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    • 25. 发明公开
    • MULTIPLE ANTENNA MULTIUSER DOWNLINK TRANSMISSION
    • 多天线多用户下行链路传输
    • EP3276846A1
    • 2018-01-31
    • EP16305955.3
    • 2016-07-25
    • ALCATEL LUCENT
    • GERACI, GiovanniFANG, DongCLAUSSEN, Holger
    • H04B7/04H04J11/00H04L5/00H04W72/04H04B7/06
    • H04B7/0452H04B7/06H04B7/0617H04L5/0037
    • A method of controlling signal transmission from a network node towards multiple user equipment, using multiple antennas and a non-orthogonal muptiple access (NOMA) scheme, is disclosed. The method comprises: selecting a plurality of the user equipment the selected user equipment being user equipment that are determined to have a high degree of propagation channel orthogonality with respect to each other, a number of the selected plurality of user equipment being less than or equal to a number of the plurality of antennas; for at least some non-selected user equipment, determining which of the selected user equipment the non-selected user equipment have a highest degree of propagation channel correlation with and grouping the non-selected user equipment with the selected user equipment with which it is most correlated to form a plurality of groups of user equipment; forming a precoding vector for each of the plurality of groups of user equipment; and for each group of user equipment superimposing signals intended for the user equipment within the group, applying the corresponding precoding vector to the superimposed signal and transmitting a resultant signal from one of the antenna towards the group of user equipment.
    • 公开了一种使用多个天线和非正交多点接入(NOMA)方案控制从网络节点到多个用户设备的信号传输的方法。 所述方法包括:选择多个用户设备,所选用户设备是用户设备,所述用户设备被确定为相对于彼此具有高度的传播信道正交性,所选择的多个用户设备的数量小于或等于 到多个天线的数量; 对于至少一些未选择的用户设备,确定哪个选择的用户设备与非选择的用户设备具有最高程度的传播信道相关性并且将未选择的用户设备与所选择的用户设备分组 相关以形成多个用户设备组; 为多个用户设备组中的每个用户设备形成预编码向量; 并且为每组用户设备叠加预期给该组内的用户设备的信号,将相应的预编码向量应用于叠加信号并从天线中的一个向用户设备组发送结果信号。
    • 26. 发明公开
    • TRANSMITTING METHOD, RECEIVING METHOD, TRANSMITTER AND RECEIVER
    • 发送方法,接收方法,发送器和接收器
    • EP3258631A1
    • 2017-12-20
    • EP17183530.9
    • 2012-11-07
    • Sun Patent Trust
    • PETROV, Mihail
    • H04L1/00H04L27/34
    • H04B7/06H04L1/0042H04L1/0071H04L27/3444H04L27/345
    • D-dimensional vectors that each have D real-valued symbols as elements are converted into D-dimensional rotated vectors that each have D real symbols as elements. The conversion is performed by multiplying each of the D-dimensional vectors by a D×D orthogonal matrix. A complex symbol sequence including N C = N S /2 complex symbols is generated from N S real symbols. The complex symbol sequence is generated such that the distance between any two of the D real symbols of each of the D-dimensional rotated vectors is N C /D complex symbols or N C /D-l complex symbols, or such that the distance between any two of the D real symbols of each of the D-dimensional rotated vectors, except for part of the D-dimensional rotated vectors, is N C /D complex symbols or N C /D-l complex symbols.
    • 分别具有D个实值符号作为元素的D维矢量被转换为D个旋转矢量,每个D维旋转矢量具有D个实数符号作为元素。 通过将每个D维矢量乘以D×D正交矩阵来执行该转换。 从NS个实符号生成包括NC = NS / 2个复符号的复符号序列。 生成复数符号序列,使得每个D维旋转向量中的任何两个D实符号之间的距离是NC / D复数符号或NC / Dl复数符号,或者使得任何两个D维实数符号之间的距离 D维旋转向量中的每一个的除D维旋转向量之外的D个实符号是NC / D复数符号或NC / D1复数符号。
    • 30. 发明公开
    • PRE-CODING METHOD, DEVICE AND SYSTEM
    • 预编码方法,装置和系统
    • EP3236605A1
    • 2017-10-25
    • EP14908206.7
    • 2014-12-18
    • Huawei Technologies Co., Ltd.
    • LI, QiaojieWANG, XiangZHOU, Bin
    • H04L1/00H04B7/06
    • H04B7/06H04L1/00
    • Embodiments of the present invention provide a precoding method, an apparatus, and a system. The precoding method in the present invention includes: obtaining a channel matrix on each subcarrier, where the channel matrix includes channel vectors of all CPEs on the subcarrier, and the CPEs include a linear CPE supporting linear precoding and a non-linear CPE supporting non-linear precoding; obtaining a precoding matrix by means of calculation according to the channel matrix; performing, according to the channel matrix, non-linear precoding on a signal to be sent to the non-linear CPE; and performing linear precoding on to-be-sent signals according to the precoding matrix, where the to-be-sent signals include a signal to be sent to the linear CPE and the signal that is to be sent to the non-linear CPE and on which non-linear precoding has been performed. The embodiments of the present invention achieve a win-win effect of maintaining a rate of a linear CPE and improving a rate of a non-linear CPE, and can decrease a bit error rate and improve system stability.
    • 本发明实施例提供了一种预编码方法,装置和系统。 本发明的预编码方法包括:获取每个子载波上的信道矩阵,该信道矩阵包括子载波上所有CPE的信道矢量,CPE包括支持线性预编码的线性CPE和支持非线性预编码的非线性CPE, 线性预编码; 根据信道矩阵通过计算获得预编码矩阵; 根据所述信道矩阵对待发送给所述非线性CPE的信号进行非线性预编码; 并根据所述预编码矩阵对待发送信号进行线性预编码,所述待发送信号包括待发送给所述线性CPE的信号和待发送给所述非线性CPE的信号,以及 在其上已经执行了非线性预编码。 本发明实施例实现了保持线性CPE速率,提高非线性CPE速率的双赢效果,可以降低误码率,提高系统稳定性。