Method and apparatus for calibrating phased array antenna in communication system

Abstract

According to an embodiment, a method for calibrating a phased array antenna in a wireless communication system may comprise the steps of: modulating, by using a first phase set, a first signal generated from a first signal generator; and modulating, by using a second phase set, a second signal generated from a second signal generator. The method may comprise the step of simultaneously transmitting, via a plurality of RF chains included in the phased array antenna, a third signal corresponding to the first signal and a fourth signal corresponding to the second signal. The method may comprise the step of calibrating, by using the third signal and the fourth signal, at least one of a phase and a gain of at least some of the plurality of RF chains.

Description

Method and apparatus for calibrating a phase array antenna in a communication system

[0001] The present disclosure relates to the control of signals in a mobile communication system, and specifically to a method and apparatus for the calibration of a phase array antenna.

[0002] In communication systems, the technology of using multiple antennas in transmitters or receivers to improve transmission quality can be referred to as multi-antenna technology. Improving transmission quality means increasing the maximum transmission speed per user, the overall capacity of a cell, or expanding cell coverage. The technology of using multiple antennas in transmitters and receivers can be referred to as Multiple Input Multiple Output (MIMO).

[0003] In wireless communication systems utilizing MIMO technology, multiple antennas can be used at both the transmitter and receiver. The channel capacity of wireless communication systems utilizing MIMO technology can be significantly improved compared to single-antenna technology. Both the base station and the terminal supporting MIMO use multiple antennas, and the channel capacity can be increased in proportion to the number of antennas used. For example, if the base station uses M antennas and the terminal uses N antennas, the average transmission capacity can increase by min(M, N).

[0004] In wireless communication, spatial multiplexing is based on MIMO technology, in which multiple data streams are transmitted simultaneously from multiple antennas using the same time / same frequency resources. 5G networks are introducing a technology called massive MIMO (mMIMO), which enables beamforming of each data stream using phased array antennas in the millimeter-wave (mmWave) band.

[0005] The information described above may be provided as related art for the purpose of aiding understanding of the present disclosure. No claim or determination is made as to whether any of the foregoing may be applied as prior art related to the present disclosure.

[0006] The present disclosure provides a method and apparatus for calibrating a plurality of radio frequency (RF) chains included in a phase array antenna.

[0007] In addition, the present disclosure provides a method and apparatus for reducing the time required to calibrate the RF chain of a phase array antenna.

[0008] In addition, the present disclosure provides a method and apparatus for calibrating each RF chain based on the difference in relative phase values ​​of each chain in a plurality of RF chains.

[0009] In addition, the present disclosure provides a method and apparatus for calibrating a plurality of RF chains based on a reference signal and a known phase value.

[0010] According to one embodiment, a method for calibrating a phase array antenna in a wireless communication system may include: a step of modulating a first signal generated from a first signal generator using a first phase set; a step of modulating a second signal generated from a second signal generator using a second phase set; a step of transmitting a third signal corresponding to the first signal and a fourth signal corresponding to the second signal through a plurality of RF chains included in the phase array antenna; and a step of calibrating at least one of the phase and gain of at least some of the plurality of RF chains using the third signal and the fourth signal.

[0011] According to one embodiment, an electronic device in a wireless communication system may include a transceiver; a memory; and at least one processor. The at least one processor may enable the electronic device to perform a plurality of operations by executing instructions stored in the memory. The plurality of operations may include: an operation of modulating a first signal generated from a first signal generator using a first phase set; an operation of modulating a second signal generated from a second signal generator using a second phase set; an operation of transmitting a third signal corresponding to the first signal and a fourth signal corresponding to the second signal through a plurality of RF chains included in a phase array antenna; and an operation of calibrating at least one of the phase and gain of at least some of the plurality of RF chains using the third signal and the fourth signal.

[0012] According to one embodiment, the storage medium may store at least one instruction that can be read by a computer. The at least one instruction may cause an electronic device to perform a plurality of operations when executed by at least one processor. The plurality of operations may include: an operation of modulating a first signal generated from a first signal generator using a first phase set; an operation of modulating a second signal generated from a second signal generator using a second phase set; an operation of transmitting a third signal corresponding to the first signal and a fourth signal corresponding to the second signal through a plurality of RF chains included in a phase array antenna; and an operation of calibrating at least one of the phase and gain of at least some of the plurality of RF chains using the third signal and the fourth signal.

[0013] A method and apparatus according to one embodiment of the present disclosure can reduce the time required for calibration by simultaneously calibrating a plurality of radio frequency (RF) chains included in a phase array antenna.

[0014] In relation to the description of the drawings, the same or similar reference numerals may be used for identical or similar components.

[0015] FIG. 1 is a block diagram of an electronic device in a network environment according to one embodiment of the present disclosure.

[0016] FIG. 2 is a block diagram illustrating the configuration of a calibration device with a 1T1R (1-transmitter and 1-receiver) structure.

[0017] FIG. 3 is a block diagram illustrating the configuration of a calibration device with a 2T2R (2-transmitter and 2-receiver) structure according to one embodiment of the present disclosure.

[0018] FIG. 4 is a drawing for explaining the operation of a calibration device of a 2T2R structure according to one embodiment of the present disclosure.

[0019] FIG. 5 is a block diagram illustrating the configuration of a device including a modem, a digital frontend (DFE) module, and an RF module according to one embodiment of the present disclosure.

[0020] FIG. 6 shows an example of a frame structure of 5G FR2 according to one embodiment of the present disclosure.

[0021] FIG. 7 shows an example of a frame structure of 5G FR2 according to one embodiment of the present disclosure.

[0022] FIG. 8a shows an example of a slot structure for a 5G FR2 signal according to one embodiment of the present disclosure.

[0023] FIG. 8b shows another example of a slot structure for a 5G FR2 signal according to one embodiment of the present disclosure.

[0024] FIG. 9 is a modulation code H according to one embodiment of the present disclosure. T Shows an example of applying.

[0025] FIG. 10a shows a calibration connection diagram according to one embodiment of the present disclosure.

[0026] FIG. 10b shows a clock tree diagram of a base station according to one embodiment of the present disclosure.

[0027] FIG. 11 shows an example of a slot structure for a modified signal according to one embodiment of the present disclosure.

[0028] Hereinafter, embodiments of the present disclosure are described in detail with reference to the drawings so that those skilled in the art can easily practice them. However, the present disclosure may be embodied in various different forms and is not limited to the embodiments described herein. In relation to the description of the drawings, the same or similar reference numerals may be used for identical or similar components. Furthermore, in the drawings and related descriptions, descriptions of well-known functions and configurations may be omitted for clarity and brevity.

[0029] The present disclosure describes embodiments using terms used in some communication standards (e.g., 3GPP (3rd Generation Partnership Project)), but this is merely illustrative. Various embodiments of the present disclosure can be easily modified and applied to other communication systems.

[0030] FIG. 1 is a block diagram of an electronic device (101) in a network environment (100) according to one embodiment of the present disclosure.

[0031] Referring to FIG. 1, in a network environment (100), an electronic device (101) may communicate with an electronic device (102) through a first network (198) (e.g., a short-range wireless communication network) or with at least one of an electronic device (104) or a server (108) through a second network (199) (e.g., a long-range wireless communication network). According to one embodiment, the electronic device (101) may communicate with the electronic device (104) through a server (108). According to one embodiment, the electronic device (101) may include a processor (120), memory (130), input module (150), sound output module (155), display module (160), audio module (170), sensor module (176), interface (177), connection terminal (178), haptic module (179), camera module (180), power management module (188), battery (189), communication module (190), subscriber identification module (196), or antenna module (197). In some embodiments, at least one of these components (e.g., connection terminal (178)) may be omitted from the electronic device (101), or one or more other components may be added. In some embodiments, some of these components (e.g., sensor module (176), camera module (180), or antenna module (197)) may be integrated into a single component (e.g., display module (160)).

[0032] The processor (120) can control at least one other component (e.g., hardware or software component) of the electronic device (101) connected to the processor (120) by executing software (e.g., program (140)), and can perform various data processing or operations. According to one embodiment, as at least part of the data processing or operations, the processor (120) can store commands or data received from other components (e.g., sensor module (176) or communication module (190)) in volatile memory (132), process the commands or data stored in volatile memory (132), and store the resulting data in non-volatile memory (134). According to one embodiment, the processor (120) may include a main processor (121) (e.g., central processing unit or application processor) or an auxiliary processor (123) that can operate independently or together with it (e.g., graphics processing unit, neural processing unit (NPU), image signal processor, sensor hub processor, or communication processor). For example, if the electronic device (101) includes a main processor (121) and an auxiliary processor (123), the auxiliary processor (123) may be configured to use lower power than the main processor (121) or to be specialized for a designated function. The auxiliary processor (123) may be implemented separately from the main processor (121) or as part thereof.

[0033] The auxiliary processor (123) may control at least some of the functions or states associated with at least one component of the electronic device (101) (e.g., display module (160), sensor module (176), or communication module (190)) on behalf of the main processor (121) while the main processor (121) is in an inactive (e.g., sleep) state, or together with the main processor (121) while the main processor (121) is in an active (e.g., application execution) state. According to one embodiment, the auxiliary processor (123) (e.g., image signal processor or communication processor) may be implemented as part of another functionally related component (e.g., camera module (180) or communication module (190)). According to one embodiment, the auxiliary processor (123) (e.g., neural network processing unit) may include a hardware structure specialized for processing an artificial intelligence model. The artificial intelligence model may be generated through machine learning. Such learning may be performed, for example, on the electronic device (101) itself where the artificial intelligence model is executed, or through a separate server (e.g., server (108)). The learning algorithm may include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above. The artificial intelligence model may include a plurality of artificial neural network layers.An artificial neural network may be a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), a deep Q-network, or a combination of two or more of the above, but is not limited to the examples described above. In addition to the hardware structure, the artificial intelligence model may include a software structure, either additionally or substantially.

[0034] The memory (130) can store various data used by at least one component of the electronic device (101) (e.g., processor (120) or sensor module (176)). The data may include, for example, input data or output data for software (e.g., program (140)) and related commands. The memory (130) may include volatile memory (132) or non-volatile memory (134).

[0035] The program (140) may be stored as software in memory (130) and may include, for example, an operating system (142), middleware (144), or an application (146).

[0036] The input module (150) can receive commands or data to be used for a component of the electronic device (101) (e.g., processor (120)) from outside the electronic device (101) (e.g., user). The input module (150) may include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

[0037] The sound output module (155) can output a sound signal to the outside of the electronic device (101). The sound output module (155) may include, for example, a speaker or a receiver. The speaker may be used for general purposes, such as multimedia playback or recording playback. The receiver may be used to receive incoming calls. According to one embodiment, the receiver may be implemented separately from the speaker or as part thereof.

[0038] The display module (160) can visually provide information to an external (e.g., user) of the electronic device (101). The display module (160) may include, for example, a display, a holographic device, or a projector and a control circuit for controlling said device. According to one embodiment, the display module (160) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of the force generated by said touch.

[0039] The audio module (170) can convert sound into an electrical signal or, conversely, convert an electrical signal into sound. According to one embodiment, the audio module (170) can acquire sound through the input module (150) or output sound through the sound output module (155) or an external electronic device (e.g., electronic device (102)) (e.g., speaker or headphones) connected directly or wirelessly to the electronic device (101).

[0040] The sensor module (176) can detect the operating state of the electronic device (101) (e.g., power or temperature) or the external environmental state (e.g., user state) and generate an electrical signal or data value corresponding to the detected state. According to one embodiment, the sensor module (176) may include, for example, a gesture sensor, a gyroscope sensor, a barometric pressure sensor, a magnetic sensor, an accelerometer sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biosensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0041] The interface (177) may support one or more specified protocols that can be used for the electronic device (101) to be connected directly or wirelessly to an external electronic device (e.g., electronic device (102)). According to one embodiment, the interface (177) may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

[0042] The connection terminal (178) may include a connector through which the electronic device (101) can be physically connected to an external electronic device (e.g., electronic device (102)). According to one embodiment, the connection terminal (178) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0043] The haptic module (179) can convert an electrical signal into a mechanical stimulus (e.g., vibration or movement) or an electrical stimulus that the user can perceive through tactile or kinesthetic senses. According to one embodiment, the haptic module (179) may include, for example, a motor, a piezoelectric element, or an electric stimulation device.

[0044] The camera module (180) can capture still images and video. According to one embodiment, the camera module (180) may include one or more lenses, image sensors, image signal processors, or flashes.

[0045] The power management module (188) can manage the power supplied to the electronic device (101). According to one embodiment, the power management module (188) can be implemented, for example, as at least part of a power management integrated circuit (PMIC).

[0046] The battery (189) can supply power to at least one component of the electronic device (101). According to one embodiment, the battery (189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0047] The communication module (190) can support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between an electronic device (101) and an external electronic device (e.g., electronic device (102), electronic device (104), or server (108)), and the performance of communication through the established communication channel. The communication module (190) may include one or more communication processors that operate independently of the processor (120) (e.g., application processor) and support direct (e.g., wired) communication or wireless communication. According to one embodiment, the communication module (190) may include a wireless communication module (192) (e.g., cellular communication module, short-range wireless communication module, or GNSS (global navigation satellite system) communication module) or a wired communication module (194) (e.g., LAN (local area network) communication module, or power line communication module). The corresponding communication module among these communication modules can communicate with an external electronic device (104) through a first network (198) (e.g., a short-range communication network such as Bluetooth, WiFi (wireless fidelity) direct, or IrDA (infrared data association)) or a second network (199) (e.g., a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)). These various types of communication modules may be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The wireless communication module (192) can identify or authenticate the electronic device (101) within a communication network such as the first network (198) or the second network (199) using subscriber information (e.g., International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module (196).

[0048] The wireless communication module (192) can support 5G networks and next-generation communication technologies following 4G networks, for example, new radio access technology. NR access technology can support high-speed transmission of high-capacity data (enhanced mobile broadband (eMBB)), minimization of terminal power and connection of multiple terminals (massive machine type communications (mMTC)), or high reliability and low latency (ultra-reliable and low-latency communications (URLLC)). The wireless communication module (192) can support a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate, for example. The wireless communication module (192) can support various technologies for securing performance in the high-frequency band, such as beamforming, massive MIMO (multiple-input and multiple-output), full-dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large-scale antenna. The wireless communication module (192) can support various requirements specified in the electronic device (101), external electronic device (e.g., electronic device (104)), or network system (e.g., second network (199)). According to one embodiment, the wireless communication module (192) can support a Peak data rate (e.g., 20 Gbps or more) for realizing eMBB, loss coverage (e.g., 164 dB or less) for realizing mMTC, or U-plane latency (e.g., downlink (DL) and uplink (UL) each 0.5 ms or less, or round trip 1 ms or less) for realizing URLLC.

[0049] An antenna module (197) can transmit a signal or power to or from an external source (e.g., an external electronic device). According to one embodiment, the antenna module (197) may include an antenna comprising a radiator made of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). According to one embodiment, the antenna module (197) may include a plurality of antennas (e.g., an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network, such as a first network (198) or a second network (199), may be selected from the plurality of antennas, for example, by a communication module (190). A signal or power may be transmitted or received between the communication module (190) and an external electronic device through the selected at least one antenna. According to some embodiments, in addition to the radiator, other components (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as part of the antenna module (197).

[0050] According to various embodiments, the antenna module (197) may form a mmWave antenna module. According to one embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent to a first surface (e.g., bottom surface) of the printed circuit board and capable of supporting a specified high frequency band (e.g., mmWave band), and a plurality of antennas (e.g., array antennas) disposed on or adjacent to a second surface (e.g., top surface or side surface) of the printed circuit board and capable of transmitting or receiving a signal of the specified high frequency band.

[0051] At least some of the above components can be connected to each other via a communication method between peripheral devices (e.g., bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)) and exchange signals (e.g., commands or data) with each other.

[0052] According to one embodiment, commands or data may be transmitted or received between the electronic device (101) and an external electronic device (104) through a server (108) connected to a second network (199). Each of the external electronic devices (102, or 104) may be the same or different type of device as the electronic device (101). According to one embodiment, all or part of the operations performed on the electronic device (101) may be performed on one or more of the external electronic devices (102, 104, or 108). For example, if the electronic device (101) needs to perform a function or service automatically or in response to a request from a user or another device, the electronic device (101) may request one or more external electronic devices to perform at least part of the function or service instead of performing the function or service itself or additionally. One or more external electronic devices that receive the above request may execute at least part of the requested function or service, or additional function or service related to the request, and transmit the result of the execution to the electronic device (101). The electronic device (101) may provide the result as is or additionally processed as at least part of the response to the request. For this purpose, for example, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used. The electronic device (101) may provide ultra-low latency services using, for example, distributed computing or mobile edge computing. In another embodiment, the external electronic device (104) may include an Internet of Things (IoT) device. The server (108) may be an intelligent server using machine learning and / or neural networks. According to one embodiment, the external electronic device (104) or the server (108) may be included within a second network (199).The electronic device (101) can be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.

[0053] The embodiments of this document and the terms used therein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of said embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of said items unless the relevant context clearly indicates otherwise. In this document, phrases such as "A or B," "at least one of A and B," "at least one of A or B," "A, B or C," "at least one of A, B and C," and "at least one of A, B, or C" each may include any one of the items listed together in the corresponding phrase, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used simply to distinguish said components from other said components and do not limit said components in any other aspect (e.g., importance or order). Where any (e.g., 1st) component is referred to as “coupled” or “connected” to another (e.g., 2nd) component, with or without the terms “functionally” or “communicationly,” it means that said any component may be connected to said other component directly (e.g., via a wire), wirelessly, or through a third component.

[0054] The term “module” as used in the embodiments of this document may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit, for example. A module may be a component formed integrally, or a minimum unit of said component or a part thereof that performs one or more functions. For example, according to one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0055] One embodiment of the present document may be implemented as software (e.g., program (140)) comprising one or more instructions stored in a storage medium (e.g., internal memory (136) or external memory (138)) readable by a machine (e.g., electronic device (101)). For example, a processor (e.g., processor (120)) of the machine (e.g., electronic device (101)) may call at least one of the one or more instructions stored in the storage medium and execute it. This enables the machine to be operated to perform at least one function according to the at least one called instruction. The one or more instructions may include code generated by a compiler or code that can be executed by an interpreter. The storage medium readable by the machine may be provided in the form of a non-transitory storage medium. Here, 'non-temporary' simply means that the storage medium is a tangible device and does not contain a signal (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently and cases where it is stored temporarily.

[0056] FIG. 2 is a block diagram illustrating the configuration of a calibration device with a 1T1R (1-transmitter and 1-receiver) structure.

[0057] In FIG. 2, the calibration device (200) has a 1T1R structure and can calibrate a phased array antenna (250). Referring to FIG. 2, the calibration device (200) may include at least one of a control unit (210), a signal generator (220), a receiving antenna (230), a measuring instrument (240), and a phased array antenna (250).

[0058] The phase array antenna (250) may include a plurality of phase converters (251-1 to 251-N) and RF chains (chain 1 to chain N, where N is a natural number greater than or equal to 2) comprising a plurality of antennas. The phase array antenna (250) may control the phase differently for each of the plurality of antennas and then adjust the steering angle using interference. According to one embodiment, the calibration device (200) may be implemented by being included in an electronic device (e.g., the electronic device (101) of FIG. 1). For example, the calibration device (200) may be implemented within a base station and / or user equipment (UE).

[0059] The control unit (210) can control the overall operations of the calibration device (200). The control unit (210) may include at least one processor (or microprocessor) or be part of at least one processor.

[0060] The control unit (210) can set and / or change the phase value of each of the plurality of phase converters (251-1 to 251-N). The control unit (210) can set and / or change the phase value of each of the RF chains (chain 1 to chain N) by setting and / or changing the phase value of each of the plurality of phase converters (251-1 to 251-N).

[0061] The control unit (210) can set the phase value of each of the RF chains (chain 1 to chain N) and control the transmission of a signal in which the initial phase is corrected in correspondence with the set phase value. The control unit (210) can control the on / off state of each of the plurality of phase converters (251-1 to 251-N). The control unit (210) can control the on / off state of each of the RF chains (chain 1 to chain N, where N is a natural number greater than or equal to 2).

[0062] The control unit (210) can measure the power of a signal transmitted from the phase array antenna (250). The control unit (210) can measure the power of a signal transmitted from each of the RF chains (chain 1 to chain N) from the phase array antenna (250), and can measure the power of a combined signal of signals transmitted from two or more RF chains.

[0063] The signal generator (220) can generate an initial input signal for calibrating the phase array antenna (250). The signal generator (220) can provide the generated initial input signal to the phase array antenna (250) to allow signals to be transmitted from the RF chains in the ON state of the phase array antenna (250). The signal generator (220) can generate a signal for calibrating at least one phase among the RF chains (chain 1 to chain N) of the phase array antenna (250) under the control of the control unit (210). According to one embodiment, the signal generator (220) may be configured as a transceiver. In this case, the phase array antenna (250) may be configured to selectively operate in a transmission mode or a reception mode.

[0064] For example, in the case of four elements (4 elements) connected to the signal generator (220), the first signal x can be transmitted to each RF chain (chain 1 to chain N). For example, the phase of the first signal x can be modulated by matrix H. For example, in the case of four elements, the matrix H can be implemented as a 4x4 matrix such as Equation 1.

[0065] [Mathematical Formula 1]

[0066]

[0067] The modulated signal is a T1 ~a T4 It can be amplified with a complex gain and received as a combined signal y at the receiving antenna (230). For example, since the matrix H is a 4x4 matrix, four signals (y1~y4) such as Equation 2 can be received at the receiving antenna (230).

[0068] [Mathematical Formula 2]

[0069]

[0070] Based on the four linear equations listed in the above mathematical formula 2, the unknown value A T can be obtained ( ).

[0071] Here, A T The magnitude of corresponds to the gain of each element, and A T The angle can correspond to the phase of each element. Therefore, all elements are A based on Equation 3. T It can be confirmed by obtaining.

[0072] [Mathematical Formula 3]

[0073]

[0074] The receiving antenna (230) can receive a signal transmitted from the radiating element of the phase array antenna (250).

[0075] The measuring instrument (240) can analyze a signal received through the receiving antenna (230). The measuring instrument (240) may include at least one processor (or microprocessor) or be part of at least one processor. The measuring instrument (240) may communicate (or connect) with the control unit (210) via wired or wireless means. The measuring instrument (240) may also be configured to be included in a part of the control unit (210).

[0076] The measuring instrument (240) can receive a signal through the receiving antenna (230). The measuring instrument (240) can receive a signal transmitted from the phase array antenna (250) and can analyze the spectrum of the received signal. The measuring instrument (240) can measure the power of the signal transmitted from the phase array antenna (250). According to one embodiment, the measuring instrument (240) can measure the power of a combined signal of signals transmitted from two or more RF chains.

[0077] According to one embodiment, the calibration device (200) determines a reference phase value to calibrate RF chains (chain 1 to chain N) and can calibrate RF chains (chain 1 to chain N) using the reference phase value. For example, the calibration device (200) transmits a signal (hereinafter, a test signal) while changing the phase value of the RF chains (chain 1 to chain N), and a measuring instrument (240) that receives the test signal through a receiving antenna (230) can determine the phase difference of the RF chains (chain 1 to chain N) using the received test signal.

[0078] The measuring instrument (240) can determine the phase difference of the RF chains (chain 1 to chain N) based on the phase sets included in the received test signal. The measuring instrument (240) can determine a phase control value for calibrating the RF chains (chain 1 to chain N) based on the phase difference and reference phase value determined for each of the RF chains (chain 1 to chain N).

[0079] According to one embodiment, the calibration device (200) can select a reference RF chain among the RF chains (chain 1 to chain N) and calibrate the RF chains (chain 1 to chain N) using the reference RF chain. The measuring instrument (240) can determine one of the RF chains (chain 1 to chain N) as the reference RF chain and determine a phase control value for calibrating the remaining RF chains to the phase of the reference RF chain.

[0080] The calibration device (200) can determine a phase control value such that the gain relative to the phase of each RF chain (chain 1 to chain N) identified from the received test signal is maximized. According to one embodiment, the calibration device (200) can determine a phase control value for each RF chain (chain 1 to chain N) such that the gain of the phase array antenna (250) including the RF chains (chain 1 to chain N) is maximized. According to one embodiment, the calibration device (200) can determine a phase control value for each RF chain (chain 1 to chain N) such that the gain of the phase array antenna (250) including the RF chains (chain 1 to chain N) meets the set conditions.

[0081] The present disclosure proposes a calibration device with a 2T2R (2-transmitter and 2-receiver) structure for calibrating a phase array antenna implemented in an electronic device. The present disclosure proposes a technique for calibrating a target RF chain more quickly by utilizing the phase difference between the phase of a reference signal transmitted from a radio frequency (RF) chain and the phase of a signal transmitted from a target RF chain.

[0082] FIG. 3 is a block diagram illustrating the configuration of a calibration device with a 2T2R (2-transmitter and 2-receiver) structure according to one embodiment of the present disclosure.

[0083] FIG. 3 illustrates a case where the calibration device (300) has a 2T2R structure for convenience of explanation, but the technical concept of the present disclosure is not limited thereto. According to one embodiment, the calibration device (300) may be implemented as a 3T structure (or 3T3R structure) including three signal generators. According to one embodiment, the calibration device (300) may be implemented as a 4T structure (or 4T4R structure) including four signal generators. According to one embodiment, the calibration device (300) may be implemented as an NT structure (or NT NR structure) including N signal generators (where N is a natural number satisfying N≥5).

[0084] In FIG. 3, the calibration device (300) has a 2T2R structure and can calibrate a plurality of phase array antennas (350, 355). Referring to FIG. 3, the calibration device (300) may include at least one of a control unit (310), a first signal generator (320), a second signal generator (325), a receiving antenna (330), a measuring instrument (340), a first phase array antenna (350), and a second phase array antenna (355).

[0085] Each of the first phase array antenna (350) and the second phase array antenna (355) may include RF chains (chain 1 to chain N) comprising a plurality of phase converters and a plurality of antennas. Each of the first phase array antenna (350) and the second phase array antenna (355) may control the phase differently for each of the plurality of antennas and then adjust the steering angle using interference. According to one embodiment, the signal transmitted through the first phase array antenna (350) may be a V-polarized signal, and the signal transmitted through the second phase array antenna (355) may be an H-polarized signal. According to one embodiment, the calibration device (300) may be implemented by being included in an electronic device (e.g., the electronic device (101) of FIG. 1). For example, the calibration device (300) may be implemented within a base station and / or user equipment (UE).

[0086] The control unit (310) can control the overall operations of the calibration device (300). The control unit (310) may include at least one processor (or microprocessor) or be part of at least one processor.

[0087] The control unit (310) can set and / or change the phase value for each of the plurality of phase converters (or for at least one) including the first phase array antenna (350) and the second phase array antenna (355). The control unit (310) can set and / or change the phase value for each of the RF chains (chain 1 to chain N) including the first phase array antenna (350) and the second phase array antenna (355) by setting and / or changing the phase value for each of the plurality of phase converters (or for at least one).

[0088] The control unit (310) can set the phase value of each RF chain (chain 1 to chain N) and control the transmission of a signal in which the initial phase is corrected in correspondence with the set phase value. The control unit (310) can control the on / off state of each of the plurality of phase converters. The control unit (310) can control the on / off state of each RF chain (chain 1 to chain N, where N is a natural number greater than or equal to 2).

[0089] The control unit (310) can measure the power of a signal transmitted from at least one of the first phase array antenna (350) and the second phase array antenna (355). The control unit (210) can measure the power of a signal transmitted from each of the RF chains (chain 1 to chain N) at the phase array antenna (350 and / or 355), and can measure the power of a combined signal of signals transmitted from two or more RF chains.

[0090] The first signal generator (320) can generate an initial input signal for calibrating the first phase array antenna (350). The first signal generator (320) can provide the generated initial input signal to the first phase array antenna (350) so that signals are transmitted from the RF chains in the ON state of the first phase array antenna (350). The first signal generator (320) can generate a signal for calibrating at least one phase among the RF chains (chain 1 to chain N) of the first phase array antenna (350) under the control of the control unit (310).

[0091] The second signal generator (325) can generate an initial input signal for calibrating the second phase array antenna (355). The second signal generator (325) can provide the generated initial input signal to the second phase array antenna (355) so that signals are transmitted from the RF chains in the ON state of the second phase array antenna (355). The second signal generator (325) can generate a signal for calibrating at least one phase among the RF chains (chain 1 to chain N) of the second phase array antenna (355) under the control of the control unit (310).

[0092] The receiving antenna (330) can receive a signal transmitted from at least one radiating element of the first phase array antenna (350) and / or the second phase array antenna (355). According to one embodiment, the receiving antenna (330) may be implemented as a cross-polarization antenna.

[0093] The measuring instrument (340) can analyze a signal received through the receiving antenna (230). The measuring instrument (340) may include at least one processor (or microprocessor) or be part of at least one processor. The measuring instrument (340) may communicate (or be connected) with the control unit (310) via wired or wireless means. The measuring instrument (340) may also be configured to be included in a part of the control unit (310).

[0094] The measuring instrument (340) can receive a signal through the receiving antenna (330). The measuring instrument (340) can receive a signal transmitted from at least one phase array antenna (350 and / or 355) and can analyze the spectrum of the received signal. The measuring instrument (240) can measure the power of the signal transmitted from at least one phase array antenna (350 and / or 355). According to one embodiment, the measuring instrument (240) can measure the power of a combined signal of signals transmitted from two or more RF chains.

[0095] FIG. 4 is a drawing for explaining the operation of a calibration device of a 2T structure according to one embodiment of the present disclosure.

[0096] FIG. 4 illustrates a case where the calibration device (400) has a 2T2R structure for convenience of explanation, but the technical concept of the present disclosure is not limited thereto. According to one embodiment, the calibration device (400) may be implemented as a 3T structure (or 3T3R structure) including three signal generators. According to one embodiment, the calibration device (400) may be implemented as a 4T structure (or 4T4R structure) including four signal generators. According to one embodiment, the calibration device (400) may be implemented as an NT structure (or NT NR structure) including N signal generators (where N is a natural number satisfying N≥5).

[0097] Referring to FIG. 4, the calibration device (400) may include at least one of a control unit (410), a first signal generator (420) that generates a first signal (x1), a second signal generator (425) that generates a second signal (x2), a receiving antenna (430) that receives a received signal (y), a receiver (440) that separates signals through calculation, a first phase array antenna (450) in which modulation using a first phase set (H1) is performed, and a second phase array antenna (455) in which modulation using a second phase set (H2) is performed. Each of the first phase array antenna (450) and the second phase array antenna (455) may include RF chains (chain 1 to chain N) comprising a plurality of phase converters and a plurality of antennas.

[0098] According to one embodiment, the receiving antenna (430) may be implemented as a cross-pol horn antenna. According to one embodiment, the first phase set (H1) and the second phase set (H2) may be different from each other. According to one embodiment, the first phase set (H1) may be the same as the second phase set (H2).

[0099] According to one embodiment, the calibration device (400) may be included in a 2-stream beamforming system (e.g., a 5G base station) having a plurality of antennas, a power amplifier (PA), and a phase shifter (PS). According to one embodiment, the calibration device (400) may generate a directional beam by electrically precoding the phase shifter.

[0100] In FIG. 4, the phases of the transmitted signals x1 and x2, respectively, are modulated using phase-modulation codes H1 and H2, respectively, and can be radiated from the antenna elements of each RF chain. The antenna polarization of the streams may differ. The signals can be received and combined at an external antenna (e.g., a cross-polarization antenna or a circular polarization antenna).

[0101] The signal y received by the receiving antenna (430) can be expressed as in Equation 4.

[0102] [Mathematical Formula 4]

[0103]

[0104] The received signal y is H T Modulated x1 and H using T x2 modulated using [this] can be a mixed signal. Signals x1 and x2 can be (partially) orthogonal to each other. Each signal can be separated as long as the code gain is sufficient. The separated signals can be expressed as in Equation 5.

[0105] [Mathematical Formula 5]

[0106]

[0107] FIG. 5 is a block diagram illustrating the configuration of a device including a modem, a digital frontend (DFE) module, and an RF module according to one embodiment of the present disclosure.

[0108] Referring to FIG. 5, the electronic device (500) may include a modem (510), a DFE module (520), an RF module (530), and antennas (540, 545).

[0109] A modem (510) may be a device that modulates a signal to transmit information (mainly digital information) and demodulates it to restore the original signal at the receiving end.

[0110] The DFE module (520) may be part of a transceiver that implements front-end functions such as frequency conversion and channel filtering. The DFE module (520) may include a memory (MEM), a plurality of multiplexers, and a plurality of numerically controlled oscillators (NCOs). An output signal x stored in the memory (MEM) within the DFE module (520) may be transmitted to the multiplexers within the DFE module (520), and signals x1 and / or x2 from the modem (510) may be transmitted to the multiplexers within the DFE module (520). In FIG. 5, for the sake of example of description, the output signals transmitted from the memory (MEM) to different multiplexers are shown as the same signal (all x), but depending on the implementation, the memory (MEM) may output distinct signals (e.g., x and x') to different multiplexers.

[0111] The first output signal of the DFE module (520) can be processed by first polarization (A-pol) in the RF module (530) and transmitted to the first antenna (hornAnt) (540). The second output signal of the DFE module (520) can be processed by second polarization (B-pol) in the RF module (530) and transmitted to the second antenna (hornAnt) (545).

[0112] Meanwhile, 5G FR (Frequency Range) can be broadly divided into FR1 (Frequency Range 1) and FR2 (Frequency Range 2). The above FR1 may be within the range of 410 to 7125 MHz (band below 6 GHz), and the above FR2 may be within the range of 24.25 to 52.6 GHz (mmWave band with strong directivity).

[0113] FIG. 6 illustrates an example of a frame structure of 5G FR2 according to an embodiment of the present disclosure. Referring to FIG. 6, a single wireless frame of 5G FR2 may consist of 66 resource blocks (RBs) and 80 slots. In FIG. 6, the first area may be an area allocated for a downlink channel, and the second area may be an area allocated for an uplink channel and guard time.

[0114] FIG. 7 illustrates an example of a frame structure of 5G FR2 according to an embodiment of the present disclosure. Referring to FIG. 7, one RB within one radio frame of 5G FR2 may be composed of 12 subcarriers, and one slot may be composed of 14 symbols (e.g., 730 is the area of ​​1 RB x 1 slot). In FIG. 7, the first area may be the area allocated for a shared channel (data), the second area may be the area allocated for a DMRS (Demodulation Reference Signal), and the third area may be the area allocated for a PTRS (phase-noise tracking reference signal).

[0115] The device according to an embodiment of the present disclosure can characterize a phase array using PTRS and detect an accurate time-domain position using DMRS. In FIG. 7, PTRS may exist once every four symbols, and to reduce measurement time, PTRS may be placed at every symbol. The time-density of PTRS can be adjusted by changing the parameters defined for PTRS in Section 5.1.6.3 of 3GPP TS 38.214 (Table 1). Table 1 may show the time-density of PTRS defined based on a function of a scheduled Modulation Coding Scheme (MCS).

[0116] [Table 1]

[0117]

[0118] Referring to Table 1, for example, the time-density of PTRS can be changed from 4 to 1 depending on the value of the scheduled MCS.

[0119] Table 2 shows the frequency-density of PTRS defined based on a function of scheduled bandwidth.

[0120] [Table 2]

[0121]

[0122] The DMRS (DeModulation Reference Signal) is a reference signal used for channel estimation and can be used to decode the PDSCH (Physical Data Shared Channel). When performing channel estimation using DMRS, the DMRS resource allocated to perform channel estimation for a single layer can be referred to as a DMRS port.

[0123] FIG. 8a illustrates an example of a slot structure for a 5G FR2 signal according to an embodiment of the present disclosure. An example of a slot structure for a 5G FR2 signal is illustrated when DMRS port=0. The x1 signal illustrated in FIG. 4 can be implemented as a signal having the slot structure illustrated in FIG. 8a. In FIG. 8a, the first region may be an area allocated for a shared channel (data), the second region may be an area allocated for DMRS, and the third region may be an area allocated for PTRS.

[0124] FIG. 8b illustrates another example of a slot structure for a 5G FR2 signal according to one embodiment of the present disclosure. An example of a slot structure for a 5G FR2 signal is illustrated when DMRS port=1. The x2 signal illustrated in FIG. 4 can be implemented as a signal having the slot structure illustrated in FIG. 8b. In FIG. 8b, the first region may be an area allocated for a shared channel (data), the second region may be an area allocated for DMRS, and the third region may be an area allocated for PTRS.

[0125] The DMRS ports defined in Section 7.3.1.2 of the standard document 3GPP TS 38.212 can be defined as shown in Table 3. Table 3 shows the DMRS ports defined when dmrs-Type=1 and antenna port(s) (1000+ DMRS ports).

[0126] [Table 3]

[0127]

[0128] FIG. 9 is a modulation code H according to one embodiment of the present disclosure. T Shows an example of applying.

[0129] The x1 signal shown in FIG. 9 can be implemented as a 5G FR2 signal having a slot structure shown in FIG. 8a, and the x2 signal shown in FIG. 9 can be implemented as a 5G FR2 signal having a slot structure shown in FIG. 8b. The x1 signal shown in FIG. 9 can be used as the x1 signal of FIG. 4, and the x2 signal shown in FIG. 9 can be used as the x2 signal of FIG. 4.

[0130] As an example of a 4-element, 2-stream case, signals x1 / x2 are phase modulation codes (H1= H2= H) shown in FIG. 9. T It is modulated by ) and can be radiated from the antenna elements of each chain. Phase modulation code (H1= H2= H T) can be implemented as a 4x4 matrix as shown in Equation 6 for 4 chains (chain 1 to chain 4).

[0131] [Mathematical Formula 6]

[0132]

[0133] The signals can be received and combined by an external antenna (e.g., a cross-polarization antenna or a circular polarization antenna). The signal y received at the receiver can be expressed as in Equation 7.

[0134] [Mathematical Formula 7]

[0135]

[0136] The received signal y above is H T x1 and H modulated as T It may be a mixed signal of x2 modulated by . The timing of the received signal y can be obtained using DMRS (known signal). The subcarrier of each symbol can be separated into the frequency domain using FFT (Fast Fourier Transform).

[0137] The received phase and amplitude of the PTRS can be estimated using cross-correlation. The phase and amplitude of the PTRS at the location of signal x1 can be used as y1, and the phase and amplitude of the PTRS at the location of signal x2 can be used as y2. As shown in Equation 8, A at y1 and y2 T1 Department A T2 You can characterize the element by obtaining it.

[0138] [Mathematical Formula 8]

[0139]

[0140] FIG. 10a shows a calibration connection diagram according to one embodiment of the present disclosure.

[0141] Phase synchronization between the base station (BS) and the signal analyzer (SA) can be performed by connecting an external 10 MHz reference signal between the calibration-dedicated baseband unit and the SA. Frequency synchronization between the BS and the SA can be performed using Global Positioning System (GPS) signals. The BS can integrate the antenna, RF, and modem, as well as wireless link control, into a single unit.

[0142] The BS can ensure high-frequency accuracy by including an integrated GPSDO (GPS Disciplined Oscillator). An external GPSDO can be implemented for the SA to match the frequency with the BS. Frequency alignment is performed using a narrow loop BW (<200 Hz), and phase drift may occur in the millisecond range.

[0143] BS includes a phased array and transmits a 28GHz signal, and a receiving antenna (Horn antenna) connected to SA can receive the 28GHz signal within an RF anechoic chamber.

[0144] FIG. 10b shows a clock tree diagram of a base station according to one embodiment of the present disclosure.

[0145] Referring to FIG. 10b, the base station (BS) may include an analog and RF block (Analog / RF), a modem, and a GPSDO.

[0146] In FIG. 10b, there may be six stepped phase-locked loops (PLLs). PLL1 (10 MHz) can provide a frequency reference from a GPS signal. PLL2 (30.72 MHz) and PLL3 (n*30.72 MHz) can provide a clock for the modem. PLL4 (122.88 MHz) and PLL5 (1966.08 MHz) can provide a clock for the analog and RF block (Analog / RF).

[0147] PLL6 (5.6 GHz) can be the local oscillator (LO) of the RF chipset. PLL4 (122.88 MHz) can suppress higher offset frequency phase noise that can accumulate in digital blocks while maintaining frequency accuracy by using a narrow loop bandwidth (<200 Hz). The voltage-controlled crystal oscillator used in PLL4 (122.88 MHz) can dominate phase noise at low intermediate offset frequencies that contribute to phase drift on the order of milliseconds.

[0148] The voltage-controlled oscillator of PLL6 (5.6 GHz) can dominate phase noise at high offset frequencies that affect the magnitude of the error vector.

[0149] Meanwhile, two known signals at different times may be used to track the phase. In the case of the four elements in Fig. 9, the 1st PTRS, 5th PTRS, 9th PTRS, etc. are the same H TIt can be modulated by a combination of, and phase tracking can be performed with such PTRS. In this case, the required measurement duration may be 5 symbols. However, in the configuration of FIG. 9, the actual time required may be 15 symbols because DMRS is required for timing recovery.

[0150] In the time domain, the number of DMRS can be increased based on the dmrs-AdditionalPosition parameter as shown in Table 4. Table 4 is a table regarding DMRS positions defined in Section 7.4.1.1 of 3GPP TS 38.211.

[0151] [Table 4]

[0152]

[0153] To improve the signal-to-noise ratio (SNR) of the DMRS, the DMRS port option listed in Table 5 and the DMRS power boosting listed in Table 6 can be used.

[0154] [Table 5]

[0155]

[0156] [Table 6]

[0157]

[0158] Power amplification of the PTRS and power drop of the shared channel (data) can also be used to improve the SNR of the PTRS. An example of a modified signal configuration is shown in FIG. 11, and the minimum measurement period required for this configuration can be 6 symbols.

[0159] FIG. 11 illustrates an example of a slot structure for a modified signal according to one embodiment of the present disclosure. In FIG. 11, the first region is a region allocated for a shared channel (data), the second region is a region allocated for DMRS, the third region is a region allocated for PTRS, and the fourth region may be a no subcarrier region. In FIG. 11, DMRS additional position=3 and Number of DMRS CDM groups without data=2 may be set. DMRS port=0 may be set for the x1 signal and DMRS port=2 may be set for the x2 signal.

[0160] According to one embodiment, a method for calibrating a phase array antenna in a wireless communication system may include: a step of modulating a first signal generated from a first signal generator using a first phase set; a step of modulating a second signal generated from a second signal generator using a second phase set; a step of simultaneously transmitting a third signal corresponding to the first signal and a fourth signal corresponding to the second signal through a plurality of RF chains included in the phase array antenna; and a step of calibrating at least one of the phase and gain of at least some of the plurality of RF chains using the third signal and the fourth signal.

[0161] According to one embodiment, the first signal and the second signal may be at least partially orthogonal to each other. According to one embodiment, each of the first signal and the second signal may be generated by modifying a 5G FR2 (frequency range 2) signal. According to one embodiment, the first frequency range to which the phase-noise tracking reference signal (PTRS) in the first signal is assigned may be different from the second frequency range to which the PTRS in the second signal is assigned.

[0162] According to one embodiment, the method for calibration may further include the step of acquiring a fifth signal, which is a mixture of the third signal and the fourth signal, using an antenna capable of receiving a mixed signal of dual polarization; and the step of extracting a portion of the third signal and a portion of the fourth signal using an orthogonal portion of the first signal and the second signal.

[0163] According to one embodiment, the method for calibration may further include: determining the phase difference of each of the first RF chains for a first stream from the fifth signal; determining the phase difference of each of the second RF chains for a second stream from the fifth signal; and correcting the phase of at least some of the first RF chains and the second RF chains based on the phase difference of each of the first RF chains and the phase difference of each of the second RF chains.

[0164] According to one embodiment, the method for calibration may further include the step of calibrating the phase of at least some of the plurality of phase converters included in the phase array antenna using the third signal and the fourth signal.

[0165] According to one embodiment, the phase array antenna may be implemented within a base station or user equipment (UE).

[0166] According to one embodiment, an electronic device in a wireless communication system may include a transceiver; a memory; and at least one processor. The at least one processor may enable the electronic device to perform a plurality of operations by executing instructions stored in the memory. The plurality of operations may include: an operation of modulating a first signal generated from a first signal generator using a first phase set; an operation of modulating a second signal generated from a second signal generator using a second phase set; an operation of simultaneously transmitting a third signal corresponding to the first signal and a fourth signal corresponding to the second signal through a plurality of RF chains included in a phase array antenna; and an operation of calibrating at least one of the phase and gain of at least some of the plurality of RF chains using the third signal and the fourth signal.

[0167] According to one embodiment, the storage medium may store at least one instruction that can be read by a computer. The at least one instruction may cause an electronic device to perform a plurality of operations when executed by at least one processor. The plurality of operations may include: an operation of modulating a first signal generated from a first signal generator using a first phase set; an operation of modulating a second signal generated from a second signal generator using a second phase set; an operation of simultaneously transmitting a third signal corresponding to the first signal and a fourth signal corresponding to the second signal through a plurality of RF chains included in a phase array antenna; and an operation of calibrating at least one of the phase and gain of at least some of the plurality of RF chains using the third signal and the fourth signal.

[0168] According to one embodiment, the method according to the embodiments disclosed herein may be provided by being included in a computer program product. The computer program product may be traded between a seller and a buyer as a product. The computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read-only memory (CD-ROM)), or distributed online (e.g., download or upload) through an application store (e.g., Play Store™) or directly between two user devices (e.g., smartphones). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily created on a device-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.

[0169] According to one embodiment, each component (e.g., module or program) of the components described above may include a singular or multiple entities, and some of the multiple entities may be separated and placed in other components. According to one embodiment, one or more of the components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Generally or additionally, multiple components (e.g., module or program) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the multiple components in the same or similar manner as those performed by the corresponding component among the multiple components prior to integration. According to one embodiment, operations performed by the module, program, or other components may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

Claims

1. A method for calibrating a phase array antenna in a wireless communication system, A step of modulating a first signal generated from a first signal generator using a first phase set; A step of modulating a second signal generated from a second signal generator using a second phase set; A step of simultaneously transmitting a third signal corresponding to the first signal and a fourth signal corresponding to the second signal through a plurality of RF chains included in the phase array antenna; and A method characterized by including the step of calibrating at least one of the phase and gain of at least some of the plurality of RF chains using the third signal and the fourth signal.

2. In Paragraph 1, A method characterized in that at least a portion of the first signal and the second signal are orthogonal to each other.

3. In Paragraph 1, Each of the above first signal and the above second signal is generated by modifying a 5G FR2 (frequency range 2) signal, and A method characterized in that the first frequency range to which the phase-noise tracking reference signal (PTRS) in the first signal is assigned is different from the second frequency range to which the PTRS in the second signal is assigned.

4. In Paragraph 1, A step of acquiring a fifth signal, which is a mixture of the third signal and the fourth signal, using an antenna capable of receiving dual polarization as a mixed signal; and A method characterized by further including the step of extracting a portion of the third signal and a portion of the fourth signal using the orthogonal portions of the first signal and the second signal.

5. In Paragraph 4, A step of determining the phase difference of each of the first RF chains for the first stream from the fifth signal; A step of determining the phase difference of each of the second RF chains for the second stream from the fifth signal; and A method characterized by further including the step of correcting the phase of at least some of the first RF chains and the second RF chains based on the phase difference of each of the first RF chains and the phase difference of each of the second RF chains.

6. In Paragraph 1, A method characterized by including the step of calibrating the phase of at least some of the plurality of phase converters included in the phase array antenna using the third signal and the fourth signal.

7. In Paragraph 1, A method characterized in that the above-mentioned phase array antenna is implemented within a base station or UE (user equipment).

8. In an electronic device in a wireless communication system, transceiver; Memory; and It includes at least one processor, The above at least one processor enables the electronic device to perform a plurality of operations by executing instructions stored in the memory, and The above plurality of operations are, An operation of modulating a first signal generated from a first signal generator using a first phase set; The operation of modulating a second signal generated from a second signal generator using a second phase set; The operation of simultaneously transmitting a third signal corresponding to the first signal and a fourth signal corresponding to the second signal through a plurality of RF chains included in a phase array antenna; and A device characterized by including an operation to calibrate at least one of the phase and gain of at least some of the plurality of RF chains using the third signal and the fourth signal.

9. In Paragraph 8, A device characterized in that at least a portion of the first signal and the second signal are orthogonal to each other.

10. In Paragraph 8, Each of the above first signal and the above second signal is generated by modifying a 5G FR2 (frequency range 2) signal, and A device characterized in that the first frequency range to which the phase-noise tracking reference signal (PTRS) in the first signal is assigned is different from the second frequency range to which the PTRS in the second signal is assigned.

11. In paragraph 8, the plurality of operations are, The operation of acquiring a fifth signal, which is a mixture of the third signal and the fourth signal, using an antenna capable of receiving dual polarization as a mixed signal; and A device characterized by further including an operation of extracting a portion of the third signal and a portion of the fourth signal using the orthogonal portions of the first signal and the second signal.

12. In Clause 11, the plurality of operations are, An operation to determine the phase difference of each of the first RF chains for the first stream from the above fifth signal; An operation to determine the phase difference of each of the second RF chains for the second stream from the fifth signal; and A device characterized by further including an operation to correct the phase of at least some of the first RF chains and the second RF chains based on the phase difference of each of the first RF chains and the phase difference of each of the second RF chains.

13. In paragraph 8, the plurality of operations are, A device characterized by further including an operation to calibrate the phase of at least some of the plurality of phase converters included in the phase array antenna using the third signal and the fourth signal.

14. In Paragraph 8, A device characterized in that the above-mentioned phase array antenna is implemented within a base station or UE (user equipment).

15. In a storage medium storing at least one instruction readable by a computer, The above at least one instruction causes an electronic device to perform a plurality of operations when executed by at least one processor, and The above plurality of operations are, An operation of modulating a first signal generated from a first signal generator using a first phase set; The operation of modulating a second signal generated from a second signal generator using a second phase set; The operation of simultaneously transmitting a third signal corresponding to the first signal and a fourth signal corresponding to the second signal through a plurality of RF chains included in a phase array antenna; and A storage medium characterized by including an operation to calibrate at least one of the phase and gain for at least some of the plurality of RF chains using the third signal and the fourth signal.

Images