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    METHOD AND APPARATUS FOR EXTRACTING RESOURCE BLOCK FROM SIGNAL
    1.
    发明公开
    METHOD AND APPARATUS FOR EXTRACTING RESOURCE BLOCK FROM SIGNAL 审中-公开
    从信号中提取资源块的方法和设备

    公开(公告)号：EP3245770A1

    公开(公告)日：2017-11-22

    申请号：EP15877455.4

    申请日：2015-01-16

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： YU, Shaowei ,  LI, Peng ,  LI, Feng

    IPC分类号： H04L27/26

    CPC分类号： H04L27/2659 ,  H04L27/2647 ,  H04L27/2669 ,  H04W56/001

    摘要： The embodiments disclose a method in a base station for extracting a resource block at a frequency band from a signal received from a terminal device in a radio communication system employing OFDM. The method comprising: removing a CP portion corresponding to the resource block from the signal; for each of a predetermined number of successive symbols in the signal after the CP portion corresponding to the resource block has been removed, performing a FFT of the symbol, extracting a frequency domain signal corresponding to the frequency band from the FFT of the symbol, performing an IFFT on the extracted frequency domain signal to yield a time domain signal, and storing the time domain signal to form a time sequence by concatenation; performing a FFT of the stored time sequence; and extracting subcarriers corresponding to the resource block from the FFT of the stored time sequence.

    METHODS AND APPARATUSES FOR ANTENNA CALIBRATION
    2.
    发明公开
    METHODS AND APPARATUSES FOR ANTENNA CALIBRATION 审中-公开
    用于天线校准的方法和设备

    公开(公告)号：EP3269056A1

    公开(公告)日：2018-01-17

    申请号：EP15884249.2

    申请日：2015-03-11

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： YU, Shaowei ,  ZHU, Huaisong ,  ZONG, Zhiyi

    IPC分类号： H04B17/14

    CPC分类号： H04B17/14 ,  H01Q3/267 ,  H04B7/024 ,  H04B7/04 ,  H04B17/12 ,  H04B17/21 ,  H04L27/34 ,  H04W88/08

    摘要： The present disclosure provides a method and an apparatus in a radio base station for inter-transceiver antenna calibration. The method comprises collecting a first phase difference between a first signal and a first reception signal and a second phase difference between a second signal and a second reception signal. The first signal is transmitted through a reference transmission path of a first transceiver and received through a reference reception path of a second transceiver as the first reception signal. The second signal is transmitted through a reference transmission path of the second transceiver and received through a reference reception path of the first transceiver as the second reception signal. The method further comprises determining and compensating for an inter-loop phase response difference between a first reference path loop of the first transceiver and a second reference path loop of the second transceiver by subtracting the second phase difference from the first phase difference. The first reference path loop consists of the reference transmission path and the reference reception path of the first transceiver, and the second reference path loop consists of the reference transmission path and the reference reception path of the second transceiver.

    METHOD, APPARATUS AND SYSTEM FOR ANTENNA CALIBRATION
    4.
    发明公开
    METHOD, APPARATUS AND SYSTEM FOR ANTENNA CALIBRATION 审中-公开
    方法，设备和系统天线校正

    公开(公告)号：EP2577883A1

    公开(公告)日：2013-04-10

    申请号：EP10851924.0

    申请日：2010-05-28

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： LIAO, Jingyi ,  YU, Shaowei ,  ZONG, Zhiyi

    IPC分类号： H04B7/00

    CPC分类号： H04B17/12 ,  H04B17/104

    摘要： The present invention discloses a method, an apparatus and a system for calibrating antenna, wherein channel transfer functions are obtained for subcarriers on at least one antenna to be calibrated and on a reference antenna, and the obtained channel transfer function of a first subcarrier is filtered by multiplying a symmetry filter with channel transfer functions of said first carrier's neighboring subcarriers, and the filtered channel transfer function is normalized; and a signal carried by the first subcarrier on the antenna to be calibrated is multiplied with the ratio of the filtered and normalized channel transfer function of the first subcarrier on said reference antenna to the filtered and normalized channel transfer function of said first subcarrier to get compensated. This enables to perform joint compensation on a subcarrier basis and thus reduce computation complexity.