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    • 5. 发明授权
    • Method of transmitting uplink DM-RS multiplexed with data in uplink MIMO transmission
    • 在上行MIMO传输中传输与数据多路复用的上行DM-RS的方法
    • US08718168B2
    • 2014-05-06
    • US13010426
    • 2011-01-20
    • Byung Jang JeongBangwon SeoYoung Jo Ko
    • Byung Jang JeongBangwon SeoYoung Jo Ko
    • H04B7/02
    • H04B7/0413H04L5/0023H04L5/0044H04L5/0048
    • Provided is a multi-layer transmission method of multiplexing and transmitting data and a demodulation reference signal (DM-RS) sequence in an uplink digital Fourier transform-spread-orthogonal frequency division multiplexing (DFT-S-OFDM) transmission employing multiple-input multiple-output (MIMO). The method includes allocating one DM-RS sequence as a DM-RS sequence of a first transmission layer for uplink transmission; allocating a DM-RS sequence whose cyclic shift (CS) value having the same sequence as the DM-RS sequence of the first transmission layer is configured to differ from that of the DM-RS sequence as a DM-RS sequence of a second transmission layer; and multiplexing layer-specific data and the layer-specific DM-RS sequences according to each of the first and second transmission layers. Accordingly, an RS can be transmitted in more OFDM symbols of a slot or subframe without an increase in overhead. Consequently, it is possible to satisfy requirements of LTE-advanced that a high frequency spectrum and a high mobile velocity should be supported, and transmit and receive a DM-RS multiplexed with data while maintaining orthogonality.
    • 提供了一种在上行数字付里叶变换扩展正交频分复用(DFT-S-OFDM)传输中多路传输数据和解调参考信号(DM-RS)序列的多层传输方法,该传输采用多输入多重 输出(MIMO)。 该方法包括:分配一个DM-RS序列作为上行链路传输的第一传输层的DM-RS序列; 分配具有与第一传输层的DM-RS序列相同的序列的循环移位(CS)值被配置为与DM-RS序列不同的DM-RS序列作为第二传输的DM-RS序列 层; 以及根据第一和第二传输层中的每一个复用层特定数据和层特定DM-RS序列。 因此,可以在时隙或子帧的更多OFDM符号中发送RS而不增加开销。 因此,可以满足LTE的要求,即应当支持高频谱和高移动速度,并且在保持正交性的同时发送和接收与数据多路复用的DM-RS。
    • 8. 发明申请
    • COMMUNICATION SYSTEM INCLUDING BASE STATIONS AND TERMINAL FOR MULTI-CELL COOPERATIVE COMMUNICATION
    • 通信系统,包括基站和终端用于多小区协同通信
    • US20110151918A1
    • 2011-06-23
    • US13059903
    • 2009-08-14
    • Bangwon SeoYoung Jo KoJae Young Ahn
    • Bangwon SeoYoung Jo KoJae Young Ahn
    • H04B7/26
    • H04B7/024H04B7/0413H04B7/0426H04B7/0617H04B7/0639H04B7/0671
    • Provided is a communication system for a multi-cell cooperative communication. A serving base station and at least one neighboring base station may communicate with at least one terminal through mutual cooperation. Each of the serving base station and the at least one neighboring base station may shift a phase of at least one element among elements included in a precoding matrix, using a phase shift matrix, and precode at least one data symbol. A terminal may feed back preferred phase shift matrix information to the serving base station, so that the serving base station and the at least one neighboring base station may adaptively determine a phase shift matrix. The terminal may calculate the phase shift matrix with small calculation amounts. The serving base station, the at least one neighboring base station, and the terminal may pre-store a plurality of candidate matrices with respect to the phase shift matrix.
    • 提供了一种用于多小区协作通信的通信系统。 服务基站和至少一个相邻基站可以通过相互协作与至少一个终端进行通信。 服务基站和至少一个相邻基站中的每个可以使用相移矩阵来移位包括在预编码矩阵中的元素中的至少一个元素的相位,并且对至少一个数据符号进行预编码。 终端可以将优选的相移矩阵信息反馈到服务基站,使得服务基站和至少一个相邻基站可以自适应地确定相移矩阵。 终端可以以较小的计算量计算相移矩阵。 服务基站,至少一个相邻基站和终端可以相对于相移矩阵预存储多个候选矩阵。