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34 条记录 (耗时 0.019 秒)

    BASE STATION
    22.
    发明公开
    BASE STATION 审中-公开

    公开(公告)号：EP3419187A1

    公开(公告)日：2018-12-26

    申请号：EP17763308.8

    申请日：2017-03-08

    申请人： NTT DOCOMO, INC.

    发明人： OBARA, Tatsunori ,  SUYAMA, Satoshi ,  OKUYAMA, Tatsuki ,  OKUMURA, Yukihiko

    IPC分类号： H04B7/0413 ,  H04L27/26 ,  H04W16/28

    摘要： A base station transmits first discovery signals in different transmission directions from the base station through beamforming; transmits, for one or more first transmission directions corresponding to one or more first discovery signals reported from the mobile station, second discovery signals in second transmission directions within a predetermined range from the first transmission direction; and, for transmitting the second discovery signal, transmits the second discovery signal by multiplying, by a correction precoding vector for adding, to the first transmission direction, a transmission angle difference between the first transmission direction within the predetermined range from the second discovery signal and a second transmission direction of the second discovery signal to be transmitted, and by performing beamforming for the second discovery signal to which the correction precoding vector is multiplied, using a first weight matrix for beamforming in the first transmission direction within the predetermined range from the second discovery signal.

    RADIO COMMUNICATION CONTROL METHOD AND RADIO COMMUNICATION SYSTEM
    23.
    发明公开
    RADIO COMMUNICATION CONTROL METHOD AND RADIO COMMUNICATION SYSTEM 审中-公开
    无线电通信控制方法和无线电通信系统

    公开(公告)号：EP3276860A1

    公开(公告)日：2018-01-31

    申请号：EP16768819.1

    申请日：2016-03-23

    申请人： NTT DOCOMO, INC.

    发明人： OBARA, Tatsunori ,  SUYAMA, Satoshi ,  SHEN, Jiyun ,  OKUMURA, Yukihiko

    IPC分类号： H04J99/00 ,  H04B7/04 ,  H04B7/10 ,  H04W16/28 ,  H04W88/02

    CPC分类号： H04B7/0617 ,  H04B7/04 ,  H04B7/0695 ,  H04B7/08 ,  H04B7/088 ,  H04B7/10 ,  H04W16/28 ,  H04W88/02

    摘要： A number L R of receive beamforming circuits provided in a receive beamformer execute receive beamforming (N R /L R ) times with respect to a received signal vector received by N R reception antennas A R , thereby generating a receive beamforming (BF) output vector having N R receive BF output components. A calculation processor calculates a reception power for each of the N R receive BF output components, selects L R receive BF output components in decreasing order of reception power, and determines a suitable receive BF weight matrix including L R reception orthogonal BF weight vectors corresponding to the selected receive BF output components.

    摘要翻译： 接收波束形成器中提供的接收波束形成电路的数目LR相对于由NR个接收天线AR接收的接收信号矢量执行接收波束形成（NR / LR）时间，从而生成具有NR个接收BF输出的接收波束形成（BF）输出矢量 组件。 计算处理器计算每个NR个接收BF输出分量的接收功率，以接收功率的降序选择LR个接收BF输出分量，并且确定包括对应于所选接收的LR个接收正交BF权重向量的合适接收BF权重矩阵 BF输出组件。

    WIRELESS BASE STATION, USER TERMINAL, AND WIRELESS COMMUNICATIONS METHOD
    24.
    发明公开
    WIRELESS BASE STATION, USER TERMINAL, AND WIRELESS COMMUNICATIONS METHOD 审中-公开
    无线基站，用户终端和无线通信方法

    公开(公告)号：EP3043587A1

    公开(公告)日：2016-07-13

    申请号：EP14843031.7

    申请日：2014-09-02

    申请人： NTT DOCOMO, INC.

    发明人： SHEN, Jiyun ,  SUYAMA, Satoshi ,  OKUMURA, Yukihiko

    IPC分类号： H04W16/28 ,  H04B7/10 ,  H04J99/00 ,  H04W72/04 ,  H04W88/08

    CPC分类号： H04L5/0048 ,  H04B7/0417 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/0697 ,  H04W16/28 ,  H04W72/04 ,  H04W88/08

    摘要： The present invention is designed so that, in a communication system to employ massive MIMO, data signals to which beamforming is applied can be transmitted adequately. A radio base station transmits a data signal to a user terminal by applying beamforming using a plurality of antenna elements, and has a determining section that determines the type of a weight to apply to the data signal for beamforming, a generating section that generates a reference signal which the user terminal uses in channel estimation, a weight control section that controls weights to apply to transmitting signals, and a transmitting section that transmits the data signal and the reference signal, and the weight control section determines whether or not to apply a weight to the reference signal based on the type of the weight.

    摘要翻译： 本发明被设计为使得在采用大量MIMO的通信系统中，能够适当地发送应用了波束形成的数据信号。 无线电基站通过使用多个天线元件应用波束成形来向用户终端发送数据信号，并且具有确定部件，该确定部件确定要应用于用于波束成形的数据信号的权重的类型;生成部件， 用户终端在信道估计中使用的信号;权重控制部分，其控制权重以应用于发送信号;以及发送部分，其发送数据信号和参考信号，并且权重控制部分确定是否应用权重 到基于重量类型的参考信号。

    ESTIMATION DEVICE
    29.
    发明公开
    ESTIMATION DEVICE 审中-公开

    公开(公告)号：EP3422590A1

    公开(公告)日：2019-01-02

    申请号：EP17763356.7

    申请日：2017-03-09

    申请人： NTT DOCOMO, INC.

    发明人： OBARA, Tatsunori ,  SUYAMA, Satoshi ,  OKUYAMA, Tatsuki ,  OKUMURA, Yukihiko

    IPC分类号： H04B7/0413 ,  H04B7/10 ,  H04L27/26

    摘要： There is provided an estimation device including an acquisition unit that acquires a channel estimation value for each combination of all of a plurality of combinations between a plurality of transmission antenna elements included in a base station and a plurality of reception antenna elements included in a mobile station; and an estimation unit that calculates a channel impulse response for each combination of all of the plurality of combinations between the plurality of transmission antenna elements and the plurality of reception antenna elements using the channel estimation values, and that estimates power delay profile by averaging, over all the combinations of the plurality of combinations between the plurality of transmission antenna elements and the plurality of reception antenna elements, power values for the respective combinations that are calculated from the calculated channel impulse responses for the respective combinations.