METHOD AND APPARATUS FOR FEEDBACK IN CLOSED LOOP TRANSMITTING
    3.
    发明申请
    METHOD AND APPARATUS FOR FEEDBACK IN CLOSED LOOP TRANSMITTING 审中-公开
    封闭环路发射反馈的方法与装置

    公开(公告)号:WO2008144189A4

    公开(公告)日:2009-03-12

    申请号:PCT/US2008062211

    申请日:2008-05-01

    Abstract: A method an apparatus is described for providing feedback for closed-loop transmitting with multiple transmit and receive antennas. The method includes a first step (900) of providing a codebook containing sets of weightings for each data stream of the multiple transmit antennas with each set identified by an index known to a transmitter and a receiver. The same codebook is utilized for any number of data streams up to the number of transmit antennas. A next step (902) includes measuring a composite channel between the transmitter and receiver. A next step (904) includes determining at least one performance metric for each set of weightings in the codebook. A next step (906) includes selecting preferred weightings for each data stream in response to the performance metrics. A next step (908) includes feeding back an index of the preferred weightings to the transmitter for use in subsequent transmissions.

    Abstract translation: 描述了一种用于提供用于具有多个发射和接收天线的闭环发射的反馈的装置的方法。 该方法包括第一步骤(900),其提供包含多个发射天线的每个数据流的加权集合的码本,其中每个集合由发射机和接收机已知的索引识别。 相同的码本被用于直到发射天线数量的任何数量的数据流。 下一步骤(902)包括测量发射机和接收机之间的复合信道。 下一步骤(904)包括为码本中的每个权重集合确定至少一个性能度量。 下一步骤(906)包括响应于性能度量为每个数据流选择优选权重。 下一步骤(908)包括将优先权重的索引反馈到发射机用于随后的传输。

    METHOD AND APPARATUS FOR FEEDBACK IN CLOSED LOOP TRANSMITTING
    6.
    发明申请
    METHOD AND APPARATUS FOR FEEDBACK IN CLOSED LOOP TRANSMITTING 审中-公开
    在闭环发射中反馈的方法和装置

    公开(公告)号:WO2008144189A3

    公开(公告)日:2009-01-22

    申请号:PCT/US2008062211

    申请日:2008-05-01

    Abstract: A method an apparatus is described for providing feedback for closed-loop transmitting with multiple transmit and receive antennas. The method includes a first step (900) of providing a codebook containing sets of weightings for each data stream of the multiple transmit antennas with each set identified by an index known to a transmitter and a receiver. The same codebook is utilized for any number of data streams up to the number of transmit antennas. A next step (902) includes measuring a composite channel between the transmitter and receiver. A next step (904) includes determining at least one performance metric for each set of weightings in the codebook. A next step (906) includes selecting preferred weightings for each data stream in response to the performance metrics. A next step (908) includes feeding back an index of the preferred weightings to the transmitter for use in subsequent transmissions.

    Abstract translation: 描述了一种用于提供用于使用多个发射天线和接收天线的闭环发射的反馈的设备的方法。 该方法包括提供包含多个发射天线中的每个数据流的权重集合的码本的第一步骤(900),其中每个集合由发射机和接收机已知的索引识别。 相同的码本用于任何数量的数据流直到发射天线的数量。 下一个步骤(902)包括测量发射机和接收机之间的复合信道。 下一个步骤(904)包括确定码本中每组权重的至少一个性能度量。 下一个步骤(906)包括响应于性能度量选择每个数据流的优选权重。 下一个步骤(908)包括将优选权重的索引反馈给发射机以用于后续传输。

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