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    Transmitter and transmission method
    2.
    发明公开
    Transmitter and transmission method 审中-公开
    发射器和传输方法

    公开(公告)号：EP2584713A3

    公开(公告)日：2014-01-15

    申请号：EP13151826.8

    申请日：2008-06-17

    申请人： NTT DoCoMo, Inc.

    发明人： Taoka, Hidekazu ,  Abe, Tetsushi

    IPC分类号： H04B7/04 ,  H04B7/06 ,  H04J1/00 ,  H04J11/00

    CPC分类号： H04B7/0456 ,  H04B7/0617 ,  H04B7/0639 ,  H04B7/0689

    摘要： A transmitter includes multiple transmit antennas, a conversion unit configured to generate multiple signal sequences corresponding to a predefined frequency bandwidth from one or more transmission streams associated with any of the transmit antennas, a precoding unit configured to weight the signal sequences with a precoding matrix selected from a codebook including multiple predefined precoding matrices, and a transmitting unit configured to convert an output signal from the precoding unit into a number of signals corresponding to the number of transmit antennas and transmit the converted signals from the transmit antennas. The precoding unit applies distinct precoding matrices to different signal sequences, and an association between the distinct precoding matrices and the different signal sequences is determined through open-loop control being independent of a feedback from a receiver.

    USER TERMINAL APPARATUS, RADIO BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD
    4.
    发明公开
    USER TERMINAL APPARATUS, RADIO BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD 审中-公开
    用户终端装置，无线电基站装置和无线电通信方法

    公开(公告)号：EP3236611A1

    公开(公告)日：2017-10-25

    申请号：EP17173028.6

    申请日：2012-04-24

    申请人： NTT DoCoMo, Inc.

    发明人： Nagata, Satoshi ,  Abe, Tetsushi ,  Kishiyama, Yoshihisa ,  Takeda, Kazuaki

    IPC分类号： H04L5/00 ,  H04W72/04

    CPC分类号： H04L5/0007 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0039 ,  H04L5/0048 ,  H04L5/0053 ,  H04W72/042

    摘要： A user terminal apparatus comprises a reception section configured to receive an enhanced control format indicator (enhanced CFI) indicating a starting position in a time domain of an enhanced physical downlink control channel (enhanced PDCCH) by using an enhanced physical control format indicator channel (enhanced PCFICH); and a control section configured to control reception of the enhanced PDCCH based on the enhanced CFI.

    摘要翻译： 用户终端设备包括：接收部分，被配置为通过使用增强物理控制格式指示符信道（增强型物理控制格式指示符信道）来接收指示增强物理下行链路控制信道（扩展PDCCH）的时域中的开始位置的增强型控制格式指示符（增强型CFI） PCFICH）; 以及控制部分，被配置为基于增强型CFI来控制扩展PDCCH的接收。

    RADIO COMMUNICATION SYSTEM, FEEDBACK METHOD, USER TERMINAL, AND RADIO BASE STATION APPARATUS
    5.
    发明公开
    RADIO COMMUNICATION SYSTEM, FEEDBACK METHOD, USER TERMINAL, AND RADIO BASE STATION APPARATUS 有权
    FUNKKOMMUNIKATIONSSYSTEM，RÜCKKOPPLUNGSVERFAHREN，BENUTZERENDGERÄT，UND FUNBASISSTATIONSVORRICHTUNG

    公开(公告)号：EP2961221A1

    公开(公告)日：2015-12-30

    申请号：EP15178232.3

    申请日：2012-10-01

    申请人： NTT DoCoMo, Inc.

    发明人： Nagata, Satoshi ,  Abe, Tetsushi ,  Kishiyama, Yoshihisa

    IPC分类号： H04W36/30 ,  H04B7/02 ,  H04B7/06 ,  H04L1/00 ,  H04J11/00

    CPC分类号： H04B15/00 ,  H04B7/024 ,  H04B7/0626 ,  H04J11/0053 ,  H04L1/0031 ,  H04L5/0035 ,  H04L5/0048 ,  H04L5/0057 ,  H04L5/0073

    摘要： The present invention is designed to feed back channel state information, from which adequate received quality can be calculated, upon CoMP transmission. A radio communication system is provided, which includes a plurality of radio base station apparatuses and a user terminal which is configured to be able to communicate with the plurality of radio base station apparatuses, and, in this radio communication system, a radio base station apparatus (eNB) has a transmission section configured to transmit a reference signal for channel state measurement to a user terminal (UE), and a receiving section configured to receive channel state information generated in the user terminal (UE) based on the reference signal, and the user terminal (UE) has a channel state information generating section configured to be able to generate a plurality of pieces of channel state information, including channel state information from which interference from a coordinated cell is cancelled, when the plurality of radio base station apparatuses coordinate and perform transmission, and a transmission section configured to transmit the plurality of pieces of channel sate information to the radio base station apparatus.

    摘要翻译： 本发明被设计为反馈信道状态信息，从而可以在CoMP传输时从其中计算足够的接收质量。 提供了一种无线通信系统，其包括多个无线基站装置和被配置为能够与多个无线基站装置进行通信的用户终端，在该无线通信系统中，设置无线基站装置 （eNB）具有被配置为向用户终端（UE）发送用于信道状态测量的参考信号的发送部分，以及基于所述参考信号在所述用户终端（UE）中生成的信道状态信息的接收部分，以及 用户终端（UE）具有信道状态信息生成部，其被配置为能够生成多条信道状态信息，包括：来自协作小区的干扰被消除的信道状态信息，当多个无线基站装置 协调和执行传输;以及发送部分，被配置为发送多条信道 向无线基站装置提供信息。

    Receiver apparatus, transmitter apparatus and methods for providing precoding information
    6.
    发明公开
    Receiver apparatus, transmitter apparatus and methods for providing precoding information 有权
    Empfängerund Verfahren zur Lieferung von Vorcodierungsinformation

    公开(公告)号：EP1919098A1

    公开(公告)日：2008-05-07

    申请号：EP06022649.5

    申请日：2006-10-30

    申请人： NTT DoCoMo Inc.

    发明人： Abe, Tetsushi

    IPC分类号： H04B7/06 ,  H04L25/03

    CPC分类号： H04L25/03343 ,  H04B7/0417 ,  H04B7/0634 ,  H04B7/0639 ,  H04B7/0641 ,  H04B7/065 ,  H04L2025/03414 ,  H04L2025/03808

    摘要： Receiver apparatus (700) for providing precoding information, comprising a detector (710) for detecting an event and a transmit unit (720) for transmitting absolute precoding information at a first time instant in response to a detected occurrence of the event and for transmitting differential precoding information at a second time instant different from the first time instant.

    摘要翻译： 用于提供预编码信息的接收机装置（700），包括用于检测事件的检测器（710）和用于响应于检测到的事件的发生而在第一时刻发送绝对预编码信息的发送单元（720），并且用于发送差分 在与第一时刻不同的第二时刻的预编码信息。

    Turbo-reception method and turbo-receiver for a MIMO system
    7.
    发明公开
    Turbo-reception method and turbo-receiver for a MIMO system 有权
    Turbo-Empfängerund das entsprechende Verfahrenfürein MIMO系统

    公开(公告)号：EP1233565A2

    公开(公告)日：2002-08-21

    申请号：EP02003795.8

    申请日：2002-02-20

    申请人： NTT DoCoMo, Inc.

    发明人： Abe, Tetsushi ,  Fujii, Hiromasa ,  Tomisato, Shigeru ,  Matsumoto, Tadashi

    IPC分类号： H04L1/00 ,  H03M13/29

    CPC分类号： H04L25/0236 ,  H04L1/005 ,  H04L25/0204

    摘要： An impluse response h mn (q) of each transmission path is estimated from N received signals r m (m=1, ···, M) and a known signal (for a number of users equal to N, n=1, ···, N). M×N matrix H (q) having h mn (q) as an element and a Q×Q matrix H having H (q) as an element are determined (where Q represents a number of multipaths of each transmitted wave and q=0, ···, Q-1). A soft decision value b' n (k) is determined from decoded λ 2 [b n (k)], and this is used to generate an interference component matrix B' (k) to generate an interference replica H·B' (k). The interference replica H·B' (k) is subtracted from a received matrix y (k) to determine y' (k). y (k) and H are used to determine an adaptive filter coefficient w n (k) to be applied to an n-th user in order to eliminate residual interference components in y' (k) according to the minimum mean square error criteria. y (k) is passed through w n (k) to provide a log-likelihood ratio as a received signal from the user n from which interferences are eliminated.

    摘要翻译： 从N个接收信号rm（m = 1，...，M）和已知信号（对于等于N，n = 1，...的用户数量）来估计每个传输路径的内在响应hmn（q） ，N）。 确定具有hmn（q）作为元素的M×N矩阵H（q）和具有H（q）作为元素的QxQ矩阵H（其中Q表示每个发送波的多径的数量，q = 0，...， Q-1）。 从解码的λ2Äbn（k）Ü确定软判定值b'n（k），并且这用于产生干扰分量矩阵B'（k）以产生干扰复制品H.B'（k）。 从接收矩阵y（k）中减去干扰副本H.B'（k）以确定y'（k）。 y（k）和H用于确定要施加到第n个用户的自适应滤波器系数wn（k），以便根据最小均方误差准则来消除y'（k）中的残余干扰分量。 y（k）通过wn（k），以提供对数似然比作为来自消除干扰的用户n的接收信号。

    MICRO BASE STATION, USER TERMINAL AND RADIO COMMUNICATION METHOD
    8.
    发明公开
    MICRO BASE STATION, USER TERMINAL AND RADIO COMMUNICATION METHOD 审中-公开

    公开(公告)号：EP3364572A1

    公开(公告)日：2018-08-22

    申请号：EP18164969.0

    申请日：2012-02-13

    申请人： NTT DOCOMO, INC.

    发明人： Abe, Tetsushi ,  Nagata, Satoshi ,  Takeda, Kazuaki

    IPC分类号： H04J11/00 ,  H04W48/12 ,  H04W48/10 ,  H04W88/08

    CPC分类号： H04W72/042 ,  H04J11/0056 ,  H04L1/1812 ,  H04L5/00 ,  H04L5/0007 ,  H04L5/0035 ,  H04L5/0053 ,  H04L5/0073 ,  H04L5/0091 ,  H04W16/14 ,  H04W16/32 ,  H04W24/10 ,  H04W48/10 ,  H04W48/12 ,  H04W72/1226 ,  H04W88/08

    摘要： The present invention is designed to reduce interference and relates to a radio communication control method in a radio base station, the method comprising the steps of allocating in a specific subframe, a physical downlink data channel (PDSCH) and a physical downlink control channel (X-PDCCH) by frequency-division-multiplexing to a first radio resource, from a first symbol in the first radio resource, the first radio resource being a data field corresponding to symbols following a first predetermined number of symbols in the specific subframe, and allocating, in another specific subframe, a physical downlink data channel (PDSCH) and a physical downlink control channel (X-PDCCH) by frequency-division-multiplexing to a second radio resource, the second radio resource being an expanded data field including given symbols prior to the first radio resource, the physical downlink data channel (PDSCH) being allocated to the second radio resource, from a first symbol in the second radio resource, and the physical downlink control channel (X-PDCCH) being allocated to symbols following the given symbols in the second radio resource; and notifying a user terminal (UE) of information about physical downlink control channel (X-PDCCH) configuration by higher layer signalling. The present invention is also characterized in providing a radio communication control method in a user terminal, a radio base station, a user terminal and a radio communication system.