WO2019119436A1 - 一种信号处理电路、射频信号发射机和通信设备 - Google Patents

一种信号处理电路、射频信号发射机和通信设备 Download PDF

Info

Publication number
WO2019119436A1
WO2019119436A1 PCT/CN2017/118071 CN2017118071W WO2019119436A1 WO 2019119436 A1 WO2019119436 A1 WO 2019119436A1 CN 2017118071 W CN2017118071 W CN 2017118071W WO 2019119436 A1 WO2019119436 A1 WO 2019119436A1
Authority
WO
WIPO (PCT)
Prior art keywords
power amplifier
signal
branch
port
output
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2017/118071
Other languages
English (en)
French (fr)
Inventor
孙捷
高严
曾志雄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
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 Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to PCT/CN2017/118071 priority Critical patent/WO2019119436A1/zh
Priority to EP17935244.8A priority patent/EP3720004B1/en
Priority to BR112020012575-0A priority patent/BR112020012575A2/pt
Priority to CN201780097831.7A priority patent/CN111566940B/zh
Publication of WO2019119436A1 publication Critical patent/WO2019119436A1/zh
Priority to US16/908,321 priority patent/US11444362B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/32—Non-reciprocal transmission devices
    • H01P1/38—Circulators
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/12—Coupling devices having more than two ports
    • H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
    • H01P5/19—Conjugate devices, i.e. devices having at least one port decoupled from one other port of the junction type
    • H01P5/22—Hybrid ring junctions
    • 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
    • H03F1/0294—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers using vector summing of two or more constant amplitude phase-modulated signals
    • 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
    • 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
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/198—A hybrid coupler being used as coupling circuit between stages of an amplifier 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

Definitions

  • the present application relates to the field of electronic device technologies, and in particular, to a signal processing circuit, a radio frequency signal transmitter, and a communication device.
  • the peak-to-average ratio of the signal is very high, generally above 8 dB, and even more than 10 dB. Therefore, a power amplifier (PA, referred to as a power amplifier) requiring an RF signal transmitter works at a large level. In the power back state. For traditional Class AB power amplifiers, their efficiency drops rapidly when power is backed up. The traditional 2-way Doherty Doherty can maintain relatively high efficiency within 6dB of power backoff.
  • PA power amplifier
  • the 2-way ADoherty (asymmetric Doherty) technology can achieve high efficiency operation with power backoff of more than 6dB, but
  • the efficiency curve in the power back-off range shows an obvious "efficiency recessed area", and the larger the range of power back-off, the larger the recess of the "efficiency recessed area”, and the lower the working efficiency of the power amplifier.
  • the prior art provides an isolated end load traction technology, wherein the power splitter 3 divides the RF input signal received by the power amplifier input terminal 1 into two signals; one output terminal of the power splitter 3 is connected to the main
  • the power amplifier 4 has another output terminal connected to the sub power amplifier 5, and the sub power amplifier 5 operates only when the power divider 3 has a high level output signal.
  • the output signal of the secondary power amplifier 5 is injected through the circulator 6 to the output of the main power amplifier 4, and the output signal of the main power amplifier 4 is injected through the circulator 6 to the output terminal 2.
  • the main power amplifier of the prior art scheme uses a class AB power amplifier, and the secondary power amplifier uses a class C power amplifier.
  • the main power amplifier needs to be in a large load traction ratio. Under the work, at this time, the efficiency of the main power amplifier will drop sharply, resulting in a low overall efficiency of the power amplifier.
  • a power amplifier input terminal 1 is adopted, and the RF input signal is divided into two signals through the power divider 3 to be input to the main power amplifier and the auxiliary power amplifier, and the phase and amplitude adjustment strengths of the main and auxiliary signals are limited.
  • the power amplifier has limited load pulling effect on the main power amplifier, the power back-off amount is small, and the power amplification efficiency is low.
  • Embodiments of the present application provide a signal processing circuit, a radio frequency signal transmitter, and a communication device, which can improve the efficiency of power amplification of a signal processing circuit.
  • a signal processing circuit including: a shunt module, a radio frequency signal conversion module, a first branch power amplifier, a second branch power amplifier, and a combining module; the shunt module is connected to the radio frequency signal conversion module, and the radio frequency
  • the signal conversion module is connected to the first branch power amplifier and the second branch power amplifier, and the first branch power amplifier and the second branch power amplifier are connected to the combining module; wherein the branching module is configured to receive the first digital signal, Dividing the first digital signal into at least one first branch digital signal and at least one second branch digital signal according to the input power of the first digital signal, and outputting at least one first branch digital signal and at least one second branch digital signal And for the RF signal conversion module, the ratio of the amplitude of the at least one first branch digital signal and the amplitude of the at least one second branch digital signal varies with the input power of the first digital signal, and/or at least one of the first branch digital signals And the phase difference of the digital signal of the at least one second branch
  • the branching module can divide the first digital signal into at least one first branch digital signal and at least one second branch digital signal according to the input power of the first digital signal
  • the radio frequency signal conversion module can enable at least one first branch
  • the road digital signal and the at least one second branch digital signal are converted into at least one first branch RF signal and at least one second branch RF signal and output; and at least one of the first branch digital signals has an amplitude and at least one second
  • the ratio of the amplitude of the digital signal of the branch varies with the input power of the first digital signal, and/or the phase difference of at least one of the first branch digital signal and the at least one second branch digital signal varies with the input power of the first digital signal
  • the at least one first branch RF signal entering the first branch power amplifier and the at least one second branch RF signal entering the second branch power amplifier are independently adjusted, so that the two branch power amplifiers can be received by adjusting
  • the phase and amplitude of each RF signal in the RF signal satisfy the output effect of the signal processing circuit The rate is
  • the digital signal is split by the shunt module, so that accurate signal amplitude and/or phase adjustment can be realized, so that the adjustment of the radio frequency signal entering the two branch power amplifiers is more accurate, thereby more accurately matching the power.
  • the working area of the amplifier further enhances the efficiency of the power amplifier.
  • the first branch power amplifier includes a first signal splitter and at least two first sub-power amplifiers connected to the first signal splitter; the input of the first signal splitter is The RF signal conversion module receives a first branch RF signal, and at least two outputs of the first signal separator are respectively connected to a first sub power amplifier; the first signal separator is configured to separate the first branch RF signal into At least two RF signals are output and output.
  • the second branch power amplifier includes a second signal splitter and at least two second sub-power amplifiers connected to the second signal splitter; the input of the second signal splitter is The RF signal conversion module receives a second branch RF signal, and at least two outputs of the second signal separator are respectively connected to a second sub power amplifier; and the second signal separator is configured to separate the second branch RF signal into At least two RF signals are output and output.
  • the first branch power amplifier includes at least one first sub power amplifier, and an input end of any one of the at least one first sub power amplifier is connected to the RF signal conversion module to receive The first branch of the radio signal.
  • the second branch power amplifier includes at least one second sub power amplifier, and the input of any one of the at least one second sub power amplifier is connected to the RF signal conversion module to receive The second branch of the radio signal.
  • the combining module includes a three-port device; the first branch power amplifier includes an output port; and the second branch power amplifier includes an output port; wherein the first port of the three-port device is connected An output port of a power amplifier, the first branch power amplifier is specifically configured to amplify the output of the received at least one first branch RF signal to the first port of the three-port device; the third port of the three-port device is connected The output port of the two-way power amplifier, the second branch power amplifier is specifically configured to amplify and output the received at least one second branch RF signal to the third port of the three-port device; the three-port device is used according to the third The signal received by the port adjusts the signal received by the first port and is output through the second port of the three-port device.
  • the three-port device includes a circulator.
  • the three-port device includes a first isolator and a second isolator; an input of the first isolator is coupled to the first port of the three-port device, and an output of the first isolator is coupled to the second port of the three-port device; The input of the isolator is connected to the third port of the three-port device; the output of the second isolator is connected to the first port of the three-port device; and the second isolator is used to transmit the signal received by the third port of the three-port device to the first port An input of the isolator; the first isolator is configured to adjust a signal received by the first port of the three-port device according to a signal received by the third port of the three-port device, and output through the second port of the three-port device.
  • the combining module includes a four-port device; the first branch power amplifier includes a first output port and a second output port; and the second branch power amplifier includes an output port; the first branch power The first output port of the amplifier is connected to the first port of the four-port device; the second output port of the first branch power amplifier is connected to the second port of the four-port device; and the output port of the second branch power amplifier is connected to the fourth port of the fourth port device a three-port; the first branch power amplifier is specifically configured to receive at least two first-channel RF signals, and respectively amplify and output the received at least two first RF signals to the first port and the second port of the four-port device;
  • the second branch power amplifier is specifically configured to amplify and output the received at least one second RF signal to a third port of the four-port device; the four-port device is configured to receive the signal received by the first port according to the signal received by the third port, and The signal received by the second port is adjusted, and the signal received by the adjusted first port and the signal received by the second port are combined and output to the fourth port of the four-port device.
  • the four-port device includes at least one of a squirrel-cage coupler, a rat-race, and a bridge.
  • the first branch power amplifier includes at least one of the following types of power amplifiers: a single-tube amplifier power amplifier, a Doherty Doherty power amplifier, a Chirex Chireix power amplifier, and a different phase. Outphasing power amplifier, envelope tracking ET power amplifier.
  • the second branch power amplifier includes at least one of the following types of power amplifiers: a single-tube amplifier power amplifier, a Doherty power amplifier, a Chireix power amplifier, an Outphasing power amplifier, and an ET power amplifier.
  • the first branch power amplifier includes a Doherty power amplifier
  • the second branch power amplifier includes a Doherty power amplifier.
  • the first branch power amplifier adopts the Doherty power amplifier to further reduce the load pull ratio of the first branch power amplifier under power retraction, and can further improve the first branch power amplifier when the power is retracted.
  • the work efficiency improves the efficiency of the signal processing circuit when the power is retracted.
  • the second branch power amplifier adopts a Doherty power amplifier to further improve the working efficiency of the signal processing circuit under high power back-off.
  • a radio frequency signal transmitter comprising: any of the signal processing circuits described above.
  • a communication device comprising: the radio frequency signal transmitter described above.
  • FIG. 1 is a schematic diagram of a prior art load traction technology of an isolated end
  • FIG. 2 is a schematic structural diagram of a radio frequency signal transmitter according to an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a method for IQ modulation according to an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a signal processing circuit according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a first branch power amplifier according to an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a second branch power amplifier according to an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a first branch power amplifier according to another embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a second branch power amplifier according to another embodiment of the present application.
  • FIG. 9 is a schematic diagram of a connection manner of a combination module according to an embodiment of the present application.
  • FIG. 10 is a schematic diagram of a connection manner of a combination module according to another embodiment of the present application.
  • FIG. 11 is a schematic diagram showing relationship between a drain current Idrain and a linear back-off voltage Vout of a main PA, a Peak PA, and a B-type single-tube power amplifier in a signal processing circuit according to an embodiment of the present application;
  • FIG. 12 is a schematic diagram showing relationship between a drain voltage Vdrain of a Main PA, a Peak PA, and a B-type single-tube power amplifier and a linear back-off voltage Vout in a signal processing circuit according to an embodiment of the present application;
  • FIG. 13 is a schematic diagram of an efficiency curve of a signal processing circuit according to an embodiment of the present application in a power back-off situation
  • FIG. 14 is a schematic diagram of an efficiency curve of a signal processing circuit according to an embodiment of the present application in a linear back-off condition
  • 15 is a schematic diagram showing the relationship between linear load pull ratio and linear back-off of Main PA, Peak PA, and Class B single-tube power amplifiers in a signal processing circuit according to an embodiment of the present application;
  • 16 is a schematic structural diagram of a 3-branch Doherty power amplifier or Chireix PA according to an embodiment of the present application;
  • 17 is a schematic structural diagram of a 4-branch Doherty power amplifier or a Chireix power amplifier according to an embodiment of the present application;
  • FIG. 18 is a schematic structural diagram of an out-of-phase Outphasing power amplifier according to an embodiment of the present application.
  • FIG. 19 is a schematic diagram of a back-off power and a drain output efficiency curve of a signal processing circuit according to an embodiment of the present application.
  • 20 is a schematic diagram of a curve of a back-off power and an LPR of a signal processing circuit according to an embodiment of the present application
  • FIG. 21 is a schematic diagram of a connection manner of a combination module according to still another embodiment of the present application.
  • FIG. 22 is a schematic diagram of a connection manner of a combination module according to another embodiment of the present application.
  • FIG. 23 is a schematic structural diagram of a power bridge according to an embodiment of the present application.
  • FIG. 24 is a schematic diagram of a connection manner of a combination module according to still another embodiment of the present application.
  • Embodiments of the present application are applied to a radio frequency signal transmitter of a communication device, where the communication device is a wireless communication device including, but not limited to, a user equipment, a base station, and the like.
  • the communication device can be a user device, which can be used for communication (eg, D2D communication) with one or more user devices, and can also be used to communicate with one or more base stations.
  • User equipment may also be referred to as user terminals and may include systems, subscriber units, subscriber stations, mobile stations, mobile terminals, mobile devices, nodes, devices, remote stations, remote terminals, terminals, wireless communication devices, wireless communication devices, or users Some or all of the features of the agent.
  • the user equipment can be a cellular phone, a cordless phone, a session initiation protocol (English name: session initiation protocol, SIP for short), a smart phone, a wireless local loop (English name: wireless local loop, WLL) station, personal number Assistant (full name: personal digital assistant, PDA for short), laptop computer, handheld communication device, handheld computing device, satellite wireless device, wireless modem card, and/or other processing for communicating on a wireless system device.
  • the user equipment may be a mobile terminal capable of accessing a wireless communication network such as 3G, 4G, LTE, or 5G, or may be a mobile terminal performing D2D wireless communication between devices.
  • the mobile terminal may include, an RF (Radio Frequency) transmitter (or RF circuit), a memory, other input devices, a display screen, a sensor, an audio circuit, an I/O (input/output) subsystem, and processing. Components such as a charge management chip and a power management chip.
  • the mobile terminal may also include a camera, a Bluetooth module, a virtual button, a physical button, and the like, and details are not described herein. It will be understood by those skilled in the art that the structure of the above mobile terminal is not limited, and may include more or less components, or combine some components, or split some components, or different component arrangements.
  • Common mobile terminals include, for example, mobile phones, tablets, notebook computers, PDAs (Personal Digital Assistants), handheld computers, MID (Mobile Internet Devices), POS (Point of Sales), On-board computers, wearable devices (such as smart watches, smart bracelets, pedometers, etc.).
  • the communication device may also be a base station, and the base station may be used for communicating with one or more user equipments, or for communicating with one or more base stations having partial user equipment functions (such as macro base stations and micro base stations, such as access).
  • Point, communication between; base stations may also be referred to as access points, nodes, Node Bs, evolved Node Bs (eNBs), or some other network entity, and may include some or all of the functions of the above network entities.
  • the base station can communicate with user equipment or other base stations over the air interface. This communication can be done by one or more sectors.
  • the base station can be used as a router between the wireless terminal and the rest of the access network by converting the received air interface frame into an IP (English full name: internet protocol, IP for short) packet, wherein the access network includes IP network.
  • IP International full name: internet protocol, IP for short
  • the base station can also coordinate the management of air interface attributes and can also be a gateway between the wired network and the wireless network.
  • module as used herein is intended to mean a device or entity that can perform digital signal or analog signal processing, or a computer-related entity, which may be a combination of hardware, firmware, hardware, and software. Software or software in operation.
  • information, signal, message, channel, and data may sometimes be mixed. It should be noted that when the difference is not emphasized, the expression is to be expressed. The meaning is the same. “of”, “corresponding (relevant)” and “corresponding” can sometimes be mixed. It should be noted that the meaning to be expressed is consistent when the distinction is not emphasized.
  • the device architecture and the scenario described in the embodiments of the present invention are for the purpose of illustrating the technical solutions of the embodiments of the present invention, and are not limited to the technical solutions provided by the embodiments of the present invention.
  • the technical solutions provided by the embodiments of the present invention are equally applicable to similar technical problems.
  • an embodiment of the present application provides an architecture of a radio frequency signal transmitter, where the radio frequency signal transmitter processes a digital signal to generate a radio frequency signal, and specifically includes:
  • Input interface 11 channel encoder 12, symbol encoder 13, baseband filter 14, IQ (In-phase/Quadrature) modulator 15, intermediate frequency local oscillator source 16, intermediate frequency filter 17, and upconverter 18
  • the RF local oscillator source 19 the power amplifier 20 and the antenna 21; the radio frequency signal transmitter shown in FIG. 2 has the basic functions of: a digital signal (data data or noise voice) is input from the input interface 11, and passes through the channel encoder.
  • an I/Q signal that is, a digital signal
  • a symbol encoder Symbol Encoder 13
  • one I/Q signal includes: I The road signal and the Q channel signal, wherein the I channel signal and the Q channel signal are orthogonal to each other
  • the I/Q signal is filtered by a baseband filter 14 , and then the I/Q modulator (IQ Modulator) 15 is based on the intermediate frequency.
  • the signal of the IF LO (Intermediate Frequency local oscillator) 16 is up-converted to the IF intermediate frequency to obtain an intermediate frequency signal of a predetermined amplitude and a predetermined phase; the intermediate frequency signal passes through the intermediate frequency filter 17 (IF Filter) and then passes through an upconverter (upconverter) 18 According to the shot.
  • the signal of the RF LO (Radio Frequency local oscillator) 19 is up-converted to obtain a radio frequency RF signal of a predetermined amplitude and a predetermined phase, that is, a radio frequency signal.
  • a plurality of sets of radio frequency signals of predetermined amplitude and predetermined phase may be generated, wherein one radio frequency signal corresponds to an I/Q signal generated by a routing symbol encoder 13, and the amplitude and phase of the radio frequency signal are from the I signal of the corresponding I/Q signal and The Q signal determines that the RF signal is then fed into the power amplifier circuit 20 and amplified by the power amplifier circuit 20 and transmitted through the antenna F.
  • Figure 2 shows only a relatively common IF and RF two-frequency transmitter block diagram.
  • the determination or adjustment of the amplitude and phase of the above radio frequency signals can be implemented in the I/Q modulator 15.
  • the principle is as follows: the I channel signal and the Q channel signal are two orthogonal signals, which can be regarded as points in the Cartesian coordinate system (x, y), for example, the amplitude value of the I channel signal is equivalent.
  • the amplitude value of the Q-channel signal is equivalent to the point on the y-axis, so changing the amplitude and phase of the I-channel signal and the Q-channel signal is equivalent to changing the I in the coordinate system (x, y)
  • the position of the corresponding point of the road signal and the Q signal, the signal I+j*Q passing through the I/Q modulator 15 can represent any point (vector) in the coordinate system, that is, the I signal is represented as the coordinate on the Y axis.
  • the amplitude is M(t)
  • the phase is ⁇ (t)
  • t represents time. Since the I channel signal and the Q channel signal are time-varying signals with respect to t, any time under the working condition can be generated according to the above manner. Any amplitude and phase signal.
  • the amplitude and phase of the RF signal to be generated can also be implemented in the digital signal processing process of the channel encoder 12 and the symbol encoder 13.
  • an embodiment of the present application provides a signal processing circuit, which can be applied to a radio frequency signal transmitter.
  • the signal processing circuit includes: a shunt module 41, a radio frequency signal conversion module 42, and a first branch power amplifier 43.
  • the branching module 41 is connected to the RF signal conversion module 42, and the RF signal conversion module 42 is connected to the first branch power amplifier 43 and the second branch power amplifier 44, the first branch The power amplifier 43 and the second branch power amplifier 44 are connected to the combining module 45;
  • the branching module 41 is configured to receive the first digital signal, and divide the first digital signal into at least one first branch digital signal and at least one second branch digital signal according to the input power of the first digital signal, and output at least one way first
  • the branch digital signal and the at least one second branch digital signal are sent to the RF signal conversion module 42, wherein the ratio of the amplitude of the at least one first branch digital signal and the amplitude of the at least one second branch digital signal follows the first digital signal
  • the input power variation, and/or the phase difference of the at least one first branch digital signal and the at least one second branch digital signal varies with the input power of the first digital signal;
  • the RF signal conversion module 32 is configured to convert at least one first branch digital signal and at least one second branch digital signal into at least one first branch RF signal and at least one second branch RF signal and output;
  • the branch power amplifier is configured to amplify and output the received at least one first branch RF signal to the combining module;
  • the second branch power amplifier is configured to amplify and output the received at least one second branch RF signal Road module
  • the first branch power amplifier 43 is configured to amplify and output the received at least one first radio frequency signal to the combining module 45;
  • the second branch power amplifier 44 is configured to amplify and output the received at least one second radio frequency signal to Combining module 45;
  • the combining module 45 is configured to receive at least one output signal output by the first branch power amplifier 43 and at least one output signal output by the second branch power amplifier 44, according to at least one output signal pair output by the second branch power amplifier 44. At least one output signal output from the first branch power amplifier 43 is adjusted and output.
  • the first branch power amplifier 43 can output at least one output signal, and the at least one output signal can be directly input to the combining module 45.
  • the at least one output signal is multi-channel, the combined signal can also be fed after combining.
  • the circuit module 45 in the following embodiment, when outputting a signal to the combination module, it may be that the first branch power amplifier 43 outputs only one output signal or one signal after the multiple output signals are combined.
  • the second branch power amplifier 44 can output at least one output signal, and the at least one output signal can be directly input to the combining module 45, of course, when the at least one output signal is multiplexed, It may also be sent to the combining module 45 after being combined, and the following embodiment outputs a signal (of course, it may be that the second branch power amplifier 44 outputs only one output signal or after combining multiple output signals.
  • the one-way signal is explained by taking the combination module as an example.
  • the RF signal conversion module 32 can include an Analog-to-Digital Converter (ADC) or a plurality of digital-to-analog converters.
  • ADC Analog-to-Digital Converter
  • the one digital-to-analog converter can convert at least one first branch digital signal and at least one second branch digital signal into at least one first branch RF signal and at least one second branch RF signal and output
  • each of the digital-to-analog converters processes the conversion of one branch digital signal to the RF signal, for example, converting the first branch digital signal to the first path through the ADC1.
  • the branch RF signal converts a second branch digital signal into a second branch RF signal through ADC2.
  • the shunt module 41 may be a separate functional entity or device connected to the symbol encoder 13, or the shunt module 41 may be integrated.
  • the symbol encoder 13 has the function of the branching module 41 at this time;
  • the radio frequency signal conversion module 32 can include at least one routing baseband filter 14, I/Q (In- Phase/Quadrature, in-phase quadrature modulator 15, intermediate frequency local oscillator 16, intermediate frequency filter 17, upconverter 18, radio frequency local oscillator 19 constitutes a radio frequency signal processing channel, each RF signal processing channel can achieve at least The function of converting one digital signal into at least one RF signal.
  • the radio frequency signal processing channel may further include one or more other devices, or one or more devices in the radio frequency signal processing channel are omitted, which is not limited in this application to enable radio frequency signal conversion.
  • the above functions of module 32 are correct.
  • the first branch power amplifier 43, the second branch power amplifier 44, and the combining module 45 collectively constitute the above-described power amplifier circuit 20.
  • the splitting module can divide the first digital signal into at least one first branch digital signal and at least one second branch digital signal according to the input power of the first digital signal
  • the radio frequency signal conversion module can enable at least one first branch Converting the digital signal and the at least one second branch digital signal into at least one first branch RF signal and at least one second branch RF signal and outputting; and at least one of the first branch digital signals having an amplitude and at least one second branch
  • the ratio of the amplitude of the digital signal of the road varies with the input power of the first digital signal, and/or the phase difference of at least one of the first branch digital signal and the at least one second branch digital signal varies with the input power of the first digital signal;
  • the at least one first branch RF signal entering the first branch power amplifier and the at least one second branch RF signal entering the second branch power amplifier are independently adjusted, so that the two branch power amplifiers can be adjusted.
  • phase and amplitude of each RF signal in the RF signal are satisfied so that the output efficiency of the signal processing circuit is up to To the maximum, that is, in the solution of the present application, a more flexible adjustment mode is provided for the signals of the two branch power amplifiers, so that it is more advantageous to improve the efficiency of power amplification of the signal processing circuit.
  • composition of the first branch power amplifier and the second branch power amplifier is as follows:
  • the first branch power amplifier 43 includes a first signal separator 431 and at least two first sub-power amplifiers connected to the first signal separator 431, and two in FIG. A sub-power amplifier (432 and 433) is taken as an example.
  • the input end of the first signal separator 431 is connected to the RF signal conversion module 42 to receive a first branch RF signal, and at least two outputs of the first signal separator 431 are respectively connected to a first sub power amplifier (432 or 433).
  • the first signal separator 431 is configured to separate a first branch RF signal into at least two RF signals and output the signals.
  • the first branch power amplifier 43 may also include a plurality of first signal splitters, and the connection manner of each of the first signal splitters may refer to the connection manner shown in FIG. 5 above.
  • the second branch power amplifier 44 includes a second signal separator 441 and at least two second sub-power amplifiers connected to the second signal separator 441.
  • a sub-power amplifier (442 and 443) is taken as an example.
  • the input end of the second signal separator 441 is connected to the RF signal conversion module to receive a second branch RF signal, and the at least two outputs of the second signal separator 441 are respectively connected to a second sub power amplifier (442 or 443);
  • the second signal separator 441 is configured to separate one channel of the second branch radio frequency signal into at least two radio frequency signals and output the signals.
  • the second branch power amplifier 44 may also include a plurality of second signal splitters, and the connection manner of each of the second signal splitters may refer to the connection manner shown in FIG. 6 above.
  • the first branch power amplifier 43 includes at least one first sub power amplifier, and an input end of any one of the at least one first sub power amplifier is connected to the radio frequency signal conversion module 42. , receiving the first branch of the RF signal.
  • the first branch RF signal m1 is input to the first sub-power amplifier G1
  • the first branch RF signal m2 is output to the second sub-power amplifier G2.
  • the first branch RF signal mk is input to the second sub-power amplifier. Gk.
  • the second branch power amplifier 44 includes at least one second sub-power amplifier, and the input of any of the at least one second sub-power amplifier is connected to the RF signal conversion
  • the module receives the RF signal of the second branch of the road.
  • the second branch RF signal n1 is input to the second sub-power amplifier H1
  • the second branch RF signal n2 is input to the second sub-power amplifier H2...
  • the second branch RF signal nk is input to the second sub-power amplifier Hk.
  • the form of the signal outputted by the first branch power amplifier 43 to the combining module 45 is not limited.
  • the first branch power amplifier 43 can output at least one output signal, which is at least One output signal can be directly input to the combining module 45.
  • the at least one output signal is multi-path, it can also be sent to the combining module 45 after being combined; in the above examples 1 to 4, the second branch is not The form of the signal outputted by the power amplifier 44 to the combining module 45 is limited.
  • the second branch power amplifier 44 can output at least one output signal, and the at least one output signal can be directly input to the combining module 45, of course, at least one output signal. When it is multiplexed, it can also be sent to the combining module 45 after being combined. In the following embodiment, one signal is output (of course, the second branch power amplifier 44 may output only one output signal or multiple outputs).
  • the signal after passing through the combined signal is given to the combination module as an example.
  • the first branch power amplifier 21 may include at least one of the following types of power amplifiers: a single-tube power amplifier, a Doherty power amplifier, a Chirex Chireix power amplifier, a heterogeneous Outphasing power amplifier, and an envelope. Track ET power amplifiers.
  • the second branch power amplifier 22 can include at least one of the following types of power amplifiers: a single-tube power amplifier, a Doherty power amplifier, a Chireix power amplifier, an Outphasing power amplifier, and an ET power amplifier.
  • a connection manner of a first branch power amplifier, a second branch power amplifier, and a combining module is illustrated, wherein the combining module 45 includes a three-port device;
  • the power amplifier 43 includes an output port;
  • the second branch power amplifier 44 includes an output port; wherein the first port of the three-port device is connected to the output port of the first branch power amplifier 43, and the first branch power amplifier 43 is specifically The first port for amplifying and outputting the received at least one first branch RF signal to the three-port device; it should be noted that if the first branch power amplifier 43 includes only one first sub-power amplifier, The output signal of the first sub-power amplifier is output.
  • the output signals of the two or more first sub-power amplifiers need to be combined.
  • the two or more first sub-power amplifiers may be configured by referring to the structure of the first example shown in FIG. 5 or the third example shown in FIG.
  • the third port of the three-port device is connected to the output port of the second branch power amplifier 44, and the second branch power amplifier 44 is specifically configured to amplify and output the received at least one second branch RF signal to the three The third port of the port device; it should be noted that if the second branch power amplifier 44 includes only one second sub-power amplifier, the output signal of the second sub-power amplifier is output, if the second branch power amplifier 44 Including two or more second sub-power amplifiers, the output signals of the two or more second sub-power amplifiers are also required to be combined, wherein the two or more second sub-power amplifiers can refer to the above-mentioned FIG. Example 2 or the structure of Example 4 shown in FIG.
  • a typical three-port device is a circulator. As shown in FIG.
  • the three-port device is implemented by a circulator, and the three-port network of the circulator realizes (approximate) one-way transmission from port 3 to port 1, and (approximate) one-way transmission from port 1 to port 2, thereby
  • port 1 of the circulator is also referred to as the input
  • port 2 is also referred to as the output
  • port 3 is also It is called the isolation end.
  • the current and voltage at the three ports of the circulator are:
  • V 3 I 3 ⁇ Z 0
  • V 1 is the voltage at port 1
  • I 1 is the current at port 1
  • V 2 is the voltage at port 2
  • I 2 is the current at port 2
  • I 3 is the voltage at port 3
  • V 3 is The current at port 3
  • Z 0 is the characteristic impedance of the circulator.
  • the output impedance of the first branch power amplifier 21 is:
  • the first branch power amplifier 43 may include a two-way Doherty power amplifier that inputs a first branch RF signal, and a second branch power amplifier 44 that is a Class B single-tube power amplifier whose input is Two-way RF signal.
  • the Doherty power amplifier includes a power splitter g (divider, which can use a bridge), a main power amplifier (main PA), and a peaking power amplifier (peak PA or auxiliary PA, a secondary power amplifier), wherein the power splitter g.
  • the main power amplifier (main PA) and the peaking power amplifier (peak PA) are connected to port 1 of the circulator 45 through an impedance matching network.
  • the power splitter g divides the first branch RF signal into two channels for main power amplifier (main PA) and peaking power amplifier (peak PA).
  • the impedance matching network includes an input impedance matching circuit c1 disposed between the power splitter g and the main power amplifier (main PA), and an input disposed between the power splitter g and the peaking power amplifier (peak PA)
  • An impedance matching circuit c2 a first output impedance conversion circuit c3 disposed at an output end of the main power amplifier (main PA), a second output impedance conversion circuit c4 disposed at an output end of the peaking power amplifier (peak PA), and a first output impedance
  • the conversion circuit c3 and the second output impedance conversion circuit c4 are connected to the output impedance matching circuit c5 of the port 1 of the circulator 23.
  • the second branch power amplifier 44 is a class B single-tube power amplifier.
  • the Doherty power amplifier efficiency curve is similar to a Class B single-tube power amplifier; at high power output, the peaking power amplifier (peak PA) is turned on, and the power amplifier circuit maintains high efficiency in the fallback range.
  • the total efficiency ⁇ 3 of the power amplifier circuit is determined by the efficiency of the two branch power amplifiers and the total power ratio:
  • the efficiency of the first branch power amplifier 43 is ⁇ 1
  • the efficiency of the second branch power amplifier 44 is ⁇ 2
  • the total power of the first branch power amplifier 43 is P 1
  • the second branch power amplifier 44 The total power of P 2 , where
  • the real number that is, the output current of the Doherty power amplifier of the first branch power amplifier 43 and the output current of the class B single-tube power amplifier of the second branch power amplifier 22 are required to be in phase or inverted.
  • the first branch power amplifier 43 and the second branch power amplifier 44 are respectively in a high efficiency point or a zero output power state, thereby achieving efficient output of the power amplifier circuit due to
  • any one of the at least one first branch radio frequency signal input to the first branch power amplifier 43 and the at least one second branch radio frequency signal input to the second branch power amplifier 44 are input.
  • any one of the RF signals is different; therefore, as long as the at least one first branch RF signal input to the first branch power amplifier and the at least one second branch RF signal input to the second branch power amplifier are independently adjusted, two
  • the phase and amplitude of each radio frequency signal received by the power amplifier of the road power amplifier are such that the two branches are respectively in a high efficiency point or a zero output power state, so that the output efficiency of the power amplifier circuit is maximized, that is, two in the solution of the present application.
  • the signal of the branch power amplifier provides a more flexible adjustment method, which is more conducive to improving the signal. No. Processing circuit power amplification efficiency.
  • the saturation output power ratio of the main PA, the Peaking PA of the Doherty power amplifier of the first branch power amplifier, and the B-type single-tube power amplifier of the second branch power amplifier is 12:12.
  • the case of :1 is an example (the power ratio can be any ratio, not limited to this example), and the characteristic data of each part of the power amplifying circuit of the signal processing circuit is simulated as shown in Fig. 11-15: Main PA, Peak PA on two branches
  • the relationship between the drain current Idrain and the linear back-off voltage Vout of the B-type single-tube power amplifier is as shown in FIG. 11; the relationship between the drain voltage Vdrain and the linear back-off voltage Vout is as shown in FIG.
  • the efficiency curve is shown in Figure 13, where the horizontal axis is the back-off power, the unit is dB (Backoff Power), the vertical axis is the drain output efficiency (Drain Efficiency); the efficiency curve in the case of linear back-off, as shown in the figure As shown in Fig. 14, the horizontal axis is the back-off voltage Vout, and the vertical axis is the drain output efficiency (Drain Efficiency); the relationship between the linear load pull ratio of the main PA, Peak PA and the B-type single-tube power amplifier and the linear back-off on the two branches , as shown in Figure 15. It can be seen from Fig. 11-15 that by adjusting the signal amplitude and phase of the first branch RF signal and the second branch RF signal on the two branches, more than four high efficiency points can be obtained at the time of high power backoff.
  • the Doherty power amplifier shown in FIG. 10 can be replaced by an Adoherty (Asymmetric Doherty) power amplifier or a Chirex Chireix power amplifier.
  • the second branch power amplifier in the embodiment of the present application may be replaced by another type of single-tube power amplifier, a Doherty power amplifier, a Chireix power amplifier, an Outphasing power amplifier, or an ET power amplifier, and may also include the foregoing power. At least one of the amplifiers.
  • a schematic diagram of a three-way Doherty power amplifier or a Chireix power amplifier is provided; the structure is similar to the two-way Doherty power amplifier of the first branch power amplifier shown in FIG. Includes a main power amplifier (main PA) and two peaking power amplifiers (peak1 PA and peak2 PA), and an impedance matching network; as shown in Figure 17, a 4-branch Doherty power amplifier or Chireix power amplifier is provided.
  • Schematic diagram of the structure it consists of a main power amplifier (main PA) and three peaking power amplifiers (peak1 PA, peak2 PA and peak3 PA), and an impedance matching network; as shown in Figure 18, a heterophasic Outphasing is provided.
  • a schematic diagram of a power amplifier includes: a signal component separator, two power amplifiers (PA1 and PA2), and an outphasing combiner.
  • the back-off power and the drain output efficiency curve of the 3-branch Doherty power amplifier in the prior art solution are provided, and the back-off power and the drain output of the power amplifier provided by the embodiments of the present application are provided.
  • the efficiency curve wherein "the first scheme of the present application” uses the class AB power amplifier in the first branch power amplifier in the embodiment of the present application, and the second branch power amplifier uses the class B single tube power amplifier as an example; "the second embodiment of the present application” In the embodiment of the present application, the first branch power amplifier uses a 2-way Doherty power amplifier, and the second branch power amplifier uses a class B single-tube power amplifier as an example; by controlling the RF signals input by the two branch power amplifiers The phase and amplitude enable the second branch power amplifier to load the first branch power amplifier to achieve high efficiency operation under greater power back-off.
  • the total peak power of the first branch power amplifier and the total peak power ratio a of the second branch power amplifier are related to the operating backoff range of the entire power amplifier circuit.
  • the larger the ratio the more the power amplifier circuit has a fallback range. Large, and the theoretical maximum retreat range is 10*lg(a+1). And this ratio affects the number of high efficiency points (extreme points) in the fallback range. When the ratio is greater than 3 and less than 8, three high efficiency extreme points are obtained; when the ratio is greater than 8, four can be obtained. High efficiency extreme point.
  • the "prior art scheme curve 1" provides a curve of the Doherty power amplifier back-off power of the three-way road in the prior art and the load pull ratio (LPR) of the main PA;
  • the technical solution curve 2" provides a curve of the back-off power of the 3-branch Doherty power amplifier in the prior art and the LPR of the peak1 PA;
  • “Prior Art Scheme Curve 3” provides the prior art 3-branch Doherty PA The back-off power and the LPR curve of the peak2 PA;
  • Scheme 1 of the present application provides the back-off power and the second branch power amplifier of the class AB power amplifier used in the first branch power amplifier in the embodiment of the present application.
  • the curve of the LPR; the curve 2 of the present application provides the curve of the back-off power of the class AB power amplifier used in the first branch power amplifier and the LPR of the first branch power amplifier in the embodiment of the present application;
  • the application scheme 2 curve 1 ′′ provides the curve of the back-off power of the 2-branch Doherty power amplifier used by the first branch power amplifier in the embodiment of the present application and the LPR of the second branch power amplifier;
  • This application The second curve 2 provides the curve of the back-off power of the two-way Doherty power amplifier used in the first branch power amplifier in the embodiment of the present application and the main PA LPR of the first branch power amplifier;
  • Scheme 2 of the present application Curve 3 provides a curve of the back-off power of the 2-branch Doherty power amplifier used by the first branch power amplifier in the embodiment of the present application and the peak PA LPR curve of the first branch power amplifier; the first branch power
  • the amplifier's Class AB power amplifier or 2-way Doherty power amplifier solution can achieve more high
  • the three-port device 45 includes a first isolator 451 and a second isolator 452; wherein the input of the first isolator 451 is coupled to the first port of the three-port device (port 1 The output of the first isolator is connected to the second port of the three-port device (port 2); the input of the second isolator 452 is connected to the third port of the three-port device (port 3); the output of the second isolator Connect the first port (port 1) of the three-port device.
  • the unidirectional conduction function of the isolator due to the unidirectional conduction function of the isolator, a function similar to that of the circulator is realized.
  • the second isolator 452 is configured to transmit a signal received by the third port of the three-port device to the input end of the first isolator; the first isolator 451 is configured to receive the signal pair according to the third port of the three-port device. The signal received by the first port of the three-port device is adjusted and output through the second port of the three-port device.
  • the combining module 45 can also be a four-port device, which can be a squirrel cage coupler or a bridge; as shown in FIG. 22, the first branch power amplifier 43 includes a first output port and a second output port; the second branch power amplifier 44 includes an output port;
  • the first output port of the first branch power amplifier 43 is connected to the first port (port 1) of the four-port device; the second output port of the first branch power amplifier 43 is connected to the second port (port 2) of the four-port device;
  • the output port of the second branch power amplifier 44 is connected to the third port (port 3) of the four-port device;
  • the first branch power amplifier 43 is specifically configured to receive at least two first-channel RF signals, and respectively amplify the received at least two first RF signals and respectively output to the first port and the second port of the four-port device; As shown in FIG. 22, by way of example, the first branch power amplifier 43 includes a first sub-power amplifier G1 and a first sub-power amplifier G2, and a first branch RF signal is amplified and output through the first sub-power amplifier G1, and The first branch of the RF signal is amplified by the first sub-power amplifier G2; the second branch power amplifier 44 is specifically configured to amplify and output the received at least one second branch RF signal (n1-nk) to the four-port device a third port; the four-port device is configured to adjust, according to the signal received by the third port, the signal received by the first port and the signal received by the second port, and the signal received by the adjusted first port and the second port The received signal is combined and output to the fourth port (port 4) of the four-port device.
  • the first branch power amplifier includes more sub power amplifiers, or when more than two RF signals are amplified, some or all of the amplified RF signals may be combined.
  • the two RF signals are obtained and output to the second port and the third port of the four-port device, respectively.
  • the second branch power amplifier includes more than one sub power amplifier, or when more than one RF signal is amplified, more than one amplified RF signal may be combined to obtain one way.
  • the subsequent RF signal is output to the third port of the four port device.
  • the first output signal outputted by the first sub-power amplifier G1 and the second output signal output by the first sub-power amplifier G2 have the same amplitude, and the phases are different by 90°, and the output of the first sub-power amplifier G1 And the output end of the first sub-power amplifier G2 is respectively connected to a coupled port and a direct port of the bridge, and the first output signal and the second output signal are combined and output from the input port, and are isolated.
  • There is no signal output; the combined signal output from the power amplifier 44 of the second branch is input from the isolated terminal, and is split into two signals with the same amplitude and phase difference of 90 degrees from the coupled port. ) and direct port, input port has no output.
  • the (approximate) one-way transmission from the isolated end to the coupled end, the through end, and from the coupled end, the through end to the isolated end is realized.
  • the two signals divided by the combined input signal of the isolated input are respectively adjusted to the first output signal and the second output signal of the coupled port and the direct port, and are adjusted.
  • the first output signal and the second output signal are combined and output through an input port of the bridge.
  • the first branch power amplifier 43 when the combining module 45 adopts a four-port device, as shown in FIG. 24, if the first branch power amplifier 43 receives only one first branch radio frequency signal, the first branch power amplifier 43 includes a signal separator 431, a first sub-power amplifier 432 and a second sub-power amplifier 433; wherein the input port RF signal conversion module 42 of the signal separator 431 receives a first branch RF signal; the first output port of the signal separator 431 is connected to the first An input port of the sub-power amplifier 432, an output port of the first sub-power amplifier 432 is connected to the first port of the four-port device; a second output port of the signal separator 433 is connected to the input port of the first sub-power amplifier 433, the first sub-power The output port of the amplifier 433 is connected to the second port of the four-port device; the signal separator 431 is configured to separate the first branch RF signal into at least two RF signals and input the first sub-power amplifier 432 and the first sub-power amplifier,
  • the output port of the second branch power amplifier 44 is connected to the third port of the four-port device, specifically for receiving at least one The second RF signal is amplified and combined to output to the third port of the four-port device; the four-port device adjusts the signal received by the first port and the signal received by the second port according to the signal received by the third port, and the adjusted The signal received by one port and the signal received by the second port are combined and output to the fourth port of the four-port device.
  • the signal separator 431 can be a bridge.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)

Abstract

本申请实施例公开了一种信号处理电路、射频信号发射机和通信设备，涉及电子设备技术领域，能够提高信号处理电路功率放大的效率。信号处理电路包括：分路模块、射频信号转换模块、第一支路功率放大器、第二支路功率放大器以及合路模块；分路模块连接射频信号转换模块，射频信号转换模块连接第一支路功率放大器和第二支路功率放大器，第一支路功率放大器和第二支路功率放大器连接合路模块。

Description

一种信号处理电路、射频信号发射机和通信设备 技术领域
本申请涉及电子设备技术领域，尤其涉及一种信号处理电路、射频信号发射机和通信设备。
背景技术
目前，在现代数字通信标准中，信号的峰均比很高，一般在8dB以上，甚至可以达到10dB以上，因此，需要射频信号发射器的功率放大器(power amplifier，PA，简称功放)工作在大功率回退状态下。对于传统的AB类功率放大器，在功率回退时其效率下降迅速。传统的2路多尔蒂Doherty可以在功率回退6dB范围内保持相对较高的效率，采用2路ADoherty(asymmetric Doherty，非对称Doherty)技术可以实现在功率回退超过6dB的高效率工作，但是，在功率回退范围内的效率曲线出现一个明显的“效率凹陷区”，且功率回退的范围越大，“效率凹陷区”的凹陷越大，功放对应的工作效率就会越低。
如图1所示，现有技术提供一种隔离端负载牵引技术，其中功分器3将功放输入端1接收到的射频输入信号分为两路信号；功分器3的一个输出端接主功率放大器4，另一输出端接副功率放大器5，且副功率放大器5仅工作于功分器3有高电平输出信号时。副功率放大器5的输出信号通过环形器6注入到主功率放大器4的输出端，主功率放大器4的输出信号通过环形器6注入到输出端2。现有技术方案的主功率放大器采用AB类功率放大器，副功率放大器采用C类功率放大器，虽然，理论上可以在大功率回退下获得高效率，但是，主功率放大器需要在大负载牵引比情况下工作，此时，主功率放大器的效率会急剧下降，导致功放的总体效率很低。现有技术方案中，采用一个功放输入端1，通过功分器3将射频输入信号分成两路信号输入到主功率放大器和副功率放大器，主副两路信号的相位和幅度调节力度有限，副功率放大器对主功率放大器的负载牵引作用有限，功率回退量较小，功率放大的效率低下。
发明内容
本申请的实施例提供一种信号处理电路、射频信号发射机和通信设备，能够提高信号处理电路功率放大的效率。
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，提供一种信号处理电路，包括：分路模块、射频信号转换模块、第一支路功率放大器、第二支路功率放大器以及合路模块；分路模块连接射频信号转换模块，射频信号转换模块连接第一支路功率放大器和第二支路功率放大器，第一支路功率放大器和第二支路功率放大器连接合路模块；其中，分路模块，用于接收第一数字信号，根据第一数字信号的输入功率将第一数字信号分成至少一路第一支路数字信号和至少一路第二支路数字信号，输出至少一路第一支路数字 信号和至少一路第二支路数字信号给射频信号转换模块，至少一路第一支路数字信号的幅度和至少一路第二支路数字信号的幅度的比值随第一数字信号的输入功率变化，和/或至少一路第一支路数字信号和至少一路第二支路数字信号的相位差随第一数字信号的输入功率变化；射频信号转换模块，用于将至少一路第一支路数字信号和至少一路第二支路数字信号转换成至少一路第一支路射频信号和至少一路第二支路射频信号并输出；第一支路功率放大器用于对接收到的至少一路第一支路射频信号放大输出至合路模块；第二支路功率放大器用于对接收到的至少一路第二支路射频信号放大并输出至合路模块；合路模块用于接收第一支路功率放大器输出的至少一路输出信号以及第二支路功率放大器输出的至少一路输出信号，根据第二支路功率放大器输出的至少一路输出信号对第一支路功率放大器输出的至少一路输出信号进行调整并输出。
这样由于分路模块能够根据第一数字信号的输入功率将第一数字信号分成至少一路第一支路数字信号和至少一路第二支路数字信号，并且射频信号转换模块能够将至少一路第一支路数字信号和至少一路第二支路数字信号转换成至少一路第一支路射频信号和至少一路第二支路射频信号并输出；而至少一路第一支路数字信号的幅度和至少一路第二支路数字信号的幅度的比值随第一数字信号的输入功率变化，和/或至少一路第一支路数字信号和至少一路第二支路数字信号的相位差随第一数字信号的输入功率变化；这样进入第一支路功率放大器的至少一路第一支路射频信号与进入第二支路功率放大器的至少一路第二支路射频信号相互独立进行调整，这样可以通过调整两支路功率放大器接收的射频信号中各射频信号的相位和幅度满足使得信号处理电路的输出效率达到最大，即在本申请的方案中为两个支路功率放大器的信号提供了更灵活的调节方式，因此更加有利于提高信号处理电路功率放大的效率。同时，通过分路模块对数字信号进行分路，可以实现精确的信号幅度和/或相位的调整，从而使得进入两个支路功率放大器的射频信号的调整更为精确，从而更精确的匹配功率放大器的工作区域，进一步提升功率放大器的工作效率。
在一种示例性的方案中，第一支路功率放大器包括第一信号分离器和至少两个与第一信号分离器相连接的第一子功率放大器；第一信号分离器的输入端所述射频信号转换模块，接收一路第一支路射频信号，第一信号分离器的至少两个输出端分别连接一个第一子功率放大器；第一信号分离器用于将一路第一支路射频信号分离成至少两路射频信号并输出。
在一种示例性的方案中，第二支路功率放大器包括第二信号分离器和至少两个与第二信号分离器相连接的第二子功率放大器；第二信号分离器的输入端所述射频信号转换模块，接收一路第二支路射频信号，第二信号分离器的至少两个输出端分别连接一个第二子功率放大器；第二信号分离器用于将一路第二支路射频信号分离成至少两路射频信号并输出。
在一种示例性的方案中，第一支路功率放大器包括至少一个第一子功率放大器，至少一个第一子功率放大器中的任意一个第一子功率放大器的输入端连接射频信号转换模块，接收一路第一支路射频信号。
在一种示例性的方案中，第二支路功率放大器包括至少一个第二子功率放大器，至少一个第二子功率放大器中的任一第二子功率放大器的输入端连接射频信号转换模块，接收一路第二支路射频信号。
在一种示例性的方案中，合路模块包括三端口器件；第一支路功率放大器包括一个输出端口；第二支路功率放大器包括一个输出端口；其中，三端口器件的第一端口连接第一支路功率放大器的输出端口，第一支路功率放大器具体用于对接收到的至少一路第一支路射频信号放大输出至三端口器件的第一端口；三端口器件的第三端口连接第二支路功率放大器的输出端口，第二支路功率放大器具体用于对接收到的至少一路第二支路射频信号放大并输出至三端口器件的第三端口；三端口器件用于根据第三端口接收的信号对第一端口接收的信号进行调整，并通过三端口器件的第二端口输出。
其中，三端口器件包括环形器。或者，三端口器件包括第一隔离器和第二隔离器；第一隔离器的输入端连接三端口器件的第一端口，第一隔离器的输出端连接三端口器件的第二端口；第二隔离器的输入端连接三端口器件的第三端口；第二隔离器的输出端连接三端口器件的第一端口；第二隔离器用于将三端口器件的第三端口接收的信号传输至第一隔离器的输入端；第一隔离器用于根据三端口器件的第三端口接收的信号对三端口器件的第一端口接收的信号进行调整，并通过三端口器件的第二端口输出。
在一种示例性的方案中，合路模块包括四端口器件；第一支路功率放大器包括第一输出端口和第二输出端口；第二支路功率放大器包括一个输出端口；第一支路功率放大器的第一输出端口连接四端口器件的第一端口；第一支路功率放大器的第二输出端口连接四端口器件的第二端口；第二支路功率放大器的输出端口连接四端口器件的第三端口；第一支路功率放大器具体用于接收至少两路第一支路射频信号，对接收到的至少两路第一射频信号分别放大输出至四端口器件的第一端口和第二端口；
第二支路功率放大器具体用于对接收到的至少一路第二射频信号放大输出至四端口器件的第三端口；四端口器件用于根据第三端口接收的信号对第一端口接收的信号以及第二端口接收的信号进行调整，将调整后的第一端口接收的信号和第二端口接收的信号合路输出至四端口器件的第四端口。
其中，四端口器件包括鼠笼式耦合器rat-race和电桥中的至少一种。
在一种示例性的方案中，第一支路功率放大器包括以下各类型的功率放大器中的至少一种：单管放大器功率放大器、多尔蒂Doherty功率放大器、希莱克斯Chireix功率放大器、异相Outphasing功率放大器、包络线跟踪ET功率放大器。
在一种示例性的方案中，第二支路功率放大器包括以下各类型的功率放大器中的至少一种：单管放大器功率放大器、Doherty功率放大器、Chireix功率放大器、Outphasing功率放大器、ET功率放大器。
在一种示例性的方案中，第一支路功率放大器包括Doherty功率放大器，和/或，所述第二支路功率放大器包括Doherty功率放大器。其中，第一支路功率放大器采用Doherty功率放大器可以进一步减小第一支路功率放大器在功率回退下时 的负载牵引比，同时也可以进一步提高第一支路功率放大器在功率回退下时的工作效率，进而提高信号处理电路在功率回退下时的工作效率。第二支路功率放大器采用Doherty功率放大器可以进一步提高所述信号处理电路在大功率回退下的工作效率。
第二方面，提供一种射频信号发射机，包括：上述的任一信号处理电路。
第三方面，提供一种通信设备，包括：上述的射频信号发射机。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍。
图1为现有技术提供一种隔离端负载牵引技术示意图；
图2为本申请的实施例提供的一种射频信号发射机的结构示意图；
图3为本申请的实施例提供的一种IQ调制的方法示意图；
图4为本申请的实施例提供的一种信号处理电路的结构示意图；
图5为本申请的实施例提供的第一支路功率放大器的结构示意图；
图6为本申请的实施例提供的第二支路功率放大器的结构示意图；
图7为本申请的另一实施例提供的第一支路功率放大器的结构示意图；
图8为本申请的另一实施例提供的第二支路功率放大器的结构示意图；
图9为本申请的实施例提供的一种合路模块的连接方式示意图；
图10为本申请的另一实施例提供的一种合路模块的连接方式示意图；
图11为本申请的实施例提供的信号处理电路中Main PA、Peak PA和B类单管功率放大器的漏极电流Idrain与线性回退电压Vout的关系示意图；
图12为本申请的实施例提供的信号处理电路中Main PA、Peak PA和B类单管功率放大器的漏极电压Vdrain与线性回退电压Vout的关系示意图；
图13为本申请的实施例提供的信号处理电路在功率回退情况下的效率曲线示意图；
图14为本申请的实施例提供的信号处理电路在线性回退情况下的效率曲线示意图；
图15为本申请的实施例提供的信号处理电路中Main PA、Peak PA和B类单管功率放大器的线性负载牵引比与线性回退的关系示意图；
图16为本申请的实施例提供的一种3支路的Doherty功率放大器或者ChireixPA的结构示意图；
图17为本申请的实施例提供的一种4支路的Doherty功率放大器或者Chireix功率放大器的结构示意图；
图18为本申请的实施例提供的一种异相Outphasing功率放大器的结构示意图；
图19为本申请的实施例提供的信号处理电路的回退功率和漏极输出效率曲线示意图；
图20为本申请的实施例提供的信号处理电路的回退功率与LPR的曲线示意图；
图21为本申请的再一实施例提供的一种合路模块的连接方式示意图；
图22为本申请的另一实施例提供的一种合路模块的连接方式示意图；
图23为本申请的实施例提供的一种电桥的结构示意图；
图24为本申请的又一实施例提供的一种合路模块的连接方式示意图。
具体实施方式
下面结合附图，对本申请的实施例进行描述。
本申请的实施例应用于通信设备的射频信号发射机，其中，该通信设备为无线通信设备包括但不限于用户设备、基站等等。
通信设备可以为用户设备，用户设备可以用于一个或多个用户设备进行通信(比如D2D通信)，也可以用于与一个或多个基站进行通信。用户设备还可以称为用户终端，并且可以包括系统、用户单元、用户站、移动站、移动终端、移动设备、节点、设备、远程站、远程终端、终端、无线通信设备、无线通信装置或用户代理的功能中的一些或者所有功能。用户设备可以是蜂窝电话、无绳电话、会话发起协议(英文全称：session initiation protocol，简称：SIP)电话、智能电话、无线本地环路(英文全称：wireless local loop，简称：WLL)站、个人数字助理(英文全称：personal digital assistant，简称：PDA)、膝上型计算机、手持式通信设备、手持式计算设备、卫星无线设备、无线调制解调器卡和/或用于在无线系统上进行通信的其它处理设备。例如该用户设备可以为能够接入3G、4G、LTE、5G等无线通信网络的移动终端，还可以是进行设备间D2D无线通信的移动终端。移动终端可以包括、RF(Radio Frequency，射频)发射机(或射频电路)、存储器、其他输入设备、显示屏、传感器、音频电路、I/O(input/output,输入/输出)子系统、处理器、充电管理芯片和电源管理芯片等部件。移动终端还可以包括摄像头、蓝牙模块、虚拟按键、实体按键等部件，在此不再赘述。本领域技术人员可以理解，上述移动终端的结构并不构成限定，可以包括更多或更少的部件，或者组合某些部件，或者拆分某些部件，或者不同的部件布置。常见的移动终端例如包括：手机、平板电脑、笔记本电脑、PDA(Personal Digital Assistant，个人数字助理)、掌上电脑、MID(Mobile Internet Device，移动互联网设备)、POS(Point of Sales，销售终端)、车载电脑、可穿戴设备(例如智能手表、智能手环、计步器)等。
通信设备也可以为基站，基站可以用于与一个或多个用户设备进行通信，也可以用于与一个或多个具有部分用户设备功能的基站进行通信(比如宏基站与微基站，如接入点，之间的通信)；基站还可以称为接入点、节点、节点B、演进节点B(eNB)或某种其它网络实体，并且可以包括以上网络实体的功能中的一些或所有功能。基站可以通过空中接口与用户设备或其他基站进行通信。该通信可以通过一个或多个扇区来进行。基站可以通过将所接收的空中接口帧转换成IP(英文全称：internet protocol，简称：IP)分组，来用作无线终端和接入网络的其余部分之间的路由器，其中所述接入网络包括IP网络。基站还可以对空中接口属性的管理进行协调，并且还可以是有线网络和无线网络之间的网关。
在本申请的实施例中使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本发明。在本发明实施例和所附权利要求书中所使用的单数形式的“一种”、 “所述”和“该”也旨在包括多数形式，除非上下文清楚地表示其他含义。还应当理解，本文中使用的术语“和/或”是指并包含一个或多个相关联的列出项目的任何或所有可能组合。本文中字符“/”，一般表示前后关联对象是一种“或”的关系。此外本申请中的“第一”和“第二”等等并不表示重要性或先后顺序，仅表示一种区别。
在本发明实施例中，“示例的”一词用于表示作例子、例证或说明。本申请中被描述为“示例”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。确切而言，使用示例的一词旨在以具体方式呈现概念。本申请所使用的术语“模块”旨在指代可以进行数字信号或者模拟信号处理的器件或者实体，也可以指代计算机相关实体，该器件或者实体可以是硬件、固件、硬件和软件的结合、软件或者运行中的软件。
本发明实施例中，信息(information)，信号(signal)，消息(message)，信道(channel)、数据(data)有时可以混用，应当指出的是，在不强调其区别时，其所要表达的含义是一致的。“的(of)”，“相应的(corresponding，relevant)”和“对应的(corresponding)”有时可以混用，应当指出的是，在不强调其区别时，其所要表达的含义是一致的。
本发明实施例描述的设备架构以及场景是为了更加清楚的说明本发明实施例的技术方案，并不构成对于本发明实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本发明实施例提供的技术方案对于类似的技术问题，同样适用。
参照图2所示，本申请的实施例提供一种射频信号发射机的架构，该射频信号发射机中以将一路数字信号处理生成一路射频信号为例，具体包括：
输入接口11、信道编码器12、符号编码器13、基带滤波器14、IQ(In-phase/Quadrature，同相正交)调制器15、中频本振源16、中频滤波器17、升频器18、射频本振源19、功率放大器20和天线21；如图2所示的射频信号发射机，其基本功能为：数字信号(数据data或噪声voice)自输入接口11接入，经过信道编码器12的信道编码(channel coding)，交织(Interleaving)等至少一种处理后，在符号编码器(Symbol Encoder)13中生成一路I/Q信号即一路数字信号，其中一路I/Q信号包含：I路信号以及Q路信号，其中I路信号与Q路信号相互正交，I/Q信号通过基带滤波器(Baseband Filter)14进行滤波，后在I/Q调制器(IQ Modulator)15根据中频本振源(IF LO，Intermediate Frequency local oscillator)16的信号上变频到IF中频，得到预定幅度及预定相位的中频信号；中频信号经过中频滤波器17(IF Filter)后通过升频器(upconverter)18根据射频本振源(RF LO，Radio Frequency local oscillator)19的信号上变频得到预定幅度及预定相位的射频RF信号即射频信号。从而可生成多组预定幅度及预定相位的射频信号，其中一路射频信号对应一路由符号编码器13生成的I/Q信号，射频信号的幅度和相位由对应的I/Q信号中I路信号以及Q路信号决定，之后射频信号馈入到功率放大器电路(amplifier)20中，并经功率放大器电路20放大后通过天线F发射。
其中，图2示出的仅仅是一种比较通用的中频和射频两次变频的发射机框图， 此外，也有多次变频或者直接将基带信号变频到射频(IQ调制器15直接生成射频RF信号)的发射机，这些发射机同样适用于本申请。此外，上述射频信号的幅度和相位的确定或调整，可以在I/Q调制器15中实现。参照图3所示，其原理为：I路信号以及Q路信号为两路正交信号，可以看做直角坐标系(x，y)中的点，例如，将I路信号的幅度值等效为x轴上的点，将Q路信号的幅度值等效为y轴上的点，因此改变I路信号以及Q路信号的幅度和相位等效为改变坐标系(x，y)中的I路信号以及Q路信号对应点的位置，经过I/Q调制器15的信号I+j*Q可以表示坐标系中的任意点(向量)，即：I路信号表示为在Y轴上的坐标y＝I(t)＝M(t)*cos[Θ(t)]；Q路信号表示为在X轴上的坐标x＝Q(t)＝M(t)*sin[Θ(t)]，其中，幅度为M(t)，相位为Θ(t)，t表示时间，由于I路信号和Q路信号均为关于t的时变信号，因此按照上述方式可以生成工况条件下任意时刻任意幅度和相位的信号。当然，要生成射频信号的幅度和相位也可以在信道编码器12以及符号编码器13进行数字信号处理过程中实现。
参照图4所示，本申请的实施例提供一种信号处理电路，可应用于射频信号发射机，信号处理电路包括：分路模块41、射频信号转换模块42、第一支路功率放大器43、第二支路功率放大器44以及合路模块45；分路模块41连接射频信号转换模块42，射频信号转换模块42连接第一支路功率放大器43和第二支路功率放大器44，第一支路功率放大器43和第二支路功率放大器44连接合路模块45；
分路模块41，用于接收第一数字信号，根据第一数字信号的输入功率将第一数字信号分成至少一路第一支路数字信号和至少一路第二支路数字信号，输出至少一路第一支路数字信号和至少一路第二支路数字信号给射频信号转换模块42，其中，至少一路第一支路数字信号的幅度和至少一路第二支路数字信号的幅度的比值随第一数字信号的输入功率变化，和/或至少一路第一支路数字信号和至少一路第二支路数字信号的相位差随第一数字信号的输入功率变化；
射频信号转换模块32，用于将至少一路第一支路数字信号和至少一路第二支路数字信号转换成至少一路第一支路射频信号和至少一路第二支路射频信号并输出；第一支路功率放大器用于对接收到的至少一路第一支路射频信号放大输出至合路模块；第二支路功率放大器用于对接收到的至少一路第二支路射频信号放大并输出至合路模块；
第一支路功率放大器43用于对接收到的至少一路第一射频信号放大输出至合路模块45；第二支路功率放大器44用于对接收到的至少一路第二射频信号放大并输出至合路模块45；
合路模块45用于接收第一支路功率放大器43输出的至少一路输出信号以及第二支路功率放大器44输出的至少一路输出信号，根据第二支路功率放大器44输出的至少一路输出信号对第一支路功率放大器43输出的至少一路输出信号进行调整并输出。
其中，第一支路功率放大器43可以输出至少一路输出信号，这至少一路输出信号可以直接输入合路模块45，当然在该至少一路输出信号为多路时，也可以经过合路后送入合路模块45，下述实施例中以输出一路信号给合路模块说明时，可 能是第一支路功率放大器43仅输出一路输出信号或者是对多路输出信号经过合路后的一路信号，下述的实施例中将结合示例详细说明；第二支路功率放大器44可以输出至少一路输出信号，这至少一路输出信号可以直接输入合路模块45，当然在该至少一路输出信号为多路时，也可以经过合路后送入合路模块45，下述实施例中以输出一路信号(当然，可能是第二支路功率放大器44仅输出一路输出信号或者是对多路输出信号经过合路后的一路信号)给合路模块为例进行说明。
可选的，射频信号转换模块32中可以包含一个数模转换器(Analog-to-Digital Converter，ADC)或多个数模转换器，可以理解的是，当射频信号转换模块32包含一个数模转换器时，该一个数模转换器可以将至少一路第一支路数字信号和至少一路第二支路数字信号转换成至少一路第一支路射频信号和至少一路第二支路射频信号并输出，当射频信号转换模块32包含多个数模转换器时，每一个数模转换器处理一个支路数字信号到射频信号的转换，例如通过ADC1将一路第一支路数字信号转换为一路第一支路射频信号，通过ADC2将一路第二支路数字信号转换为一路第二支路射频信号。可选的，当将该信号处理电路应用于上述的射频信号发射机的架构时，分路模块41可以为连接在符号编码器13后的单独的功能实体或者器件，或者分路模块41可以集成在符号编码器13中，或者作为其中的一个功能模块，此时符号编码器13具有分路模块41的功能；射频信号转换模块32可以包括至少一路由基带滤波器14、I/Q(In-phase/Quadrature，同相正交)调制器15、中频本振源16、中频滤波器17、升频器18、射频本振源19构成的射频信号处理通道，每一路射频信号处理通道可以实现将至少一路数字信号转换成至少一路射频信号的功能。当然在一些示例中，上述射频信号处理通道还可以包含其他的一个或多个器件，或者省略上述射频信号处理通道中的一个或多个器件，本申请并不做限定，以能够实现射频信号转换模块32的上述功能为准。第一支路功率放大器43、第二支路功率放大器44以及合路模块45共同构成上述的功率放大器电路20。
由于分路模块能够根据第一数字信号的输入功率将第一数字信号分成至少一路第一支路数字信号和至少一路第二支路数字信号，并且射频信号转换模块能够将至少一路第一支路数字信号和至少一路第二支路数字信号转换成至少一路第一支路射频信号和至少一路第二支路射频信号并输出；而至少一路第一支路数字信号的幅度和至少一路第二支路数字信号的幅度的比值随第一数字信号的输入功率变化，和/或至少一路第一支路数字信号和至少一路第二支路数字信号的相位差随第一数字信号的输入功率变化；这样进入第一支路功率放大器的至少一路第一支路射频信号与进入第二支路功率放大器的至少一路第二支路射频信号相互独立进行调整，这样可以通过调整两支路功率放大器接收的射频信号中各射频信号的相位和幅度满足使得信号处理电路的输出效率达到最大，即在本申请的方案中为两个支路功率放大器的信号提供了更灵活的调节方式，因此更加有利于提高信号处理电路功率放大的效率。
关于第一支路功率放大器和第二支路功率放大器的构成，说明如下：
示例一：如图5所示，第一支路功率放大器43包括第一信号分离器431和至 少两个与第一信号分离器431相连接的第一子功率放大器，图5中以两个第一子功率放大器(432和433)为例。第一信号分离器431的输入端连接射频信号转换模块42，接收一路第一支路射频信号，第一信号分离器431的至少两个输出端分别连接一个第一子功率放大器(432或433)；第一信号分离器431用于将一路第一支路射频信号分离成至少两路射频信号并输出。当然，第一支路功率放大器43也可以包含多个第一信号分离器，每个第一信号分离器的连接方式可以参考上述图5示出的连接方式。
示例二：如图6所示，第二支路功率放大器44包括第二信号分离器441和至少两个与第二信号分离器441相连接的第二子功率放大器，图6中以两个第一子功率放大器(442和443)为例。第二信号分离器441的输入端连接射频信号转换模块，接收一路第二支路射频信号，第二信号分离器441的至少两个输出端分别连接一个第二子功率放大器(442或443)；第二信号分离器441用于将一路所述第二支路射频信号分离成至少两路射频信号并输出。当然，第二支路功率放大器44也可以包含多个第二信号分离器，每个第二信号分离器的连接方式可以参考上述图6示出的连接方式。
示例三：如图7所示，第一支路功率放大器43包括至少一个第一子功率放大器，至少一个第一子功率放大器中的任意一个第一子功率放大器的输入端连接射频信号转换模块42，接收一路第一支路射频信号。如图7所示，第一支路射频信号m1输入第一子功率放大器G1，第一支路射频信号m2输出第二子功率放大器G2……第一支路射频信号mk输入第二子功率放大器Gk。
示例四：如图8所示，第二支路功率放大器44包括至少一个第二子功率放大器，所述至少一个第二子功率放大器中的任一第二子功率放大器的输入端连接射频信号转换模块，接收一路第二支路射频信号。如图8所示，第二支路射频信号n1输入第二子功率放大器H1，第二支路射频信号n2输入第二子功率放大器H2……第二支路射频信号nk输入第二子功率放大器Hk。
可以理解的是，在一个功率放大器电路中可以采用上述示例一至示例四中任一一种或多种情况组合的结构。上述示例一至示例四中，并未对第一支路功率放大器43输出至合路模块45的信号的形式做限定，如前所述第一支路功率放大器43可以输出至少一路输出信号，这至少一路输出信号可以直接输入合路模块45，当然在该至少一路输出信号为多路时，也可以经过合路后送入合路模块45；上述示例一至示例四中，并未对第二支路功率放大器44输出至合路模块45的信号的形式做限定，第二支路功率放大器44可以输出至少一路输出信号，这至少一路输出信号可以直接输入合路模块45，当然在该至少一路输出信号为多路时，也可以经过合路后送入合路模块45，下述实施例中以输出一路信号(当然，可能是第二支路功率放大器44仅输出一路输出信号或者是对多路输出信号经过合路后的一路信号)给合路模块为例进行说明。示例性的，第一支路功率放大器21可以至少包括以下各类型的功率放大器中的一种：单管功率放大器、Doherty功率放大器、希莱克斯Chireix功率放大器、异相Outphasing功率放大器、包络线跟踪ET功率放大器。第二支路功率放大器22可以至少包括以下各类型的功率放大器中的一种： 单管功率放大器、Doherty功率放大器、Chireix功率放大器、Outphasing功率放大器、ET功率放大器。
基于上述的第一支路功率放大器的可能的结构以及第二支路功率放大器的可能的结构，本申请的实施对合路模块的示例性说明如下：
在一个示例中，参照图9所示，示出了一种第一支路功率放大器、第二支路功率放大器与合路模块的连接方式，其中合路模块45包括三端口器件；第一支路功率放大器43包括一个输出端口；第二支路功率放大器44包括一个输出端口；其中，三端口器件的第一端口连接第一支路功率放大器43的输出端口，第一支路功率放大器43具体用于对接收到的至少一路第一支路射频信号放大并输出至三端口器件的第一端口；需要说明的是，若第一支路功率放大器43仅包含一个第一子功率放大器，则将该第一子功率放大器的输出信号输出，若第一支路功率放大器43包括两个以上的第一子功率放大器，则还需将该两个以上的第一子功率放大器的输出信号合路，其中该两个以上的第一子功率放大器可以参考上述图5示出的示例一或者图7示出的示例三的结构组成第一支路功率放大器；三端口器件的第三端口连接第二支路功率放大器44的输出端口，第二支路功率放大器44具体用于对接收到的至少一路第二支路射频信号放大并输出至所述三端口器件的第三端口；需要说明的是，若第二支路功率放大器44仅包含一个第二子功率放大器，则将该第二子功率放大器的输出信号输出，若第二支路功率放大器44包括两个以上的第二子功率放大器，则还需将该两个以上的第二子功率放大器的输出信号合路，其中该两个以上的第二子功率放大器可以参考上述图6示出的示例二或者图8示出的示例四的结构组成第二支路功率放大器；三端口器件用于根据第三端口接收的信号对所述第一端口接收的信号进行调整，并通过所述三端口器件的第二端口输出。其中，一种典型的三端口器件为环形器。如图9所示，三端口器件采用环形器实现，环形器的3端口网络实现了端口3到端口1的(近似)单向传输，端口1到端口2的(近似)单向传输，从而，通过改变端口3的输入(电流)调整端口1所连接电路的输出阻抗的作用，在一些示例中环形器的端口1也被称为输入端，端口2也被称为输出端，端口3也被称为隔离端。
具体的，环形器的3个端口处的电流和电压分别为：
I 1＝I 2-I 3
I 2＝I 1+I 3
V 3＝I 3·Z 0
V 2＝I 2·Z 0＝Z 0(I 1+I 3)
V 1＝(I 3·Z 0)+(I 2·Z 0)＝Z 0(I 1+2I 3)
其中，V 1为端口1处的电压，I 1为端口1处的电流，V 2为端口2处的电压，I 2为端口2处的电流，I 3为端口3处的电压，V 3为端口3处的电流，Z 0为环形器的特征阻抗。
则，第一支路功率放大器21输出阻抗为：
Figure PCTCN2017118071-appb-000001
通过改变第二支路功率放大器44的输出电流I 3的相位和幅度，可以实现对第一支路功率放大器43的负载牵引，从而可实现功率放大器在大功率回退下的高效率工作。
如图10所示，第一支路功率放大器43可以包含两支路的Doherty功率放大器，其输入第一支路射频信号，第二支路功率放大器44为B类单管功率放大器，其输入第二支路射频信号。其中Doherty功率放大器包括功率分配器g(divider，该功率分配器可以使用电桥)、主功率放大器(main PA)和峰化功率放大器(peak PA或者auxiliary PA，副功率放大器)，其中功率分配器g、主功率放大器(main PA)和峰化功率放大器(peak PA)通过阻抗匹配网络连接至环形器45的端口1。功率分配器g将第一支路射频信号分为两路分别传输至主功率放大器(main PA)和峰化功率放大器(peak PA)。可选的，阻抗匹配网络包括设置于功率分配器g和主功率放大器(main PA)之间的输入阻抗匹配电路c1、设置于功率分配器g和峰化功率放大器(peak PA)之间的输入阻抗匹配电路c2、设置于主功率放大器(main PA)输出端的第一输出阻抗变换电路c3、设置于峰化功率放大器(peak PA)输出端的第二输出阻抗变换电路c4，以及将第一输出阻抗变换电路c3以及第二输出阻抗变换电路c4连接至环形器23的端口1的输出阻抗匹配电路c5。第二支路功率放大器44为B类单管功率放大器，其基波电压幅度越大，输出功率越大，功率放大器电路效率越大。而在小功率输入时，Doherty功率放大器效率曲线与B类单管功率放大器相似；大功率输出时，峰化功率放大器(peak PA)开启，功率放大器电路在回退范围保持较高效率。而功率放大器电路的总效率η 3由两个支路功率放大器的效率和总的功率比决定：
Figure PCTCN2017118071-appb-000002
其中，第一支路功率放大器43的效率为η 1、第二支路功率放大器44的效率为η 2；第一支路功率放大器43的总的功率为P 1、第二支路功率放大器44的总的功率P 2，其中，
Figure PCTCN2017118071-appb-000003
为获得高效率，要保证
Figure PCTCN2017118071-appb-000004
为实数，即要求第一支路功率放大器43的Doherty功率放大器的输出电流和第二支路功率放大器22的B类单管功率放大器的输出电流同相或者反相。通过控制第二支路功率放大器22的输出电流，实现第一支路功率放大器43和第二支路功率放大器44分别处于高效点或零输出功率状态，即可实现功率放大器电路的高效输出，由于本申请的实施例中输入第一支路功率放大器43的至少一路第一支路射频信号中的任一射频信号与输入第二支路功率放大器44的的至少一路第二支路射频信号中的任一射频信号不同；因此，只要独立调节输入第一支路功率放大器的至少一路第一支路射频信号以及输入第二支路功率放大器的至少一路第二支路射频信号，即可实现两支路功率放大器接收的射频信号中各个射频信号的相位和幅度满足使得两支路分别处于高效点或零输出功率状态，使得功率放大器电路的输出效率达到最大，即在本申请的方案中为两个支路功率放大器的信号提供了更灵活的调节方式，因此更 加有利于提高信号处理电路功率放大的效率。
以图10所示的实施例为例，以第一支路功率放大器的Doherty功率放大器的Main PA、Peaking PA、第二支路功率放大器的B类单管功率放大器饱和输出功率比为12：12:1的情况为例(该功率比可为任意比值，并不限于此例)，对信号处理电路的功率放大电路各部分的特征数据仿真如图11-15：两支路上Main PA、Peak PA和B类单管功率放大器的漏极电流Idrain与线性回退电压Vout的关系，如图11所示；漏极电压Vdrain与线性回退电压Vout的关系，如图12所示；回退情况下的效率曲线，如图13所示，其中横轴为回退功率，单位为dB(Backoff Power)，纵轴为漏极输出效率(Drain Efficiency)；在线性回退情况下的效率曲线，如图14所示，其中横轴为回退电压Vout，纵轴为漏极输出效率(Drain Efficiency)；两支路上Main PA、Peak PA和B类单管功率放大器线性负载牵引比与线性回退的关系，如图15所示。根据图11-15可以看出，通过调节两个支路上第一支路射频信号以及第二支路射频信号的信号幅度和相位，在大功率回退时，可以获得4个以上高效率点。
其中，如图10所示的Doherty功率放大器可以替换为Adoherty(Asymmetric Doherty，非对称多尔蒂)功率放大器或者希莱克斯Chireix功率放大器。
可选的，本申请实施例中的第二支路功率放大器还可以替换为其他类型的单管功率放大器、Doherty功率放大器、Chireix功率放大器、Outphasing功率放大器、或者ET功率放大器，也可以包含上述功率放大器中的至少一种。
如图16所示，提供了一种3支路的Doherty功率放大器或者Chireix功率放大器的结构示意图；其结构与图10所示的第一支路功率放大器的2支路的Doherty功率放大器类似，其包含一个主功率放大器(main PA)和两个峰化功率放大器(peak1 PA和peak2 PA)，以及阻抗匹配网络；如图17所示，提供了一种4支路的Doherty功率放大器或者Chireix功率放大器的结构示意图；其包含一个主功率放大器(main PA)和三个峰化功率放大器(peak1 PA、peak2 PA和peak3 PA)，以及阻抗匹配网络；如图18所示，提供了一种异相Outphasing功率放大器的结构示意图；其包含：信号分离器(signal component separator)、两个功率放大器(PA1和PA2)和异相组合器(outphasing combiner)。
如图19所示，提供了现有技术方案中的3支路的Doherty功率放大器的回退功率和漏极输出效率曲线，以及本申请的实施例提供的功率放大器的回退功率和漏极输出效率曲线，其中“本申请方案一”以本申请实施例中第一支路功率放大器采用AB类功率放大器，第二支路功率放大器采用B类单管功率放大器为例；“本申请方案二”以本申请实施例中第一支路功率放大器采用2支路的Doherty功率放大器，第二支路功率放大器采用B类单管功率放大器为例；通过控制两个支路功率放大器输入的射频信号的相位和幅度，实现第二支路功率放大器对第一支路功率放大器的负载牵引，实现更大功率回退下的高效率工作。第一支路功率放大器总的峰值功率和第二支路功率放大器的总的峰值功率比值a与整个功率放大器电路的工作的回退范围有关，此比值越大，功率放大器电路的回退范围越大，且理论最大回退范围为10*lg(a+1)。且此比值影响回退范围内可获得高效率点(极 值点)的个数，当比值大于3小于8时，可获得3个高效率极值点；此比值大于8时，可获得4个高效率极值点。
如图20所示，“现有技术方案曲线1”提供了现有技术中3支路的Doherty功率放大器回退功率与main PA的负载牵引比(LPR，Load pull ratio)的曲线；“现有技术方案曲线2”提供了现有技术中3支路的Doherty功率放大器的回退功率与peak1 PA的LPR的曲线；”现有技术方案曲线3”提供了现有技术中3支路的Doherty PA的回退功率与peak2 PA的LPR的曲线；”本申请方案一曲线1”提供了本申请实施例中第一支路功率放大器采用的AB类功率放大器的回退功率与第二支路功率放大器的LPR的曲线；”本申请方案一曲线2”提供了本申请实施例中第一支路功率放大器采用的AB类功率放大器的回退功率与第一支路功率放大器的LPR的曲线；“本申请方案二曲线1”提供了本申请实施例中第一支路功率放大器采用的2支路的Doherty功率放大器的回退功率与第二支路功率放大器的LPR的曲线；“本申请方案二曲线2”提供了本申请实施例中第一支路功率放大器采用的2支路的Doherty功率放大器的回退功率与第一支路功率放大器的main PA LPR的曲线；“本申请方案二曲线3”提供了本申请实施例中第一支路功率放大器采用的2支路的Doherty功率放大器的回退功率与第一支路功率放大器的peak PA LPR的曲线的曲线；第一支路功率放大器采用的AB类功率放大器或2支路的Doherty功率放大器的方案可在更大的功率回退下获得更多的高效率点，且第一支路功率放大器中每一功率管的负载牵引要比现有技术的3支路的Doherty功率放大器的功率管小。实际使用中，每一路的功率放大器的工作效率和负载牵引比有关，负载牵引比越小，每一路的功率放大器的工作效率越高。
在另一个示例中，参照图21所示，三端口器件45包括第一隔离器451和第二隔离器452；其中，第一隔离器451的输入端连接三端口器件的第一端口(端口1)，第一隔离器的输出端连接三端口器件的第二端口(端口2)；第二隔离器452的输入端连接三端口器件的第三端口(端口3)；第二隔离器的输出端连接三端口器件的第一端口(端口1)。其中由于隔离器的单向导通作用，因此实现了与环形器类似的功能。具体的，第二隔离器452用于将三端口器件的第三端口接收的信号传输至第一隔离器的输入端；第一隔离器451用于根据三端口器件的第三端口接收的信号对三端口器件的第一端口接收的信号进行调整，并通过三端口器件的第二端口输出。
此外，合路模块45还可以为四端口器件，该四端口器件可以为鼠笼式耦合器rat-race或电桥；参照图22所示，第一支路功率放大器43包括第一输出端口和第二输出端口；第二支路功率放大器44包括一个输出端口；
第一支路功率放大器43的第一输出端口连接四端口器件的第一端口(端口1)；第一支路功率放大器43的第二输出端口连接四端口器件的第二端口(端口2)；第二支路功率放大器44的输出端口连接四端口器件的第三端口(端口3)；
第一支路功率放大器43具体用于接收至少两路第一支路射频信号，对接收到的至少两路第一射频信号分别放大并分别输出至四端口器件的第一端口和第二端口；如图22所示，示例性，第一支路功率放大器43包括第一子功率放大器G1和 第一子功率放大器G2，并且一路第一支路射频信号通过第一子功率放大器G1放大输出，另一路第一支路射频信号通过第一子功率放大器G2放大输出；第二支路功率放大器44具体用于对接收到的至少一路第二支路射频信号(n1-nk)放大输出至四端口器件的第三端口；四端口器件用于根据第三端口接收的信号对第一端口接收的信号以及第二端口接收的信号进行调整，将调整后的第一端口接收的信号和所述第二端口接收的信号合路输出至四端口器件的第四端口(端口4)。可选的，当第一支路功率放大器包含更多的子功率放大器，或者对多于两路射频信号进行放大时，还可以对放大后的多路射频信号中的部分或者全部射频信号进行合路，得到两路射频信号，分别输出至所述四端口器件的第二端口和第三端口。可选的，当第二支路功率放大器包含多于一个子功率放大器，或者对多于一路的射频信号进行放大时，还可以对放大后的多于一路射频信号进行合路，得到一路合路后的射频信号，并输出至所述四端口器件的第三端口。
四端口器件采用电桥时，第一子功率放大器G1输出的第一输出信号和第一子功率放大器G2输出的第二输出信号幅度相同，相位相差90°，第一子功率放大器G1的输出端和第一子功率放大器G2的输出端分别接电桥的耦合端(coupled port)和直通端(direct port)，第一输出信号和第二输出信号合路从输入端(input port)输出，隔离端(isolated)无信号输出；第二支路的功率放大器44输出的合路信号从隔离端(isolated)输入，分路成两路幅度相同，相位差90度的信号，从耦合端(coupled port)和直通端(direct port)，输入端(input port)无输出。从而实现了从隔离端到耦合端、直通端，从耦合端、直通端到隔离端的(近似)单向传输。这样通过隔离端(isolated)输入的合路信号分成的两路信号分别对耦合端(coupled port)和直通端(direct port)输入的第一输出信号和第二输出信号进行调整，并将调整后的第一输出信号和第二输出信号合路通过电桥的输入端(input port)输出。
此外，合路模块45采用四端口器件时，参照图24所示，第一支路功率放大器43若仅接收一路第一支路射频信号，则第一支路功率放大器43包括信号分离器431、第一子功率放大器432和第二子功率放大器433；其中，信号分离器431的输入端口射频信号转换模块42，接收一路第一支路射频信号；信号分离器431的第一输出端口连接第一子功率放大器432的输入端口，第一子功率放大器432的输出端口连接四端口器件的第一端口；信号分离器433的第二输出端口连接第一子功率放大器433的输入端口，第一子功率放大器433的输出端口连接四端口器件的第二端口；信号分离器431用于将一路第一支路射频信号分离成至少两路射频信号并分别输入第一子功率放大器432和第一子功率放大器433；第二支路功率放大器44的输出端口连接四端口器件的第三端口，具体用于对接收到的至少一路第二射频信号放大并合路输出至四端口器件的第三端口；四端口器件根据第三端口接收的信号对第一端口接收的信号以及第二端口接收的信号进行调整，将调整后的第一端口接收的信号和所述第二端口接收的信号合路输出至四端口器件的第四端口。其中，信号分离器431可以采用电桥。
尽管在此结合各实施例对本申请进行了描述，然而，在实施所要求保护的本申请 过程中，本领域技术人员通过查看所述附图、公开内容、以及所附权利要求书，可理解并实现所述公开实施例的其他变化。在权利要求中，“包括”(comprising)一词不排除其他组成部分或步骤，“一”或“一个”不排除多个的情况。单个处理器或其他单元可以实现权利要求中列举的若干项功能。相互不同的从属权利要求中记载了某些措施，但这并不表示这些措施不能组合起来产生良好的效果。所述作为分离部件说明的单元或模块可以是或者也可以不是物理上分开的，例如上述的支路功率放大器、信号分离器、合路模块(三端口器件、四端口器件)等等可以物理上集成于一个芯片或电路中实现。
以上所述，仅为本申请的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应所述以权利要求的保护范围为准。

Claims (15)

  1. 一种信号处理电路，其特征在于，包括：分路模块、射频信号转换模块、第一支路功率放大器、第二支路功率放大器以及合路模块；所述分路模块连接所述射频信号转换模块，所述射频信号转换模块连接所述第一支路功率放大器和所述第二支路功率放大器，所述第一支路功率放大器和所述第二支路功率放大器连接所述合路模块；其中，
    所述分路模块，用于接收第一数字信号，根据所述第一数字信号的输入功率将所述第一数字信号分成至少一路第一支路数字信号和至少一路第二支路数字信号，输出所述至少一路第一支路数字信号和所述至少一路第二支路数字信号给所述射频信号转换模块，其中，所述至少一路第一支路数字信号的幅度和所述至少一路第二支路数字信号的幅度的比值随所述第一数字信号的输入功率变化，和/或所述至少一路第一支路数字信号和所述至少一路第二支路数字信号的相位差随所述第一数字信号的输入功率变化；
    所述射频信号转换模块，用于将所述至少一路第一支路数字信号和至少一路第二支路数字信号转换成至少一路第一支路射频信号和至少一路第二支路射频信号并输出；
    所述第一支路功率放大器用于对接收到的所述至少一路第一支路射频信号放大输出至所述合路模块；所述第二支路功率放大器用于对接收到的所述至少一路第二支路射频信号放大并输出至所述合路模块；
    所述合路模块用于接收所述第一支路功率放大器输出的至少一路输出信号以及所述第二支路功率放大器输出的至少一路输出信号，根据所述第二支路功率放大器输出的至少一路输出信号对所述第一支路功率放大器输出的至少一路输出信号进行调整并输出。
  2. 根据权利要求1所述的信号处理电路，其特征在于，所述第一支路功率放大器包括第一信号分离器和至少两个与所述第一信号分离器相连接的第一子功率放大器；
    所述第一信号分离器的输入端连接所述射频信号转换模块，接收一路所述第一支路射频信号，所述第一信号分离器的至少两个输出端分别连接一个所述第一子功率放大器；
    所述第一信号分离器用于将一路所述第一支路射频信号分离成至少两路射频信号并输出。
  3. 根据权利要求1或2所述的信号处理电路，其特征在于，所述第二支路功率放大器包括第二信号分离器和至少两个与所述第二信号分离器相连接的第二子功率放大器；
    所述第二信号分离器的输入端连接所述射频信号转换模块，接收一路所述第二支路射频信号，所述第二信号分离器的至少两个输出端分别连接一个所述第二子功率放大器；
    所述第二信号分离器用于将一路所述第二支路射频信号分离成至少两路射频 信号并输出。
  4. 根据权利要求1-3任一项所述的信号处理电路，其特征在于，所述第一支路功率放大器包括至少一个第一子功率放大器，所述至少一个第一子功率放大器中的任意一个第一子功率放大器的输入端连接所述射频信号转换模块，接收一路所述第一支路射频信号。
  5. 根据权利要求1-4任一项所述的信号处理电路，其特征在于，所述第二支路功率放大器包括至少一个第二子功率放大器，所述至少一个第二子功率放大器中的任一第二子功率放大器的输入端连接所述射频信号转换模块，接收一路所述第二支路射频信号。
  6. 根据权利要求1-5任一项所述的信号处理电路，其特征在于，所述合路模块包括三端口器件；所述第一支路功率放大器包括一个输出端口；所述第二支路功率放大器包括一个输出端口；
    其中，所述三端口器件的第一端口连接所述第一支路功率放大器的输出端口，所述第一支路功率放大器具体用于对接收到的至少一路第一支路射频信号放大输出至所述三端口器件的第一端口；
    所述三端口器件的第三端口连接所述第二支路功率放大器的输出端口，所述第二支路功率放大器具体用于对接收到的至少一路第二支路射频信号放大并输出至所述三端口器件的第三端口；
    所述三端口器件用于根据所述第三端口接收的信号对所述第一端口接收的信号进行调整，并通过所述三端口器件的第二端口输出。
  7. 根据权利要求6所述的信号处理电路，其特征在于，所述三端口器件包括环形器。
  8. 根据权利要求6所述的信号处理电路，其特征在于，所述三端口器件包括第一隔离器和第二隔离器；
    其中，所述第一隔离器的输入端连接所述三端口器件的第一端口，所述第一隔离器的输出端连接所述三端口器件的第二端口；
    所述第二隔离器的输入端连接所述三端口器件的第三端口；所述第二隔离器的输出端连接所述三端口器件的第一端口；
    所述第二隔离器用于将所述三端口器件的第三端口接收的信号传输至所述第一隔离器的输入端；
    所述第一隔离器用于根据所述三端口器件的第三端口接收的信号对所述三端口器件的第一端口接收的信号进行调整，并通过所述三端口器件的第二端口输出。
  9. 根据权利要求1-5任一项所述的信号处理电路，其特征在于，
    所述合路模块包括四端口器件；所述第一支路功率放大器包括第一输出端口和第二输出端口；所述第二支路功率放大器包括一个输出端口；
    所述第一支路功率放大器的第一输出端口连接所述四端口器件的第一端口；所述第一支路功率放大器的第二输出端口连接所述四端口器件的第二端口；所述第二支路功率放大器的输出端口连接所述四端口器件的第三端口；
    所述第一支路功率放大器具体用于接收至少两路第一支路射频信号，对接收 到的所述至少两路第一支路射频信号分别放大并分别输出至所述四端口器件的第一端口和第二端口；
    所述第二支路功率放大器具体用于对接收到的至少一路第二支路射频信号放大输出至所述四端口器件的第三端口；
    所述四端口器件用于根据所述第三端口接收的信号对所述第一端口接收的信号以及所述第二端口接收的信号进行调整，将调整后的所述第一端口接收的信号和所述第二端口接收的信号合路输出至所述四端口器件的第四端口。
  10. 根据权利要求9所述的信号处理电路，其特征在于，所述四端口器件包括鼠笼式耦合器rat-race和电桥中的至少一种。
  11. 根据权利要求1-10任一项所述的信号处理电路，其特征在于，所述第一支路功率放大器包括以下各类型的功率放大器中的至少一种：单管功率放大器、多尔蒂Doherty功率放大器、希莱克斯Chireix功率放大器、异相Outphasing功率放大器、包络线跟踪ET功率放大器。
  12. 根据权利要求1-11任一项所述的信号处理电路，其特征在于，所述第二支路功率放大器包括以下各类型的功率放大器中的至少一种：单管功率放大器、Doherty功率放大器、Chireix功率放大器、Outphasing功率放大器、ET功率放大器。
  13. 根据权利要求1-12任一项所述的信号处理电路，其特征在于，所述第一支路功率放大器包括Doherty功率放大器，和/或，所述第二支路功率放大器包括Doherty功率放大器。
  14. 一种射频信号发射机，其特征在于，包括：如权利要求1-13任一项所述的信号处理电路。
  15. 一种通信设备，其特征在于，包括：如权利要求14所述的射频信号发射机。
PCT/CN2017/118071 2017-12-22 2017-12-22 一种信号处理电路、射频信号发射机和通信设备 Ceased WO2019119436A1 (zh)

Priority Applications (5)

Application Number Priority Date Filing Date Title
PCT/CN2017/118071 WO2019119436A1 (zh) 2017-12-22 2017-12-22 一种信号处理电路、射频信号发射机和通信设备
EP17935244.8A EP3720004B1 (en) 2017-12-22 2017-12-22 Signal processing circuit, radio frequency signal transmitter, and communication device
BR112020012575-0A BR112020012575A2 (pt) 2017-12-22 2017-12-22 circuito de processamento de sinal, transmissor de sinal de radiofrequência, e dispositivo de comunicações
CN201780097831.7A CN111566940B (zh) 2017-12-22 2017-12-22 一种信号处理电路、射频信号发射机和通信设备
US16/908,321 US11444362B2 (en) 2017-12-22 2020-06-22 Signal processing circuit, radio frequency signal transmitter, and communications device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2017/118071 WO2019119436A1 (zh) 2017-12-22 2017-12-22 一种信号处理电路、射频信号发射机和通信设备

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US16/908,321 Continuation US11444362B2 (en) 2017-12-22 2020-06-22 Signal processing circuit, radio frequency signal transmitter, and communications device

Publications (1)

Publication Number Publication Date
WO2019119436A1 true WO2019119436A1 (zh) 2019-06-27

Family

ID=66992898

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/118071 Ceased WO2019119436A1 (zh) 2017-12-22 2017-12-22 一种信号处理电路、射频信号发射机和通信设备

Country Status (5)

Country Link
US (1) US11444362B2 (zh)
EP (1) EP3720004B1 (zh)
CN (1) CN111566940B (zh)
BR (1) BR112020012575A2 (zh)
WO (1) WO2019119436A1 (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112886999A (zh) * 2021-01-25 2021-06-01 维沃移动通信有限公司 射频电路、电子设备及射频控制方法
CN114844469A (zh) * 2021-02-02 2022-08-02 大唐移动通信设备有限公司 一种功率控制系统及控制方法
CN120275754A (zh) * 2025-05-29 2025-07-08 中国电子科技集团公司第二十九研究所 一种射频资源动态调配测试系统和方法

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108599785B (zh) * 2018-03-30 2019-11-19 维沃移动通信有限公司 基于毫米波通信的射频系统、发射功率的调整方法及终端
JP7337270B2 (ja) * 2020-06-04 2023-09-01 三菱電機株式会社 ドハティ増幅器
CN113064368B (zh) * 2021-03-18 2022-03-08 科海技术股份有限公司 一种大功率射频电源系统
CN115347903A (zh) * 2021-05-13 2022-11-15 中国电信股份有限公司 移频分布近端机、系统和信号移频处理方法
CN116707564A (zh) * 2022-02-25 2023-09-05 华为技术有限公司 射频前端电路和电子设备
CN115297490A (zh) * 2022-07-27 2022-11-04 欧智通科技股份有限公司 一种扩展wi-fi辐射范围的装置
CN119137859A (zh) * 2022-08-01 2024-12-13 华为技术有限公司 一种功率放大装置、射频拉远单元、基站以及通信系统
WO2024082114A1 (zh) * 2022-10-18 2024-04-25 华为技术有限公司 一种功放设备、射频拉远单元及基站
CN115765781B (zh) * 2022-11-28 2026-04-14 国网河南省电力公司南阳供电公司 变电站超高频rfid读写装置及读写方法
EP4677740A1 (en) * 2023-06-01 2026-01-14 Huawei Technologies Co., Ltd. Power amplifier for reduced load pull ratio
CN119966370A (zh) * 2023-11-09 2025-05-09 上海华为技术有限公司 一种功率放大电路、射频生成设备和通信系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101640562A (zh) * 2009-08-17 2010-02-03 中兴通讯股份有限公司 多输入多输出系统和方法
KR20110033383A (ko) * 2009-09-25 2011-03-31 전자부품연구원 클래스 ｆ 및 인버스 클래스 ｆ 도허티 증폭기
CN103518331A (zh) * 2013-04-24 2014-01-15 华为技术有限公司 发射机和用于信号发射的方法
CN106452370A (zh) * 2016-10-12 2017-02-22 杭州电子科技大学 一种基于非对称结构的高回退Doherty功率放大器及其实现方法
CN106506014A (zh) * 2015-09-06 2017-03-15 中兴通讯股份有限公司 发射机及信号输出方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6054894A (en) * 1998-06-19 2000-04-25 Datum Telegraphic Inc. Digital control of a linc linear power amplifier
JP4786021B2 (ja) 2000-09-05 2011-10-05 三菱電機株式会社 高周波増幅器、フィードフォワード増幅器および歪み補償増幅器
US20050134377A1 (en) * 2003-12-23 2005-06-23 Dent Paul W. Doherty amplifier
US7961045B2 (en) * 2007-03-30 2011-06-14 Nortel Networks Limited Amplifier pre-distortion systems and methods
US8837629B2 (en) * 2011-05-11 2014-09-16 Fadhel M Ghannouchi Extended bandwidth digital Doherty transmitter
US9571042B2 (en) * 2012-07-26 2017-02-14 Telefonaktiebolaget L M Ericsson (Publ) Digital upconversion for multi-band multi-order power amplifiers
CN104704747B (zh) * 2012-07-31 2017-08-25 F·甘诺奇 扩展带宽的数字多尔蒂发射机
US8824978B2 (en) * 2012-10-30 2014-09-02 Eta Devices, Inc. RF amplifier architecture and related techniques
CN105375883B (zh) * 2014-08-13 2020-10-30 天工方案公司 具有可调阻抗终端电路的多尔蒂功率放大器组合器
US9787259B2 (en) * 2015-11-06 2017-10-10 Infineon Technologies Ag Outphasing power amplifier signal splitter using next stage input impedance and multiple biasing
CN106374863B (zh) * 2016-10-12 2019-01-01 杭州电子科技大学 一种提高功率回退动态范围的Doherty功率放大器及其实现方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101640562A (zh) * 2009-08-17 2010-02-03 中兴通讯股份有限公司 多输入多输出系统和方法
KR20110033383A (ko) * 2009-09-25 2011-03-31 전자부품연구원 클래스 ｆ 및 인버스 클래스 ｆ 도허티 증폭기
CN103518331A (zh) * 2013-04-24 2014-01-15 华为技术有限公司 发射机和用于信号发射的方法
CN106506014A (zh) * 2015-09-06 2017-03-15 中兴通讯股份有限公司 发射机及信号输出方法
CN106452370A (zh) * 2016-10-12 2017-02-22 杭州电子科技大学 一种基于非对称结构的高回退Doherty功率放大器及其实现方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3720004A4 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112886999A (zh) * 2021-01-25 2021-06-01 维沃移动通信有限公司 射频电路、电子设备及射频控制方法
CN112886999B (zh) * 2021-01-25 2021-10-26 维沃移动通信有限公司 射频电路、电子设备及射频控制方法
CN114844469A (zh) * 2021-02-02 2022-08-02 大唐移动通信设备有限公司 一种功率控制系统及控制方法
CN114844469B (zh) * 2021-02-02 2025-09-12 大唐移动通信设备有限公司 一种功率控制系统及控制方法
CN120275754A (zh) * 2025-05-29 2025-07-08 中国电子科技集团公司第二十九研究所 一种射频资源动态调配测试系统和方法

Also Published As

Publication number Publication date
CN111566940A (zh) 2020-08-21
CN111566940B (zh) 2021-08-13
US20200321673A1 (en) 2020-10-08
EP3720004B1 (en) 2025-08-27
BR112020012575A2 (pt) 2020-11-24
EP3720004A4 (en) 2020-12-16
EP3720004A1 (en) 2020-10-07
US11444362B2 (en) 2022-09-13

Similar Documents

Publication Publication Date Title
CN111566940B (zh) 一种信号处理电路、射频信号发射机和通信设备
JP6501322B2 (ja) 電力増幅器、リモート無線ユニット、及び基地局
Hasin et al. Exploiting phase for extended efficiency range in symmetrical Doherty power amplifiers
US8912846B2 (en) Doherty amplifier arrangement
CN104170267B9 (zh) 基于cmos的tx/rx开关
EP2945285A1 (en) Power amplifier, transceiver, and base station
US12603615B2 (en) Broadband Doherty power amplifier and implementation method thereof
CN106411275B (zh) 改善带宽的三路Doherty功率放大器及实现方法
CN113196669A (zh) 具有改善的效率和输出功率的rfdac（rf（射频）dac（数字到模拟转换器））
CN114915266A (zh) 射频放大电路和射频前端模组
Li et al. A 4.1 W quadrature Doherty digital power amplifier with 33.6% peak PAE in 28nm bulk CMOS
WO2013118367A1 (ja) 送信機および送信方法
RU2735905C1 (ru) Многокаскадный усилитель мощности догерти и передатчик
CN110199474B (zh) 一种功率放大装置、射频拉远单元及基站
CN211127730U (zh) 一种基于fpga的宽带异相功放发射系统
US10742240B2 (en) Signal processing method and device
CN107005200B (zh) 用于放大通信信号的放大系统
CN112119618B (zh) 用于发射器的信号处理装置和用于这种装置的方法
CN118160220A (zh) 功率放大装置和无线通信装置
CN118944613A (zh) 一种功率放大系统、发射装置及电子设备
KR20260039775A (ko) 전력 증폭 시스템, 무선 주파수 송신 시스템, 및 신호 송신 장치
Brahmachari et al. Low power 2.4 GHz RF transmitter for satellite subsystem using CORDIC based frequency translator
Chen High Efficiency IQ-sharing Transmitter

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: 17935244

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: 2017935244

Country of ref document: EP

Effective date: 20200701

REG Reference to national code

Ref country code: BR

Ref legal event code: B01A

Ref document number: 112020012575

Country of ref document: BR

ENP Entry into the national phase

Ref document number: 112020012575

Country of ref document: BR

Kind code of ref document: A2

Effective date: 20200619

WWG Wipo information: grant in national office

Ref document number: 2017935244

Country of ref document: EP