利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

73 条记录 (耗时 0.014 秒)

    Method and apparatus for radio synchronization detection in a rake receiver
    2.
    发明授权
    Method and apparatus for radio synchronization detection in a rake receiver 有权

    公开(公告)号：EP2615742B1

    公开(公告)日：2018-12-05

    申请号：EP13150746.9

    申请日：2013-01-10

    申请人： Exelis Inc.

    发明人： Shi, Qun ,  Rose, Jonathan E. ,  Lu, Ning Hsing ,  Simmons, Charles A., Jr.

    IPC分类号： H04B1/7073 ,  H04B1/7075 ,  H04B1/7117

    CPC分类号： H04B1/70735 ,  H04B1/70755 ,  H04B1/7117

    摘要： Enhanced reception in a communication system is achieved by performing radio synchronization (SYNC) detection after multipath signal components are combined via a Rake combiner. In a communication system comprising a transmitter and a receiver, plural multipath signal components of a signal transmitted by the transmitter are received by the receiver. The plural multipath signal components are correlated with a known spreading code (e.g. a PN code). The correlated multipath signals are analyzed to identify plural correlation peaks and those correlation peaks that exceed a multipath threshold are selected. The selected correlation peaks are combined (i.e., coherently combined) to produce a combined signal. A synchronization event is declared when the combined signal exceeds an adjusted synchronization threshold and the combined signal is then decoded.

    MOBILE COMMUNICATION SYSTEM AND WIRELESS APPARATUS USED THEREIN
    7.
    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。

    SPREAD SPECTRUM RECEIVING APPARATUS
    9.
    发明公开
    SPREAD SPECTRUM RECEIVING APPARATUS 有权
    扩频接收机

    公开(公告)号：EP1191709A4

    公开(公告)日：2003-07-16

    申请号：EP01921922

    申请日：2001-04-19

    申请人： MITSUBISHI ELECTRIC CORP

    发明人： SANO HIROYASU

    IPC分类号： H04L27/14 ,  H04B1/7107 ,  H04B1/7117 ,  H04B1/712 ,  H04B7/02 ,  H04B7/08 ,  H04B7/10 ,  H04J13/00 ,  H04L7/00

    CPC分类号： H04B7/0897 ,  H04B1/7113 ,  H04B1/712

    摘要： A path detector unit (140) detects, from despread signals, a plurality of multipath waves that meet a predetermined criterion. A plurality of adder units (161) form beams path by path. A plurality of transmission path estimating units (170) and complex conjugate calculating units (163) calculate transmission path estimates, and then effect, on the basis of those estimates, a process of weighting according to the signal amplitudes and a process of eliminating phase variations. A plurality of interference amount estimating units (171) determine interference amounts. A plurality of normalizing units (172) normalize, on the basis of the interference amounts, the signals that have had their phase variations eliminated. An adder unit (185) combines all the normalized signals. A data discriminating unit (190) discriminates the combined signals.

    TIMING CORRECTING DEVICE AND TIMING CORRECTING METHOD
    10.
    发明公开
    TIMING CORRECTING DEVICE AND TIMING CORRECTING METHOD 有权
    设备和方法校正时间的交付

    公开(公告)号：EP1195914A4

    公开(公告)日：2003-03-19

    申请号：EP00940929

    申请日：2000-07-03

    申请人： MITSUBISHI ELECTRIC CORP

    发明人： AIKAWA HIDETO ,  SHIBUYA AKIHIRO

    IPC分类号： H04W56/00 ,  H04B1/707 ,  H04B1/7117 ,  H04L7/00 ,  H04L7/02

    CPC分类号： H04B1/7117

    摘要： In the timing correcting device, a RAKE path detecting circuit 1 detects a plurality of path candidates to be tracked, from a reception signal, and outputs a "timing of a path" and a "detection correlation value" corresponding to each path candidate, as a result of the detection. Next, each tracking-path candidate deciding circuit (2a, 2b, 2c, ...) generates a predetermined decision standard that is necessary for selecting an optimum path timing from timings of the path candidates, based on an individually allocated result of the detection. Further, the tracking-path selecting circuit 3 selects a timing of an optimum path to be tracked, based on the result of the detection and the predetermined decision standards. Then, a comparator circuit 5 compares a predetermined reception reference timing given from the outside with the optimum path timing, and calculates a phase difference between the two. Last, the timing correction control circuit 6 controls a clock based on the phase difference, thereby to correct the reception reference timing.