BEAMFORMING METHOD AND DEVICE IN WIRELESS COMMUNICATION SYSTEM

    公开(公告)号:US20230299825A1

    公开(公告)日:2023-09-21

    申请号:US18013865

    申请日:2020-07-09

    CPC classification number: H04B7/0617 H01Q3/40

    Abstract: According to an embodiment of the present disclosure, a beamforming method performed by a wireless device having an array antenna in a wireless communication system comprises the steps of: calculating a phase related to a target beamforming direction; determining antenna patterns related to the target beamforming direction from among antenna patterns preconfigured in relation to beamforming; and applying, to the array antenna, an antenna pattern based on the phase from among the antenna patterns related to the target beamforming direction. Each antenna included in the array antenna includes multiple feeding points and a variable reactance element connected to at least one feeding point among the multiple feeding points. The antenna pattern is related to at least one of i) a selection of at least one feeding point among the multiple feeding points and ii) a reactance value of the variable reactance element.

    METHOD AND DEVICE FOR MULTI-WAVELENGTH PLUG-AND-PLAY QUANTUM KEY DISTRIBUTION WITHOUT TIME DELAY DUE TO WAVELENGTH CONVERSION

    公开(公告)号:US20230283384A1

    公开(公告)日:2023-09-07

    申请号:US18003955

    申请日:2020-07-02

    CPC classification number: H04B10/70

    Abstract: The present specification provides a method and a device, the method, performed by a device, for transmitting a first pulse train in a quantum communication system being characterized by: receiving a random access (RA) preamble from another device; transmitting an RA response (RAR) to the other device as a response to the RA preamble; performing a radio resource control (RRC) connection process with the other device; receiving data from the other device; and decoding the data on the basis of key information, wherein a first pulse train is generated in a laser diode of the device, and the key information is determined on the basis that the first pulse train passes through both a first path and a second path and is then transmitted from the device to the other device via a quantum channel.

    SIGNAL TRANSMISSION AND RECEPTION METHOD AND DEVICE IN WIRELESS COMMUNICATION SYSTEM

    公开(公告)号:US20220077927A1

    公开(公告)日:2022-03-10

    申请号:US17424480

    申请日:2020-01-28

    Abstract: Disclosed are a signal transmission and reception method and device in a wireless communication system. A method for receiving a signal by a terminal in a wireless communication system according to an embodiment of the present specification comprises the steps of: receiving configuration relating to a signal which is down-converted in frequency on the basis of an O/E converter; and receiving the signal in a particular resource region on the basis of the configuration. A frequency domain of the particular resource region comprises a plurality of chunks. The chunks comprise at least one component carrier (CC). The configuration comprises information indicating a main chunk relating to differential phase shift keying (DPSK). The transmission of the signal is on the basis of the DPSK applied between the chunks in the frequency domain with respect to the main chunk.

    METHOD FOR TRANSMITTING OR RECEIVING SIGNAL IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR

    公开(公告)号:US20210281455A1

    公开(公告)日:2021-09-09

    申请号:US16334655

    申请日:2017-09-08

    Abstract: A method for transmitting an uplink signal by a terminal in a wireless communication system according to an embodiment of the present invention comprises the steps of: receiving information indicating one of a cyclic prefix-orthogonal frequency divisional multiplexing (CP-OFDM) scheme and a discrete Fourier transform-spreading-OFDM (DFT-s-OFDM) scheme from a base station; generating a waveform of an uplink signal according to the indicated scheme; and transmitting the generated waveform of the uplink signal to the base station, wherein modulation of the uplink signal by a terminal through a modulation scheme having a lowest modulation order may be allowed only when the waveform of the uplink signal is generated by the DFT-s-OFDM scheme.

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