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    • 32. 发明授权
    • Method and apparatus for switching between single user detection and multi user detection
    • 用于单用户检测和多用户检测之间切换的方法和装置
    • US08983389B2
    • 2015-03-17
    • US13009174
    • 2011-01-19
    • Kapil BhattadPeter GaalAlexei Yurievitch GorokhovJuan MontojoNaga Bhushan
    • Kapil BhattadPeter GaalAlexei Yurievitch GorokhovJuan MontojoNaga Bhushan
    • H04B1/00H04B7/04H04B7/06H04B7/08
    • H04B7/0452H04B7/0689H04B7/0871
    • Certain aspects of the present disclosure propose methods and apparatuses for detecting whether a user device is scheduled for a single user (SU) multiple-input multiple-output (MIMO) communication mode or for a multi-user (MU) MIMO communication mode. In an aspect, a method for wireless communications is provided which includes measuring, at a first apparatus based on received pilot signals, a first receive power corresponding to a first channel associated with the first apparatus, measuring, based on the received pilot signals, a second receive power corresponding to a second channel associated with at least one potentially present second apparatus, measuring a residual interference based on the received pilot signals, and determining, based on at least one of the first receive power, the second receive power and the residual interference, whether to apply a MU detection or a SU detection for estimating data received at the first apparatus.
    • 本公开的某些方面提出了用于检测是否为单用户(SU)多输入多输出(MIMO)通信模式或多用户(MU)MIMO通信模式)调度用户设备的方法和装置。 一方面,提供了一种用于无线通信的方法,其包括在第一装置基于接收到的导频信号测量与第一装置相关联的第一信道对应的第一接收功率,基于接收到的导频信号, 对应于与至少一个潜在存在的第二装置相关联的第二信道的第二接收功率,基于接收到的导频信号测量残余干扰,以及基于所述第一接收功率,所述第二接收功率和所述残差中的至少一个来确定 干扰,是否应用MU检测或SU检测来估计在第一装置处接收到的数据。
    • 33. 发明授权
    • Method and apparatus of using CDD like schemes with UE-RS based open loop beamforming
    • 使用基于UE-RS的开环波束形成的CDD类似方案的方法和装置
    • US08934560B2
    • 2015-01-13
    • US13253747
    • 2011-10-05
    • Kapil BhattadPeter Gaal
    • Kapil BhattadPeter Gaal
    • H04B7/02H04L25/03H04B7/04H04B7/06H04L5/00
    • H04B7/0486H04B7/0478H04B7/0617H04B7/0671H04L5/0023H04L25/03343H04L2025/03426
    • A method and apparatus of wireless communication are disclosed. The wireless communication performs pilot signal transmissions using a first precoding matrix for user equipment specific pilot signals, the pilot signal transmissions having a first transmission rank. The wireless communication also performs data transmissions using a second precoding matrix for data when the data transmissions have a second transmission rank less than the first transmission rank, in which the second precoding matrix includes a transformed version of the first precoding matrix. Alternatively, the wireless communication can perform data transmissions using at least two precoding matrices for data when the data transmissions have a second transmission rank less than or equal to the first transmission rank. Accordingly, the precoding matrix used for data is a transformed version of the precoding matrix used for user equipment specific pilot signals.
    • 公开了一种无线通信的方法和装置。 无线通信使用用于用户设备专用导频信号的第一预编码矩阵来执行导频信号传输,导频信号传输具有第一传输等级。 当数据传输具有小于第一传输秩的第二传输级时,无线通信还使用用于数据的第二预编码矩阵执行数据传输,其中第二预编码矩阵包括第一预编码矩阵的变换版本。 或者,当数据传输具有小于或等于第一传输等级的第二传输等级时,无线通信可以使用用于数据的至少两个预编码矩阵来执行数据传输。 因此,用于数据的预编码矩阵是用于用户设备专用导频信号的预编码矩阵的变换版本。
    • 34. 发明授权
    • Channel feedback based on reference signal
    • 基于参考信号的信道反馈
    • US08599708B2
    • 2013-12-03
    • US13006216
    • 2011-01-13
    • Wanshi ChenKapil BhattadPeter GaalAlexei Yurievitch GorokhovJuan Montojo
    • Wanshi ChenKapil BhattadPeter GaalAlexei Yurievitch GorokhovJuan Montojo
    • G06F11/00H04J1/16H04L1/00H04L12/26
    • H04W24/08H04L1/0026H04L1/0028H04L5/0041H04L5/0048
    • Techniques for supporting channel measurement and reporting in a wireless communication system are described. In one design, a cell transmits a cell-specific reference signal (CRS) used for channel estimation and coherent demodulation and a channel spatial information reference signal (CSI-RS) used for channel measurement and channel feedback reporting. The cell may transmit the CSI-RS less frequently than the CRS, or from more antenna ports than the CRS, or on fewer resource elements than the CRS, or a combination thereof. In one design, a user equipment (UE) determines at least one bandwidth part configured for the UE, with each bandwidth part covering at least one subband. The UE receives the CRS and CSI-RS from the cell, determines channel feedback information for the at least one bandwidth part based on the CSI-RS, sends the channel feedback information to the cell, and receives data transmitted by the cell based on the channel feedback information.
    • 描述了在无线通信系统中支持信道测量和报告的技术。 在一种设计中,小区发送用于信道估计和相干解调的小区特定参考信号(CRS)以及用于信道测量和信道反馈报告的信道空间信息参考信号(CSI-RS)。 小区可以比CRS更频繁地发送CSI-RS,或者比比CRS更多的天线端口或比CRS更少的资源元素或其组合来发送CSI-RS。 在一种设计中,用户设备(UE)确定为UE配置的至少一个带宽部分,每个带宽部分覆盖至少一个子带。 UE从小区接收CRS和CSI-RS,基于CSI-RS确定至少一个带宽部分的信道反馈信息,向小区发送信道反馈信息,并接收基于小区的小区发送的数据 渠道反馈信息。