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    • 46. 发明申请
    • Methods and Systems for Providing Feedback for Beamforming and Power Control
    • 提供波束形成和功率控制反馈的方法和系统
    • US20110069774A1
    • 2011-03-24
    • US12665684
    • 2008-06-19
    • Xiaodong WangFilippo Zuccardi Merli
    • Xiaodong WangFilippo Zuccardi Merli
    • H04B7/02
    • H04W52/248H04B7/0417H04B7/0634H04L1/0025H04L5/0023H04L5/006H04L25/022H04L25/0224H04L25/0242H04L27/2624H04W52/247H04W52/42
    • Methods and systems for providing feedback for beamforming and power control are provided. In some embodiments, the methods comprise: calculating a threshold associated with a subcarrier; receiving the subcarrier containing an information symbol at the receiver; determining a channel estimate of the subcarrier and a weighting vector for the information symbol; based at least on the channel estimate and the weighting vector, determining a power level of the subcarrier; comparing the power level to the threshold; generating a feedback signal indicating a first energy level to be used for the subcarrier based on the comparison; subsequent to generating the feedback signal, determining a second power level of the subcarrier; comparing the second power level to the threshold; and generating a second feedback signal to the transmitter indicating a second energy level to be used for the subcarrier.
    • 提供了用于提供波束形成和功率控制的反馈的方法和系统。 在一些实施例中,所述方法包括:计算与子载波相关联的阈值; 在接收机处接收包含信息符号的子载波; 确定所述子载波的信道估计和所述信息符号的加权向量; 至少基于信道估计和加权矢量,确定子载波的功率电平; 将功率电平与阈值进行比较; 基于所述比较,生成指示要用于所述子载波的第一能级的反馈信号; 在产生所述反馈信号之后,确定所述子载波的第二功率电平; 将第二功率电平与阈值进行比较; 以及向所述发射机生成指示要用于所述副载波的第二能级的第二反馈信号。