METHOD BY WHICH BASE STATION TRANSMITS SIGNAL ON BASIS OF ANTENNA ARRAY IN WIRELESS COMMUNICATION SYSTEM, AND APPARATUS THEREFOR

    公开(公告)号:US20220021428A1

    公开(公告)日:2022-01-20

    申请号:US17295991

    申请日:2019-11-14

    Abstract: A method by which a base station transmits a signal on the basis of an antenna array in a wireless communication system, according to an embodiment of the present invention, comprises the steps of: determining a multi-rank beam in consideration of (i) positions of a plurality of terminals and (ii) positions of null points of a beam generated through the antenna array; and transmitting signals to the plurality of terminals by using the multi-rank beam. The antenna array may be based on a three-dimensional shape having omnidirectional symmetry, and the positions of the null points and the positions of the plurality of terminals may be configured on the basis of a polar coordinate system using the center of the antenna array as an origin point.

    Method for reporting channel state information in wireless communication system and apparatus therefor

    公开(公告)号:US11146369B2

    公开(公告)日:2021-10-12

    申请号:US16499136

    申请日:2018-03-26

    Abstract: A method for reporting channel state information by a terminal in a wireless communication system according to an embodiment of the present invention may comprise the steps of: receiving, from a base station, CSI-RS resource configuration information for receiving a first CSI-RS resource; receiving the first CSI-RS resource on the basis of the CSI resource configuration information; and reporting, to the base station, first CSI generated on the basis of the first CSI-RS resource, wherein, when the terminal receives configuration of one N-port CSI-RS resource according to the CSI resource configuration information, some ports of the one Y-port CSI-RS resource are configured for channel measurement for the terminal, and the remaining ports except for the some ports of the one Y-port CSI-RS resource are configured for interference measurement for the terminal.

    Method and apparatus for uplink signal transmission based on codebook in a wireless communication system

    公开(公告)号:US11101856B2

    公开(公告)日:2021-08-24

    申请号:US16995376

    申请日:2020-08-17

    Abstract: A method for transmitting an uplink signal based on a codebook by a UE in a wireless communication system includes: receiving, from a base station, downlink control information (DCI) for determining a precoding matrix applied to transmission of the uplink signal; determining the precoding matrix applied to the transmission of the uplink signal from a codebook subset related to the transmission of the uplink signal based on the DCI; and transmitting, to the base station, the uplink signal based on the determined precoding matrix, I which based on that a difference between phase values applied to antenna ports for the transmission of the uplink signal is maintained in some antenna ports among all antenna port pairs, the codebook subset includes at least one specific precoding matrix applying different phase values to antenna ports included in all or some of the some antenna ports.

    Method for channel state measurement in wireless communication system and apparatus therefor

    公开(公告)号:US11082138B2

    公开(公告)日:2021-08-03

    申请号:US16499712

    申请日:2018-03-28

    Abstract: A method for a channel state measurement in a wireless communication system according to an embodiment of the present disclosure is performed by a terminal, and may comprise the steps of: receiving a resource setting related to a reference signal for the channel state measurement from a base station; receiving information related to the number of transport layers of the base station at the time of the channel state measurement or the number of transport layers of the base station at the time of scheduling on the basis of the channel state measurement; and performing the channel state measurement by using the received information.

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