting the phase of the signal corresponding to the main power amplifier link to the first subphase a phase modulation circuit, and a second phase modulation circuit corresponding to the second small signal modulator for adjusting a phase of the signal corresponding to the auxiliary power amplifier link to the second subphase, wherein the first subphase The phase difference from the second sub-phase is a set value.
- the signal generator 151 may include a plurality of small-signal modulators respectively corresponding to the plurality of auxiliary power amplifiers, and signal modulation.
- the 152 may include a plurality of phase modulation circuits respectively corresponding to the plurality of auxiliary power amplifiers, and details are not described herein again.
- the number of small signal modulators in the signal generator 151 and the number of phase modulation circuits in the signal modulator 152 can be flexibly set according to actual conditions, as long as the main power amplifier chain in the Doherty power amplifier circuit can be guaranteed.
- the phase difference between the signal of the road and the signal of the auxiliary power amplifier link may be set values, and details are not described herein.
- the number of envelope modulators in the envelope control circuit is one or more; and when the envelope modulator in the envelope control circuit is one, the envelope modulator can be Each power amplifier in the Doherty power amplifier circuit is respectively connected to output an envelope voltage to each power amplifier in the Doherty power amplifier circuit, as shown in FIG. 7; or
- the envelope control circuit has a plurality of envelope modulators
- the envelope control circuit includes a plurality of envelope modulators connected in a one-to-one correspondence with each power amplifier in the Doherty power amplifier circuit.
- Each of the plurality of envelope modulators can be used to output an envelope voltage to a corresponding power amplifier in the Doherty power amplifier circuit, as shown in FIG.
- each of the plurality of envelope modulators may be configured to correspond to only one power amplifier. It can also correspond to multiple power amplifiers, which will not be described here.
- phase modulation is digital phase modulation or analog phase modulation.
- the digital phase modulation may include QPSK (Quadrature Phase Shift Keying), etc.
- the analog phase modulation may include loop parameter phase shifting, RC network phase shifting, and variable delay method tuning, which is not Let me repeat.
- the modulation method can be flexibly selected according to actual needs, and the work can be further improved.
- the power amplifier control apparatus described in the embodiments of the present invention may generally exist independently of equipment such as a baseband unit; of course, it may be integrated in the baseband unit in addition to being independent of equipment such as a baseband unit. It exists internally and as a subunit of the baseband unit, and will not be described in detail.
- Embodiment 4 is a diagrammatic representation of Embodiment 4:
- Embodiment 4 of the present invention provides a power amplifier control system, including a power amplifier system including an envelope control circuit and a Doherty power amplifier circuit, wherein the envelope control circuit includes a packet for generating an envelope signal according to a baseband unit output. The voltage is output as a supply voltage to an envelope modulator of the Doherty power amplifier circuit; the Doherty power amplifier circuit includes a main power amplifier and an auxiliary power amplifier, and the main power amplifier and the auxiliary power amplifier are respectively used for a packet output according to the envelope modulator
- the power amplifier control system further includes a power amplifier control device according to the second embodiment of the present invention, or a power amplifier control device according to the third embodiment of the present invention. Do not repeat them.
- the power amplifier control system described in the embodiment of the present invention includes, in addition to the power amplifier system including the envelope control circuit and the Doherty power amplifier circuit, the second embodiment of the present invention, or the present invention.
- a baseband unit for generating a baseband signal and a corresponding envelope signal, and an upconverter for frequency-converting the baseband signal may be further included.
- embodiments of the present invention can be provided as a method, apparatus (device), or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
- a computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
- the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
- the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
- These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
- the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
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Abstract
Description
Claims (13)
- 一种功放控制方法,适用于包括包络控制电路以及多赫蒂功放电路的功放系统,其中,所述包络控制电路包括用于根据基带单元输出的包络信号生成包络电压并作为供电电压输出至多赫蒂功放电路的包络调制器;所述多赫蒂功放电路包括主功放以及辅助功放,所述主功放、辅助功放分别用于根据包络调制器输出的包络电压,对基带单元输出的基带信号进行放大处理,其特征在于,所述方法包括:根据基带单元输出的包络信号,生成调相控制信号;根据生成的调相控制信号,对多赫蒂功放电路的主功放链路和/或辅助功放链路的信号进行调相,使得调相后的主功放链路的信号和辅助功放链路的信号之间的相位差为与包络信号的当前值相对应的设定值,该设定值为多赫蒂功放电路的供电电压为与包络信号的当前值相对应的包络电压时,多赫蒂功放电路的最佳相位值。
- 如权利要求1所述的控制方法,其特征在于,根据基带单元输出的包络信号,生成调相控制信号,包括:若确定包络信号的当前值不大于设定的包络开启阈值,则根据所述包络信号,生成第一调相控制信号;所述第一调相控制信号能够使得调相后的主功放链路的信号和辅助功放链路的信号之间的相位差为第一相位值,所述第一相位值为多赫蒂功放电路的供电电压为最小包络电压时,多赫蒂功放电路的最佳相位值;或者,若确定包络信号的当前值为设定的包络信号最大值,则根据所述包络信号,生成第二调相控制信号;所述第二调相控制信号能够使得调相后的主功放链路的信号和辅助功放链路的信号之间的相位差为第二相位值,所述第二相位值为多赫蒂功放电路的供电电压为最大包络电压时,多赫蒂功放电路的最佳相位值;其中,所述设定的包络信号最大值大于所述设定的包络开启阈值;或者,若确定包络信号的当前值大于设定的包络开启阈值且小于设定的包络信号最大值,则根据所述包络信号,生成第三调相控制信号;所述第三调相控制信号能够使得调相后的主功放链路的信号和辅助功放链路的信号之间的相位差为第三相位值;所述第三相位值是根据包络信号的当前值、第一相位值、第二相位值以及第一相位值对应的包络开启阈值、第二相位值对应的包络信号最大值进行线性插值运算得到的。
- 如权利要求1所述的控制方法,其特征在于,根据生成的调相控制信号,对多赫蒂功放电路的主功放链路和/或辅助功放链路的信号进行调相,包括:在对多赫蒂功放电路的主功放链路和/或辅助功放链路对应的基带信号进行变频处理之后,对多赫蒂功放电路的主功放链路和/或辅助功放链路的信号进行调相;或者,在对多赫蒂功放电路的主功放链路和/或辅助功放链路对应的基带信号进行变频处理之前,对多赫蒂功放电路的主功放链路和/或辅助功放链路的信号进行调相。
- 如权利要求1所述的控制方法,其特征在于,所述多赫蒂功放电路的辅助功放的个数为一个或多个;且,若所述多赫蒂功放电路的辅助功放的个数为多个,则对所述多赫蒂功放电路的辅助功放链路的信号进行调相,包括:对所述多赫蒂功放电路的各辅助功放链路的信号均进行调相。
- 如权利要求1所述的控制方法,其特征在于,所述包络控制电路包括与所述多赫蒂功放电路中的各功放分别相连的一个包络调制器,所述一个包络调制器用于向多赫蒂功放电路中的各功放输出包络电压;或者,包括与多赫蒂功放电路中的各功放一一对应相连的多个包络调制器,所述多个包络调制器中的每一包络调制器用于向多赫蒂功放电路中的对应的功放输出包络电压。
- 如权利要求1所述的控制方法,其特征在于,所述调相为数字调相或模拟调相。
- 一种功放控制装置,适用于包括包络控制电路以及多赫蒂功放电路的功放系统,其中,所述包络控制电路包括用于根据基带单元输出的包络信号生成包络电压并作为供电电压输出至多赫蒂功放电路的包络调制器;所述多赫蒂功放电路包括主功放以及辅助功放,所述主功放、辅助功放分别用于根据包络调制器输出的包络电压,对基带单元输出的基带信号进行放大处理,其特征在于,所述装置包括:信号生成单元,用于根据基带单元输出的包络信号,生成调相控制信号;信号调相单元,用于根据生成的调相控制信号,对多赫蒂功放电路的主功放链路和/或辅助功放链路的信号进行调相,使得调相后的主功放链路的信号和辅助功放链路的信号之间的相位差为与包络信号的当前值相对应的设定值,该设定值为多赫蒂功放电路的供电电压为与包络信号的当前值相对应的包络电压时,多赫蒂功放电路的最佳相位值。
- 如权利要求7所述的控制装置,其特征在于,所述信号生成单元,具体用于若确定包络信号的当前值不大于设定的包络开启阈值,则根据所述包络信号,生成第一调相控制信号;所述第一调相控制信号能够使得调相后的主功放链路的信号和辅助功放链路的信号之间的相位差为第一相位值,所述第一相位值为多赫蒂功放电路的供电电压为最小包络电压时,多赫蒂功放电路的最佳相位值;或者,若确定包络信号的当前值为设定的包络信号最大值,则根据所述包络信号,生成第二调相控制信号;所述第二调相控制信号能够使得调相后的主功放链路的信号和辅助功放链路的信号之间的相位差为第二相位值,所述第二相位值为多赫蒂功放电路的供电电压为最大包络电压时,多赫蒂功放电路的最佳相位值;其中,所述设定的包络信号最大值大于所述设定的包络开启阈值;或者,若确定包络信号的当前值大于设定的包络开启阈值且小于设定的包络信号最大值,则根据所述包络信号,生成第三调相控制信号;所述第三调相控制信号能够使得调相后的主功放链路的信号和辅助功放链路的信号之间的相 位差为第三相位值;所述第三相位值是根据包络信号的当前值、第一相位值、第二相位值以及第一相位值对应的包络开启阈值、第二相位值对应的包络信号最大值进行线性插值运算得到的。
- 如权利要求7所述的控制装置,其特征在于,所述信号调相单元,具体用于在对多赫蒂功放电路的主功放链路和/或辅助功放链路对应的基带信号进行变频处理之后,对多赫蒂功放电路的主功放链路和/或辅助功放链路的信号进行调相;或者,在对多赫蒂功放电路的主功放链路和/或辅助功放链路对应的基带信号进行变频处理之前,对多赫蒂功放电路的主功放链路和/或辅助功放链路的信号进行调相。
- 如权利要求7所述的控制装置,其特征在于,所述多赫蒂功放电路的辅助功放的个数为一个或多个;所述信号调相单元,具体用于当所述多赫蒂功放电路的辅助功放的个数为多个,且需对所述多赫蒂功放电路的辅助功放链路的信号进行调相时,对所述多赫蒂功放电路的各辅助功放链路的信号均进行调相。
- 如权利要求7所述的控制装置,其特征在于,所述包络控制电路包括与所述多赫蒂功放电路中的各功放分别相连的一个包络调制器,所述一个包络调制器用于向多赫蒂功放电路中的各功放输出包络电压;或者,包括与多赫蒂功放电路中的各功放一一对应相连的多个包络调制器,所述多个包络调制器中的每一包络调制器用于向多赫蒂功放电路中的对应的功放输出包络电压。
- 如权利要求7所述的控制装置,其特征在于,所述调相为数字调相或模拟调相。
- 一种功放控制系统,包括包含包络控制电路以及多赫蒂功放电路的功放系统,其中,所述包络控制电路包括用于根据基带单元输出的包络信号生成包络电压并作为供电电压输出至多赫蒂功放电路的包络调制器;所述多赫蒂功放电路包括主功放以及辅助功放,所述主功放、辅助功放分别用于根 据包络调制器输出的包络电压,对基带单元输出的基带信号进行放大处理,其特征在于,所述功放控制系统还包括权利要求7~12任一所述的功放控制装置。
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CN103178786A (zh) * | 2011-12-26 | 2013-06-26 | 瑞典爱立信有限公司 | 多路Doherty放大器 |
CN103430603A (zh) * | 2013-02-04 | 2013-12-04 | 华为技术有限公司 | 功率放大器、收发信机及基站 |
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EP3386102B1 (en) | 2021-03-31 |
CN108432129B (zh) | 2020-10-09 |
BR112018012904B1 (pt) | 2023-12-19 |
EP3386102A1 (en) | 2018-10-10 |
EP3386102A4 (en) | 2018-12-19 |
US10511266B2 (en) | 2019-12-17 |
BR112018012904A2 (zh) | 2018-12-11 |
JP2019504555A (ja) | 2019-02-14 |
JP6751147B2 (ja) | 2020-09-02 |
US20180302042A1 (en) | 2018-10-18 |
CN108432129A (zh) | 2018-08-21 |
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