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    CDMA communication system in which interference removing capability is improved
    4.
    发明公开
    CDMA communication system in which interference removing capability is improved 失效
    在其中容量用于干扰消除改善CDMA通信系统

    公开(公告)号：EP0717520A3

    公开(公告)日：1998-09-09

    申请号：EP95119441

    申请日：1995-12-08

    申请人： NEC CORP

    发明人： YOSHIDA SHOUSEI ,  USHIROKAWA AKIHISA

    IPC分类号： H04J13/00 ,  H04B1/7103 ,  H04B14/00 ,  H04B1/707

    CPC分类号： H04J13/0003 ,  H04B1/7097

    摘要： There is provided a CDMA communication system in which the number of multiple user stations can be greatly increased under fast fading circumstances. In a transmitting apparatus, an M-ary digital modulator (4) modulates the m-bit (m ≧ 2 and m is an integer) binary digital signal into M-value symbols (M = 2
    m ) prior to the spreading operation by multipliers (6) and (8). In a receiving apparatus, after the despreading operation by an orthogonalizing filter (56), an M-ary digital demodulator (60) compensates the variation of the phase and amplitude of the carrier of the M-ary modulated signal. A decision circuit (62) decides the output of the M-ary digital demodulator (60). A tap coefficient control circuit (58) calculates orthogonal coefficients using the outputs of the subtractors (64) and (66), the outputs of the M-ary digital demodulator (60), the outputs of receiving filters (52) and (54), and the spreading code (93). The symbols outputted from the decision circuit (62) is converted into an m-bit signal and then combined into a signal of one sequence.

    MOBILE COMMUNICATION SYSTEM AND WIRELESS APPARATUS USED THEREIN
    6.
    发明公开
    MOBILE COMMUNICATION SYSTEM AND WIRELESS APPARATUS USED THEREIN 有权
    DARIN VERWENDETE DRAHTLOSE VORRICHTUNG的摩托车运动系

    公开(公告)号：EP1715596A4

    公开(公告)日：2012-04-18

    申请号：EP05709843

    申请日：2005-02-07

    申请人： NEC CORP

    发明人： MATSUMOTO MARIKO ,  YOSHIDA SHOUSEI

    IPC分类号： H04B1/707 ,  H04J13/00 ,  H04B1/10 ,  H04B1/7117 ,  H04B1/712 ,  H04B3/06 ,  H04B7/005 ,  H04B7/06 ,  H04B7/08 ,  H04B7/26 ,  H04L25/02 ,  H04L25/03 ,  H04W16/28 ,  H04W88/02 ,  H04W88/08

    CPC分类号： H04B1/71052 ,  H04B1/712 ,  H04B7/0613 ,  H04B7/0848 ,  H04L25/0202 ,  H04L2025/03375 ,  H04L2025/03477 ,  Y02D70/00 ,  Y02D70/1244 ,  Y02D70/40 ,  Y02D70/444

    摘要： A mobile communication system capable of improving the reception characteristic using a small circuit size and low power consumption is provided. The channel vector estimating section 181 estimates channel vectors in a method such as a method in which the section 181 multiplies, according to the multipath timings sent from the multipath timing detecting section, the input signal from the base-station receiving section by a complex conjugate of a known pilot signal to average the input signal (to average the input signal by de-spreading the pilot signal in the case of CDMA). The noise estimating section 182 estimates noise power using received signals and generates a Channel matrix by arranging the estimated channel vectors according to the multipath timings. The weight calculating section 184 calculates a weight matrix using the noise estimation value and the Channel matrix and sets the obtained filter weight vectors to the equalizing filter 185.

    摘要翻译： 提供了能够使用小电路尺寸和低功耗改善接收特性的移动通信系统。 信道矢量估计部分181以诸如方法的方法来估计信道矢量，其中部分181根据从多径定时检测部分发送的多径定时将来自基站接收部分的输入信号乘以复共轭 已知的导频信号来平均输入信号（通过在CDMA的情况下解扩导频信号来平均输入信号）。 噪声估计部分182使用接收信号估计噪声功率，并且通过根据多径定时排列估计的信道矢量来生成信道矩阵。 权重计算部184使用噪声估计值和信道矩阵来计算加权矩阵，并将获得的滤波器权重向量设置到均衡滤波器185。