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    Precoding technique
    11.
    发明授权
    Precoding technique 有权
    预编码技术

    公开(公告)号：US08787493B2

    公开(公告)日：2014-07-22

    申请号：US13817604

    申请日：2011-08-12

    申请人： Eckhard Ohlmer ,  Udo Wachsmann

    发明人： Eckhard Ohlmer ,  Udo Wachsmann

    IPC分类号： H04L25/49

    CPC分类号： H04L1/0042 ,  H04B7/0417 ,  H04B7/0465 ,  H04B7/063 ,  H04B7/0634

    摘要： A technique for precoding a signal to be transmitted over a physical channel from a sender to a receiver is provided. A method includes receiving precoding information and applying precoding matrix at the sender based on the precoding information. The precoding information is received via a feedback mechanism from the receiver. The application of the precoding matrix results in a precoded signal for transmission over the physical channel. The precoding matrix enhances mutual information at the receiver.

    摘要翻译： 提供了一种用于对通过物理信道从发送方发送到接收方的信号进行预编码的技术。 一种方法包括基于预编码信息接收预编码信息并在发送方应用预编码矩阵。 经由来自接收机的反馈机制接收预编码信息。 预编码矩阵的应用导致用于在物理信道上传输的预编码信号。 预编码矩阵增强了接收机的互信息。

    Precoding Technique
    12.
    发明申请
    Precoding Technique 有权
    预编码技术

    公开(公告)号：US20130188751A1

    公开(公告)日：2013-07-25

    申请号：US13817604

    申请日：2011-08-12

    申请人： Eckhard Ohlmer ,  Udo Wachsmann

    发明人： Eckhard Ohlmer ,  Udo Wachsmann

    IPC分类号： H04L1/00

    CPC分类号： H04L1/0042 ,  H04B7/0417 ,  H04B7/0465 ,  H04B7/063 ,  H04B7/0634

    摘要： A technique for precoding a signal to be transmitted over a physical channel (102; 206) from a sender to a receiver is provided. As to a method aspect, a method (100) comprises the steps of receiving (104) precoding information and applying (108) a precoding matrix (W) at the sender based on the precoding information. The precoding information is received via a feedback mechanism from the receiver. The application results in a precoded signal (216, 218) for transmission over the physical channel (102; 206). The precoding matrix (W) enhances mutual information (I) at the receiver.

    摘要翻译： 提供了一种用于对通过物理信道（102; 206）从发送方发送到接收方的信号进行预编码的技术。 对于方法方面，方法（100）包括以下步骤：基于预编码信息接收（104）预编码信息并在发送器处应用（108）预编码矩阵（W）。 经由来自接收机的反馈机制接收预编码信息。 应用程序产生用于通过物理信道（102; 206）传输的预编码信号（216,218）。 预编码矩阵（W）增强了接收机处的互信息（I）。

    Technique For Soft Bit Scaling
    13.
    发明申请
    Technique For Soft Bit Scaling 有权
    软比例缩放技术

    公开(公告)号：US20100309810A1

    公开(公告)日：2010-12-09

    申请号：US12867249

    申请日：2009-02-09

    申请人： Udo Wachsmann

    发明人： Udo Wachsmann

    IPC分类号： H04J3/14 ,  H04L1/18 ,  G06F11/14

    CPC分类号： H04L25/067 ,  H04L1/0045 ,  H04L1/0066 ,  H04L1/1812

    摘要： A technique for determining in a fading channel environment a scaling factor for soft bit quantization is proposed. In a method realisation, the technique includes repeatedly determining an SNR value for the fading channel, calculating a weighted average based on a plurality of the SNR values, wherein weighting is performed such that contributions of extremal SNR values are attenuated, and determining the scaling factor for soft bit quantization dependent on the weighted average.

    摘要翻译： 提出了一种用于在衰落信道环境中确定用于软比特量化的缩放因子的技术。 在方法实现中，该技术包括重复地确定衰落信道的SNR值，基于多个SNR值来计算加权平均值，其中执行加权，使得极值SNR值的贡献被衰减，并且确定缩放因子 用于取决于加权平均值的软位量化。

    Cellular radio network reusing frequencies
    14.
    发明授权
    Cellular radio network reusing frequencies 有权
    蜂窝无线网络重用频率

    公开(公告)号：US07366517B2

    公开(公告)日：2008-04-29

    申请号：US11492916

    申请日：2006-07-26

    申请人： Ralf Keller ,  Ralf Tonjes ,  Wolfgang Stahl ,  Jörn Thielecke ,  Jörg Huschke ,  Udo Wachsmann

    发明人： Ralf Keller ,  Ralf Tonjes ,  Wolfgang Stahl ,  Jörn Thielecke ,  Jörg Huschke ,  Udo Wachsmann

    IPC分类号： H04Q7/20

    CPC分类号： H04W16/14 ,  H04W16/02 ,  H04W16/32

    摘要： Method of arranging a cellular radio network in a geographical area which is already covered by an existing cellular radio network, wherein cell clusters of the cellular radio network to be introduced and using a specific transmission frequency are located in areas determined by connecting at least two cells of the existing cellular radio network using the specific transmission frequency, and wherein the cell clusters are arranged such that they do not overlap with the cells of the existing cellular radio network. The cell clusters of the introduced cellular radio network may be adjusted by reducing the cell size of cell clusters of the introduced cellular radio network, and by introducing new cells into cell clusters of the introduced cellular radio network. The invention allows to reuse frequencies of an existing cellular radio network by an introduced cellular radio network in the same geographical area.

    摘要翻译： 在已经被现有的蜂窝无线电网络覆盖的地理区域中布置蜂窝无线电网络的方法，其中要引入并使用特定传输频率的蜂窝无线电网络的小区集群位于通过连接至少两个小区 使用特定传输频率的现有蜂窝无线电网络，并且其中小区群集被布置为使得它们不与现有蜂窝无线电网络的小区重叠。 引入的蜂窝无线电网络的小区群可以通过减小引入的蜂窝无线电网络的小区簇的小区大小，并且通过将新小区引入到所引入的蜂窝无线电网络的小区簇中来进行调整。 本发明允许在相同地理区域中由引入的蜂窝无线电网络重用现有蜂窝无线电网络的频率。

    Technique for soft bit scaling
    16.
    发明授权
    Technique for soft bit scaling 有权
    软比特缩放技术

    公开(公告)号：US08553546B2

    公开(公告)日：2013-10-08

    申请号：US12867249

    申请日：2009-02-09

    申请人： Udo Wachsmann

    发明人： Udo Wachsmann

    IPC分类号： H04J1/16

    CPC分类号： H04L25/067 ,  H04L1/0045 ,  H04L1/0066 ,  H04L1/1812

    摘要： A technique for determining in a fading channel environment a scaling factor for soft bit quantization is proposed. In a method realisation, the technique includes repeatedly determining an SNR value for the fading channel, calculating a weighted average based on a plurality of the SNR values, wherein weighting is performed such that contributions of extremal SNR values are attenuated, and determining the scaling factor for soft bit quantization dependent on the weighted average.

    摘要翻译： 提出了一种用于在衰落信道环境中确定用于软比特量化的缩放因子的技术。 在方法实现中，该技术包括重复地确定衰落信道的SNR值，基于多个SNR值来计算加权平均值，其中执行加权，使得极值SNR值的贡献被衰减，并且确定缩放因子 用于取决于加权平均值的软位量化。

    Link adaptation for MIMO transmission schemes
    18.
    发明授权
    Link adaptation for MIMO transmission schemes 有权

    公开(公告)号：US07120199B2

    公开(公告)日：2006-10-10

    申请号：US10137701

    申请日：2002-05-03

    申请人： Jörn Thielecke ,  Udo Wachsmann

    发明人： Jörn Thielecke ,  Udo Wachsmann

    IPC分类号： H04B7/02

    CPC分类号： H04W52/42 ,  H04B7/0417 ,  H04B7/0443 ,  H04B7/0613 ,  H04B7/0632 ,  H04B7/0837 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0656 ,  H04L1/12 ,  H04L5/0046 ,  H04L25/0208 ,  H04L25/0248 ,  H04W24/00 ,  H04W28/06 ,  H04W28/18

    摘要： MIMO transmission methods are applied to communicaiton systems in which a transmitter has more than one transmit antenna and a receiver has more than one receive antenna. Information to be transmitted is divided into a plurality of subsignals according to the number of used transmit antennas and each subsignal is processed separately before it is emitted by the respective transmit antenna. In the receiver the different receive signals are processed thus that subsignals are detected and decoded and the contribution of each detected and decoded subsignal is subtracted from the receive signals and whereby a feedback channel from receiver to transmitter is used to send control information to the transmitter depending on the receive situation. In order to optimize the usage of the MIMO channel the invention proposes the in the receiver the link quality of each subsignal is determined and information of each subsignal is transmitted to the receiver via the feedback channel and that in the transmitter properties of the subsignals are controlled by the link quality information.

    Frequency tracking device for a receiver of a multi-carrier communication system
    19.
    发明授权
    Frequency tracking device for a receiver of a multi-carrier communication system 有权
    用于多载波通信系统的接收机的频率跟踪装置

    公开(公告)号：US07009932B2

    公开(公告)日：2006-03-07

    申请号：US09867711

    申请日：2001-05-31

    申请人： Kirsten Matheus ,  Udo Wachsmann ,  Uwe Dettmar

    发明人： Kirsten Matheus ,  Udo Wachsmann ,  Uwe Dettmar

    IPC分类号： H04L11/00

    CPC分类号： H04L27/2657 ,  H04L27/2695

    摘要： A frequency tracking device (FTD) in particular for use in a OFDM communication system comprises a selector (SEL) which selects on the basis of N channel coefficients (Cest) a number M of subcarriers corresponding to the M channel coefficients (Cest) having the largest absolute values. An evaluator (EVAL) of the frequency tracking device (FTD) determines a frequency deviation estimate (foff,est) on the basis of the selected M subcarriers and the selected M channel coefficients. In addition to or instead of a feedback correction unit (CORR1) provided upstream of a multi-carrier filter bank (8; FFT), the frequency tracking device (FTD) can also comprise a feed forward correction unit (CORR2) provided downstream of the receiver multi-carrier filter bank (8). In this case the selector (SEL) and the feed forward correction unit (CORR2) operate on the same data symbols such that the correction unit (CORR2) corrects the same data symbols which are subject to the selection and evaluation process in the selector (SEL) and the evaluator (EVAL). Based on the selection and evaluation processes frequency deviations (foff) which are introduced into multi-carrier symbols when being transmitted between a transmitter multi-carrier filter bank (4; IFFT) and a receiver multi-carrier filter bank (8; FFT) can be corrected more efficiently, e.g. with a reduced computational complexity.

    摘要翻译： 特别是在OFDM通信系统中使用的频率跟踪装置（FTD）包括一个选择器（SEL），它根据N个信道系数（C＆gt; est＆lt; / SUB）选择M个对应于 具有最大绝对值的M个通道系数（C ）。 频率跟踪装置（FTD）的评估器（EVAL）基于所选择的M个子载波和所选择的M个信道系数来确定频率偏差估计（f off，估计）。 除了或代替设置在多载波滤波器组（8; FFT）上游的反馈校正单元（CORR 1）之外，频率跟踪装置（FTD）还可以包括提供在下游的前馈校正单元（CORR 2） 的接收机多载波滤波器组（8）。 在这种情况下，选择器（SEL）和前馈校正单元（CORR 2）在相同的数据符号上操作，使得校正单元（CORR 2）校正在选择器中进行选择和评估处理的相同数据符号 （SEL）和评估者（EVAL）。 基于在发射机多载波滤波器组（4; IFFT）和接收机多载波之间传输时被引入到多载波符号中的选择和评估处理频率偏差（f OFF） 可以更有效地校正滤波器组（8; FFT），例如 降低计算复杂度。