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    Frequency tracking device for a receiver of a multi-carrier communication system
    1.
    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。

    Method and device for providing timing information in a wireless communication system
    4.
    发明授权
    Method and device for providing timing information in a wireless communication system 有权
    用于在无线通信系统中提供定时信息的方法和装置

    公开(公告)号：US07327817B2

    公开(公告)日：2008-02-05

    申请号：US10751117

    申请日：2004-01-05

    申请人： Fabian Wenger ,  Uwe Dettmar ,  Udo Wachsmann ,  Peter Schramm

    发明人： Fabian Wenger ,  Uwe Dettmar ,  Udo Wachsmann ,  Peter Schramm

    IPC分类号： H04L7/00

    CPC分类号： H04L7/042 ,  H04L7/007 ,  H04L7/04 ,  H04L27/2613 ,  H04L27/2662 ,  H04W56/0085

    摘要： A method and a device of providing timing information within a wireless communication system is described. The timing information is extracted from a received transmit signal. The inventive method comprises the steps of providing a training signal on the receiver side relating to a known signal portion of the transmit signal, scaling the training signal, quantizing the scaled training signal, correlating one or more parts of the received transmit signal with the scaled training signal to obtain one or more correlation results, and determining the timing information on the basis of the correlation results.

    摘要翻译： 描述了在无线通信系统内提供定时信息的方法和装置。 从所接收的发送信号中提取定时信息。 本发明的方法包括以下步骤：在接收机侧提供与发射信号的已知信号部分相关的训练信号，缩放训练信号，量化缩放的训练信号，将接收的发射信号的一个或多个部分与缩放的 训练信号以获得一个或多个相关结果，以及基于相关结果确定定时信息。

    Method and device for providing timing information in a wireless communication system
    5.
    发明授权
    Method and device for providing timing information in a wireless communication system 有权
    用于在无线通信系统中提供定时信息的方法和装置

    公开(公告)号：US07729460B2

    公开(公告)日：2010-06-01

    申请号：US11955263

    申请日：2007-12-12

    申请人： Fabian Wenger ,  Uwe Dettmar ,  Udo Wachsmann ,  Peter Schramm

    发明人： Fabian Wenger ,  Uwe Dettmar ,  Udo Wachsmann ,  Peter Schramm

    IPC分类号： H04L7/00

    CPC分类号： H04L7/042 ,  H04L7/007 ,  H04L7/04 ,  H04L27/2613 ,  H04L27/2662 ,  H04W56/0085

    摘要： A method and a device of providing timing information within a wireless communication system is described. The timing information is extracted from a received transmit signal. The inventive method comprises the steps of providing a training signal on the receiver side relating to a known signal portion of the transmit signal, scaling the training signal, quantizing the scaled training signal, correlating one or more parts of the received transmit signal with the scaled training signal to obtain one or more correlation results, and determining the timing information on the basis of the correlation results.

    摘要翻译： 描述了在无线通信系统内提供定时信息的方法和装置。 从所接收的发送信号中提取定时信息。 本发明的方法包括以下步骤：在接收机侧提供与发射信号的已知信号部分相关的训练信号，缩放训练信号，量化缩放的训练信号，将接收的发射信号的一个或多个部分与缩放的 训练信号以获得一个或多个相关结果，以及基于相关结果确定定时信息。

    METHOD AND DEVICE FOR PROVIDING TIMING INFORMATION IN A WIRELESS COMMUNICATION SYSTEM
    6.
    发明申请
    METHOD AND DEVICE FOR PROVIDING TIMING INFORMATION IN A WIRELESS COMMUNICATION SYSTEM 有权
    用于在无线通信系统中提供时序信息的方法和装置

    公开(公告)号：US20090034667A1

    公开(公告)日：2009-02-05

    申请号：US11955238

    申请日：2007-12-12

    申请人： Fabian WENGER ,  Uwe Dettmar ,  Udo Wachsmann ,  Peter Schramm

    发明人： Fabian WENGER ,  Uwe Dettmar ,  Udo Wachsmann ,  Peter Schramm

    IPC分类号： H04L7/00

    CPC分类号： H04L7/042 ,  H04L7/007 ,  H04L7/04 ,  H04L27/2613 ,  H04L27/2662 ,  H04W56/0085

    摘要： A method and a device of providing timing information within a wireless communication system is described. The timing information is extracted from a received transmit signal. The inventive method comprises the steps of providing a training signal on the receiver side relating to a known signal portion of the transmit signal, scaling the training signal, quantizing the scaled training signal, correlating one or more parts of the received transmit signal with the scaled training signal to obtain one or more correlation results, and determining the timing information on the basis of the correlation results.

    摘要翻译： 描述了在无线通信系统内提供定时信息的方法和装置。 从所接收的发送信号中提取定时信息。 本发明的方法包括以下步骤：在接收机侧提供与发射信号的已知信号部分相关的训练信号，缩放训练信号，量化缩放的训练信号，将接收的发射信号的一个或多个部分与缩放的 训练信号以获得一个或多个相关结果，以及基于相关结果确定定时信息。

    Precoding technique
    8.
    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
    9.
    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
    10.
    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。