WO2020145421A1 - Dispositif électronique d'émission de signal de référence - Google Patents

Dispositif électronique d'émission de signal de référence Download PDF

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Publication number
WO2020145421A1
WO2020145421A1 PCT/KR2019/000260 KR2019000260W WO2020145421A1 WO 2020145421 A1 WO2020145421 A1 WO 2020145421A1 KR 2019000260 W KR2019000260 W KR 2019000260W WO 2020145421 A1 WO2020145421 A1 WO 2020145421A1
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WO
WIPO (PCT)
Prior art keywords
antenna
reception
srs
electronic device
transmission
Prior art date
Application number
PCT/KR2019/000260
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English (en)
Korean (ko)
Inventor
조은빛
강영희
임경호
Original Assignee
엘지전자 주식회사
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Publication date
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to PCT/KR2019/000260 priority Critical patent/WO2020145421A1/fr
Publication of WO2020145421A1 publication Critical patent/WO2020145421A1/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
    • H04B1/38—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
    • H04B1/401—Circuits for selecting or indicating operating mode
    • 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
    • H04B1/44—Transmit/receive switching
    • H04B1/46—Transmit/receive switching by voice-frequency signals; by pilot signals
    • 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
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile

Definitions

  • the present invention relates to an electronic device that transmits a reference signal. More specifically, it relates to an electronic device that transmits a reference signal through different antenna ports.
  • Electronic devices may be divided into mobile/portable terminals and stationary terminals depending on whether they are movable. Again, electronic devices may be divided into handheld terminals and vehicle mounted terminals according to whether the user can directly carry them.
  • the functions of electronic devices are diversifying. For example, there are functions for data and voice communication, photo and video shooting through a camera, voice recording, music file playback through a speaker system, and output of an image or video to the display.
  • an electronic game play function is added or a multimedia player function is performed.
  • recent mobile terminals can receive multicast signals that provide visual content such as broadcast and video or television programs.
  • Such electronic devices have diversified functions, for example, they are implemented in the form of a multimedia player equipped with complex functions such as taking pictures or videos, playing music or video files, and receiving games and broadcasts. have.
  • the mobile terminal may be configured to provide 5G communication service in various frequency bands. Recently, attempts have been made to provide a 5G communication service using a Sub6 band below the 6GHz band. However, in the future, it is expected to provide 5G communication service using millimeter wave (mmWave) band in addition to Sub6 band for faster data rate.
  • mmWave millimeter wave
  • 5G NR New Radio
  • SRS sounding reference signal
  • the UE when the UE transmits such SRS information, the UE needs to transmit sequentially through different antenna ports. Therefore, in order to sequentially transmit SRS information through different antenna ports, hardware for transmitting signals for each antenna should be provided.
  • the structure of the transmission/reception unit currently being discussed in 5G NR is an asymmetric transmission/reception structure such as 1T4R, 2T4R, and the like.
  • the transmitting system is implemented with one or two transmitting systems in a simpler form than the front-end of the receiving system.
  • the present invention aims to solve the above and other problems.
  • another object is to provide an electronic device capable of transmitting a reference signal through all antenna ports.
  • Another object of the present invention is to provide a configuration and control method of an electronic device capable of transmitting a reference signal through all antenna ports even in a single transmission system having one power amplifier.
  • an electronic device includes a plurality of antennas operating in the same band, including a first antenna used for transmission and reception and a second antenna used for reception; A plurality of reception amplification units (LNA) formed between each antenna and the RFIC; A power amplifier (PA) disposed between the RFIC and the plurality of antennas; A switch provided inside the RFIC and forming a path between the second antenna and the one PA; And a coupler that bypasses the plurality of LNAs through the switch from the one PA and couples them to any one of the plurality of antennas.
  • LNA reception amplification units
  • PA power amplifier
  • the electronic device includes a baseband processor that sequentially connects the plurality of antennas to the single PA so that each antenna can transmit SRS (Sounding Reference Signal) information based on SRS transmission timing,
  • SRS Sounding Reference Signal
  • a reference signal may be transmitted through all antenna ports using a feedback reception path.
  • the plurality of antennas may further include a third antenna and a fourth antenna used for the reception. Accordingly, a feedback transmission signal fed back through the coupler may be transmitted as an SRS signal through the second antenna or the fourth antenna. Accordingly, there is an advantage in that a reference signal can be transmitted through all antenna ports even in a single transmission system using elements such as a switch and a coupler corresponding to a multiplexer.
  • the baseband processor is configured such that different SRS information included in a signal coupled from the coupler is sequentially transmitted through the second antenna to the fourth antenna based on different SRS transmission timings.
  • the switch can be controlled via RFIC.
  • the baseband processor controls the switch to be connected to a transmission path in advance so that a signal from the one PA can be transmitted to a feedback path of the RFIC in a data transmission period other than the SRS transmission timing. Can.
  • the baseband processor, the signal from the one PA at the SRS transmission timing, the bypass of any one of the plurality of LNA connected to the second antenna to the fourth antenna through the switch ( bypass) can be controlled to transmit the SRS information.
  • the baseband processor controls a second switch connected between the first antenna and the one PA so that signals are transmitted and received in a time division duplex (TDD) having a transmission section and a reception section. can do.
  • TDD time division duplex
  • the switch may be connected to a corresponding antenna port to control the transmission of the SRS information, and the plurality of LNAs connected to the second antenna may be controlled to be connected to a bypass path.
  • the RFIC may be controlled to dynamically adjust the coupling ratio by adjusting the value of the variable resistor R2.
  • the baseband processor has the advantage that it can be controlled to transmit data and a reference signal simultaneously through the first and second antennas.
  • the baseband processor may control the second switch connected between the first antenna and the one PA to be connected to the transmission path so as to transmit data to the base station through the first antenna.
  • the switch controls the switch to transmit a reference signal (RS) to the base station through the second antenna, and controls the plurality of LNAs connected to the second antenna to be connected to a bypass path.
  • RS reference signal
  • the SRS transmission timing information may be included in control information transmitted from a base station.
  • the control information includes terminal identification information for identifying the electronic device, antenna identification information regarding to which antenna to transmit through the plurality of antennas, and the SRS transmission timing information regarding a time interval in which the SRS information should be transmitted. It can contain.
  • the baseband processor may control to transmit the SRS information to the base station in a transmission section through the first antenna to the fourth antenna.
  • the switch and the second switch may be controlled to receive a DL MIMO signal from the base station in a second reception section through a plurality of antennas.
  • the DL 2x2 MIMO signal may be received through the first and second antennas.
  • the first and second DL signals received through the first and second antennas may be signals of the same frequency band.
  • the interference between the first and second antennas is greater than or equal to a second threshold higher than the first threshold, the first and second DL signals received through the first and second antennas are signals of different frequency bands, that is, the first and second antennas. It may be a signal in the second frequency band. Accordingly, while performing DL MIMO in consideration of the inter-antenna interference level according to the channel state, it is advantageous in that allocation of frequency resources can be variably performed according to the interference level.
  • the frequency band through which the SRS information is transmitted may be transmitted through the maximum frequency band that the electronic device can transmit.
  • the frequency band for the DL MIMO signal received in the second reception interval may be a reception frequency band selected by the base station among the maximum frequency band.
  • the baseband processor may receive information on the reception frequency band from the base station in the first reception interval.
  • the RFIC may be controlled to receive a DL MIMO signal from the base station in a second reception section through the reception frequency band.
  • the electronic device includes a plurality of antennas operating in the same band, including a first antenna used for transmission and reception and a second antenna used for reception; A plurality of reception amplification units (LNA) formed between each antenna and a transceiver circuit; A power amplifier (PA) disposed between the transceiver circuit and the plurality of antennas; A switch provided inside the transceiver circuit and forming a path between the second antenna and the one PA; And a coupler that bypasses the plurality of LNAs from the signal from the one PA through the switch and couples it to any one of the plurality of antennas.
  • LNA reception amplification units
  • PA power amplifier
  • the electronic device based on RS transmission timing, feedback by a control unit that sequentially connects the plurality of antennas to the one PA so that each antenna can transmit reference signal (RS) information.
  • RS reference signal
  • a reference signal may be transmitted through all antenna ports using a reception path.
  • the plurality of antennas may further include a third antenna and a fourth antenna used for the reception. At this time, a feedback transmission signal fed back through the coupler may be transmitted as an SRS signal through the second antenna to the fourth antenna.
  • control unit may control to transmit SRS information through the first antenna to the fourth antenna in a first transmission period. Also, in the second transmission section, the RS information may be controlled to be transmitted through any one of the first antenna to the fourth antenna.
  • control unit may control a second switch connected between the first antenna and the one PA so that a signal is transmitted and received in a time division duplex (TDD) having a transmission section and a reception section.
  • TDD time division duplex
  • the switch may be connected to a corresponding antenna port to control transmission of SRS information, and the plurality of LNAs connected to the second antenna may be controlled to be connected to a bypass path.
  • the controller may control a second switch connected between the first antenna and the one PA to be connected to a transmission path so as to transmit data to the base station through the first antenna.
  • the switch controls the switch to transmit the reference signal (RS) to the base station through the second antenna to the fourth antenna, and the plurality of connected to any one of the second antenna to the fourth antenna It can be controlled to connect the LNA of the bypass path (bypass).
  • RS reference signal
  • a first filter connected to the first antenna and a second filter connected to the second antenna may be further included.
  • the control unit while transmitting data on the first frequency band through the first antenna, while transmitting the reference signal (RS) on the second frequency band through the second antenna, the first filter and the first 2 It is possible to control the pass band of the filter to be the first frequency band and the second frequency band. Accordingly, while simultaneously transmitting data and RS through different antennas in a structure sharing one power amplifier, the frequency band can be flexibly adjusted without additional hardware.
  • An electronic device that transmits a reference signal according to the present invention has an advantage in that it is possible to provide an electronic device that can transmit a reference signal through all antenna ports using a feedback reception path.
  • FIGS. 1B and 1C are conceptual views illustrating an example of an electronic device related to the present invention in different directions.
  • FIG. 2 shows a configuration of a wireless communication unit of an electronic device operable in a plurality of wireless communication systems according to the present invention.
  • 3A shows a detailed configuration of an electronic device operable in a plurality of communication systems according to the present invention.
  • 3B shows a structure of a transmission/reception unit when the reference signal transmission such as SRS transmission is not supported in the structure of the transmission/reception unit of the present invention.
  • 3C is a diagram illustrating a method for controlling a switch, LNA, and MUX in a baseband processor, that is, a modem, according to the present invention.
  • FIG. 4A shows a TDD time period in which a transmission period and a reception period according to the present invention are divided.
  • 4B shows a time and frequency domain in which SRS information and RS information are transmitted according to the present invention.
  • 5A is a diagram for transmitting a reference signal using a receive amplifier operating in a bypass mode according to an embodiment of the present invention.
  • 5B shows a detailed structure of a coupler and LNA according to an embodiment of the present invention.
  • FIG. 6 is a detailed configuration of an electronic device that transmits a reference signal RS according to another embodiment of the present invention.
  • Electronic devices described herein include mobile phones, smart phones, laptop computers, digital broadcasting terminals, personal digital assistants (PDAs), portable multimedia players (PMPs), navigation, and slate PCs.
  • Tablet PC tablet PC
  • ultrabook ultrabook
  • wearable device wearable device, for example, a watch-type terminal (smartwatch), glass-type terminal (smart glass), HMD (head mounted display), etc. may be included have.
  • the configuration according to the embodiment described in the present specification can be easily recognized by those skilled in the art that the configuration may be applied to a fixed terminal such as a digital TV, a desktop computer, and a digital signage, except when applicable only to a mobile terminal. will be.
  • FIG. 1A is a block diagram illustrating an electronic device related to the present invention
  • FIGS. 1B and 1C are conceptual views of an electronic device related to the present invention as viewed from different directions.
  • the electronic device 100 includes a wireless communication unit 110, an input unit 120, a sensing unit 140, an output unit 150, an interface unit 160, a memory 170, a control unit 180, and a power supply unit 190 ) And the like.
  • the components shown in FIG. 1A are not essential for implementing an electronic device, and thus, the electronic device described herein may have more or fewer components than those listed above.
  • the wireless communication unit 110 among the components, between the electronic device 100 and the wireless communication system, between the electronic device 100 and another electronic device 100, or the electronic device 100 and an external server It may include one or more modules that enable wireless communication between. Also, the wireless communication unit 110 may include one or more modules connecting the electronic device 100 to one or more networks.
  • the one or more networks may be, for example, a 4G communication network and a 5G communication network.
  • the wireless communication unit 110 may include at least one of a 4G wireless communication module 111, a 5G wireless communication module 112, a short-range communication module 113, and a location information module 114.
  • the 4G wireless communication module 111 may transmit and receive 4G base stations and 4G signals through a 4G mobile communication network. At this time, the 4G wireless communication module 111 may transmit one or more 4G transmission signals to a 4G base station. Also, the 4G wireless communication module 111 may receive one or more 4G reception signals from a 4G base station.
  • uplink (UL) multi-input multi-output (MIMO) may be performed by a plurality of 4G transmission signals transmitted to a 4G base station.
  • downlink (DL) multi-input multi-output (MIMO) may be performed by a plurality of 4G received signals received from a 4G base station.
  • the 5G wireless communication module 112 may transmit and receive 5G base stations and 5G signals through a 5G mobile communication network.
  • the 4G base station and the 5G base station may have a non-stand-alone (NSA) structure.
  • the 4G base station and the 5G base station may be a co-located structure disposed at the same location in the cell.
  • the 5G base station may be arranged in a stand-alone (SA) structure at a location separate from the 4G base station.
  • SA stand-alone
  • the 5G wireless communication module 112 may transmit and receive 5G base stations and 5G signals through a 5G mobile communication network. At this time, the 5G wireless communication module 112 may transmit one or more 5G transmission signals to a 5G base station. Also, the 5G wireless communication module 112 may receive one or more 5G reception signals from a 5G base station.
  • the 5G frequency band may use the same band as the 4G frequency band, which may be referred to as LTE re-farming.
  • a 5G frequency band a Sub6 band, which is a band of 6 GHz or less, may be used.
  • the millimeter wave (mmWave) band may be used as a 5G frequency band to perform broadband high-speed communication.
  • the electronic device 100 may perform beam forming for communication coverage expansion with the base station.
  • a 5G communication system may support a larger number of multi-input multi-output (MIMO) to improve transmission speed.
  • MIMO multi-input multi-output
  • uplink (UL) MIMO may be performed by a plurality of 5G transmission signals transmitted to a 5G base station.
  • DL MIMO may be performed by a plurality of 5G reception signals received from a 5G base station.
  • the wireless communication unit 110 may be in a dual connectivity (DC) state with a 4G base station and a 5G base station through the 4G wireless communication module 111 and the 5G wireless communication module 112.
  • DC dual connectivity
  • a dual connection between a 4G base station and a 5G base station may be referred to as EN-DC (EUTRAN NR DC).
  • EUTRAN is an Evolved Universal Telecommunication Radio Access Network, which means a 4G wireless communication system
  • NR is New Radio, which means a 5G wireless communication system.
  • the 4G base station and the 5G base station have a co-located structure, throughput can be improved through inter-CA (carrier aggregation). Therefore, the 4G base station and the 5G base station can be In the EN-DC state, the 4G reception signal and the 5G reception signal can be simultaneously received through the 4G wireless communication module 111 and the 5G wireless communication module 112.
  • the short-range communication module 113 is for short-range communication, BluetoothTM, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, NFC (Near Field Communication), by using at least one of Wi-Fi (Wireless-Fidelity), Wi-Fi Direct, Wireless USB (Wireless Universal Serial Bus) technology, it can support short-range communication.
  • the short-range communication module 114 may be provided between the electronic device 100 and a wireless communication system, between the electronic device 100 and other electronic devices 100, or through the electronic device 100 through wireless area networks. ) And other electronic devices 100 or a network in which an external server is located may support wireless communication.
  • the short-range wireless communication network may be wireless personal area networks (Wireless Personal Area Networks).
  • short-range communication between electronic devices may be performed using the 4G wireless communication module 111 and the 5G wireless communication module 112.
  • short-range communication may be performed by a device-to-device (D2D) method between electronic devices without going through a base station.
  • D2D device-to-device
  • carrier aggregation is performed using at least one of the 4G wireless communication module 111 and the 5G wireless communication module 112 and the Wi-Fi communication module 113. This can be done.
  • 4G + WiFi carrier aggregation (CA) may be performed using the 4G wireless communication module 111 and the Wi-Fi communication module 113.
  • 5G + WiFi carrier aggregation (CA) may be performed using the 5G wireless communication module 112 and the Wi-Fi communication module 113.
  • the location information module 114 is a module for acquiring a location (or current location) of an electronic device, and representative examples thereof include a Global Positioning System (GPS) module or a Wireless Fidelity (WiFi) module.
  • GPS Global Positioning System
  • WiFi Wireless Fidelity
  • the electronic device utilizes a GPS module
  • the position of the electronic device may be acquired using a signal transmitted from a GPS satellite.
  • the Wi-Fi module is used as an electronic device
  • the location of the electronic device may be acquired based on information of a Wi-Fi module and a wireless access point (AP) that transmits or receives a wireless signal.
  • AP wireless access point
  • the location information module 115 may perform any function of other modules of the wireless communication unit 110 in order to obtain data regarding the location of the electronic device by substitution or additionally.
  • the location information module 115 is a module used to obtain a location (or current location) of the electronic device, and is not limited to a module that directly calculates or acquires the location of the electronic
  • the location of the electronic device may be obtained based on the information of the 5G wireless communication module and the 5G base station that transmits or receives the wireless signal.
  • the 5G base station in the millimeter wave (mmWave) band is deployed in a small cell having a small coverage, so it is advantageous to acquire the location of the electronic device.
  • the input unit 120 may include a camera 121 for inputting a video signal or a video input unit, a microphone for inputting an audio signal (microphone 122), or an audio input unit, a user input unit 123 for receiving information from a user, for example , A touch key, a mechanical key, and the like.
  • the voice data or image data collected by the input unit 120 may be analyzed and processed by a user's control command.
  • the sensing unit 140 may include one or more sensors for sensing at least one of information in the electronic device, surrounding environment information surrounding the electronic device, and user information.
  • the sensing unit 140 includes a proximity sensor 141, an illumination sensor 142, a touch sensor, an acceleration sensor, a magnetic sensor, and gravity G-sensor, gyroscope sensor, motion sensor, RGB sensor, infrared sensor (IR sensor), fingerprint scan sensor, ultrasonic sensor , Optical sensor (e.g., camera (see 121)), microphone (see 122, battery), battery gauge, environmental sensor (e.g. barometer, hygrometer, thermometer, radioactivity sensor, Thermal sensor, gas sensor, etc.), chemical sensors (for example, electronic nose, health care sensor, biometric sensor, etc.).
  • the electronic device disclosed in this specification may combine and use information sensed by at least two or more of these sensors.
  • the output unit 150 is for generating output related to vision, hearing, or tactile sense, and includes at least one of a display unit 151, an audio output unit 152, a hap tip module 153, and an optical output unit 154 can do.
  • the display unit 151 may form a mutual layer structure with the touch sensor or may be integrally formed, thereby realizing a touch screen.
  • the touch screen may function as a user input unit 123 that provides an input interface between the electronic device 100 and a user, and at the same time, provide an output interface between the electronic device 100 and the user.
  • the interface unit 160 serves as a passage with various types of external devices connected to the electronic device 100.
  • the interface unit 160 connects a device equipped with a wired/wireless headset port, an external charger port, a wired/wireless data port, a memory card port, and an identification module. It may include at least one of a port, an audio input/output (I/O) port, a video input/output (I/O) port, and an earphone port.
  • I/O audio input/output
  • I/O video input/output
  • earphone port an earphone port
  • the memory 170 stores data supporting various functions of the electronic device 100.
  • the memory 170 may store a number of application programs (application programs) driven by the electronic device 100, data for operating the electronic device 100, and instructions. At least some of these applications can be downloaded from external servers via wireless communication.
  • at least some of these application programs may exist on the electronic device 100 from the time of shipment for basic functions of the electronic device 100 (for example, an incoming call, a calling function, a message reception, and a calling function).
  • the application program may be stored in the memory 170 and installed on the electronic device 100 to be driven by the controller 180 to perform an operation (or function) of the electronic device.
  • the controller 180 controls the overall operation of the electronic device 100 in addition to the operations related to the application program.
  • the controller 180 may provide or process appropriate information or functions to the user by processing signals, data, information, etc. input or output through the above-described components or by driving an application program stored in the memory 170.
  • controller 180 may control at least some of the components described with reference to FIG. 1A in order to drive the application program stored in the memory 170. Furthermore, the controller 180 may operate by combining at least two or more of the components included in the electronic device 100 to drive the application program.
  • the power supply unit 190 receives external power and internal power to supply power to each component included in the electronic device 100.
  • the power supply unit 190 includes a battery, and the battery may be a built-in battery or a replaceable battery.
  • At least some of the components may operate in cooperation with each other to implement an operation, control, or control method of an electronic device according to various embodiments described below. Further, the operation, control, or control method of the electronic device may be implemented on the electronic device by driving at least one application program stored in the memory 170.
  • the disclosed electronic device 100 includes a terminal body in the form of a bar.
  • the present invention is not limited to this, and may be applied to various structures such as a watch type, a clip type, a glass type, or a folder type, a flip type, a slide type, a swing type, a swivel type to which two or more bodies are movably coupled.
  • the description of a specific type of electronic device may be generally applied to other types of electronic devices.
  • the terminal body may be understood as a concept referring to the electronic device 100 as at least one aggregate.
  • the electronic device 100 includes a case (eg, a frame, a housing, a cover, etc.) forming an exterior. As illustrated, the electronic device 100 may include a front case 101 and a rear case 102. Various electronic components are disposed in the inner space formed by the combination of the front case 101 and the rear case 102. At least one middle case may be additionally disposed between the front case 101 and the rear case 102.
  • a case eg, a frame, a housing, a cover, etc.
  • the electronic device 100 may include a front case 101 and a rear case 102.
  • Various electronic components are disposed in the inner space formed by the combination of the front case 101 and the rear case 102.
  • At least one middle case may be additionally disposed between the front case 101 and the rear case 102.
  • a display unit 151 is disposed on the front of the terminal body to output information. As illustrated, the window 151a of the display unit 151 is mounted on the front case 101 to form the front surface of the terminal body together with the front case 101.
  • electronic components may also be mounted on the rear case 102.
  • Electronic components that can be mounted on the rear case 102 include a removable battery, an identification module, and a memory card.
  • a rear cover 103 for covering the mounted electronic component may be detachably coupled to the rear case 102. Therefore, when the rear cover 103 is separated from the rear case 102, the electronic components mounted on the rear case 102 are exposed to the outside. Meanwhile, some of the side surfaces of the rear case 102 may be implemented to operate as a radiator.
  • the rear cover 103 when the rear cover 103 is coupled to the rear case 102, a part of the side surface of the rear case 102 may be exposed. In some cases, the rear case 102 may be completely covered by the rear cover 103 during the engagement. Meanwhile, an opening for exposing the camera 121b or the sound output unit 152b to the outside may be provided in the rear cover 103.
  • the electronic device 100 includes a display unit 151, first and second sound output units 152a and 152b, a proximity sensor 141, an illuminance sensor 142, a light output unit 154, the first and second units Cameras 121a and 121b, first and second operation units 123a and 123b, a microphone 122, and an interface unit 160 may be provided.
  • the display unit 151 displays (outputs) information processed by the electronic device 100.
  • the display unit 151 may display execution screen information of an application program driven by the electronic device 100, or UI (User Interface) or GUI (Graphic User Interface) information according to the execution screen information. .
  • two or more display units 151 may be present depending on the implementation form of the electronic device 100.
  • the electronic devices 100 may have a plurality of display units spaced apart or integrally disposed on one surface, or may be disposed on different surfaces.
  • the display unit 151 may include a touch sensor that senses a touch on the display unit 151 so that a control command can be input by a touch method. Using this, when a touch is made to the display unit 151, the touch sensor detects the touch, and the controller 180 can be configured to generate a control command corresponding to the touch based on the touch.
  • the content input by the touch method may be a letter or a number, or an instruction or designable menu item in various modes.
  • the display unit 151 may form a touch screen together with a touch sensor, and in this case, the touch screen may function as a user input unit 123 (see FIG. 1A ). In some cases, the touch screen may replace at least some functions of the first operation unit 123a.
  • the first sound output unit 152a may be implemented as a receiver that delivers a call sound to the user's ear, and the second sound output unit 152b is a loud speaker that outputs various alarm sounds or multimedia playback sounds. ).
  • the light output unit 154 is configured to output light to notify when an event occurs. Examples of the event include message reception, call signal reception, missed calls, alarm, schedule notification, email reception, information reception through an application, and the like.
  • the control unit 180 may control the light output unit 154 so that the output of light is terminated when the user's event confirmation is detected.
  • the first camera 121a processes an image frame of a still image or video obtained by an image sensor in a shooting mode or a video call mode.
  • the processed image frame may be displayed on the display unit 151, and may be stored in the memory 170.
  • the first and second operation units 123a and 123b are examples of the user input unit 123 operated to receive a command for controlling the operation of the electronic device 100, and may also be collectively referred to as a manipulating portion. have.
  • the first and second manipulation units 123a and 123b may be employed in any manner as long as the user operates the device while receiving a tactile feeling, such as touch, push, scroll. Also, the first and second manipulation units 123a and 123b may be employed in such a way that the user operates without a tactile feeling through a proximity touch, a hovering touch, or the like.
  • the electronic device 100 may be provided with a fingerprint recognition sensor for recognizing a user's fingerprint, and the controller 180 may use fingerprint information detected through the fingerprint recognition sensor as an authentication means.
  • the fingerprint recognition sensor may be embedded in the display unit 151 or the user input unit 123.
  • the microphone 122 is configured to receive a user's voice, other sounds, and the like.
  • the microphone 122 may be provided at a plurality of locations and configured to receive stereo sound.
  • the interface unit 160 is a passage through which the electronic device 100 can be connected to an external device.
  • the interface unit 160 is a connection terminal for connection with other devices (eg, earphones, external speakers), a port for short-range communication (for example, an infrared port (IrDA Port), a Bluetooth port (Bluetooth) Port, Wireless LAN Port, etc.], or at least one of a power supply terminal for supplying power to the electronic device 100.
  • the interface unit 160 may be implemented in the form of a socket that accommodates an external card such as a subscriber identification module (SIM) or a user identity module (UIM) or a memory card for storing information.
  • SIM subscriber identification module
  • UIM user identity module
  • a second camera 121b may be disposed on the rear side of the terminal body.
  • the second camera 121b has a shooting direction substantially opposite to the first camera 121a.
  • the second camera 121b may include a plurality of lenses arranged along at least one line.
  • the plurality of lenses may be arranged in a matrix format.
  • Such a camera may be referred to as an array camera.
  • images may be captured in a variety of ways using a plurality of lenses, and better quality images may be obtained.
  • the flash 124 may be disposed adjacent to the second camera 121b. When the flash 124 photographs the subject with the second camera 121b, light is directed toward the subject.
  • a second sound output unit 152b may be additionally disposed on the terminal body.
  • the second sound output unit 152b may implement a stereo function together with the first sound output unit 152a, or may be used to implement a speakerphone mode during a call.
  • the terminal body may be provided with at least one antenna for wireless communication.
  • the antenna may be built in the terminal body or may be formed in the case. Meanwhile, a plurality of antennas connected to the 4G wireless communication module 111 and the 5G wireless communication module 112 may be disposed on the side of the terminal.
  • the antenna may be formed of a film type and attached to the inner surface of the rear cover 103, or a case including a conductive material may be configured to function as an antenna.
  • a plurality of antennas disposed on the side of the terminal may be implemented in four or more to support MIMO.
  • the 5G wireless communication module 112 operates in a millimeter wave (mmWave) band
  • mmWave millimeter wave
  • a plurality of array antennas may be disposed in the electronic device.
  • the terminal body is provided with a power supply unit 190 (see FIG. 1A) for supplying power to the electronic device 100.
  • the power supply unit 190 may include a battery 191 built in the terminal body or configured to be detachable from the outside of the terminal body.
  • the electronic device includes a first power amplifier 210, a second power amplifier 220 and an RFIC 250. Also, the electronic device may further include a modem (Modem 400) and an application processor (AP).
  • the modem (Modem, 400) and the application processor (AP, 500) is physically implemented in one chip, it may be implemented in a logical and functionally separated form.
  • the present invention is not limited thereto, and may be implemented in the form of physically separated chips depending on the application.
  • the RFIC 250 and the modem 400 may be referred to as a transceiver circuit (250) and a baseband processor (400), respectively.
  • the electronic device includes a plurality of low noise amplifiers (LNAs) 410 to 440 at the receiver.
  • LNAs low noise amplifiers
  • the first power amplifier 210, the second power amplifier 220, the control unit 250 and the plurality of low noise amplifiers 310 to 340 are all operable in the first communication system and the second communication system.
  • the first communication system and the second communication system may be 4G communication systems and 5G communication systems, respectively.
  • the RFIC 250 may be configured as a 4G/5G integrated type, but is not limited thereto, and may be configured as a 4G/5G separated type according to an application.
  • the RFIC 250 is configured as a 4G/5G integrated type, it is advantageous in terms of synchronization between 4G/5G circuits, and has an advantage that control signaling by the modem 400 can be simplified.
  • the RFIC 250 when configured as a 4G/5G separated type, it may be referred to as a 4G RFIC and a 5G RFIC, respectively.
  • the RFIC 250 when the band difference between the 5G band and the 4G band is large, such as when the 5G band is composed of a millimeter wave band, the RFIC 250 may be configured as a 4G/5G separated type.
  • the RFIC 250 when the RFIC 250 is configured as a 4G/5G separated type, there is an advantage that the RF characteristics can be optimized for each of the 4G band and the 5G band.
  • the RFIC 250 is configured as a 4G/5G separated type, it is possible that the 4G RFIC and the 5G RFIC are logically and functionally separated and physically implemented in one chip.
  • the application processor (AP, 500) is configured to control the operation of each component of the electronic device. Specifically, the application processor (AP, 500) may control the operation of each component of the electronic device through the modem 400.
  • the modem 400 may be controlled through a power management IC (PMIC) for low power operation of an electronic device. Accordingly, the modem 400 may operate the power circuits of the transmitter and receiver through the RFIC 250 in a low power mode.
  • PMIC power management IC
  • the application processors AP and 500 may control the RFIC 250 through the modem 300 as follows. For example, if the electronic device is in the idle mode, at least one of the first and second power amplifiers 110 and 120 operates in the low power mode or is turned off (RFIC) through the modem 300 250 can be controlled.
  • RFIC turned off
  • the application processor AP, 500 may control the modem 300 to provide wireless communication capable of low-power communication.
  • the application processor AP 500 may control the modem 400 to enable wireless communication at the lowest power. Accordingly, even if the throughput is slightly sacrificed, the application processors AP and 500 may control the modem 400 and the RFIC 250 to perform short-range communication using only the short-range communication module 113.
  • the modem 300 may be controlled to select an optimal air interface.
  • the application processor (AP, 500) may control the modem 400 to receive through both the 4G base station and the 5G base station according to the remaining battery power and available radio resource information.
  • the application processor (AP, 500) may receive the remaining battery information from the PMIC, the available radio resource information from the modem 400. Accordingly, if the remaining battery power and available radio resources are sufficient, the application processors AP and 500 may control the modem 400 and the RFIC 250 to receive through both the 4G base station and the 5G base station.
  • the multi-transceiving system of FIG. 2 may integrate a transmitter and a receiver of each radio system into one transceiver. Accordingly, there is an advantage in that the circuit part that integrates the two types of system signals can be eliminated at the RF front-end.
  • front end components can be controlled by an integrated transmission/reception unit, it is possible to integrate the front end components more efficiently when the transmission/reception systems are separated for each communication system.
  • the multi-transmission/reception system as shown in FIG. 2 can control other communication systems as necessary, and has the advantage of efficient resource allocation because it can minimize system delay.
  • the first power amplifier 210 and the second power amplifier 220 may operate in at least one of the first and second communication systems.
  • the first and second power amplifiers 220 are operable in both the first and second communication systems.
  • the first and second power amplifiers 210 and 220 may operate in the 4G band, and the other in the millimeter wave band. have.
  • 4x4 MIMO can be implemented using 4 antennas as shown in FIG. 2.
  • 4x4 DL MIMO may be performed through downlink (DL).
  • the first to fourth antennas ANT1 to ANT4 may be configured to operate in both the 4G band and the 5G band.
  • the first to fourth antennas ANT1 to ANT4 may be configured to operate in any one of the 4G band and the 5G band.
  • each of a plurality of separate antennas may be configured as an array antenna in the millimeter wave band.
  • 2x2 MIMO may be implemented using two antennas connected to the first power amplifier 210 and the second power amplifier 220 among the four antennas.
  • 2x2 UL MIMO (2 Tx) may be performed through UL.
  • a transmission signal may be branched from each of one or two transmission paths, and the branched transmission signal may be connected to a plurality of antennas.
  • a switch-type splitter or a power divider is built in the RFIC corresponding to the RFIC 250, so there is no need for a separate component to be placed outside, thereby improving component mountability.
  • a transmitter (TX) of two different communication systems can be selected by using a single pole double throw (SPDT) switch inside the RFIC corresponding to the controller 250.
  • SPDT single pole double throw
  • an electronic device operable in a plurality of wireless communication systems may further include a duplexer 231, a filter 232, and a switch 233.
  • the duplexer 231 is configured to separate the signals of the transmission band and the reception band from each other. At this time, signals of a transmission band transmitted through the first and second power amplifiers 210 and 220 are applied to the antennas ANT1 and ANT4 through the first output ports of the duplexer 231. On the other hand, the signals of the reception band received through the antennas ANT1 and ANT4 are received by the low noise amplifiers 310 and 340 through the second output port of the duplexer 231.
  • the filter 232 may be configured to pass signals in a transmission band or a reception band and block signals in the other band.
  • the filter 232 may be composed of a transmission filter connected to the first output port of the duplexer 231 and a reception filter connected to the second output port of the duplexer 231.
  • the filter 232 may be configured to pass only signals in the transmission band or only signals in the reception band depending on the control signal.
  • the switch 233 is configured to deliver either a transmit signal or a receive signal.
  • the switch 233 may be configured in the form of a single pole double throw (SPDT) to separate a transmission signal and a reception signal in a time division duplex (TDD) method.
  • the transmission signal and the reception signal are signals of the same frequency band, and accordingly, the duplexer 231 may be implemented in a circulator form.
  • the switch 233 is also applicable to a frequency division multiplexing (FDD) method.
  • the switch 233 may be configured in the form of a double pole double throw (DPDT) to connect or block the transmission signal and the reception signal, respectively.
  • DPDT double pole double throw
  • the electronic device may further include a modem 400 corresponding to the control unit.
  • the RFIC 250 and the modem 400 may be referred to as a first controller (or first processor) and a second controller (second processor), respectively.
  • the RFIC 250 and the modem 400 may be implemented as physically separated circuits.
  • the RFIC 250 and the modem 400 may be physically divided into logical or functional circuits.
  • the modem 400 may perform control and signal processing for transmission and reception of signals through different communication systems through the RFIC 250.
  • the modem 400 may be obtained through control information received from a 4G base station and/or a 5G base station.
  • the control information may be received through a physical downlink control channel (PDCCH), but is not limited thereto.
  • PDCCH physical downlink control channel
  • the modem 400 may control the RFIC 250 to transmit and/or receive signals through the first communication system and/or the second communication system at specific time and frequency resources. Accordingly, the RFIC 250 may control transmission circuits including the first and second power amplifiers 210 and 220 to transmit a 4G signal or a 5G signal in a specific time period. In addition, the RFIC 250 may control reception circuits including the first to fourth low noise amplifiers 310 to 340 to receive a 4G signal or a 5G signal in a specific time period.
  • the electronic device according to the present invention can operate in a plurality of communication systems.
  • an electronic device that transmits a reference signal according to the present invention is operable in a first communication system and a second communication system.
  • the first communication system and the second communication system may be 4G (LTE) communication systems and 5G communication systems, but are not limited thereto and may be changed according to application.
  • FIG. 3A shows a detailed configuration of an electronic device operable in a plurality of communication systems according to the present invention.
  • the electronic device includes a plurality of antennas ANT1 to ANT4, power amplifiers PA and 1210, a coupler 1240, a transceiver circuit 1250, a switch 1251, and a second switch 1260.
  • the electronic device includes a reception amplification unit (LNA, 1310 to 1340), and a baseband processor 1400.
  • LNA reception amplification unit
  • the transceiver circuit 1250 may be referred to as an RFIC 1250, but may also perform some functions of IFIC.
  • the baseband processor 1400 may be referred to as a control unit, a communication processor (CP), or a modem.
  • the application processor 1500 may be referred to as an AP or a second control unit.
  • the structure of the transmitting and receiving unit for transmitting the reference signal according to the present invention is not limited to the 1T4R structure as shown in FIG. 3A. That is, it may be applied to any transmission/reception asymmetric structure, such as 2T4R, in which the number of transmission units is less than the number of reception units.
  • each antenna of FIG. 3A may include a plurality of physical antennas for beamforming, depending on the case.
  • the present invention is to solve the above-mentioned problems, and proposes a method of transmitting a reference signal through all antennas (ports) using a coupler and multiple switches.
  • multiple switches may be arranged between the power amplifier and the antenna.
  • the multiple switches disposed in front of the power amplifier have a problem in that the physical size increases as the size of the power amplifier increases, thereby increasing the size of the electronic device.
  • An object of the present invention is to implement a SRS (Sounding Reference Signal) function to increase the efficiency of communication by giving more power to an antenna that is easier to communicate among a plurality of antennas for efficient communication in 5G operation. It is for.
  • a structure for transmitting a TX signal fed back to a Coupler as an SRS signal through antennas #2, 3, and 4 (ANT 2 to ANT4) is used.
  • the present invention features the following components, and these components may be implemented by omitting or modifying some elements depending on the application.
  • a plurality of antennas operating in the same band including a first antenna used for transmission and reception and a second antenna used for reception;
  • a switch provided inside the RFIC and forming a path between the second antenna and the one PA;
  • a coupler that couples the signals from the one PA to the plurality of ones by bypassing the plurality of LNAs through the switch;
  • a modem that sequentially connects each of the plurality of antennas to the one PA so that each antenna can transmit SRS information.
  • Figure 3b shows the structure of the transceiver in the case of not supporting the reference signal transmission, such as SRS transmission, in the structure of the transceiver of the present invention.
  • the switch 1251 is not provided in the RFIC 1250.
  • the structure of FIG. 3 maintains the same RF front-end structure as the structure of FIG. 3B, and instead, a difference in that a multi-switch structure capable of connecting from a feedback path to an RX port is added inside the RFIC. have.
  • TX SRS may be output from each RX port by utilizing the feedback RF path through the coupler 1240.
  • the TX SRS can be selectively transmitted using the multiple switches 1251 inside the RFIC 1250. That is, a structure in which the transmission (TX) signal fed back through the feedback path is radiated to the outside through antennas #2, 3, and 4 (ANT2 to ANT4), and a plurality of LNAs 1320 to 13409 operate in the bypass mode. do.
  • a plurality of antennas ANT1 to ANT4 include a first antenna ANT1 used for transmission and reception and a second antenna ANT2 used for reception.
  • a third antenna ANT3 and a fourth antenna ANT4 used for reception may be further included.
  • the plurality of antennas ANT1 to ANT4 may operate in both the 4G frequency band and the 5G frequency band, but the present invention will mainly be described in terms of transmission of a reference signal in the 5G frequency band and transmission and reception of data accordingly.
  • the plurality of antennas ANT1 to ANT4 are antennas operating in the same band between each other corresponding to the 5G frequency band.
  • FIG. 4A shows a TDD time period in which a transmission period and a reception period according to the present invention are divided.
  • FIG. 4B shows a time and frequency domain in which SRS information and RS information according to the present invention are transmitted.
  • a time division duplex (TDD) scheme may be used in a series of processes of transmitting a reference signal and transmitting and receiving data to and from a base station through a corresponding antenna.
  • TDD time division duplex
  • the uplink channel characteristic is applicable to the downlink channel characteristic.
  • the reference signal transmission scheme according to the present invention can be applied to a TDD scheme in which symmetry or reciprocity between uplink/downlink is established.
  • the present invention is not limited to the TDD scheme, and is applicable to a frequency division duplex (FDD) scheme in consideration of characteristic differences between uplink/downlink.
  • FDD frequency division duplex
  • the baseband processor 1400 may control to transmit SRS information to the base station through the first to fourth antennas ANT1 to ANT4 in the transmission section A. .
  • the frequency band through which the SRS information is transmitted may be transmitted through the maximum frequency band that the electronic device can transmit.
  • the SRS transmission timing in which the SRS is transmitted may be a specific predetermined symbol period in a subframe (eg, a specific symbol period in the control region), but is not limited thereto.
  • the frequency domain in which the SRS is transmitted is the entire frequency domain (maximum frequency band), so the SRS can be transmitted in a wideband.
  • UE1 may transmit the first SRS through the entire frequency band from the first antenna ANT1.
  • UE1 may transmit the first SRS through the second antenna ANT1 through some frequency bands f3 and f4.
  • UE2 may transmit the second SRS through the remaining frequency bands f1 and f2.
  • the base station may divide the entire frequency band and receive SRS information for UE1 and UE2. Accordingly, the base station has an advantage of dynamically allocating antennas and frequency resources to a plurality of terminals in consideration of a channel environment and a bandwidth required by the terminal. Therefore, instead of determining the channel state using both SRS and CSI-RS, there is an advantage in that resource allocation can be completed by transmitting and receiving SRS information by dividing bandwidth.
  • both UE 1 and UE2 transmit SRS, and there is an advantage in that it is possible to identify a channel state and allocate resources in consideration of mutual interference in a corresponding frequency band. Meanwhile, when UE2 requests broadband communication rather than UE1, the frequency band for UE2 may be extended in the fourth SRS transmission timing.
  • Such a method for transmitting a reference signal is applicable to a reference signal transmitted and received through a data area in addition to information transmitted and received through a control area, such as SRS information.
  • one terminal may transmit SRS through the entire frequency band.
  • the peripheral terminal may operate in a muting mode, which does not transmit any data at the corresponding SRS transmission timing.
  • the corresponding SRS transmission resource may be considered to be puncturing.
  • the interference measured by other terminals (or other entities such as a base station) in the cell is intra-cell interference.
  • the interference measured in another terminal (or other entity such as a base station) of an adjacent cell outside the cell is inter-cell interference.
  • the base station may receive intra-cell interference and channel state by receiving the SRS information of the corresponding terminal, and may recognize inter-cell interference by receiving SRS information of another terminal of an adjacent cell.
  • interference information such as SRS information of other terminals of adjacent cells may be directly received or exchanged through an X2 interface with an ingen cell base station.
  • the base station has an advantage that it is possible to determine which resource (time, frequency, antenna port) to effectively transmit data to the corresponding terminal in consideration of interference to the adjacent cell in addition to the corresponding cell.
  • FIG. 3A a plurality of reception amplification units LNAs 1310 to 1340 are formed between each antenna and the RFIC 1250 to amplify the received signal with low noise. Meanwhile, the plurality of reception amplification units LNAs 1310 to 1340 may operate in a bypass mode in which a signal is passed through as it is without amplifying the received signal.
  • FIG. 5A is a diagram for transmitting a reference signal using a receive amplifier operating in a bypass mode according to an embodiment of the present invention.
  • the present invention has an advantage in that a plurality of reference signals can be transmitted through a plurality of antennas using only one power amplifier 1210.
  • a plurality of reference signals can be transmitted through a plurality of antennas through one power amplifier (PA, 1210) and a coupler 1240 disposed between the RFIC 1250 and a plurality of antennas.
  • PA power amplifier
  • the switch 1251 is provided inside the RFIC 1250 and is configurable to form a path between the second antenna ANT2 and one PA 1210.
  • the baseband processor 1400 controls to be sequentially transmitted through the second to fourth antennas ANT2 to ANT4 based on different SRS transmission timings included in the signal coupled from the coupler 1240. Can.
  • different SRS transmission timings may be determined according to different SRS information. That is, the baseband processor 1400 is based on different SRS transmission timing, the switch 1251 and the second switch through the RFIC 1250 to be sequentially transmitted through the second antenna to the fourth antenna (ANT2 to ANT4) and the second switch ( 1260).
  • the second switch 1260 when the second SRS is transmitted through the second antenna ANT2, the second switch 1260 is connected to one PA 1210, and the switch 1251 is bypassed to the second LNA 1320. Leads to the path.
  • the second switch 1260 when transmitting the third SRS through the third antenna ANT3, the second switch 1260 is connected to one PA 1210, and the switch 1251 is a bypass path of the third LNA 1330 Is connected to.
  • the second switch 1260 is connected to one PA 1210, and the switch 1251 is a bypass path of the fourth LNA 1330. Is connected to.
  • the signal sizes of the second to fourth SRSs transmitted through the second to fourth antennas ANT2 to ANT4 may be lower than the first SRS transmitted through the first antenna ANT1.
  • the signal size of the second to fourth SRS is 10 dB lower than the signal size of the first SRS.
  • the base station can determine the channel state in consideration of the signal size and, accordingly, determine the corresponding antenna port to transmit the signal.
  • the baseband processor 1400 may control the RFIC 1250 to dynamically adjust the coupling ratio of the coupler 1240.
  • Figure 5b shows the detailed structure of the coupler and LNA according to an embodiment of the present invention.
  • the coupling ratio can be dynamically adjusted by adjusting the values of the first variable resistor R1 and the second variable resistor R2 connected to the first output port and the second output port of the coupler 1240. It has the advantage of being.
  • the second to fourth SRSs transmitted through the second to fourth antennas ANT2 to ANT4 are increased by increasing the value of the second variable resistor R2 connected to the second output port which is a coupled port.
  • the signal sizes of the second to fourth SRSs are the same as the signal sizes of the first SRSs. Accordingly, the base station has an advantage in that it is possible to determine the channel state without considering the difference in the received SRS signal size.
  • the coupler 1240 bypasses a plurality of LNAs 1320 to 1340 through a switch 1251, and a signal from one PA 1210 is coupled to any one of the plurality of antennas. It is composed.
  • the baseband processor 1400 may sequentially connect a plurality of antennas to one PA 1210 so that each antenna ANT 1 to ANT4 can transmit SRS information based on the SRS transmission timing.
  • the baseband processor 1400 may control the switch 1240 to be connected to a transmission path in advance.
  • the baseband processor 1400 may control the switch 1240 to be connected to the transmission path in advance.
  • the baseband processor 1400 controls the switch 1240 to be connected to the transmission path in advance so that the signal from one PA 1210 can be transmitted to the feedback path of the RFIC in the data transmission section, not the SRS transmission timing. can do.
  • the baseband processor 1400 is connected to the bypass paths of the plurality of LNAs 1320 to 1340 prior to the SRS transmission timing, so that the second SRS to the fourth SRS are transmitted through the bypass path during SRS transmission. Can be controlled.
  • the SRS transmission can be successfully performed at the SRS transmission timing by operating the plurality of LNAs 1320 to 1340 in the bypass mode before the SRS transmission and connecting the switch 1240 to the transmission path in advance. There is this.
  • the process of transmitting SRS information at each antenna port is as follows.
  • the baseband processor 1400 includes a plurality of LNAs 1320 in which signals from one PA 1210 are connected to the second to fourth antennas ANT2 to ANT4 through a switch 1251 at SRS transmission timing. 1340), the SRS information may be controlled to be transmitted through any one of the bypass paths.
  • the SRS signal may be performed as follows through each antenna.
  • SRS2 TX mixer -> PA(1210) -> Coupler(1240) (SPDT isolated) -> Multiplexer(1251) -> LNA2 (1320)-> filter2 -> ANT#2
  • SRS3 TX mixer -> PA(1210) -> Coupler(1240) (SPDT isolated) -> Multiplexer(1251) -> LNA3 (1330)-> -> filter3 -> ANT#3
  • SRS4 TX mixer -> PA(1210) -> Coupler(1240) (SPDT isolated) multiplexer(1251) -> LNA4 (1340)-> filter4 -> ANT#4
  • Figure 3c is a diagram showing a switch, LNA and MUX control method in a baseband processor, that is, a modem according to the present invention.
  • the baseband processor 1400 may operate an RF front-end (RFFE) switch, LNA, and multiplexer according to a network (base station) operation scenario. Meanwhile, a desired SRS TX can be transmitted through control of the switch, LNA, and multiplexer.
  • RFFE RF front-end
  • Table 1 shows the operating states of the SPDT switch 1260, the MUX switch 1251, and the LNA2 through LNA4 by the baseband processor according to the present invention.
  • the corresponding LNA when transmitting the second SRS to the fourth SRS through the feedback path, the corresponding LNA must be operated in the bypass mode.
  • the remaining LNAs other than the corresponding LNA may maintain an OFF state.
  • the baseband processor 1400 is a time division multiplex (TDD) having a transmission section (A) and a reception section (B, C) Time Division Duplex (TDD) to transmit and receive signals to the first antenna (ANT) and one
  • TDD Time Division Duplex
  • the baseband processor 1400 may control the second switch 1260 to be connected between the first antenna ANT and one PA 120 in the transmission section A.
  • the baseband processor 1400 may control the second switch 1260 to be connected between the first antenna ANT and the first LNA 1310 in the reception periods B and C.
  • a guard period may be set in the transmission period A and the reception periods B and C in consideration of the TX/RX switching time.
  • the baseband processor 1400 controls the switch 1251 to transmit SRS information by being connected to the corresponding antenna port in the transmission section A, and a plurality of LNAs 1320 to 1340 connected to the second antenna ANT2. It can be controlled to be connected to the bypass (bypass) path.
  • the above-mentioned information on SRS transmission timing may be included in control information transmitted from a base station.
  • the control information includes terminal identification information for identifying the electronic device, antenna identification information regarding to which antenna to transmit through the plurality of antennas, and the SRS transmission timing information regarding a time interval in which the SRS information should be transmitted. It can contain. Accordingly, a successful terminal that blindly decodes the corresponding control information may transmit SRS information to the base station through the corresponding time and frequency resources at the corresponding antenna port.
  • the baseband processor 1400 may control to transmit the SRS information from the transmission section A to the base station through the first to fourth antennas ANT1 to ANT4.
  • the baseband processor 1400 may control to receive information on a downlink (DL) antenna port selected from a base station in a first reception interval (B).
  • DL downlink
  • B first reception interval
  • the baseband processor 1400 based on the information on the DL antenna port, the switch 1251 and the second switch 1260 to receive a DL MIMO signal from the base station in a second reception section through a plurality of antennas Can be controlled.
  • the switch 1251 is connected between the first antenna ANT1 and the first LNA 1310 so that the electronic device receives the DL 2x2 MIMO signal through the first and second antennas.
  • the switch 1260 is connected to the bypass path of the second LNA 1320 so that the signal coupled through the coupler 1240 is transmitted to the second antenna ANT2.
  • DL 2x2 MIMO signals may be received through the first and second antennas ANT 1 and ANT2.
  • the first and second DL signals received through the first and second antennas may be signals of the same frequency band.
  • the interference between the first and second antennas is greater than or equal to a second threshold higher than the first threshold, the first and second DL signals received through the first and second antennas are signals of different frequency bands, that is, the first and second antennas. It may be a signal in the second frequency band. Accordingly, while performing DL MIMO in consideration of the inter-antenna interference level according to the channel state, it is advantageous in that allocation of frequency resources can be variably performed according to the interference level.
  • the electronic device transmitting the reference signal according to the present invention is not limited to sequentially transmitting SRS information through different antenna ports. According to another embodiment of the present invention, it is applicable to electronic devices that transmit other RS information than SRS information.
  • FIG. 6 is a detailed configuration of an electronic device that transmits a reference signal RS according to another embodiment of the present invention.
  • a reference signal may be transmitted through the second antenna ANT2.
  • a device having a single output rather than a device having two outputs, such as a coupler, data transmission and reference signal transmission cannot be performed simultaneously. Therefore, in the present invention, it is possible to propose a method of simultaneously transmitting data and RS in the data region as well as transmitting the SRS in the control region through different antennas.
  • the first to fourth SRSs may be sequentially transmitted in the SRS transmission section through the first to fourth antennas ANT1 to ANT4.
  • RS can be transmitted through any one of the second to fourth antennas ANT2 to ANT4 at the same time.
  • the RS transmitted through any one of the second to fourth antennas ANT2 to ANT4 may include Channel State Information (CSI)-RS, Demodulation (DM)-RS, and the like.
  • CSI Channel State Information
  • DM Demodulation
  • the present invention is not limited thereto, and may include any RS that can be transmitted through the data area A2.
  • the reference signals transmitted through the first to fourth antennas ANT1 to ANT4 may be arbitrary reference signals transmitted through a control region A1 such as a Cell Specific RS (CRS) in addition to the SRS.
  • CRS Cell Specific RS
  • the frequency band may be the same or at least partially different.
  • the frequency band may be the same or at least partially different while transmitting data through the second antenna ANT2 while transmitting RS through the first antenna ANT1 in the data area A2.
  • the coupler 1240 may be configured to dynamically adjust the coupling ratio between the first and second output ports as shown in FIG. 5B. Accordingly, the ratios of the first and second variable resistors may be adjusted so that the size of the reference signal is larger than the size of the transmission signal including data.
  • the baseband processor 1400 transmits data on the first frequency band f1 through the first antenna ANT1 and transmits RS on the second frequency band f2 through the second antenna ANT2.
  • the RFIC 1250 and the first and second filters may be controlled to transmit.
  • the baseband processor 140 transmits the bands of the first and second filters (filters 1 and 2) through the RFIC 1250, respectively, to the first and second frequency bands ( f1, f2).
  • the baseband processor 1400 corresponding to the control unit transmits data on the first frequency band through the first antenna ANT1, and the reference signal RS on the second frequency band through the second antenna ANT2.
  • the baseband processor 1400 may control the pass bands of the first filter (filter 1) and the second filter (filter 2) to be the first frequency band and the second frequency band. Accordingly, in a structure in which one power amplifier is shared, data and RS are simultaneously transmitted through different antennas, and there is an advantage in that the frequency band can be flexibly adjusted without additional hardware.
  • the transmission/reception structure and the reference signal transmission method according to the present invention have the advantage of being capable of channel estimation and interference control through other antenna ports while transmitting and receiving data through the selected antenna port through SRS.
  • the content described in FIG. 3 is also applicable to the configuration of FIG. 6.
  • the plurality of antennas ANT1 to ANT4 include a first antenna ANT1 used for transmission and reception and a second antenna ANT4 used for reception, and may operate in the same band.
  • a plurality of receiving amplifiers (LNA, 1310 to 1340) is formed between each antenna and the transceiver circuit (transceiver circuit, 1250). Also, one power amplifier PA and 1210 may be disposed between the transceiver circuit 1250 and the plurality of antennas ANT1 to ANT4.
  • the switch 1251 is provided inside the transceiver circuit 1250, and forms a path between the second antenna (ANT2) and one PA (1210).
  • the coupler 1240 may couple the signals from one PA 1210 to any one of the plurality of antennas ANT2 to ANT4 by bypassing the plurality of LNAs through the switch 1251.
  • the controller 1400 sequentially transmits a plurality of antennas ANT1 to ANT4 to the one PA 1210 so that each antenna can transmit reference signal (RS) information based on the RS transmission timing. Can be connected. Accordingly, a feedback transmission signal fed back through the coupler 1240 may be transmitted as an SRS signal through the second antenna to the fourth antennas ANT2 to ANT4.
  • RS reference signal
  • control unit 1400 may control the SRS information to be transmitted through the first to fourth antennas ANT1 to ANT4 in the first transmission section A1.
  • RS information may be controlled to be transmitted through any one of the first to fourth antennas ANT1 to ANT4.
  • control unit 1400 is a second switch 1260 connected between the first antenna ANT1 and one PA 1210 so that a signal is transmitted and received by Time Division Duplex (TDD) having a transmission section and a reception section. ) Can be controlled.
  • TDD Time Division Duplex
  • the switch 1251 may be connected to a corresponding antenna port to control transmission of SRS information, and a plurality of LNAs connected to the second antenna ANT2 may be controlled to be connected to a bypass path.
  • control unit 1400 controls the second switch 1260 connected between the first antenna ANT1 and one PA 1210 to be connected to the transmission path so as to transmit data to the base station through the first antenna ANT1. can do.
  • the control unit 1400 may control the switch 1260 to transmit the reference signal RS to the base station through the second to fourth antennas ANT2 to ANT4.
  • the control unit 1400 may control a plurality of LNAs connected to any one of the second to fourth antennas ANT2 to ANT4 to be connected to a bypass path.
  • the electronic device may receive data from the base station.
  • the baseband processor 1400 corresponding to the control unit 1400 may be controlled to receive information on a downlink (DL) antenna port selected from a base station in a first reception period (B).
  • DL downlink
  • B first reception period
  • information on the reception frequency band may be further received from the base station.
  • the frequency band through which the SRS information is transmitted may be transmitted through the maximum frequency band that the electronic device can transmit.
  • the baseband processor 1400 may control to receive the DL MIMO signal from the base station through a plurality of antennas based on the information on the DL antenna port in the second reception section C. To this end, the baseband processor 1400 may control the switch 1251 and the second switch 1260 before the second reception period. At this time, the frequency band for the DL MIMO signal received in the second reception interval (C) may be a reception frequency band selected by the base station among the maximum frequency band.
  • the baseband processor 1400 may receive information on the reception frequency band from the base station in the first reception period (B). Also, the RFIC 1250 may be controlled to receive the DL MIMO signal from the base station in the second reception interval C through the reception frequency band.
  • the first reception period B and the second reception period C may be a control region and a data region within one reception period.
  • information transmitted and received in the first reception interval (B) and the second reception interval (C) may be transmitted through a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH), respectively. It is not limited.
  • the first reception interval B and the second reception interval C are not limited to consecutive time intervals, and a transmission interval may exist between the reception intervals. Meanwhile, in the transmission section between the first reception section B and the second reception section C, if there is control information acquired through the first reception section B, data is transmitted to the base station through transmission resources allocated based on this. Can transmit.
  • An electronic device that transmits a reference signal according to the present invention has an advantage in that it is possible to provide an electronic device that can transmit a reference signal through all antenna ports using a feedback reception path.
  • the design of the transmission unit including the power amplifier and the transceiver and the reception unit including the low-noise amplifier and the RFIC and driving thereof can be implemented as computer-readable codes on a medium in which a program is recorded.
  • the computer-readable medium includes all kinds of recording devices in which data readable by a computer system is stored. Examples of computer-readable media include a hard disk drive (HDD), solid state disk (SSD), silicon disk drive (SDD), ROM, RAM, CD-ROM, magnetic tape, floppy disk, and optical data storage device. This includes, and is also implemented in the form of a carrier wave (eg, transmission over the Internet).
  • the computer may include a control unit 180 of the terminal.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Un dispositif électronique, selon la présente invention, comprend : une pluralité d'antennes fonctionnant dans la même bande, qui contient une première antenne utilisée pour l'émission et la réception, et une deuxième antenne utilisée pour la réception ; une pluralité d'amplificateurs à faible bruit (LNA) formés entre chaque antenne et un circuit intégré à radiofréquence (RFIC) ; un amplificateur de puissance unique (PA) disposé entre le RFIC et la pluralité d'antennes ; un commutateur disposé à l'intérieur du RFIC et formant un trajet entre la deuxième antenne et le PA unique ; et un coupleur permettant de coupler le signal du PA unique à une antenne quelconque de la pluralité d'antennes en contournant la pluralité de LNA par l'intermédiaire du commutateur. Simultanément, le dispositif électronique comprend un processeur de bande de base qui connecte séquentiellement la pluralité d'antennes au PA unique de sorte que chaque antenne puisse émettre des informations de signal de référence de sondage (SRS) en fonction de la synchronisation d'émission de SRS, et un signal de référence peut être émis par tous les ports d'antenne en utilisant un trajet de réception de rétroaction.
PCT/KR2019/000260 2019-01-08 2019-01-08 Dispositif électronique d'émission de signal de référence WO2020145421A1 (fr)

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CN112615631A (zh) * 2020-12-18 2021-04-06 维沃移动通信有限公司 射频接收电路、射频信号接收方法、装置和电子设备
CN113037323A (zh) * 2021-02-26 2021-06-25 维沃移动通信有限公司 射频电路、射频电路的控制方法和电子设备
CN113078922A (zh) * 2021-03-23 2021-07-06 维沃移动通信有限公司 射频电路、射频电路的控制方法和装置、电子设备
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CN113382484A (zh) * 2021-07-23 2021-09-10 Oppo广东移动通信有限公司 客户前置设备
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CN114124140A (zh) * 2021-11-30 2022-03-01 Oppo广东移动通信有限公司 射频系统和通信设备
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US11973529B2 (en) * 2019-01-24 2024-04-30 Vivo Mobile Communication Co., Ltd. Signal transceiver apparatus and terminal device
US20210351812A1 (en) * 2019-01-24 2021-11-11 Vivo Mobile Communication Co., Ltd. Signal transceiver apparatus and terminal device
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CN112564731B (zh) * 2020-12-03 2022-03-25 维沃移动通信有限公司 信号处理电路、方法和电子设备
CN112615631A (zh) * 2020-12-18 2021-04-06 维沃移动通信有限公司 射频接收电路、射频信号接收方法、装置和电子设备
CN112615631B (zh) * 2020-12-18 2022-06-07 维沃移动通信有限公司 射频接收电路、射频信号接收方法、装置和电子设备
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CN113037323A (zh) * 2021-02-26 2021-06-25 维沃移动通信有限公司 射频电路、射频电路的控制方法和电子设备
CN113078922A (zh) * 2021-03-23 2021-07-06 维沃移动通信有限公司 射频电路、射频电路的控制方法和装置、电子设备
CN113078922B (zh) * 2021-03-23 2022-08-09 维沃移动通信有限公司 射频电路、射频电路的控制方法和装置、电子设备
CN113258944A (zh) * 2021-05-12 2021-08-13 展讯通信（上海）有限公司 Srs发射电路、方法和装置
CN113258944B (zh) * 2021-05-12 2023-05-16 展讯通信（上海）有限公司 Srs发射电路、方法和装置
CN113382484B (zh) * 2021-07-23 2023-01-31 Oppo广东移动通信有限公司 客户前置设备
CN113382484A (zh) * 2021-07-23 2021-09-10 Oppo广东移动通信有限公司 客户前置设备
CN114124140A (zh) * 2021-11-30 2022-03-01 Oppo广东移动通信有限公司 射频系统和通信设备

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