公开(公告)号：US07324599B2

公开(公告)日：2008-01-29

申请号：US10751120

申请日：2004-01-05

申请人： Georg Frank ,  Mathias Pauli ,  Udo Wachsmann ,  Peter Schramm

发明人： Georg Frank ,  Mathias Pauli ,  Udo Wachsmann ,  Peter Schramm

IPC分类号： H04K1/10

CPC分类号： H04L27/2657 ,  H04L27/2679

摘要： In order to correct frequency deviations of signals in a multicarrier system, such as a OFDM-system, the present invention provides a frequency tracker and a method to operate the same. The frequency tracker is based on a decision directed digital phase locked loop exhibiting a predictive character. On the basis of an estimated phase offset for a received signal (signal component, signal symbol) a predicted phase offset is calculated and applied to the signal (signal component, signal symbol). Further, received signals (signal components, signal symbols) are sampled and for each sample a sample phase offset to be corrected is calculated in dependence to the related estimated phase offset to incorporate the predictive character. In particular, the predicted sample phase offsets are calculated as a function of a corresponding predicted phase offset and a measure being indicative of a distance, in the time domain, between a corresponding phase reference point for the predicted phase offset and a phase reference point defined for a specific part of the received signal, preferably for a preceding preamble signal.

摘要翻译： 为了校正诸如OFDM系统的多载波系统中的信号的频率偏差，本发明提供一种频率跟踪器及其操作方法。 频率跟踪器基于呈现预测字符的决策指向的数字锁相环。 基于接收信号（信号分量，信号符号）的估计相位偏移，计算预测相位偏移并将其施加到信号（信号分量，信号符号）。 此外，接收到的信号（信号分量，信号符号）被采样，并且对于每个采样，根据相关的估计相位偏移来计算要校正的采样相位偏移以并入预测字符。 特别地，预测的采样相位偏移作为相应的预测相位偏移的函数计算，并且指示在时域中在预测相位偏移的相应相位参考点和定义的相位参考点之间的距离的度量 对于接收信号的特定部分，优选地用于前一个前导信号。

公开(公告)号：US20070225002A1

公开(公告)日：2007-09-27

申请号：US11798560

申请日：2007-05-15

申请人： Ralf Keller ,  Ralf Tonjes ,  Wolfgang Stahl ,  Jorn Thielecke ,  Jorg Huschke ,  Udo Wachsmann

发明人： Ralf Keller ,  Ralf Tonjes ,  Wolfgang Stahl ,  Jorn Thielecke ,  Jorg 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.

公开(公告)号：US20070042778A1

公开(公告)日：2007-02-22

申请号：US11492916

申请日：2006-07-26

申请人： Ralf Keller ,  Ralf Tonjes ,  Wolfgang Stahl ,  Jorn Thielecke ,  Jorg Huschke ,  Udo Wachsmann

发明人： Ralf Keller ,  Ralf Tonjes ,  Wolfgang Stahl ,  Jorn Thielecke ,  Jorg 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。

公开(公告)号：US08929488B2

公开(公告)日：2015-01-06

申请号：US13695982

申请日：2010-05-06

申请人： Stefan Müller-Weinfurtner ,  Toni Brkic ,  Udo Wachsmann

发明人： Stefan Müller-Weinfurtner ,  Toni Brkic ,  Udo Wachsmann

IPC分类号： H04L27/06 ,  H04L1/00 ,  H03M13/29 ,  H03M13/37 ,  H03M13/41 ,  H03M13/00 ,  H03M13/09 ,  H03M13/23

CPC分类号： H04L1/0054 ,  H03M13/09 ,  H03M13/23 ,  H03M13/2933 ,  H03M13/3738 ,  H03M13/413 ,  H03M13/4169 ,  H03M13/6525

摘要： A technique for processing information in a wireless communication network is described. In a method in accordance with the technique, a signal encoded with a convolution code is received. The encoded signal comprises information and a check value. The encoded signal is decoded using a Viterbi algorithm to derive the information and the check value. The decoding includes computing a Viterbi state metric. A reliability parameter is then determined based on the Viterbi state metric. The information is selectively processed depending on both the check value and the reliability parameter.

摘要翻译： 描述了一种在无线通信网络中处理信息的技术。 在根据该技术的方法中，接收利用卷积码编码的信号。 编码信号包括信息和检查值。 使用维特比算法对编码信号进行解码以导出信息和检查值。 解码包括计算维特比状态度量。 然后，基于维特比状态度量来确定可靠性参数。 根据检查值和可靠性参数，选择性地处理信息。

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。

公开(公告)号：US07324600B2

公开(公告)日：2008-01-29

申请号：US10774702

申请日：2004-02-10

申请人： Mathias Pauli ,  Udo Wachsmann

发明人： Mathias Pauli ,  Udo Wachsmann

IPC分类号： H04L27/28

CPC分类号： H04L25/0204 ,  H04L1/0618 ,  H04L5/0023 ,  H04L5/0048 ,  H04L27/2662

摘要： A method and a stage for estimating channel coefficients in a multi carrier system operating in accordance with a block-code based transmit diversity scheme, in which a data content of a code matrix is multiplexed in a frequency domain are described. The method comprises determining a phase ramp in the frequency domain or an equivalent thereof in the time domain, the phase ramp or the equivalent thereof being comprised within a receive signal after timing synchronization, processing the receive signal to remove the phase ramp or the equivalent thereof and estimating the channel coefficients on the basis of the processed receive signal.

摘要翻译： 描述了一种用于估计在根据基于块码的发射分集方案操作的多载波系统中的信道系数的方法和级，其中码矩阵的数据内容在频域中被复用。 该方法包括在定时同步之后确定频域中的相位斜坡或其等效线，相位斜坡或其等效线包括在定时同步之后的接收信号中，处理接收信号以去除相位斜坡或其等效物 以及基于所处理的接收信号来估计信道系数。

公开(公告)号：US06553540B1

公开(公告)日：2003-04-22

申请号：US09397512

申请日：1999-09-17

申请人： Peter Schramm ,  Udo Wachsmann

发明人： Peter Schramm ,  Udo Wachsmann

IPC分类号： H03M1303

CPC分类号： H04L1/0059 ,  H04L27/2602

摘要： In wireless telecommunications systems, such as wireless local area networks, a flexible, less complex, and bandwidth efficient forward error correction method can be achieved by applying a first convolutional coding scheme to the bits in a first portion of a data block and a second convolutional coding scheme to the bits in a second portion of the data block, wherein the second portion of the data block may encompass a remaining portion of the data block, excluding the first portion, or the entire data block, including the first portion. While the first coding scheme employs a first code rate, the second coding scheme employs a second code rate that is higher than the first code rate. The higher rate makes it possible to incorporate the one or more tail bits into the second portion of the data block, and therefore, avoid generating any additional symbols, such as orthogonal frequency division multiplexing symbols, to exclusively modulate the tail bits.

摘要翻译： 在诸如无线局域网的无线电信系统中，可以通过对数据块的第一部分中的比特应用第一卷积编码方案和第二卷积编码方案来实现灵活的，较不复杂的和带宽有效的前向纠错方法 编码方案到数据块的第二部分中的位，其中数据块的第二部分可以包括数据块的剩余部分，不包括第一部分或包括第一部分的整个数据块。 虽然第一编码方案采用第一码率，但是第二编码方案采用比第一码率高的第二码率。 较高的速率使得可以将一个或多个尾比特并入数据块的第二部分，因此避免产生任何附加符号，例如正交频分复用符号，以专门调制尾比特。

公开(公告)号：US20130107993A1

公开(公告)日：2013-05-02

申请号：US13695982

申请日：2010-05-06

申请人： Stefan Müller-Weinfurtner ,  Toni Brkic ,  Udo Wachsmann

发明人： Stefan Müller-Weinfurtner ,  Toni Brkic ,  Udo Wachsmann

IPC分类号： H04L1/00

CPC分类号： H04L1/0054 ,  H03M13/09 ,  H03M13/23 ,  H03M13/2933 ,  H03M13/3738 ,  H03M13/413 ,  H03M13/4169 ,  H03M13/6525

摘要： A technique for processing information in a wireless communication network is described. In a method in accordance with the technique, a signal encoded with a convolution code is received. The encoded signal comprises information and a check value. The encoded signal is decoded using a Viterbi algorithm to derive the information and the check value. The decoding includes computing a Viterbi state metric. A reliability parameter is then determined based on the Viterbi state metric. The information is selectively processed depending on both the check value and the reliability parameter.

摘要翻译： 描述了一种在无线通信网络中处理信息的技术。 在根据该技术的方法中，接收利用卷积码编码的信号。 编码信号包括信息和检查值。 使用维特比算法对编码信号进行解码以导出信息和检查值。 解码包括计算维特比状态度量。 然后，基于维特比状态度量来确定可靠性参数。 根据检查值和可靠性参数，选择性地处理信息。

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。

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。