WO2017080492A1 - 一种本振泄漏信号校正的装置、方法及微处理机控制器 - Google Patents

一种本振泄漏信号校正的装置、方法及微处理机控制器 Download PDF

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Publication number
WO2017080492A1
WO2017080492A1 PCT/CN2016/105350 CN2016105350W WO2017080492A1 WO 2017080492 A1 WO2017080492 A1 WO 2017080492A1 CN 2016105350 W CN2016105350 W CN 2016105350W WO 2017080492 A1 WO2017080492 A1 WO 2017080492A1
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Prior art keywords
signal
local oscillator
digital
analog converter
microprocessor controller
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PCT/CN2016/105350
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English (en)
French (fr)
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纪腾腾
王俊鹏
丁斌
樊海明
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华为技术有限公司
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Priority to EP16863668.6A priority Critical patent/EP3367578B1/en
Publication of WO2017080492A1 publication Critical patent/WO2017080492A1/zh
Priority to US15/976,655 priority patent/US10615827B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/50—Circuits using different frequencies for the two directions of communication
    • H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/16—Multiple-frequency-changing
    • H03D7/165—Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0475—Circuits with means for limiting noise, interference or distortion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • 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
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/10—Monitoring; Testing of transmitters
    • H04B17/11—Monitoring; Testing of transmitters for calibration
    • H04B17/13—Monitoring; Testing of transmitters for calibration of power amplifiers, e.g. gain or non-linearity
    • 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
    • H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/36—Modulator circuits; Transmitter circuits
    • H04L27/362—Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated
    • H04L27/364—Arrangements for overcoming imperfections in the modulator, e.g. quadrature error or unbalanced I and Q levels
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0041—Functional aspects of demodulators
    • H03D2200/009—Reduction of local oscillator or RF leakage
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
    • H03F3/19—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
    • 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
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0491—Circuits with frequency synthesizers, frequency converters or modulators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0016—Stabilisation of local oscillators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0018—Arrangements at the transmitter end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0044—Control loops for carrier regulation
    • H04L2027/0053—Closed loops
    • 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
    • H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
    • H04L25/061—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing hard decisions only; arrangements for tracking or suppressing unwanted low frequency components, e.g. removal of dc offset

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a device, a method, and a microprocessor controller for correcting a local oscillator leakage signal.
  • the local oscillator leakage is a problem that must be paid attention to.
  • the local oscillator leakage is mainly caused by the DC component of the I/Q signals at the input of the mixer.
  • the local oscillator leakage will deteriorate the error vector amplitude of the useful signal. (Error Vector Magnitude, EVM), transmit power accuracy, transmit spurs, and linearity of the transmit link. Therefore, the local oscillator leakage must be handled.
  • a local oscillator filter is designed at the output of the mixer to filter out local oscillator leakage; however, in microwave applications, the implementation of filters that suppress LO leakage is very difficult. In addition, for direct upconversion systems, the local oscillator signal falls within the signal band and cannot be filtered out by the filter.
  • the embodiment of the present invention provides a device for correcting the local oscillator leakage signal, which can adjust the DC component of the quadrature signal I/Q at the input end of the mixer in real time, thereby reducing the local oscillator leakage.
  • Embodiments of the present invention also provide a corresponding method for correcting local oscillator leakage signals and a microprocessor controller.
  • a first aspect of the present invention provides a device for correcting a local oscillator leakage signal, comprising: a microprocessor controller, a first digital to analog converter, a second digital to analog converter, a mixer, a local oscillator signal providing device, and a signal output a line, a signal splitting device and a detector tube, the signal branching device being disposed in the signal output line;
  • microprocessor controller is coupled to the first digital to analog converter and the second digital to analog converter, the first digital to analog converter and the second digital to analog converter respectively a mixer connection, the first digital to analog converter and the second digital to analog converter for providing the mixer with orthogonal DC components VI and VQ for local oscillator leakage signal correction;
  • the local oscillator signal providing device is coupled to the mixer, and the local oscillator signal providing device is configured to provide a local oscillator signal to the mixer;
  • the mixer is connected to the signal output line, and the mixer is configured to output a local oscillator leakage signal to the signal output line;
  • One end of the detector tube is connected to the signal branching device, and the other end is connected to the microprocessor controller, the signal branching device is configured to separate the local oscillator leakage signal, and the detecting tube is used for detecting The local oscillator leakage signal;
  • the microprocessor controller is configured to control the first digital-to-analog converter and the second number when a detected value of a local oscillation leakage signal detected by the detecting tube exceeds a target value of a preset local oscillation leakage
  • the analog converter adjusts the output values of the VI and the VQ.
  • the apparatus for correcting the local oscillation leakage signal compared with the difficulty in filtering the local oscillation leakage signal in the prior art, establishes the microprocessor control through the signal dividing device and the detection tube.
  • the closed loop between the device and the signal output line allows real-time adjustment of the DC component of the quadrature signal I/Q at the mixer input, reducing LO leakage.
  • the apparatus further includes a local oscillator amplifier,
  • One end of the local oscillator amplifier is connected to the detector tube, and the other end is connected to the signal branching device, and the local oscillator amplifier is configured to amplify the local oscillator leakage signal separated by the signal branching device.
  • the addition of the local oscillator amplifier can further amplify the local oscillator leakage signal for the detection of the detection tube.
  • the signal output line includes a driving amplifier, a power amplifier, a first connecting line, a second connecting line, and a third a connection line
  • the first connection line is for connecting the driver amplifier and the mixer
  • the second connection line is for connecting the driver amplifier and the power amplifier
  • the third connection line is for connecting Connecting the power amplifier and the output device
  • the signal branching device is disposed on the first connection line, the second connection line, or the third connection line.
  • the signal output line when the signal splitting device is disposed on the first connecting line, the signal output line further includes filtering The filter is disposed between the signal splitter and the drive amplifier.
  • a fourth possible implementation when the signal splitting device is disposed on the third connecting line, the power amplifier does not turn off in the receiving time slot. .
  • the micro The processor controller is configured to read the detected value of the local oscillator leakage signal from the detector tube when determining that the current time slot of the transmitting link is a receiving time slot.
  • a second aspect of the present invention provides a method for correcting a local oscillation leakage signal, the method being applied to a communication transmission system, the communication transmission system comprising a microprocessor controller, a first digital to analog converter, and a second digital to analog converter a mixer, a local oscillator signal providing device, a signal output line, a signal shunt device, and a detector tube, wherein the signal shunt device is disposed in the signal output line; wherein the microprocessor controller is a first digital-to-analog converter and a second digital-to-analog converter, wherein the first digital-to-analog converter and the second digital-to-analog converter are respectively connected to the mixer, and the local oscillator signal provides a device and a device a mixer connection, the mixer being coupled to the signal output line, one end of the detector tube being coupled to the signal shunt device and the other end coupled to the microprocessor controller, the method comprising :
  • the microprocessor controller reads a detected value of the local oscillator leakage signal detected by the detecting tube from the detecting tube;
  • the microprocessor controller compares the detected value with a target value of a preset local oscillator leakage
  • the microprocessor controller controls to adjust the output of the first digital-to-analog converter and the second digital-to-analog converter to the mixer for the local oscillator when the detected value is greater than the target value
  • the leakage signal corrected quadrature DC components VI and VQ are provided.
  • the method for correcting the local oscillation leakage signal provided by the embodiment of the present invention can adjust the orthogonal signal I/Q of the input end of the mixer in real time as compared with the difficulty in filtering the local oscillation leakage signal in the prior art.
  • the DC component reduces the LO leakage.
  • the signal output line includes a driving amplifier, a power amplifier, a first connecting line, and a second connecting line, where the first connecting line is used for connecting a driver amplifier and the mixer, the second connection line is for connecting the driver amplifier and the power amplifier, and the signal branching device is disposed at the first connection line or the second connection line on;
  • the microprocessor controller reads the detected value of the local oscillator leakage signal detected by the detecting tube from the detecting tube, and specifically includes:
  • the microprocessor controller reads the detected value of the local oscillator leakage signal detected by the detector tube from the detector tube when the current time slot is a receiving time slot.
  • the local oscillator leakage signal is corrected in the receiving time slot, and the signal shunting device detects only the local oscillator leakage signal, and the detection result is accurate, the correction effect is excellent, and the system service is not affected.
  • a third aspect of the present invention provides a microprocessor controller, the microprocessor controller being applied to a communication transmitting system, the communication transmitting system further comprising a first digital to analog converter, a second digital to analog converter, and a mixing a local oscillator signal providing device, a signal output circuit, a signal shunt device and a detector tube, wherein the signal shunt device is disposed in the signal output line; wherein the microprocessor controller and the first number An analog converter is coupled to the second digital to analog converter, the first digital to analog converter and the second digital to analog converter are respectively coupled to the mixer, the local oscillator signal providing device and the mixing Connected to the signal output line, one end of the detector tube is connected to the signal branching device, and the other end is connected to the microprocessor controller, the microprocessor controller include:
  • a reading unit configured to read, from the detecting tube, a detected value of a local oscillation leakage signal detected by the detecting tube;
  • a comparison unit configured to compare the detected value read by the reading unit with a target value of a preset local oscillator leakage
  • control adjustment unit configured to control, when the comparison unit compares the detection value to be greater than the target value, to adjust the output of the first digital-to-analog converter and the second digital-to-analog converter to the mixer Orthogonal DC components VI and VQ for local oscillator leakage signal correction.
  • the third aspect of the embodiment of the present invention is compared with the difficulty in filtering the local oscillation leakage signal in the prior art, and the present invention
  • the method for correcting the local oscillator leakage signal provided by the embodiment can adjust the DC component of the quadrature signal I/Q at the input end of the mixer in real time, thereby reducing the LO leakage.
  • the signal output line includes a driving amplifier, a power amplifier, a first connecting line, and a second connecting line, where the first connecting line is used to connect the driving amplifier And the mixer, the second connection line is for connecting the driving amplifier and the power amplifier, and the signal branching device is disposed on the first connection line or the second connection line;
  • the reading unit is specifically configured to:
  • the detection value of the local oscillation leakage signal detected by the detector tube is read from the detector tube.
  • the local oscillator leakage signal is corrected in the receiving time slot, and the signal shunting device only detects the local oscillator leakage signal, the detection result is accurate, the correction effect is excellent, and the system service is not affected.
  • FIG. 1 is a schematic diagram of an embodiment of an apparatus for correcting a local oscillation leakage signal according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of another embodiment of an apparatus for correcting a local oscillation leakage signal according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of another embodiment of an apparatus for correcting a local oscillation leakage signal according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of another embodiment of an apparatus for correcting a local oscillation leakage signal according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of an embodiment of a method for correcting a local oscillation leakage signal according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of another embodiment of a method for correcting a local oscillation leakage signal according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of an embodiment of a microprocessor controller in an embodiment of the present invention.
  • Embodiments of the present invention provide a device for correcting a local oscillator leakage signal, which can adjust a DC component of a quadrature signal I/Q at a mixer input end in real time, thereby reducing local oscillator leakage.
  • Embodiments of the present invention also provide a corresponding method for correcting local oscillator leakage signals and a microprocessor controller. The details are described below separately.
  • the LO leakage is mainly caused by the DC component of the two I/Q quadrature signals at the input of the mixer
  • the LO leakage can be adjusted by adjusting the DC component of the I/Q signal. This is the LO leakage signal.
  • the technical principle of calibration is mainly caused by the DC component of the two I/Q quadrature signals at the input of the mixer.
  • FIG. 1 is a schematic diagram of an embodiment of an apparatus for correcting a local oscillation leakage signal in an embodiment of the present invention.
  • an embodiment of an apparatus for correcting local oscillator leakage signals includes:
  • Microprocessor Control Unit MCU
  • first digital to analog converter DAC
  • second digital to analog converter mixer
  • mixer Mcixer
  • local oscillator signal providing device Lical Oscillator
  • LO local oscillator signal providing device
  • signal output line signal shunt device and detector tube
  • signal shunt device is set in the signal output line.
  • the signal shunting device may be a coupler or a power splitter.
  • the signal shunting device is used to separate the local oscillator leakage signal, which means that the local oscillator leakage signal is taken out by means of coupler coupling, or passes through the power splitter. Take out the LO leakage signal.
  • the signal output circuit includes a driver amplifier (Dirver, DR), a power amplifier (PA), a first connection line, a second connection line, and a third connection line, and the first connection line is used to connect the driver amplifier and the mixer.
  • the second connection line is used to connect the driver amplifier and the power amplifier
  • the third connection line is used to connect the power amplifier and other output devices behind the power amplifier (not shown in FIG. 1).
  • the signal branching device is disposed on the first connection line, the second connection line, or the third connection line. As shown in FIG. 1, it can be set at the position of 1, 2 or 3 shown in FIG. 1. As long as one of the positions 1, 2 and 3 is provided with a signal branching device, the embodiment of the present invention can be implemented. Vibration correction.
  • the local oscillator leakage signal correction device may further include a local oscillator amplifier, and the local oscillator amplification One end of the device is connected to the detector tube, and the other end is connected to the signal branching device, and the local oscillator amplifier is used to amplify the local oscillator leakage signal separated by the signal branching device.
  • the local oscillator amplifier may or may not be. If there is a local oscillator amplifier, it will amplify the local oscillator leakage signal, which is more conducive to the detection of the detection tube.
  • the microprocessor controller is coupled to the first digital to analog converter and the second digital to analog converter, the first digital to analog converter and the second digital to analog converter are respectively coupled to the mixer, the first digital to analog converter and the second
  • the digital-to-analog converter is used to provide a quadrature DC component VI and VQ for the local oscillator leakage signal correction to the mixer, for example, as shown in FIG. 1, the first digital-to-analog converter provides a VI in the quadrature DC component, The two digital-to-analog converter provides VQ in the quadrature DC component. Alternatively, the first digital-to-analog converter can provide VQ in the quadrature DC component, and the second digital-to-analog converter provides the VI in the quadrature DC component. .
  • the VI is used to adjust the quadrature DC component I in the transmit link
  • the VQ is used to adjust the quadrature DC component Q in the transmit link.
  • the local oscillator signal supply device is connected to the mixer, and the local oscillator signal providing device is used to provide the local oscillator signal to the mixer; the local oscillator signal is orthogonally processed in the mixer to obtain a two-way version of 0° and 90°.
  • the oscillating signal, in the mixer, the two local oscillator signals can be mixed with the quadrature dc components I and Q in the transmit chain.
  • the mixer is connected to the signal output line, and the mixer is configured to output the local oscillator leakage signal to the signal output line.
  • the mixer in the transmitting time slot, the mixer outputs the main signal, and the main signal carries the local oscillator leakage signal.
  • the mixer In the receiving time slot, there is no main signal in the transmitting link, then the mixer only outputs the local oscillator leakage signal.
  • the signal branching device is used to separate the local oscillator leakage signal
  • the detecting tube is used for detecting the local oscillator leakage signal
  • the microprocessor controller is configured to control the first digital-to-analog converter and the second digital-to-analog converter to adjust VI and VQ when the detected value of the local oscillator leakage signal detected by the detecting tube exceeds a preset target value of the local oscillator leakage output value.
  • the target value of the local oscillator leakage is preset in the microprocessor controller. When the local oscillator leakage is small, no adjustment is needed. When the local oscillator leakage is greater than the target value, the VI and VQ can be adjusted. The quadrature DC components I and Q can be adjusted to reduce LO leakage.
  • a closed loop between the microprocessor controller and the signal output line is established by the signal splitting device and the detector tube, so that the DC component of the quadrature signal I/Q at the input end of the mixer can be adjusted in real time, and the DC component is reduced.
  • the local oscillator leaks.
  • the signal branching device can be placed at position 1, 2 or 3, and the case where the signal branching device is placed at positions 1, 2 or 3 below will be described with reference to the drawings.
  • the basic device of the device for correcting the local oscillator leakage signal provided by the embodiment of the present invention is substantially the same as that shown in FIG.
  • a filter can be placed between the signal splitting device and the driver amplifier. After the mixer outputs the local oscillator leakage signal, the signal splitting device can separate the main signal and the local oscillator leakage signal for a local oscillator leakage that is not separated. The signal can be filtered again by the filter to further reduce the local oscillator leakage signal in the main signal.
  • the basic device of the device for correcting the local oscillator leakage signal provided by the embodiment of the present invention is substantially the same as that shown in FIG.
  • the structure shown does not require a filter to be provided, which reduces the number of devices.
  • the basic device of the device for correcting the local oscillator leakage signal provided by the embodiment of the present invention is substantially the same as that shown in FIG.
  • the structure is more suitable for systems that do not shut down with the power amplifier at the receiving time slot.
  • the structure shown in FIG. 2 and FIG. 3 is applicable to the receiving time slot of the TDD system.
  • the PA is turned off and the transmitting signal is turned off.
  • the detecting tube only detects the local oscillator leakage signal. Stripped the influence of the main signal.
  • the local oscillator amplifier can be selected to have higher calibration efficiency and better calibration results.
  • the amplifier gain is the total gain of the amplifier experienced by the LO leakage signal.
  • the microprocessor controller uses The detection value of the local oscillation leakage signal is read from the detector tube when it is determined that the current time slot of the transmission link is a reception time slot. This will ensure that the calibration is better.
  • an embodiment of a method for correcting a local oscillator leakage signal includes:
  • the microprocessor controller reads, from the detection tube, a detected value of a local oscillation leakage signal detected by the detection tube, wherein the microprocessor controller is applied to a communication transmission system, and the communication transmission system further a first digital-to-analog converter, a second digital-to-analog converter, a mixer, a local oscillator signal providing device, a signal output line, a signal shunt device, and a detector tube, and the signal shunt device is disposed on the signal output line
  • the microprocessor controller is coupled to the first digital to analog converter and the second digital to analog converter, the first digital to analog converter and the second digital to analog converter respectively a mixer connection, the local oscillator signal providing device is connected to the mixer, the mixer is connected to the signal output line, one end of the detector tube is connected to the signal branching device, and the other end is Connected to the microprocessor controller.
  • the microprocessor controller compares the detected value with a target value of a preset local oscillator leakage.
  • the microprocessor controller controls to adjust, when the detected value is greater than the target value, an output that is output by the first digital-to-analog converter and the second digital-to-analog converter to the mixer.
  • the local oscillator leakage signal corrects the quadrature DC components VI and VQ.
  • the method for correcting the leakage signal of the local oscillator establishes a path between the microprocessor controller and the signal output line through the signal splitting device and the detecting tube.
  • the closed loop allows real-time adjustment of the DC component of the quadrature signal I/Q at the mixer input, reducing LO leakage.
  • the signal output line includes a driving amplifier, a power amplifier, and a a connection line for connecting the driver amplifier and the mixer, and a second connection line for connecting the driver amplifier and the power amplifier,
  • the signal branching device is disposed on the first connecting line or the second connecting line;
  • the microprocessor controller reads the detected value of the local oscillator leakage signal detected by the detecting tube from the detecting tube, and specifically includes:
  • the microprocessor controller reads the detected value of the local oscillator leakage signal detected by the detector tube from the detector tube when the current time slot is a receiving time slot.
  • the microprocessor controller begins to execute a time slot determination procedure.
  • the microprocessor controller determines whether the transmit link is currently in a receive time slot. If yes, go to step 203. If no, go to step 204.
  • the detection value of the local oscillator leakage signal of the detection tube is read from the detection tube.
  • the complete shutdown of the transmit link can be judged based on whether the PA is completely shut down.
  • the microprocessor controller maintains the values of VI and VQ unchanged.
  • the microprocessor controller determines whether the read detection value is greater than a preset target value. If yes, step 206 is performed, and if no, step 207 is performed.
  • the microprocessor controller adjusts the output values of the VI and the VQ.
  • the specific adjustment scheme may be stepwise adjustment, or may calculate the adjustment amount, one adjustment, and finally ensure that the detected value of the adjusted local oscillation leakage signal is smaller than the target value.
  • the microprocessor controller maintains the values of VI and VQ unchanged.
  • the local oscillator leakage signal is corrected in the receiving time slot, and the signal shunting device only detects the local oscillator leakage signal, the detection result is accurate, the correction effect is excellent, and the system service is not affected.
  • a microprocessor controller 30 according to an embodiment of the present invention is applied to a communication transmitting system, where the communication transmitting system further includes a first digital-to-analog converter, a second digital-to-analog converter, a mixer, and a local oscillator signal.
  • the signal shunt device is disposed in the signal output line; wherein the microprocessor controller and the first digital-to-analog converter and a second digital-to-analog converter connected, the first digital-to-analog converter and the second digital-to-analog converter are respectively connected to the mixer, and the local oscillator signal providing device is connected to the mixer, a mixer is connected to the signal output line, one end of the detector tube is connected to the signal branching device, and the other end is connected to the A microprocessor controller is coupled, the microprocessor controller comprising:
  • a reading unit 301 configured to read, from the detecting tube, a detected value of a local oscillation leakage signal detected by the detecting tube;
  • the comparing unit 302 is configured to compare the detected value read by the reading unit 301 with a target value of a preset local oscillator leakage
  • the control adjustment unit 303 is configured to control, when the comparison unit 302 compares the detection value to be greater than the target value, to adjust the first digital-to-analog converter and the second digital-to-analog converter to the mixing
  • the quadrature DC components VI and VQ for the local oscillator leakage signal correction are output.
  • the microprocessor controller provided by the embodiment of the invention can adjust the DC component of the quadrature signal I/Q at the input end of the mixer in real time, thereby reducing the leakage of the local oscillator. .
  • the signal output line includes a driving amplifier, a power amplifier, and a first connection. a second connection line for connecting the driver amplifier and the mixer, and a second connection line for connecting the driver amplifier and the power amplifier, the signal is divided
  • the circuit device is disposed on the first connection line or the second connection line;
  • the reading unit 301 is specifically configured to:
  • the detection value of the local oscillation leakage signal detected by the detector tube is read from the detector tube.
  • the MCU provided by the embodiment of the invention corrects the local oscillator leakage signal in the receiving time slot, and the signal dividing device only detects the local oscillator leakage signal, and the detection result is accurate, the correction effect is excellent, and the system service is not affected.
  • the communication transmitting system in the embodiment of the present invention can be understood by referring to the related descriptions in the sections of FIGS. 1 to 4.
  • the program may be stored in a computer readable storage medium, and the storage medium may include: ROM, RAM, disk or CD.
  • the device, the method and the microprocessor controller for correcting the local oscillator leakage signal provided by the embodiments of the present invention are described in detail.
  • the principles and implementation manners of the present invention are described in the following examples. The description is only for helping to understand the method of the present invention and its core idea; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in specific embodiments and application scopes. The contents of this specification are not to be construed as limiting the invention.

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Abstract

本发明公开了一种本振泄漏信号校正的装置，包括：微处理机控制器、第一数模转换器、第二数模转换器、混频器、本振信号提供器件、信号输出线路、信号分路器件和检波管，信号分路器件设置在信号输出线路中；第一数模转换器和第二数模转换器用于向混频器提供本振泄漏信号校正的正交直流分量VI和VQ；本振信号提供器件向混频器提供本振信号；混频器向信号输出线路输出本振泄漏信号；信号分路器件分离出本振泄漏信号，检波管检测本振泄漏信号；微处理机控制器在本振泄漏信号的检测值超过预先设置的目标值时，控制调整VI和VQ的输出值。本发明实施例提供的装置可以实时调整混频器输入端正交信号I/Q的直流分量，降低了本振泄漏。

Description

一种本振泄漏信号校正的装置、方法及微处理机控制器
本申请要求于2015年11月11日提交中国专利局、申请号为201510769409.4、发明名称为“一种本振泄漏信号校正的装置、方法及微处理机控制器”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，具体涉及一种本振泄漏信号校正的装置、方法及微处理机控制器。
背景技术
在通信发射系统中，本振泄露是一个必须重点关注的问题，本振泄露主要是由于混频器输入端I/Q两路信号的直流分量导致，本振泄露将恶化有用信号的误差向量幅度(Error Vector Magnitude，EVM)、发射功率精度、发射杂散及发射链路的线性等。因此，必须要对本振泄漏进行处理。
在典型应用中，在混频器的输出端设计本振滤波器来滤除本振泄露；但是，在微波应用中，抑制本振泄漏的滤波器的实现非常困难。另外，对于直接上变频系统，本振信号落在信号带内，无法通过滤波器滤除。
发明内容
为了解决现有技术中本振信号泄漏的问题，本发明实施例提供本振泄漏信号校正的装置，可以实时调整混频器输入端正交信号I/Q的直流分量，从而降低了本振泄漏。本发明实施例还提供了相应的本振泄漏信号校正的方法及微处理机控制器。
本发明第一方面提供一种本振泄漏信号校正的装置，包括：微处理机控制器、第一数模转换器、第二数模转换器、混频器、本振信号提供器件、信号输出线路、信号分路器件和检波管，所述信号分路器件设置在所述信号输出线路中；
其中，所述微处理机控制器与所述第一数模转换器和所述第二数模转换器连接，所述第一数模转换器和所述第二数模转换器分别与所述混频器连接，所述第一数模转换器和所述第二数模转换器用于向所述混频器提供用于本振泄漏信号校正的正交直流分量VI和VQ；
所述本振信号提供器件与所述混频器连接，所述本振信号提供器件用于向所述混频器提供本振信号；
所述混频器与所述信号输出线路连接，所述混频器用于向所述信号输出线路输出本振泄漏信号；
所述检波管的一端与所述信号分路器件连接，另一端与所述微处理机控制器连接，所述信号分路器件用于分离出所述本振泄漏信号，所述检波管用于检测所述本振泄漏信号；
所述微处理机控制器用于在所述检波管检测到的本振泄漏信号的检测值超过预先设置的本振泄漏的目标值时，控制所述第一数模转换器和所述第二数模转换器调整所述VI和所述VQ的输出值。
本发明实施例第一方面与现有技术中滤除本振泄漏信号困难相比，本发明实施例提供的本振泄漏信号校正的装置，通过信号分路器件和检波管建立了微处理机控制器与信号输出线路之间的闭环，从而可以实时调整混频器输入端正交信号I/Q的直流分量，降低了本振泄漏。
结合第一方面，在第一种可能的实现方式中，所述装置还包括本振放大器，
所述本振放大器的一端与所述检波管连接，另一端与所述信号分路器件连接，所述本振放大器用于放大所述信号分路器件分离出的所述本振泄漏信号。
在第一种可能的实现方式中，增加本振放大器可以进一步放大本振泄漏信号，便于检波管检测。
结合第一方面或第一方面第一种可能的实现方式，在第二种可能的实现方式中，所述信号输出线路包括驱动放大器、功率放大器、第一连接线、第二连接线和第三连接线，所述第一连接线用于连接所述驱动放大器和所述混频器，所述第二连接线用于连接所述驱动放大器和所述功率放大器，所述第三连接线用于连接所述功率放大器和输出器件；
所述信号分路器件设置在所述第一连接线、所述第二连接线或者所述第三连接线上。
结合第一方面第二种可能的实现方式，在第三种可能的实现方式中，当所述信号分路器件设置在所述第一连接线上时，所述信号输出线路还包括滤波 器，所述滤波器设置在所述信号分路器和所述驱动放大器之间。
结合第一方面第二种可能的实现方式，在第四种可能的实现方式中，当所述信号分路器件设置在所述第三连接线上时，所述功率放大器在接收时隙不关闭。
结合第一方面第二种可能的实现方式，在第五种可能的实现方式中，当所述信号分路器件设置在所述第一连接线或所述第二连接线上时，所述微处理机控制器用于在确定发射链路当前的时隙为接收时隙时，从所述检波管读取所述本振泄漏信号的检测值。
本发明第二方面提供一种本振泄漏信号校正的方法，所述方法应用于通信发射系统，所述通信发射系统包括微处理机控制器、第一数模转换器、第二数模转换器、混频器、本振信号提供器件、信号输出线路、信号分路器件和检波管，所述信号分路器件设置在所述信号输出线路中；其中，所述微处理机控制器与所述第一数模转换器和所述第二数模转换器连接，所述第一数模转换器和第二数模转换器分别与所述混频器连接，所述本振信号提供器件与所述混频器连接，所述混频器与所述信号输出线路连接，所述检波管的一端与所述信号分路器件连接，另一端与所述微处理机控制器连接，所述方法包括：
所述微处理机控制器从所述检波管读取所述检波管检测到的本振泄漏信号的检测值；
所述微处理机控制器将所述检测值与预先设置的本振泄漏的目标值进行比较；
所述微处理机控制器在所述检测值大于所述目标值时，控制调整所述第一数模转换器和所述第二数模转换器向所述混频器输出的用于本振泄漏信号校正的正交直流分量VI和VQ。
本发明实施例第二方面与现有技术中滤除本振泄漏信号困难相比，本发明实施例提供的本振泄漏信号校正的方法，可以实时调整混频器输入端正交信号I/Q的直流分量，降低了本振泄漏。
结合第二方面，在第一种可能的实现方式中，所述信号输出线路包括驱动放大器、功率放大器、第一连接线和第二连接线，所述第一连接线用于连接所 述驱动放大器和所述混频器，所述第二连接线用于连接所述驱动放大器和所述功率放大器，所述信号分路器件设置在所述第一连接线或者所述第二连接线上；
所述微处理机控制器从所述检波管读取所述检波管检测到的本振泄漏信号的检测值，具体包括：
所述微处理机控制器从所述检波管读取所述检波管检测到的本振泄漏信号的检测值之前，确定发射链路当前的时隙是否为接收时隙；
所述微处理机控制器在当前的时隙为接收时隙时，从所述检波管读取所述检波管检测到的本振泄漏信号的检测值。
第二方面第一种可能的实现方式中，在接收时隙校正本振泄漏信号，信号分路器件只检测本振泄露信号，检测结果精确，校正效果优，同时不影响系统业务。
本发明第三方面提供一种微处理机控制器，所述微处理机控制器应用于通信发射系统，所述通信发射系统还包括第一数模转换器、第二数模转换器、混频器、本振信号提供器件、信号输出线路、信号分路器件和检波管，所述信号分路器件设置在所述信号输出线路中；其中，所述微处理机控制器与所述第一数模转换器和所述第二数模转换器连接，所述第一数模转换器和第二数模转换器分别与所述混频器连接，所述本振信号提供器件与所述混频器连接，所述混频器与所述信号输出线路连接，所述检波管的一端与所述信号分路器件连接，另一端与所述微处理机控制器连接，所述微处理机控制器包括：
读取单元，用于从所述检波管读取所述检波管检测到的本振泄漏信号的检测值；
比较单元，用于将所述读取单元读取的检测值与预先设置的本振泄漏的目标值进行比较；
控制调整单元，用于在所述比较单元比较出所述检测值大于所述目标值时，控制调整所述第一数模转换器和所述第二数模转换器向所述混频器输出的用于本振泄漏信号校正的正交直流分量VI和VQ。
本发明实施例第三方面与现有技术中滤除本振泄漏信号困难相比，本发明 实施例提供的本振泄漏信号校正的方法，可以实时调整混频器输入端正交信号I/Q的直流分量，降低了本振泄漏。
结合第三方面，在第一种可能的实现方式中，所述信号输出线路包括驱动放大器、功率放大器、第一连接线和第二连接线，所述第一连接线用于连接所述驱动放大器和所述混频器，所述第二连接线用于连接所述驱动放大器和所述功率放大器，所述信号分路器件设置在所述第一连接线或者所述第二连接线上；
所述读取单元具体用于：
从所述检波管读取所述检波管检测到的本振泄漏信号的检测值之前，确定发射链路当前的时隙是否为接收时隙；
在当前的时隙为接收时隙时，从所述检波管读取所述检波管检测到的本振泄漏信号的检测值。
第三方面第一种可能的实现方式中，在接收时隙校正本振泄漏信号，信号分路器件只检测本振泄露信号，检测结果精确，校正效果优，同时不影响系统业务。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明实施例中本振泄漏信号校正的装置的一实施例示意图；
图2是本发明实施例中本振泄漏信号校正的装置的另一实施例示意图；
图3是本发明实施例中本振泄漏信号校正的装置的另一实施例示意图；
图4是本发明实施例中本振泄漏信号校正的装置的另一实施例示意图；
图5是本发明实施例中本振泄漏信号校正的方法的一实施例示意图；
图6是本发明实施例中本振泄漏信号校正的方法的另一实施例示意图；
图7是本发明实施例中微处理机控制器的一实施例示意图。
具体实施方式
本发明实施例提供一种本振泄漏信号校正的装置，可以实时调整混频器输入端正交信号I/Q的直流分量，从而降低了本振泄漏。本发明实施例还提供了相应的本振泄漏信号校正的方法及微处理机控制器。以下分别进行详细说明。
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
考虑到本振泄露主要是由于混频器输入端I/Q两路正交信号的直流分量导致的，所以通过调整I/Q信号的直流分量来可以调整本振泄露，这就是本振泄漏信号校正的技术原理。
图1是本发明实施例中本振泄漏信号校正的装置的一实施例示意图。
参阅图1，本发明实施例提供的本振泄漏信号校正的装置的一实施例包括：
微处理机控制器(Microprocessor Control Unit，MCU)、第一数模转换器(Digital to Analog Converter，DAC)、第二数模转换器、混频器(Mixer)、本振信号提供器件(Local Oscillator，LO)、信号输出线路、信号分路器件和检波管，信号分路器件设置在信号输出线路中。
信号分路器件可以是耦合器或者功分器，本发明实施例中信号分路器件用于分离出本振泄漏信号指的是通过耦合器耦合的方式取出本振泄漏信号，或者通过功分器取出本振泄漏信号。
信号输出线路包括驱动放大器(Dirver，DR)、功率放大器(Power Amplifier，PA)、第一连接线、第二连接线和第三连接线，第一连接线用于连接驱动放大器和混频器，第二连接线用于连接驱动放大器和功率放大器，第三连接线用于连接功率放大器和功率放大器后面的其他输出器件(图1中未画出)。
信号分路器件设置在第一连接线、第二连接线或者第三连接线上。如图1所示，可以设置在图1所示的1、2或者3号位置上，只要1、2和3号位置中有一处设置了信号分路器件即可实现本发明实施例中的本振校正。
如图1所示，本振泄漏信号校正的装置还可以包括本振放大器，本振放大 器的一端与检波管连接，另一端与信号分路器件连接，本振放大器用于放大信号分路器件分离出的本振泄漏信号。该本振放大器可以有，也可以没有，如果有本振放大器，会放大本振泄漏信号，可以更利于检波管检测。
微处理机控制器与第一数模转换器和第二数模转换器连接，第一数模转换器和第二数模转换器分别与混频器连接，第一数模转换器和第二数模转换器用于向混频器提供用于本振泄漏信号校正的正交直流分量VI和VQ，例如：如图1所示，第一数模转换器提供正交直流分量中的VI，第二数模转换器提供正交直流分量中的VQ，当然，也可以反过来，第一数模转换器提供正交直流分量中的VQ，第二数模转换器提供正交直流分量中的VI。VI用于调整发射链路中的正交直流分量I，VQ用于调整发射链路中的正交直流分量Q。
本振信号提供器件与混频器连接，本振信号提供器件用于向混频器提供本振信号；本振信号在混频器中经正交处理，得到0°和90°的两路本振信号，在混频器中这两路本振信号可以与发射链路中的正交直流分量I和Q进行混频。
混频器与信号输出线路连接，混频器用于向信号输出线路输出本振泄漏信号，本发明实施例中，在发射时隙，混频器输出主信号，主信号中会携带本振泄漏信号，在接收时隙，发射链路中没有主信号，则混频器只输出本振泄漏信号。
检波管的一端与信号分路器件连接，另一端与微处理机控制器连接，信号分路器件用于分离出本振泄漏信号，检波管用于检测本振泄漏信号；
微处理机控制器用于在检波管检测到的本振泄漏信号的检测值超过预先设置的本振泄漏的目标值时，控制第一数模转换器和第二数模转换器调整VI和VQ的输出值。
微处理机控制器中会预先设置本振泄漏的目标值，当本振泄漏量很小时，则不需要调整，当本振泄漏量大于目标值时，则可以通过调整VI和VQ，这样，就可以调整正交直流分量I和Q，从而降低本振泄漏。
本发明实施例中，通过信号分路器件和检波管建立了微处理机控制器与信号输出线路之间的闭环，从而可以实时调整混频器输入端正交信号I/Q的直流分量，降低了本振泄漏。
图1所示的实施例中，信号分路器件可以设置在1、2或者3号位置，下面对信号分路器件分别放在1、2或者3号位置的情况结合附图进行说明。
如图2所示，当信号分路器件设置在图1所示的1号位置时，本发明实施例提供的本振泄漏信号校正的装置的基本器件与图1所示的基本相同，只是还可以在信号分路器件和驱动放大器之间设置一个滤波器，在混频器输出本振泄漏信号后，信号分路器件可以分离主信号和本振泄漏信号，对于有未分离完全的本振泄漏信号，可以经滤波器再过滤一次，可以进一步减少主信号中的本振泄漏信号，
如图3所示，当信号分路器件设置在图1所示的2号位置时，本发明实施例提供的本振泄漏信号校正的装置的基本器件与图1所示的基本相同，图2所示的结构不需要设置滤波器，可以减少器件的数量。
图2和图3所示的结构都适用于功率放大器在接收时隙关闭的系统。
如图4所示，当信号分路器件设置在图1所示的3号位置时，本发明实施例提供的本振泄漏信号校正的装置的基本器件与图1所示的基本相同，只是这种结构比较适用于与功率放大器在接收时隙不关闭的系统。
图2至图3所示的结构，都较好的适用于时分双工(Time Division Duplexing，TDD)系统。
实际上，在图2和图3所示的结构，适用于在TDD系统的接收时隙进行，在接收时隙，PA关闭，发射信号关闭，此时检波管只会检到本振泄露信号，剥离了主信号的影响。例如：根据实际情况，可选配本振放大器，校准效率更高，校准结果更优。实际校正效果可以为：检波管下限-放大器增益+耦合器耦合度，例如，检波管下限为-30dBm，放大器增益为30dB，耦合度为10dB，则校正效果为：-30-30+10＝-50dBm，检波管结合本振放大器可提供50dB以上的检波动态。实际应用中，通过设计这三个参数来实现系统的要求。放大器增益是指本振泄漏信号所经历的放大器的总增益。
这样，可选地，当所述信号分路器件设置在第一连接线或第二连接线上时，也就是图1至图3中的1号或者2号位置，所述微处理机控制器用于在确定发射链路当前的时隙为接收时隙时，从所述检波管读取所述本振泄漏信号的检测值。 这样，就可以确保校准的效果更好。
结合图1至图4的说明，参阅图5，本发明实施例提供的本振泄漏信号校正的方法的一实施例包括：
101、微处理机控制器从所述检波管读取所述检波管检测到的本振泄漏信号的检测值，其中，所述微处理机控制器应用于通信发射系统，所述通信发射系统还包括第一数模转换器、第二数模转换器、混频器、本振信号提供器件、信号输出线路、信号分路器件和检波管，所述信号分路器件设置在所述信号输出线路中；其中，所述微处理机控制器与所述第一数模转换器和所述第二数模转换器连接，所述第一数模转换器和第二数模转换器分别与所述混频器连接，所述本振信号提供器件与所述混频器连接，所述混频器与所述信号输出线路连接，所述检波管的一端与所述信号分路器件连接，另一端与所述微处理机控制器连接。
102、所述微处理机控制器将所述检测值与预先设置的本振泄漏的目标值进行比较。
103、所述微处理机控制器在所述检测值大于所述目标值时，控制调整所述第一数模转换器和所述第二数模转换器向所述混频器输出的用于本振泄漏信号校正的正交直流分量VI和VQ。
与现有技术中滤除本振泄漏信号困难相比，本发明实施例提供的本振泄漏信号校正的方法，通过信号分路器件和检波管建立了微处理机控制器与信号输出线路之间的闭环，从而可以实时调整混频器输入端正交信号I/Q的直流分量，降低了本振泄漏。
可选地，在上述图5对应的实施例的基础上，本发明实施例提供的本振泄漏信号校正的方法的一可选实施例中，所述信号输出线路包括驱动放大器、功率放大器、第一连接线和第二连接线，所述第一连接线用于连接所述驱动放大器和所述混频器，所述第二连接线用于连接所述驱动放大器和所述功率放大器，所述信号分路器件设置在所述第一连接线或者所述第二连接线上；
所述微处理机控制器从所述检波管读取所述检波管检测到的本振泄漏信号的检测值，具体可以包括：
所述微处理机控制器从所述检波管读取所述检波管检测到的本振泄漏信号的检测值之前，确定发射链路当前的时隙是否为接收时隙；
所述微处理机控制器在当前的时隙为接收时隙时，从所述检波管读取所述检波管检测到的本振泄漏信号的检测值。
为了便于理解，下面参阅图6，对本发明实施例中本振泄漏信号校正的方法的进一步的介绍：
201、微处理机控制器开始执行时隙判断程序。
202、微处理机控制器判断发射链路当前是否处于接收时隙。若是，则执行步骤203，若否，则执行步骤204。
203、微处理机控制器确定发射链路完全关闭后，从检波管读取该检波管对本振泄漏信号的检测值。
发射链路完全关闭可以根据PA是否完全关闭进行判断。
204、微处理机控制器保持VI和VQ的值不变。
205、微处理机控制器判断读取的检测值是否大于预先设置的目标值，若是，则执行步骤206，若否，则执行步骤207。
206、微处理机控制器调整VI和VQ的输出值。
具体调整方案可以是逐步调节，也可以是计算出调节量，一次调节，最终要保证调节后的本振泄漏信号的检测值小于目标值。
207、微处理机控制器保持VI和VQ的值不变。
本发明实施例中，在接收时隙校正本振泄漏信号，信号分路器件只检测本振泄露信号，检测结果精确，校正效果优，同时不影响系统业务。
参阅图7，本发明实施例提供的微处理机控制器30应用于通信发射系统，所述通信发射系统还包括第一数模转换器、第二数模转换器、混频器、本振信号提供器件、信号输出线路、信号分路器件和检波管，所述信号分路器件设置在所述信号输出线路中；其中，所述微处理机控制器与所述第一数模转换器和所述第二数模转换器连接，所述第一数模转换器和第二数模转换器分别与所述混频器连接，所述本振信号提供器件与所述混频器连接，所述混频器与所述信号输出线路连接，所述检波管的一端与所述信号分路器件连接，另一端与所述 微处理机控制器连接，所述微处理机控制器包括：
读取单元301，用于从所述检波管读取所述检波管检测到的本振泄漏信号的检测值；
比较单元302，用于将所述读取单元301读取的检测值与预先设置的本振泄漏的目标值进行比较；
控制调整单元303，用于在所述比较单元302比较出所述检测值大于所述目标值时，控制调整所述第一数模转换器和所述第二数模转换器向所述混频器输出的用于本振泄漏信号校正的正交直流分量VI和VQ。
与现有技术中滤除本振泄漏信号困难相比，本发明实施例提供的微处理机控制器，通可以实时调整混频器输入端正交信号I/Q的直流分量，降低了本振泄漏。
可选地，在上述图7对应的实施例的基础上，本发明实施例提供的微处理机控制器的一可选实施例中，所述信号输出线路包括驱动放大器、功率放大器、第一连接线和第二连接线，所述第一连接线用于连接所述驱动放大器和所述混频器，所述第二连接线用于连接所述驱动放大器和所述功率放大器，所述信号分路器件设置在所述第一连接线或者所述第二连接线上；
所述读取单元301具体用于：
从所述检波管读取所述检波管检测到的本振泄漏信号的检测值之前，确定发射链路当前的时隙是否为接收时隙；
在当前的时隙为接收时隙时，从所述检波管读取所述检波管检测到的本振泄漏信号的检测值。
本发明实施例提供的MCU在接收时隙校正本振泄漏信号，信号分路器件只检测本振泄露信号，检测结果精确，校正效果优，同时不影响系统业务。
本发明实施例中的通信发射系统可以参阅图1至图4部分的相关描述进行理解。
本领域普通技术人员可以理解上述实施例的各种方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完成，该程序可以存储于一计算机可读存储介质中，存储介质可以包括：ROM、RAM、磁盘或光盘等。
以上对本发明实施例所提供的本振泄漏信号校正的装置、方法以及微处理机控制器进行了详细介绍，本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想；同时，对于本领域的一般技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本发明的限制。

Claims (10)

  1. 一种本振泄漏信号校正的装置，其特征在于，包括：微处理机控制器、第一数模转换器、第二数模转换器、混频器、本振信号提供器件、信号输出线路、信号分路器件和检波管，所述信号分路器件设置在所述信号输出线路中；
    其中，所述微处理机控制器与所述第一数模转换器和所述第二数模转换器连接，所述第一数模转换器和所述第二数模转换器分别与所述混频器连接，所述第一数模转换器和所述第二数模转换器用于向所述混频器提供用于本振泄漏信号校正的正交直流分量VI和VQ；
    所述本振信号提供器件与所述混频器连接，所述本振信号提供器件用于向所述混频器提供本振信号；
    所述混频器与所述信号输出线路连接，所述混频器用于向所述信号输出线路输出本振泄漏信号；
    所述检波管的一端与所述信号分路器件连接，另一端与所述微处理机控制器连接，所述信号分路器件用于分离出所述本振泄漏信号，所述检波管用于检测所述本振泄漏信号；
    所述微处理机控制器用于在所述检波管检测到的本振泄漏信号的检测值超过预先设置的本振泄漏的目标值时，控制所述第一数模转换器和所述第二数模转换器调整所述VI和所述VQ的输出值。
  2. 根据权利要求1所述的装置，其特征在于，所述装置还包括本振放大器，
    所述本振放大器的一端与所述检波管连接，另一端与所述信号分路器件连接，所述本振放大器用于放大所述信号分路器件分离出的所述本振泄漏信号。
  3. 根据权利要求1或2所述的装置，其特征在于，所述信号输出线路包括驱动放大器、功率放大器、第一连接线、第二连接线和第三连接线，所述第一连接线用于连接所述驱动放大器和所述混频器，所述第二连接线用于连接所述驱动放大器和所述功率放大器，所述第三连接线用于连接所述功率放大器和输出器件；
    所述信号分路器件设置在所述第一连接线、所述第二连接线或者所述第三连接线上。
  4. 根据权利要求3所述的装置，其特征在于，当所述信号分路器件设置在所述第一连接线上时，所述信号输出线路还包括滤波器，所述滤波器设置在所述信号分路器和所述驱动放大器之间。
  5. 根据权利要求3所述的装置，其特征在于，当所述信号分路器件设置在所述第三连接线上时，所述功率放大器在接收时隙不关闭。
  6. 根据权利要求3所述的装置，其特征在于，当所述信号分路器件设置在所述第一连接线或所述第二连接线上时，所述微处理机控制器用于在确定发射链路当前的时隙为接收时隙时，从所述检波管读取所述本振泄漏信号的检测值。
  7. 一种本振泄漏信号校正的方法，其特征在于，所述方法应用于通信发射系统，所述通信发射系统包括微处理机控制器、第一数模转换器、第二数模转换器、混频器、本振信号提供器件、信号输出线路、信号分路器件和检波管，所述信号分路器件设置在所述信号输出线路中；其中，所述微处理机控制器与所述第一数模转换器和所述第二数模转换器连接，所述第一数模转换器和第二数模转换器分别与所述混频器连接，所述本振信号提供器件与所述混频器连接，所述混频器与所述信号输出线路连接，所述检波管的一端与所述信号分路器件连接，另一端与所述微处理机控制器连接，所述方法包括：
    所述微处理机控制器从所述检波管读取所述检波管检测到的本振泄漏信号的检测值；
    所述微处理机控制器将所述检测值与预先设置的本振泄漏的目标值进行比较；
    所述微处理机控制器在所述检测值大于所述目标值时，控制调整所述第一数模转换器和所述第二数模转换器向所述混频器输出的用于本振泄漏信号校正的正交直流分量VI和VQ。
  8. 根据权利要求7所述的方法，其特征在于，所述信号输出线路包括驱动放大器、功率放大器、第一连接线和第二连接线，所述第一连接线用于连接所述驱动放大器和所述混频器，所述第二连接线用于连接所述驱动放大器和所述功率放大器，所述信号分路器件设置在所述第一连接线或者所述第二连接线 上；
    所述微处理机控制器从所述检波管读取所述检波管检测到的本振泄漏信号的检测值，具体包括：
    所述微处理机控制器从所述检波管读取所述检波管检测到的本振泄漏信号的检测值之前，确定发射链路当前的时隙是否为接收时隙；
    所述微处理机控制器在当前的时隙为接收时隙时，从所述检波管读取所述检波管检测到的本振泄漏信号的检测值。
  9. 一种微处理机控制器，其特征在于，所述微处理机控制器应用于通信发射系统，所述通信发射系统还包括第一数模转换器、第二数模转换器、混频器、本振信号提供器件、信号输出线路、信号分路器件和检波管，所述信号分路器件设置在所述信号输出线路中；其中，所述微处理机控制器与所述第一数模转换器和所述第二数模转换器连接，所述第一数模转换器和第二数模转换器分别与所述混频器连接，所述本振信号提供器件与所述混频器连接，所述混频器与所述信号输出线路连接，所述检波管的一端与所述信号分路器件连接，另一端与所述微处理机控制器连接，所述微处理机控制器包括：
    读取单元，用于从所述检波管读取所述检波管检测到的本振泄漏信号的检测值；
    比较单元，用于将所述读取单元读取的检测值与预先设置的本振泄漏的目标值进行比较；
    控制调整单元，用于在所述比较单元比较出所述检测值大于所述目标值时，控制调整所述第一数模转换器和所述第二数模转换器向所述混频器输出的用于本振泄漏信号校正的正交直流分量VI和VQ。
  10. 根据权利要求9所述的微处理机控制器，其特征在于，所述信号输出线路包括驱动放大器、功率放大器、第一连接线和第二连接线，所述第一连接线用于连接所述驱动放大器和所述混频器，所述第二连接线用于连接所述驱动放大器和所述功率放大器，所述信号分路器件设置在所述第一连接线或者所述第二连接线上；
    所述读取单元具体用于：
    从所述检波管读取所述检波管检测到的本振泄漏信号的检测值之前，确定发射链路当前的时隙是否为接收时隙；
    在当前的时隙为接收时隙时，从所述检波管读取所述检波管检测到的本振泄漏信号的检测值。
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