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    • 4. 发明申请
    • CHANNEL FEEDBACK BASED ON REFERENCE SIGNAL
    • 基于参考信号的通道反馈
    • WO2011088403A1
    • 2011-07-21
    • PCT/US2011/021409
    • 2011-01-14
    • QUALCOMM INCORPORATEDCHEN, WanshiBHATTAD, KapilGAAL, PeterGOROKHOV, Alexei, YurievitchMONTOJO, Juan
    • CHEN, WanshiBHATTAD, KapilGAAL, PeterGOROKHOV, Alexei, YurievitchMONTOJO, Juan
    • H04L1/00
    • 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。
    • 8. 发明申请
    • OPEN LOOP CHANNEL REPORTING IN A WIRELESS COMMUNICATION SYSTEM
    • 无线通信系统中的开环通道报告
    • WO2011008519A1
    • 2011-01-20
    • PCT/US2010/040308
    • 2010-06-29
    • QUALCOMM INCORPORATEDGOROKHOV, Alexei, Y.GAAL, Peter
    • GOROKHOV, Alexei, Y.GAAL, Peter
    • H04L1/00H04L1/06
    • H04L1/0026H04L1/0035H04L1/0631H04L2025/03426
    • Techniques for reporting channel quality indicator (CQI) in a wireless communication system are described. In one design, a UE determines CQI based on an assumption of a set of precoding matrices being used by a base station for data transmission to the UE. The base station may or may not actually use the set of precoding matrices assumed by the UE. The UE sends the CQI to the base station and thereafter receives data transmission sent by the base station based on the CQI. In one design, the UE determines the set of precoding matrices for a set of time-frequency resources available for data transmission to the UE. The UE determines the received signal quality of each time-frequency resource based on a precoding matrix for that time-frequency resource. The UE then determines the CQI based on the received signal qualities of the set of time-frequency resources.
    • 描述用于在无线通信系统中报告信道质量指示符(CQI)的技术。 在一种设计中,UE基于由基站用于向UE的数据传输使用的一组预编码矩阵的假设来确定CQI。 基站可以实际使用或不实际使用由UE假设的一组预编码矩阵。 UE将CQI发送到基站,然后基于CQI接收基站发送的数据发送。 在一种设计中,UE确定可用于向UE传输数据的一组时频资源的预编码矩阵集合。 UE基于该时频资源的预编码矩阵来确定每个时频资源的接收信号质量。 然后,UE基于该组时间 - 频率资源的接收信号质量来确定CQI。