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    System and method for testing a communcation device with an offline uplink fader
    6.
    发明公开
    System and method for testing a communcation device with an offline uplink fader 有权
    系统和方法，一种用于测试通信设备与离线上行推子

    公开(公告)号：EP2262134A3

    公开(公告)日：2013-10-30

    申请号：EP10000587.5

    申请日：2010-01-21

    申请人： Rohde & Schwarz GmbH & Co. KG

    发明人： Haase, Heiko, Dr.

    IPC分类号： H04B17/00

    CPC分类号： H04B17/0087 ,  H04B17/17 ,  H04B17/3911

    摘要： The invention regards a system, a method and a program for testing a mobile communication device (4) with an offline uplink fader and uplink scheduler. The inventive offline uplink fader and scheduler (3) for a communication tester (2) gets a fading profile and converts the fading profile into data containing the RF channel properties and provides this data to an uplink scheduler (8) for generating the uplink scheduling information. The uplink scheduling information is then stored. For testing a mobile communication device (4) the stored test signal is reproduced and transmitted via an interface (11) to the device under test (4), which responds by scheduling the uplink accordingly. The communication tester (2) receives the uplink signals sent by the device under test (4) and evaluates the received signal with respect to the uplink scheduling information.

    METHOD AND APPARATUS FOR MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) DOWNLINK TRANSMISSION CONTROL
    8.
    发明公开
    METHOD AND APPARATUS FOR MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) DOWNLINK TRANSMISSION CONTROL 有权
    VERFAHREN UND VORRICHTUNG ZUR STEUERUNG VON MIMO-DOWNLINK-ÜBERTRAGUNGEN

    公开(公告)号：EP2416502A1

    公开(公告)日：2012-02-08

    申请号：EP10766627.3

    申请日：2010-04-20

    申请人： Huawei Technologies Co., Ltd.

    发明人： ZHANG, Gong ,  LONG, Yi ,  HUANG, Kaibin ,  CHENG, Yong ,  LIU, Jianneng

    IPC分类号： H04B7/04

    CPC分类号： H04B7/0413 ,  H04B7/0689 ,  H04B17/3911

    摘要： A Multi-Input Multi-Output (MIMO) downlink transmission control method that is related to communications technologies is disclosed in embodiments of the present invention. The method includes: obtaining a channel fading change rate and a feedback delay of a user; calculating out a closed-loop MIMO throughput gain according to the channel fading change rate and the feedback delay; and determining a downlink transmission mode according to the closed-loop MIMO throughput gain, wherein the downlink transmission mode includes a closed-loop mode or an open-loop mode. A MIMO downlink transmission control apparatus is also disclosed. In the embodiments of the present invention, a downlink transmission mode is selected according to the channel fading change rate (namely, mobility) and the feedback delay of the user, and therefore, different operation modes (an open-loop mode and a closed-loop mode) are supported simultaneously to facilitate multi-user joint transmission, and the downlink throughput is increased by using mobility difference between users.

    摘要翻译： 在本发明的实施例中公开了与通信技术相关的多输入多输出（MIMO）下行链路传输控制方法。 该方法包括：获得用户的信道衰落变化率和反馈延迟; 根据信道衰落变化率和反馈延迟计算闭环MIMO吞吐量增益; 以及根据所述闭环MIMO吞吐量增益确定下行链路传输模式，其中所述下行链路传输模式包括闭环模式或开环模式。 还公开了MIMO下行链路传输控制装置。 在本发明的实施例中，根据信道衰落变化率（即，移动性）和用户的反馈延迟来选择下行链路传输模式，因此，不同的操作模式（开环模式和闭路模式） 环路模式）同时支持，以便于多用户联合传输，并且通过使用用户之间的移动性差异来增加下行链路吞吐量。

    OFDM receiving method and apparatus
    9.
    发明公开
    OFDM receiving method and apparatus 有权
    艾菲尔铁克爱普生

    公开(公告)号：EP1750410A1

    公开(公告)日：2007-02-07

    申请号：EP06021130.7

    申请日：2002-04-05

    申请人： FUJITSU LIMITED

    发明人： Yoshida, Makoto ,  Tanaka, Yoshinori

    IPC分类号： H04L27/26 ,  H04B7/08

    CPC分类号： H04L27/2647 ,  H04B7/0814 ,  H04B7/086 ,  H04B7/088 ,  H04B17/3911

    摘要： In order to improve upon a degradation in performance due to inter-carrier interference without loss of transmission efficiency, antennas (11 1 to 11 4 ) provided on a mobile body are made directional antennas. An antenna selection unit (15) selects a directional antenna in such a manner that Doppler shift that is caused by movement of the mobile body will keep a constant sign that is positive or negative, a fading-variation calculation unit (18) calculates the average value of fading variation on each path of a multipath environment, and a fading-variation compensation unit (19) compensates the multipath fading variation based upon the average value.

    摘要翻译： 为了在不损失传输效率的情况下改善由于载波间干扰导致的性能下降，在移动体上设置的天线（11 1〜11 4）是定向天线。 天线选择单元（15）选择定向天线，使得由移动体的移动引起的多普勒频移将保持正或负的恒定符号，衰落变化计算单元（18）计算平均值 衰落变化补偿单元（19）根据平均值补偿多路径衰减变化。

    FADING FREQUENCY ESTIMATION APPARATUS
    10.
    发明公开
    FADING FREQUENCY ESTIMATION APPARATUS 有权
    褪色FREQUENZSCHÄTZVORRICHTUNG

    公开(公告)号：EP1589681A1

    公开(公告)日：2005-10-26

    申请号：EP03815585.9

    申请日：2003-01-30

    申请人： FUJITSU LIMITED

    发明人： MIYAZAKI, Shunji, c/o Fujitsu Limited

    IPC分类号： H04B17/00 ,  H04L27/00

    CPC分类号： H04B17/3911 ,  H04B17/309

    摘要： The invention relates to a fading frequency estimating apparatus that performs a predetermined signal processing on a radio frequency signal that arrives through a radio transmission channel, to estimate a frequency of fading occurring on the radio transmission channel. An object of the present invention is to quickly and accurately estimate a fading frequency without need to use a very complicated structure. The fading frequency estimating apparatus includes a frequency analyzing section obtaining at two instances a frequency spectrum of a sequence of differences in instantaneous values of envelop of signals that chronologically arrive through the radio transmission channel, the two instances apart from each other with an interval necessary for a characteristic of the radio transmission channel to be steady, and it includes an estimating section estimating a frequency of fading to be such a frequency that the magnitude of the frequency spectrum is to be maximum.

    摘要翻译： 本发明涉及对通过无线电传输信道到达的射频信号执行预定信号处理以估计在无线电传输信道上发生的衰落频率的衰落频率估计装置。 本发明的目的是快速且准确地估计衰落频率，而不需要使用非常复杂的结构。 衰落频率估计装置包括频率分析部分，在两个实例处获得通过无线电传输信道按时间顺序到达的信号的包络的瞬时值的差异序列的频谱，两个实例彼此间隔，间隔为 无线电传输信道的特性是稳定的，并且其包括将衰落频率估计为频谱幅度最大的频率的估计部分。