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14 条记录 (耗时 0.014 秒)

    Unequal error protection in a packet transmission system
    2.
    发明授权
    Unequal error protection in a packet transmission system 有权
    分组传输系统中的不平等的错误保护

    公开(公告)号：US07333449B2

    公开(公告)日：2008-02-19

    申请号：US10432519

    申请日：2001-11-27

    申请人： Gerd Zimmermann ,  Hui Li ,  Fabian Wenger ,  Jan Lindskog ,  Mathias Pauli

    发明人： Gerd Zimmermann ,  Hui Li ,  Fabian Wenger ,  Jan Lindskog ,  Mathias Pauli

    IPC分类号： H04B7/212

    CPC分类号： H04L1/007 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/08

    摘要： In a packet transmission system, especially wireless transmission system, where data is transmitted in packets at different error protection levels and where the error protection level of one packet (=the succeeding packet) may differ from the error protection level of a preceding packet without providing code termination between the said preceding and the said succeeding packet the performance may degrade in case a different error protection level is used by the preceding packet and the succeeding packet. The invention proposes in these cases to insert a supplementary packet between the preceding and the succeeding packet whereby the error protection level of the supplementary packet is higher than the lowest error protection level that is used either by the preceding or the succeeding packet.

    摘要翻译： 在分组传输系统中，特别是无线传输系统，其中数据以不同的错误保护级别以分组传输，并且一个分组（=后续分组）的错误保护级别可能不同于前一分组的错误保护级别而不提供 在前一个分组和后续分组使用不同的错误保护级别的情况下，所述前一个和所述后续分组之间的代码终止可能会降级。 本发明在这些情况下提出在前一个分组之间插入补充分组，由此补充分组的错误保护等级高于由前一个或后续分组使用的最低的错误保护等级。

    Channel estimation in a multi carrier transmit diversity system
    3.
    发明授权
    Channel estimation in a multi carrier transmit diversity system 有权
    多载波发射分集系统中的信道估计

    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。

    Wireless communications system with detection of foreign radiation sources
    6.
    发明授权
    Wireless communications system with detection of foreign radiation sources 有权
    无线通信系统检测外来辐射源

    公开(公告)号：US07024188B2

    公开(公告)日：2006-04-04

    申请号：US10489707

    申请日：2002-09-13

    申请人： Jamshid Khun-Jush ,  Peter Schramm ,  Jan Lindskog ,  Stefan Rommer ,  Mathias Pauli ,  Gerd Zimmermann ,  Fredrik Johansson ,  Anders Ranheim ,  Peter Larsson

    发明人： Jamshid Khun-Jush ,  Peter Schramm ,  Jan Lindskog ,  Stefan Rommer ,  Mathias Pauli ,  Gerd Zimmermann ,  Fredrik Johansson ,  Anders Ranheim ,  Peter Larsson

    IPC分类号： H04Q7/20 ,  G01S15/74 ,  G01S13/00

    CPC分类号： H04W16/14 ,  H04W24/00 ,  H04W84/12 ,  H04W84/18

    摘要： The invention discloses a method for use in a wireless communications system with a plurality of broadcasting nodes, comprising the step of enabling one node in the system to function as a central node in said system and letting said node enable measurements on at least one frequency in a frequency band used by the system. Said measurements are carried out to detect if said at least one frequency is being utilized by a transmitter foreign to the system. Preferably, the measurement is enabled by means of the node transmitting a message to other nodes in the system, said message being a message pre-defined within the system as a message prohibiting all nodes from transmitting during a certain interval, said message being transmitted after the system has been detected by the node to be silent during a predefined interval between frame transmissions from the nodes in the system.

    摘要翻译： 本发明公开了一种在具有多个广播节点的无线通信系统中使用的方法，包括使得系统中的一个节点能够用作所述系统中的中心节点并使所述节点能够在至少一个频率上进行测量的步骤 系统使用的频段。 执行所述测量以检测所述至少一个频率是否由系统外部的发射机利用。 优选地，通过节点向系统中的其他节点发送消息来实现测量，所述消息是系统内预定义的消息，作为禁止所有节点在一定间隔期间发送的消息，所述消息在 在系统中的节点的帧传输之间的预定义间隔期间，节点已经检测到系统静音。

    Interference measurements in a wireless communications system
    7.
    发明申请
    Interference measurements in a wireless communications system 有权
    无线通信系统中的干扰测量

    公开(公告)号：US20050083962A1

    公开(公告)日：2005-04-21

    申请号：US10497205

    申请日：2001-11-30

    申请人： Jamshid Khun-Jush ,  Gerd Zimmermann ,  Mathias Pauli

    发明人： Jamshid Khun-Jush ,  Gerd Zimmermann ,  Mathias Pauli

    IPC分类号： H04B7/005 ,  H04L1/20 ,  H04L12/26 ,  H04L12/28 ,  H04L12/56 ,  H04W16/14 ,  H04W24/00 ,  H04W52/28 ,  H04W74/08 ,  H04L12/413

    CPC分类号： H04W16/14 ,  H04K3/224 ,  H04K3/226 ,  H04K3/822 ,  H04K2203/18 ,  H04L1/20 ,  H04W24/00 ,  H04W52/287 ,  H04W74/08

    摘要： Interference Measurements in a Wireless Communications System A method and a transmitting unit for performing an interference measurement in a multiple access wireless communications system utilizing a carrier sensing technique is described. In accordance with the carrier sensing technique, it is monitored during a sensing period (Tmin) if a carrier is idle. A continuous or quasi-continuous interference measurement is performed on the carrier during a measurement period (TM) which is typically longer than the sensing period (Tmin). While performing the interference measurement, pulses are transmitted on the carrier such that an interval between the end of a pulse and the beginning of the next pulse is typically shorter than the sensing period (Tmin). The interference measurements preferably relate to detection of interference from radar signals or radar like signals.

    摘要翻译： 无线通信系统中的干扰测量描述了一种利用载波检测技术在多址无线通信系统中执行干扰测量的方法和发送单元。 根据载波检测技术，如果载波空闲，则在感测周期（T分钟）期间监视它。 在通常长于感测周期（T min min）的测量周期（T SUB M）期间，对载波执行连续或准连续的干涉测量。 在执行干扰测量时，在载体上传送脉冲，使得脉冲的结束与下一个脉冲的开始之间的间隔通常短于感测周期（T min min）。 干扰测量优选地涉及来自雷达信号或类雷达信号的干扰的检测。

    Interference detection in a wireless communication system
    9.
    发明授权
    Interference detection in a wireless communication system 有权
    无线通信系统中的干扰检测

    公开(公告)号：US07792224B2

    公开(公告)日：2010-09-07

    申请号：US10544812

    申请日：2003-02-11

    申请人： Michael Meixner ,  Mathias Pauli ,  Mats Hogberg

    发明人： Michael Meixner ,  Mathias Pauli ,  Mats Hogberg

    IPC分类号： H03D1/04

    CPC分类号： H04B1/1027

    摘要： A receiver and a method are applied in a wireless communication system for detecting interference with a coexisting radar system. A signal received from an antenna is fed through an analog part and a subsequent digital part of said receiver. The receiver has an element with a-priori known attenuation values for a predefined set of frequencies, a first branch-off element for deriving a first detection signal from the signal before the element and a second branch-off element for deriving a second detection signal from the signal after the element. The receiver processes the first and the second detection signal such that a difference between the first and second detection signal is comparable with a threshold value, where the threshold value depends on the a-priori known attenuation values of the element. Depending on the comparison result, a frequency is identified as interfering or not a co-existing radar system.

    摘要翻译： 一种接收机和方法被应用于用于检测对共存的雷达系统的干扰的无线通信系统中。 从天线接收的信号通过所述接收机的模拟部分和随后的数字部分馈送。 接收器具有用于预定频率组的先验已知衰减值的元件，用于从元件之前的信号导出第一检测信号的第一分支元件和用于导出第二检测信号的第二分支元件 从元素后面的信号。 接收器处理第一和第二检测信号，使得第一和第二检测信号之间的差值与阈值相当，其中阈值取决于元素的先验已知衰减值。 根据比较结果，频率被识别为干扰或不是共存的雷达系统。

    Multiplexing method in a multi carrier transmit diversity system
    10.
    发明授权
    Multiplexing method in a multi carrier transmit diversity system 有权
    多载波发射分集系统中的多路复用方法

    公开(公告)号：US07477697B2

    公开(公告)日：2009-01-13

    申请号：US10471825

    申请日：2002-03-01

    申请人： Mathias Pauli ,  Eric Sachse ,  Udo Wachsmann

    发明人： Mathias Pauli ,  Eric Sachse ,  Udo Wachsmann

    IPC分类号： H04L1/02 ,  H04B7/02

    CPC分类号： H04L27/2602 ,  H04B7/0669 ,  H04B7/0671 ,  H04B7/12 ,  H04L1/0001 ,  H04L1/04 ,  H04L1/0618 ,  H04L5/023

    摘要： The invention relates to a method of multiplexing data words in a multicarrier transmit diversity system. The method comprises the step of generating a plurality of data blocks, each data block comprising data words and each data word containing data symbols derived from a data signal, the step of determining for one or more data blocks in dependence on at least one transmission constraint if the data words of said one or more data blocks are to be multiplexed in the time domain or in the frequency domain and the step of multiplexing the data words of the data blocks in accordance with the determination result.

    摘要翻译： 本发明涉及在多载波发射分集系统中复用数据字的方法。 该方法包括生成多个数据块的步骤，每个数据块包括数据字和包含从数据信号导出的数据符号的每个数据字，根据至少一个传输约束确定一个或多个数据块的步骤 如果所述一个或多个数据块的数据字将在时域或频域中复用，以及根据确定结果复用数据块的数据字的步骤。