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    • 53. 发明申请
    • METHOD AND APPARATUS FOR DOWNLINK BEAM FORMING IN TD-CDMA SYSTEM
    • TD-CDMA系统中下行链路波束形成的方法与装置
    • US20110003552A1
    • 2011-01-06
    • US12160396
    • 2007-01-09
    • Changguo SunYingmin WangNa Wu
    • Changguo SunYingmin WangNa Wu
    • H04B15/00
    • H04B7/0617H04B7/0452H04W16/28H04W48/16H04W72/082
    • The present invention discloses a method and an apparatus for downlink beam forming in a TD-CDMA system. The method includes: acquiring the spatial covariance matrixes of all uplink slot interference user signals and the downlink slots in which the interference user signals locate; obtaining the interference spatial covariance matrixes of each downlink slot based on the downlink slots in which the interference user signals locate and the spatial covariance matrixes of the interference user signals; determining the beam forming weight coefficient of downlink expected user signals based on the interference spatial covariance matrixes of each downlink slot and the spatial covariance matrixes of the downlink expected user signals; implementing beam forming based on the beam forming weight coefficient of downlink expected user signals. The invention determines the downlink slots in which all interference user signals locate and calculates the interference spatial covariance matrixes of all downlink slots, so that the beam forming weight coefficients of all downlink expected user signals are obtained to implement beam forming. Therefore, the beam forming method in the invention is feasible in the cases of both slot symmetry and slot asymmetry.
    • 本发明公开了一种在TD-CDMA系统中下行链路波束形成的方法和装置。 该方法包括:获取所有上行链路时隙干扰用户信号和干扰用户信号所在的下行链路时隙的空间协方差矩阵; 基于干扰用户信号定位的下行链路时隙和干扰用户信号的空间协方差矩阵,获得每个下行链路时隙的干扰空间协方差矩阵; 基于每个下行链路时隙的干扰空间协方差矩阵和下行链路预期用户信号的空间协方差矩阵,确定下行链路预期用户信号的波束形成权重系数; 基于下行链路预期用户信号的波束形成权重系数实现波束形成。 本发明确定所有干扰用户信号定位的下行链路时隙,并计算所有下行链路时隙的干扰空间协方差矩阵,从而获得所有下行链路预期用户信号的波束形成加权系数以实现波束形成。 因此,本发明中的波束形成方法在槽对称和槽不对称的情况下是可行的。