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    • 83. 发明授权
    • Radio communication apparatus and resending controlling method
    • 无线电通信装置和重新发送控制方法
    • US08374276B2
    • 2013-02-12
    • US12518787
    • 2007-12-07
    • Masayuki HoshinoKatsuhiko Hiramatsu
    • Masayuki HoshinoKatsuhiko Hiramatsu
    • H04B7/02H04L1/02
    • H04B7/068H04B7/04H04L1/1867
    • A synthesized gain in a resending operation can be improved significantly by relatively simple control when resending control is applied upon executing of a transmission diversity using CDD. A radio communication apparatus equipped with a plurality of antennas and for performing communication by MIMO, includes a phase shift amount assigning section 18 for executing a CDD process to assign a cyclic phase shift to a transmission signal on a frequency axis, a response signal demodulator 16 for demodulating ACK/NACK received from a destination station, and outputting control information about a resending operation when NACK is received and a reception is failed, and an initial phase controller 17 for setting an offset to a phase shift at a time of CDD process in response to a number of transmission times in resending control such that a predetermined offset, which is produced by adding a phase difference from a signal transmitted from other antenna to the phase shift, is assigned to a signal transmitted from the antenna over a full frequency band, wherein a frequency characteristic of a radio propagation path at a time of resending is changed every time of transmission times.
    • 通过在执行使用CDD的传输分集时重新执行控制时,通过相对简单的控制可以显着地改善重新发送操作中的合成增益。 配备有多个天线并用于通过MIMO进行通信的无线电通信装置包括:相移量分配部分18,用于执行CDD处理以向频率轴上的发送信号分配循环相移;响应信号解调器16 用于解调从目的地站接收的ACK / NACK,并且当接收到NACK并且接收失败时,输出关于重新发送操作的控制信息;以及初始相位控制器17,用于在CDD处理时将偏移设置为相移 响应于重发控制中的多个发送时间,使得通过将从其他天线发送的信号相加到相移而产生的预定偏移被分配给在全频带上从天线发送的信号 其中,每次发送时间改变重发时的无线传播路径的频率特性。
    • 89. 发明申请
    • METHOD AND DEVICE FOR SETTING DEMODULATION REFERENCE SIGNALS IN WIRELESS COMMUNICATION SYSTEM
    • 用于在无线通信系统中设置解调参考信号的方法和设备
    • US20120093124A1
    • 2012-04-19
    • US13378134
    • 2010-04-09
    • Zhi ZhangMing XuMasayuki HoshinoSeigo NakaoDaichi Imamura
    • Zhi ZhangMing XuMasayuki HoshinoSeigo NakaoDaichi Imamura
    • H04W72/04
    • H04L5/0048H04L5/0035H04W72/00H04W72/04
    • The present invention provides a method of arranging demodulation reference signals in a radio communication system that communicates according to a coordinated scheme. Demodulation reference signals and data are transmitted to a receiving terminal through time/frequency resources of the radio communication system using a resource block as a base unit. The method includes arranging at least two orthogonal DM-RSs in two edge OFDM symbols for resource blocks of respective cells, a frequency offset existing between cells at positions of the orthogonal DM-RSs in the edge OFDM symbols, performing puncturing at positions corresponding to the orthogonal DM-RSs of the other cells in the edge OFDM symbols of the respective cells, arranging superimposing DM-RSs in the two edge OFDM symbols in a resource block of one cell and arranging the superimposing DM-RSs at positions corresponding to the resource blocks of the other cells, wherein positions of the superimposing DM-RSs are set between the positions of the orthogonal DM-RSs in the respective edge OFDM symbols.
    • 本发明提供一种在根据协调方案通信的无线通信系统中布置解调参考信号的方法。 解调参考信号和数据通过使用资源块作为基本单元的无线电通信系统的时间/频率资源被发送到接收终端。 该方法包括在两个边缘OFDM符号中为相应小区的资源块布置至少两个正交的DM-RS,频率偏移存在于边缘OFDM符号中的正交DM-RS的位置处的小区之间,在对应于 在各个小区的边缘OFDM符号中的其他小区的正交DM-RS,将两个边缘OFDM符号中的DM-RS叠加在一个小区的资源块中,并将叠加的DM-RS布置在与资源块对应的位置 其中叠加DM-RS的位置被设置在各边缘OFDM符号中的正交DM-RS的位置之间。