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    • 54. 发明授权
    • Scalable quantization of channel state information for MIMO transmission
    • 用于MIMO传输的信道状态信息的可扩展量化
    • US08781005B2
    • 2014-07-15
    • US12893610
    • 2010-09-29
    • Siddhartha MallikAlexei Yurievitch GorokhovWooseok Nam
    • Siddhartha MallikAlexei Yurievitch GorokhovWooseok Nam
    • H04L27/00
    • H04B7/0626H04B7/024H04B7/0639H04B7/0645H04B7/0658
    • Techniques for reporting channel state information (CSI) are described. A user equipment (UE) may receive data transmission from one or more cells among a plurality of cells and may report CSI for each of the plurality of cells. In an aspect, the UE may generate CSI with different quantization granularity (e.g., different codebook sizes), or different frequency granularity (e.g., different subband sizes), and/or different time granularity (e.g., different reporting intervals) for different cells based on the performance impact of each cell for data transmission to the UE. The performance impact of each cell may be determined based on a long-term channel gain or received power of the cell at the UE. The UE may quantize the CSI for each cell based on the codebook size for the cell. The UE may generate the CSI for each cell based on the subband size and/or the reporting interval for the cell.
    • 描述用于报告信道状态信息(CSI)的技术。 用户设备(UE)可以从多个小区中的一个或多个小区接收数据传输,并且可以为多个小区中的每个小区报告CSI。 在一方面,UE可以以不同的基于小区的不同的量化粒度(例如,不同的码本大小)或不同的频率粒度(例如,不同的子带大小)和/或不同的时间粒度(例如,不同的报告间隔)生成CSI 关于每个小区对UE的数据传输的性能影响。 可以基于UE处的小区的长期信道增益或接收功率来确定每个小区的性能影响。 UE可以基于小区的码本大小量化每个小区的CSI。 UE可以基于小区的子带大小和/或报告间隔来生成每个小区的CSI。
    • 57. 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。