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    • 3. 发明申请
    • Methods and apparatus for characterizing noise in a wireless communications system
    • 在无线通信系统中表征噪声的方法和装置
    • US20080013500A1
    • 2008-01-17
    • US11486759
    • 2006-07-14
    • Rajiv LaroiaJohn FanJunyi Li
    • Rajiv LaroiaJohn FanJunyi Li
    • H04Q7/24
    • H04B7/2621H04B17/345H04L5/0023H04L5/0048H04W52/325
    • Improved pilot signal sequences which facilitate multiple channel quality measurements, e.g., through the use of different signal pilot transmission power levels, are described. In various implementations the transmitted pilot sequences facilitate determining the contribution of interference from other sectors of a cell using the same tones, e.g., in a synchronized manner, as the sector in which the pilot signal measurements are being made. To measure noise contributions from neighboring sectors a sector NULL pilot, e.g., a pilot with zero power, is transmitted in an adjacent sector at the same time a pilot signal with a pre-selected, and therefore known, non-zero power is transmitted in the sector where the received pilot signal measurement is made. To facilitate background noise measurements, a cell NULL is supported in some embodiments. In the case of a cell NULL, all sectors of a cell transmit a Null pilot, on a tone that is used to measure background noise. Since no power is transmitted in the cell on the tone during the measurement, any measured signal on the tone is attributable to noise, e.g., background noise which may include inter-cell interference.
    • 描述了促进多信道质量测量的改进的导频信号序列,例如通过使用不同的信号导频传输功率电平。 在各种实现中,所发送的导频序列有助于确定来自使用相同音调(例如以同步方式)的小区的其他扇区的干扰对作为其中进行导频信号测量的扇区的贡献。 为了测量来自相邻扇区的噪声贡献,在相邻扇区中同时传输具有零功率的扇区空导频(例如,功率为零的导频),具有预选择且因此已知的非零功率的导频信号被发送 进行接收导频信号测量的扇区。 为了便于背景噪声测量,在一些实施例中支持小区NULL。 在单元为NULL的情况下,单元的所有扇区以用于测量背景噪声的音调发送空导频。 由于在测量期间在音调上的单元中没有电力传输,音调上的任何测量信号都归因于噪声,例如可能包括小区间干扰的背景噪声。
    • 6. 发明授权
    • Transmission scheduler for a multiple antenna wireless cellular network
    • 用于多天线无线蜂窝网络的传输调度器
    • US06400699B1
    • 2002-06-04
    • US09660246
    • 2000-09-12
    • Manish AiryBaraa Al-DabaghJose TelladoPartho MishraJohn FanPeroor K. SebastianArogyaswami J. Paulraj
    • Manish AiryBaraa Al-DabaghJose TelladoPartho MishraJohn FanPeroor K. SebastianArogyaswami J. Paulraj
    • H04Q700
    • H04W72/1263H04B7/0613H04L5/0023H04L5/0044H04L5/0064
    • The invention includes an apparatus and method for scheduling wireless transmission of data blocks between at least one antenna of a base transceiver station and multiple subscriber units. The scheduling can be based on the quality of a transmission link between the base station antennas and the subscriber units, the amount of data requested by the subscriber units, and/or the type of data requested by the subscriber units. The scheduling generally includes assigning frequency blocks and time slots to each of the subscriber units for receiving or transmitting data blocks. The invention includes a method for transmitting data streams between a base transceiver station and a plurality of subscribers. The method includes receiving protocol data units from a network, creating sub-protocol data units from the protocol data units, and once per a frame of time, generating a schedule that designates time slots and pre-defined frequency blocks in which each one of the plurality of subscribers is to receive each of the sub-protocol data units from a plurality of base station transceiver antennas. The invention can further include transmitting the schedule to each of the subscribers, and the plurality of base station transceiver antennas transmitting the sub-protocol data units according to the schedule. The invention can further include selecting at least one transmission mode for each subscriber. The transmission mode dictating the type of modulation and/or coding used during transmission of the sub-protocol data units.
    • 本发明包括一种用于在基站收发台的至少一个天线和多个用户单元之间调度数据块的无线传输的装置和方法。 调度可以基于基站天线和用户单元之间的传输链路的质量,用户单元请求的数据量和/或用户单元请求的数据的类型。 调度通常包括向每个用户单元分配频率块和时隙以用于接收或发送数据块。 本发明包括一种在基站和多个用户之间传输数据流的方法。 该方法包括从网络接收协议数据单元,从协议数据单元创建子协议数据单元,并且每一帧一次生成指定时隙的调度和预定义的频率块,其中每个 多个用户将从多个基站收发天线接收每个子协议数据单元。 本发明还可以包括根据日程安排向每个用户以及多个基站收发天线发送该子协议数据单元。 本发明还可以包括为每个用户选择至少一个传输模式。 传输模式指示在子协议数据单元的传输期间使用的调制和/或编码的类型。