WO2015034187A1 - Émetteur polaire permettant de corriger une phase et une amplitude en utilisant sélectivement une multiboucle - Google Patents

Émetteur polaire permettant de corriger une phase et une amplitude en utilisant sélectivement une multiboucle Download PDF

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Publication number
WO2015034187A1
WO2015034187A1 PCT/KR2014/007521 KR2014007521W WO2015034187A1 WO 2015034187 A1 WO2015034187 A1 WO 2015034187A1 KR 2014007521 W KR2014007521 W KR 2014007521W WO 2015034187 A1 WO2015034187 A1 WO 2015034187A1
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WO
WIPO (PCT)
Prior art keywords
signal
output
comparator
output signal
phase
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Application number
PCT/KR2014/007521
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English (en)
Korean (ko)
Inventor
하성재
이건준
김민수
Original Assignee
주식회사 엘아이씨티
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Publication of WO2015034187A1 publication Critical patent/WO2015034187A1/fr

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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
    • H04B1/0475—Circuits with means for limiting noise, interference or distortion
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0483—Transmitters with multiple parallel paths

Definitions

  • the present invention relates to a polar transmitter and receiver for selecting multiple loops to adjust phase and amplitude.
  • a polar loop transmitter with general feedback is constructed as shown in FIG.
  • FIG. 1 is a structure of a 'small signal polar loop transmitter' which feeds back an output of a phase modulator
  • FIG. 2 is a structure of a 'large signal polar loop transmitter' which feeds back an output of a power amplifier.
  • the small signal polar loop transmitter of FIG. 1 has a feedback loop that feeds back the output signal of the phase modulator 320 and compares the phase signal output by the polar converter 100 to the phase adjuster 310.
  • the configuration of FIG. 1 only the adjustment of whether the phase change of the phase modulator is adjusted to the target phase to be adjusted is possible, but the change occurring in the elements of the rear stage, such as the up-converter 340 and the power amplifier 500. There is a disadvantage that cannot be adjusted.
  • the large-signal polar loop transmitter of FIG. 2 feeds back the output signal of the power amplifier 500 and compares the phase signal and amplitude signal output from the polar converter 100 to the amplitude adjuster 210 and the phase adjuster 310.
  • the non-linearity generated in the power amplifier can be measured and adjusted by feeding back and controlling the output of the power amplifier, but the loop bandwidth is increased.
  • the present invention provides a polar transmitter having a function of controlling the phase change occurring in the elements behind the phase modulator and suppressing an increase in the loop bandwidth.
  • the polar receiver according to the present invention relates to a polar transmitter which modulates an I / Q signal into an amplitude and a phase signal and outputs the signal.
  • An upconverter, three couplers, and three comparators for use for high frequency are provided. It has a configuration to correct.
  • a polar transmitter includes: a polar converter for converting an I / Q signal into an amplitude and a phase signal and outputting the amplitude; an amplitude regulator for adjusting the amplitude output of the polar converter; a phase regulator for adjusting the phase output of the polar converter; A phase modulator driver for transferring phase information of the phase adjuster to the phase modulator, a phase modulator for receiving the phase information from the phase modulator driver, outputting a phase modulated signal, a first coupler for coupling the phase modulator output, and a phase modulator output An upconverter for converting the frequency to a target frequency in the high frequency band, a second coupler for coupling the output of the upconverter, a power amplifier for amplifying the upconverter output frequency signal, a third coupler for coupling the output of the power amplifier A first switch for selecting and inputting a signal coupled from the second coupler and the third coupler; A frequency selected to make the first switch output equal to the
  • a second downconverter that downconverts the frequency to fit the ADC input, a lowpass filter, a second amplifier that adjusts the amplitude to fit the ADC input, an ADC that changes the analog signal digitally, three comparators to compare the feedback signal, A controller that controls the switch and informs the comparator of this control signal, a DAC that converts the digital output of the amplitude adjuster into an analog signal, a first amplifier that amplifies the analog signal of the DAC output, and the analog signal to the DC of the power amplifier. And an amplitude modulator for amplitude modulation.
  • a polar transmitter includes a feedback loop in which a phase modulator, an up-converter, and a power amplifier are included in a feedback path.
  • the first output signal of the phase modulator, the second output signal of the up-converter, and the third output signal of the power amplifier are compared with the output signal of the polar converter to correct the output signal of the polar converter. It includes a comparator that serves as a signal.
  • the output signal of the polar converter may be compared with only one of the first output signal, the second output signal, and the third output signal.
  • the first switch for selecting one of the second output signal and the third output signal;
  • a second switch for selecting one of an output of the first switch and the first output signal;
  • a controller for controlling the operation of the first switch and the second switch.
  • the comparator may include: a first comparator for comparing the first output signal and an output signal of the polar converter, a second comparator for comparing the second output signal and an output signal of the polar converter, and the third output signal; It may include a third comparator for comparing the output signal of the polar converter.
  • the first switch for selecting one of the second output signal and the third output signal;
  • a second switch for selecting one of an output of the first switch and the first output signal;
  • a controller configured to synchronize operations of the first comparator, the second comparator, the third comparator, the first switch, the first switch, and the second switch.
  • the output signal of the first comparator may be provided to the second comparator, and the output signal of the second comparator may be provided to the third comparator.
  • the first output signal, the second output signal, and the third output signal pass through the pass path further includes a low pass filter provided, the first output signal, the second output signal, and the All of the third output signal may be input to the comparator through the low pass filter.
  • the first output signal, the second output signal, and the third output signal may all be provided to the comparator after being converted to a low frequency.
  • An amplitude adjuster configured to adjust the amplitude signal by comparing an amplitude signal of the output signal of the polar converter with the correction signal; And a phase adjuster configured to adjust the phase signal by comparing the phase signal among the output signals of the polar converter with the correction signal.
  • the signal output from the phase adjuster is sequentially passed through the phase modulator and the upconverter and provided to the power amplifier, and the signal output from the amplitude adjuster passes through the amplitude modulator to be provided to the power amplifier.
  • the phase modulator driver may further include a phase modulator driver for converting a signal output from the phase adjuster into a signal for inputting the phase modulator.
  • the phase modulator may be a direct digital synthesizer (DDS) including a register therein, and the phase modulator driver may be configured to change the register.
  • DDS direct digital synthesizer
  • an amplitude adjuster and a phase adjuster for respectively adjusting an amplitude signal and a phase signal output from a polar converter;
  • a first coupler coupling the output of the phase modulator, a second coupler coupling the output of an upconverter, and a third coupler coupling a power amplifier output;
  • a first switch for selecting a signal of the second coupler and a signal of the third coupler;
  • a first downconverter for downconverting the frequency of the signal selected by the first switch to the same frequency as the output frequency of the phase modulator;
  • a second switch for selecting a signal of the first coupler and an output of the first downconverter;
  • a second downconverter for downconverting the frequency of the signal selected by the second switch;
  • An ADC for digitizing the output of the second downconverter;
  • a comparator for comparing the output of the ADC with a phase signal and an amplitude signal of the polar converter.
  • the comparator includes: a first comparator for comparing the phase signal with a signal from the first coupler; A second comparator for comparing the phase signal with a signal from the second coupler; And a third comparator for comparing the phase signal and the amplitude signal with a signal from the third coupler.
  • the third comparator may output a phase correction signal and an amplitude correction signal, the amplitude correction signal may be input to the amplitude adjuster, and the phase correction signal may be input to the phase adjuster.
  • the result of the first comparator may be input to the second comparator, and the result of the second comparator may be input to the third comparator.
  • the phase modulator driver may further include a signal for generating a signal for controlling the phase modulator using the output signal of the phase adjuster.
  • the output frequency of the first down converter may be the same as the output frequency of the phase modulator.
  • a polar transmitter having a function of controlling the phase change occurring in the elements behind the phase modulator and suppressing an increase in the loop bandwidth.
  • FIG. 1 shows the structure of a 'small signal polar loop transmitter' which feeds back the output of a phase modulator.
  • FIG. 2 shows the structure of a 'large signal polar loop transmitter' which feeds back the output of a power amplifier.
  • FIG 3 shows a structure of a polar transmitter according to an embodiment of the present invention.
  • FIG. 3 shows a structure of a polar transmitter according to an embodiment of the present invention. A description with reference to FIG. 3 is as follows.
  • the polar converter 100 receives an I / Q signal and converts the amplitude signal and the phase signal into separate signals.
  • the amplitude signal is sequentially passed through the amplitude adjuster 210 and the DAC 220 is output as an analog signal, the output is amplified by the first amplifier 230.
  • the amplitude modulator 240 receives the output of the first amplifier 230 and outputs an amplitude modulated signal.
  • the amplitude modulated signal is connected to a DC power supply of the power amplifier 500.
  • the phase signal is input to the phase adjuster 310.
  • the phase adjuster 310 receives a correction signal output from the comparator 333 and corrects the output phase signal by using the correction signal.
  • the phase modulator driver 311 converts the corrected phase signal to be input to the phase modulator 320.
  • the phase modulator 320 adjusts the phase of the output signal of the phase modulator driver 311 and outputs an output signal having a frequency corresponding to the adjusted phase.
  • the up-converter 340 up-converts the output signal of the phase modulator 320 to a signal having a target frequency to be finally transmitted.
  • the power amplifier 500 combines the up-converted signal to the target frequency with the amplitude modulated signal and outputs a final output high frequency signal.
  • the output signal of the up-converter 340 is input to the first switch 521 through the second coupler 341.
  • the output signal of the power amplifier 500 is input to the first switch 521 through the third coupler 510.
  • the output signal of the up-converter 340 and the output signal of the power amplifier 500 have the same frequency, and the first switch 521 selects one of the two output signals.
  • the first down converter 522 down-converts the signal selected by the first switch 521 to the same frequency as that of the output signal of the phase modulator 320.
  • the output signal of the phase modulator 320 is input to the second switch 523 through the first coupler 330.
  • the output signal of the first down-converter 522 is input to the second switch 523.
  • the second switch 523 selects and outputs these two input signals.
  • the selection operation of the first switch 521 and the second switch 523 is performed by the controller 600.
  • the second downconverter 524 downconverts the signal selected by the second switch 523 to a frequency band processable by the ADC 527.
  • the low pass filter 525 passes only the low band signal of the signal output by the second downconverter 524.
  • the second amplifier 526 amplifies the signal passing through the low pass filter 525 in accordance with the signal input range of the ADC 527 and provides it to the ADC 527.
  • the ADC 527 converts the input analog signal into a digital signal and provides it to the comparator 530.
  • the comparator 530 compares the digital signal output from the ADC 527 with the amplitude signal and the phase signal output from the polar converter 100.
  • the comparator 530 includes three comparators of the first comparator 531, the second comparator 532, and the third comparator 533.
  • the first comparator 531 compares the output signal of the phase modulator 320 with the phase signal output from the polar converter 100.
  • the second comparator 532 compares the output signal of the up-converter 340 with the phase signal output from the polar converter 100.
  • the third comparator 533 compares the output signal of the power amplifier 500 with the phase signal and amplitude signal output from the polar converter 100.
  • the operations of the first comparator 531, the second comparator 532, the third comparator 533, the first switch 521, and the second switch 523 are synchronized and controlled by the controller 600.
  • the digital signals output by the ADC 527 are input to the first comparator 531, the second comparator 532, and the third comparator 533, respectively.
  • the output of the first comparator 531 is input to the second comparator 532, and the output of the second comparator 532 is input to the third comparator 533. Finally, the output result of the third comparator 533 is provided as a correction signal to the phase adjuster 310 and the amplitude adjuster 210.
  • the controller 600 allocates selection times of the first switch 521 and the second switch 523 so that the loop bandwidth is minimized. That is, the output signal of the phase modulator 320 coupled by the first coupler 330 is input to the comparator 530 for the longest time, and then the up-converter coupled by the second coupler 341. The output signal of the 340 is input to the comparator 530 for the next longest time, and finally the output signal of the power amplifier 500 coupled by the third coupler 510 becomes the comparator for the shortest time.
  • the first switch 521 and the second switch 523 are controlled to be input to the 530.
  • the phase adjuster 310 which receives the correction signal provided by the comparator 530 corrects the phase signal provided by the polar converter 100 based on the correction signal.
  • the signal output from the phase adjuster 310 is converted into an input signal of the phase modulator 310 by the phase modulator driver 311.
  • phase modulator 320 is a direct digital synthesizer (DDS)
  • DDS direct digital synthesizer
  • the phase modulator driver 330 functions as a control interface for changing a register inside the DDS.
  • the comparator 333, the ADC 332, and the down-converter 331 of FIG. 1 have functions corresponding to the comparator 530, the ADC 527, and the second down-converter 524 of FIG. 3, respectively.
  • the comparator 513, the ADC 512, and the downconverter 511 of FIG. 2 are respectively a comparator 530, an ADC 527, and a second downconverter 524 / first downconverter 522 of FIG. 3.
  • phase modulator 330 first coupler
  • up-modulator 341 second coupler
  • first comparator 532 second comparator

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

Abstract

La présente invention concerne un émetteur polaire qui comprend un modulateur de phase, un convertisseur-élévateur de fréquence, et une boucle de rétroaction ayant un amplificateur de puissance inclus dans un chemin de rétroaction. L'émetteur polaire comprend un comparateur qui compare un premier signal de sortie du modulateur de phase, un deuxième signal de sortie du convertisseur-élévateur de fréquence et un troisième signal de sortie de l'amplificateur de puissance avec un signal de sortie d'un convertisseur polaire, et fournit les signaux de sortie comme des signaux de correction permettant de corriger le signal de sortie du convertisseur polaire.
PCT/KR2014/007521 2013-09-04 2014-08-13 Émetteur polaire permettant de corriger une phase et une amplitude en utilisant sélectivement une multiboucle WO2015034187A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2013-0106238 2013-09-04
KR1020130106238A KR101523087B1 (ko) 2013-09-04 2013-09-04 다중 루프를 선택 이용하여 위상과 진폭을 보정하는 폴러송신기

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WO2015034187A1 true WO2015034187A1 (fr) 2015-03-12

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000016651A (ko) * 1996-06-28 2000-03-25 클라스 노린, 쿨트 헬스트룀 위상왜곡 보상장치 및 방법
US6633751B1 (en) * 2000-09-21 2003-10-14 Skyworks Solutions, Inc. System for a dual feedback translation loop for power amplifier feedback control
US20080225984A1 (en) * 2007-03-13 2008-09-18 Walid Khairy Mohamed Ahmed Digital Polar Transmitter
US7787570B2 (en) * 2005-07-13 2010-08-31 Skyworks Solutions, Inc. Polar loop radio frequency (RF) transmitter having increased dynamic range amplitude control

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000016651A (ko) * 1996-06-28 2000-03-25 클라스 노린, 쿨트 헬스트룀 위상왜곡 보상장치 및 방법
US6633751B1 (en) * 2000-09-21 2003-10-14 Skyworks Solutions, Inc. System for a dual feedback translation loop for power amplifier feedback control
US7787570B2 (en) * 2005-07-13 2010-08-31 Skyworks Solutions, Inc. Polar loop radio frequency (RF) transmitter having increased dynamic range amplitude control
US20080225984A1 (en) * 2007-03-13 2008-09-18 Walid Khairy Mohamed Ahmed Digital Polar Transmitter

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KR20150027602A (ko) 2015-03-12

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