WO2017146278A1 - Dispositif de transmission permettant d'effectuer une formation de faisceau sélective à l'aide d'un circuit de transmission à flux multiples et son procédé de transmission - Google Patents

Dispositif de transmission permettant d'effectuer une formation de faisceau sélective à l'aide d'un circuit de transmission à flux multiples et son procédé de transmission Download PDF

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Publication number
WO2017146278A1
WO2017146278A1 PCT/KR2016/001798 KR2016001798W WO2017146278A1 WO 2017146278 A1 WO2017146278 A1 WO 2017146278A1 KR 2016001798 W KR2016001798 W KR 2016001798W WO 2017146278 A1 WO2017146278 A1 WO 2017146278A1
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WO
WIPO (PCT)
Prior art keywords
signal
impedance
beamforming
circuit
stream
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Application number
PCT/KR2016/001798
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English (en)
Korean (ko)
Inventor
최일도
이경태
이주용
Original Assignee
한국과학기술원
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Priority to PCT/KR2016/001798 priority Critical patent/WO2017146278A1/fr
Publication of WO2017146278A1 publication Critical patent/WO2017146278A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station

Definitions

  • the present invention relates to a radio transmitting apparatus and a method thereof. More specifically, the present invention relates to a wireless transmission apparatus and method for performing selective beamforming using a multi-stream transmission circuit.
  • a communication system based on a voice communication service has used a single input single output (SISO) system using only a single antenna element for narrowband channel characteristics within a limited frequency range, but a narrowband SISO system using a single antenna is used.
  • SISO single input single output
  • MIMO Multiple Input Multiple Output
  • MIMO Multiple Input Multiple Output
  • MIMO technology which uses a common array antenna to improve the data rate, increases the RF rate along with the increase in RF complexity when extending the antenna to improve the data rate.
  • one active antenna and a plurality of parasitic antennas are basically coupled to each other to form a beam pattern.
  • the power is applied to an active antenna using only a power amplifier for feeding one active antenna, and transfers power through a mutual coupling to a parasitic antenna disposed around the active antenna, and to an impedance value loaded in the parasitic antenna. Therefore, the signal is radiated.
  • an impedance value for flowing a desired current must be loaded into an antenna, and in particular, an impedance value loaded into an active antenna needs to be always maintained at 50 ⁇ .
  • the beamspace MIMO system uses a single RF and has several advantages.
  • the performance is determined according to the sensitivity of the coupling between the antennas. There is this.
  • Coupling between antennas can be defined as a parameter called Z-matrix, and this value can be easily changed according to the environment around the antenna, which has the disadvantage that the stability of the antenna stage is not guaranteed.
  • a load-modulated beamspace-MIMO in which an RF stage is connected to not only an active antenna but also a parasitic antenna, and the impedance loading circuits all share one power amplifier.
  • the system is emerging.
  • the coupling between the antennas can be reduced as much as possible and the isolation can be increased as compared to the beamspace (MIMO) method in which the antenna must maintain a coupling state that is neither too large nor too small. .
  • a load-modulated beamspace (MIMO) system requires an additional matching network between the power amplifier and the impedance loading circuit. This is because the impedance loading circuit changes impedance, but the impedance seen from the parasitic antenna must be maintained at 50 ohms.
  • the load-modulated beamspace (MIMO) system secures antenna stability, but increases the complexity of the system implementation due to an additional matching network and increases the difficulty and price of the implementation. have.
  • the present invention is to solve the above problems, and through the impedance loading control for the active antenna and the parasitic antenna, beam space multi-stream transmission using the active antenna and beamforming function using a plurality of parasitic antennas selectively It is an object of the present invention to provide a radio transmitting apparatus and a method thereof that can be performed.
  • a wireless transmission apparatus including at least one parasitic antenna and at least one active antenna for a beam space MIMO system for achieving the above object, a modem circuit for outputting a signal to be transmitted by multi-stream transmission or beamforming (beamforming)
  • a control circuit for selectively applying a control signal for generating a multi-stream signal or a beamforming signal according to the transmission mode of the modem circuit, and the beamforming signal according to the applied control signal.
  • an impedance loading circuit for loading impedances corresponding to the plurality of parasitic antennas for transmission or for loading the impedances corresponding to one or more active antennas for transmitting the multi-stream signal.
  • the modem circuit may determine the transmission mode as a multi-stream transmission or beamforming transmission mode according to the update of the channel information.
  • the control circuit may include a multi-stream impedance converter for generating an impedance code corresponding to the multi-stream signal received from the modem circuit and outputting the impedance code to the impedance loading circuit.
  • the control circuit may generate a control signal for loading impedances corresponding to the parasitic antennas from a signal to be transmitted by beamforming received by the modem circuit, and output the control signal to the impedance loading circuit. It may include a forming impedance controller.
  • the impedance loading circuit may control one or more switches to load impedances corresponding to each of the plurality of parasitic antennas according to an impedance loading value for outputting a beamforming signal applied from the control circuit.
  • One or more beamforming impedance loading circuits may be included.
  • the one or more switches may include a second switch to determine the.
  • the impedance loading circuit controls the one or more variable resistors according to an impedance code for outputting the multi-stream signal applied from the control circuit, respectively, and loads a load modulated impedance corresponding to the active antenna, respectively.
  • One or more load modulated impedance loading circuits may be included.
  • a wireless transmission method using a wireless transmission apparatus including one or more parasitic antennas and one or more active antennas for a beam space MIMO system includes a signal to be transmitted by multi-stream transmission or beamforming. Outputting, selectively applying a control signal for generating a multi-stream signal or a beamforming signal according to the output signal, and transmitting a plurality of parasitics for transmitting the beamforming signal according to the applied control signal Loading an impedance corresponding to an antenna, or loading an impedance corresponding to one or more active antennas for transmitting the multi-stream signal.
  • the multi-stream transmission signal or the beamforming transmission signal may be output according to the update of the channel information.
  • the applying may further include generating an impedance code corresponding to the multi-stream signal and applying a control signal including the generated impedance code.
  • the applying may include applying a control signal for loading impedances corresponding to the plurality of parasitic antennas from the beamforming signal.
  • the impedance corresponding to each of the parasitic antennas may be loaded by controlling one or more switches according to the impedance loading value for the beamforming signal output.
  • the one or more switches may include a second switch to determine the.
  • the load modulated impedance corresponding to the active antenna may be loaded by controlling one or more variable resistors according to the impedance code for outputting the multi-stream signal.
  • the multi-stream signal is transmitted through a single RF, it is advantageous to integrate, reduce the cost, and ensure the stability of the antenna stage.
  • FIG. 1 is a block diagram showing a configuration of a transmitting apparatus according to an embodiment of the present invention.
  • FIG. 2 is a block diagram showing the detailed configuration of the transmitter shown in FIG.
  • FIG. 3 is a block diagram illustrating a detailed configuration of a multi-stream impedance converter according to an exemplary embodiment of the present invention.
  • FIG. 4 is a diagram illustrating a detailed configuration of a load modulating impedance loading unit according to an exemplary embodiment of the present invention.
  • FIG. 5 is a circuit diagram illustrating a detailed configuration of a beamforming impedance loading unit according to an embodiment of the present invention.
  • FIG. 6 is a flowchart illustrating a transmission method of a transmission apparatus according to an embodiment of the present invention.
  • components expressed as means for performing the functions described in the detailed description include all types of software including, for example, a combination of circuit elements or firmware / microcode, etc. that perform the functions. It is intended to include all methods of performing a function which are combined with appropriate circuitry for executing the software to perform the function.
  • the invention, as defined by these claims, is equivalent to what is understood from this specification, as any means capable of providing such functionality, as the functionality provided by the various enumerated means are combined, and in any manner required by the claims. It should be understood that.
  • FIG. 1 is a block diagram illustrating a transmitter according to an embodiment of the present invention.
  • a transmission device 100 may include a modem circuit 110, a control circuit 120, an impedance loading circuit 130, an antenna unit 140, and a power distribution circuit 150. ).
  • the modem circuit 110 may output a signal to be transmitted by multi-stream transmission or beamforming.
  • the signal transmitted by multi-stream transmission or beamforming may be a complex signal.
  • the modem circuit 110 may be implemented as an LTE modem or an LTE-A modem, but is not limited thereto.
  • the modem circuit 110 may determine the transmission mode of the output signal in the multi-stream transmission mode or the beamforming transmission mode according to the update of the channel information.
  • the control circuit 120 selectively applies a control signal for generating the multi-stream signal or the beamforming signal to the impedance loading circuit 130 according to the transmission mode of the modem circuit 110.
  • a control signal for generating a multi-stream signal may be applied, and in the beam-forming transmission mode, a control signal for generating a beamforming signal may be applied.
  • control circuit 120 may change the I / Q signal transmitted from the modem circuit 110 to an impedance loading value.
  • the impedance loading value may be the magnitude of the impedance required to deliver a specific magnitude of current to the antenna unit 140.
  • a method of converting an I / Q signal into an impedance loading value will be described later with reference to FIG. 3.
  • the impedance loading circuit 130 may load an impedance corresponding to an active antenna or an impedance corresponding to a parasitic antenna according to a control signal applied from the control circuit 120.
  • the impedance loading circuit 130 may load an impedance corresponding to at least one active antenna to transmit the multi-stream signal. Also, when the transmission mode of the modem circuit is the beamforming transmission mode, the impedance loading circuit 130 may load impedances corresponding to the plurality of parasitic antennas in order to transmit the beamforming signal.
  • the impedance loading circuit 130 may control at least one switch to set an impedance loading value for outputting the beamforming signal. A detailed operation of the impedance loading circuit 130 will be described later with reference to FIG. 5.
  • the antenna unit 140 transmits a signal to the outside.
  • the antenna unit 140 may include at least one active antenna and a plurality of parasitic antennas, and electromagnetic fields radiated through the active antennas may be induced through mutual coupling to the plurality of parasitic antennas.
  • the antenna unit 140 may be implemented as a printed circuit board (PCB) such as a motherboard, an integrated circuit (IC), a system on chip (SoC), or the like.
  • PCB printed circuit board
  • IC integrated circuit
  • SoC system on chip
  • the power distribution circuit 150 supplies power to the impedance loading circuit 130.
  • the power distribution circuit 150 may supply different power to each impedance loading unit of the impedance loading circuit 130 based on the control signal applied from the control circuit 120.
  • the power supplied to each impedance loading unit of the impedance loading circuit 130 may be the same value.
  • FIG. 2 is a block diagram showing the detailed configuration of the transmitter shown in FIG.
  • the transmitter 100 ′ includes a baseband modem 110, a multi-stream impedance converter 121, a beamforming impedance controller 122, a beamforming impedance loading unit 131, and a load modulation impedance loading unit. 132, an antenna 141, and a power distribution unit 150. Detailed description of parts overlapping with those shown in FIG. 1 among the elements shown in FIG. 2 will be omitted.
  • the multi-stream impedance converter 121 When the transmission mode of the modem circuit 110 is determined as the multi-stream transmission mode, the multi-stream impedance converter 121 generates an impedance code corresponding to the multi-stream signal received by the modem circuit 110 to generate an impedance loading circuit 130. Can be printed as
  • the impedance loading circuit 130 loads the first to nth load modulation impedance loading units 132-1, 132-2,..., 132-n so that the antennas 141-1, 141-2, 141-n) may transmit a multi-stream signal.
  • the beamforming impedance control unit 122 receives a control signal for loading an impedance corresponding to the parasitic antenna from the beamforming signal received by the modem circuit 110. It may be generated and output to the impedance loading circuit 130.
  • the impedance loading circuit 130 loads the first to nth beamforming impedance loading units 131-1, 131-2,..., 131-n to the antennas 141-1, 141-2, 141-n) may transmit a beamforming signal.
  • FIG. 3 is a block diagram illustrating a detailed configuration of a multi-stream impedance converter according to an exemplary embodiment of the present invention.
  • the multi-stream impedance converter 121 may include a code generator 310, an interface 320, and a look-up table 330.
  • the multi-stream impedance converter 121 may generate an impedance code corresponding to the multi-stream signal.
  • the code generator 310 generates an impedance code corresponding to the I / Q signal received from the modem circuit 110.
  • the code generator 310 may separate the I and Q values from the received I / Q signal and generate an impedance code based on the I and Q values in the pre-stored lookup table 130. Thereafter, the interface unit 320 may transmit the generated impedance code to the load modulation impedance loading unit 132.
  • FIG. 4 is a diagram illustrating a detailed configuration of a load modulating impedance loading unit according to an exemplary embodiment of the present invention.
  • the load modulation impedance loading unit 132 includes a 90 degree hybrid coupler 411, 412, 413, and a Wilkinson power combiner 420.
  • the load modulating impedance loading unit 132 may change the amplitude and phase of the current flowing through the active antenna by adjusting the loaded impedance value of the active antenna. As a result, the load modulation impedance loading unit 132 may adjust the impedance value of the active antenna so that a signal corresponding to the multi-stream signal output from the modem circuit 110 is transmitted from the active antenna.
  • FIG. 5 is a circuit diagram illustrating a detailed configuration of a beamforming impedance loading unit according to an embodiment of the present invention.
  • the beamforming impedance loading unit 131 includes a first switch 510, a second switch 520, and a plurality of switch arrays 531 and 532.
  • the first switch 510 may adjust the sound volume of the reactance region of the output signal output to the parasitic antenna. Specifically, when the first switch 510 is turned on upward, the reactance of the output signal may have a positive value, and when the first switch 510 is turned on downward, the reactance of the output signal is negative Can have
  • the second switch 520 may determine whether the output signal is inductor interlocked. In detail, the inductor is interlocked when the second switch 520 is turned on, and the inductor is not interlocked when the second switch 520 is turned off.
  • the plurality of switch arrays 531 and 532 may control the capacitor array according to the impedance loading value.
  • the circuit shown in FIG. 5 is only an embodiment of the beamforming impedance loading unit according to the present invention, and the beamforming impedance loading unit may be implemented by various other circuits, but is not limited thereto.
  • FIG. 6 is a flowchart illustrating a transmission method of a transmission apparatus according to an embodiment of the present invention.
  • a signal to be transmitted by multi-stream transmission or beamforming is output (S610).
  • the output signal may be determined as a multi-stream transmission signal or a beamforming transmission signal according to the update of the channel information.
  • a control signal for generating a multi-stream signal or a beamforming signal is selectively applied (S620).
  • an impedance code corresponding to the multi-stream signal may be generated to apply a control signal corresponding to the multi-stream signal, or a control signal for loading impedances corresponding to the plurality of parasitic antennas from the beamforming signal may be applied.
  • an impedance corresponding to a plurality of parasitic antennas is loaded to transmit a beamforming signal, or an impedance corresponding to at least one active antenna is loaded to transmit a multi-stream signal (S630).
  • the multi-stream signal is transmitted through a single RF, it is advantageous to integrate, reduce the cost, and ensure the stability of the antenna stage.
  • the above-described method according to various embodiments of the present disclosure may be implemented in program code and provided to each server or devices in a state of being stored in various non-transitory computer readable mediums.
  • the non-transitory readable medium refers to a medium that stores data semi-permanently and is readable by a device, not a medium storing data for a short time such as a register, a cache, a memory, and the like.
  • a non-transitory readable medium such as a CD, a DVD, a hard disk, a Blu-ray disk, a USB, a memory card, a ROM, or the like.

Abstract

La présente invention concerne un dispositif de transmission sans fil comprenant une ou plusieurs antennes parasites et une ou plusieurs antennes actives destinées à un système MIMO d'espace de faisceau. Le dispositif de transmission sans fil comprend : un circuit de modem permettant de délivrer un signal devant être transmis par le biais d'une transmission ou d'une formation de faisceau à flux multiples; un circuit de commande permettant d'appliquer sélectivement un signal de commande afin de générer un signal à flux multiples ou un signal de formation de faisceau, selon un mode de transmission du circuit de modem; et un circuit de charge d'impédance permettant de charger l'impédance correspondant à une pluralité d'antennes parasites afin de transmettre le signal de formation de faisceau ou une charge d'impédance correspondant à une ou plusieurs antennes actives afin de transmettre le signal à flux multiples, selon le signal de commande appliqué.
PCT/KR2016/001798 2016-02-24 2016-02-24 Dispositif de transmission permettant d'effectuer une formation de faisceau sélective à l'aide d'un circuit de transmission à flux multiples et son procédé de transmission WO2017146278A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2016/001798 WO2017146278A1 (fr) 2016-02-24 2016-02-24 Dispositif de transmission permettant d'effectuer une formation de faisceau sélective à l'aide d'un circuit de transmission à flux multiples et son procédé de transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2016/001798 WO2017146278A1 (fr) 2016-02-24 2016-02-24 Dispositif de transmission permettant d'effectuer une formation de faisceau sélective à l'aide d'un circuit de transmission à flux multiples et son procédé de transmission

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WO2017146278A1 true WO2017146278A1 (fr) 2017-08-31

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PCT/KR2016/001798 WO2017146278A1 (fr) 2016-02-24 2016-02-24 Dispositif de transmission permettant d'effectuer une formation de faisceau sélective à l'aide d'un circuit de transmission à flux multiples et son procédé de transmission

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050064824A1 (en) * 2001-12-06 2005-03-24 Jozef Reinerus Maria Bergervoet Parasitic elements diversity antenna
US20060022889A1 (en) * 2004-07-29 2006-02-02 Interdigital Technology Corporation Multi-mode input impedance matching for smart antennas and associated methods
WO2010088721A1 (fr) * 2009-02-04 2010-08-12 Commonwealth Scientific And Industrial Research Organisation Procédé et appareil pour commutation d'antenne et de mode de transmission
KR20150087892A (ko) * 2014-01-22 2015-07-31 한국과학기술원 빔공간 mimo 기반의 통신 장치, 및 이의 동작 방법

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050064824A1 (en) * 2001-12-06 2005-03-24 Jozef Reinerus Maria Bergervoet Parasitic elements diversity antenna
US20060022889A1 (en) * 2004-07-29 2006-02-02 Interdigital Technology Corporation Multi-mode input impedance matching for smart antennas and associated methods
WO2010088721A1 (fr) * 2009-02-04 2010-08-12 Commonwealth Scientific And Industrial Research Organisation Procédé et appareil pour commutation d'antenne et de mode de transmission
KR20150087892A (ko) * 2014-01-22 2015-07-31 한국과학기술원 빔공간 mimo 기반의 통신 장치, 및 이의 동작 방법

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CHOI, JIN KYU ET AL.: "OFDM Transmission Method Based on the Beam-Space MIMO System", THE JOURNAL OF KOREAN INSTITUTE OF COMMUNICATIONS AND INFORMATION SCIENCES, vol. 40, no. 3, March 2015 (2015-03-01), pages 425 - 431, XP055411766 *

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