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    Data transmitter and data receiver
    1.
    发明授权
    Data transmitter and data receiver 有权
    数据发射机和数据接收机

    公开(公告)号：US09172522B2

    公开(公告)日：2015-10-27

    申请号：US13867292

    申请日：2013-04-22

    申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.

    发明人： Josef Bernhard ,  Gerd Kilian ,  Andreas Tasch

    IPC分类号： H04L7/00 ,  H04L7/04 ,  H04L27/00

    CPC分类号： H04L7/041 ,  H04L7/00 ,  H04L27/0014 ,  H04L2027/0067 ,  H04L2027/0093 ,  H04W72/04

    摘要： A data transmitter for transmitting a data packet to a data receiver via a communication channel includes a generator for generating the data packet and a transmitter for transmitting the data packet. The generator for generating the data packet is configured to generate a data packet having a first data block and a second data block and a predefined first reference sequence and second reference sequence for synchronizing the data receiver, wherein the first reference sequence is longer than the second reference sequence, and wherein in the data packet, the second data block is located between the first reference sequence and the second reference sequence, and the first reference sequence is located between the first data block and the second data block. The transmitter for transmitting the data packet is configured to transmit the data packet to the data receiver via the communication channel.

    摘要翻译： 用于经由通信信道向数据接收机发送数据分组的数据发送器包括用于产生数据分组的发生器和用于发送数据分组的发送机。 用于生成数据分组的生成器被配置为生成具有第一数据块和第二数据块的数据分组以及用于同步数据接收器的预定义的第一参考序列和第二参考序列，其中第一参考序列比第二参考序列长 参考序列，并且其中在所述数据分组中，所述第二数据块位于所述第一参考序列和所述第二参考序列之间，并且所述第一参考序列位于所述第一数据块和所述第二数据块之间。 用于发送数据分组的发射机被配置为经由通信信道将数据分组发送到数据接收机。

    Frequency offset estimator
    4.
    发明授权
    Frequency offset estimator 有权
    频偏估计器

    公开(公告)号：US08457178B2

    公开(公告)日：2013-06-04

    申请号：US12055087

    申请日：2008-03-25

    申请人： Tao Luo

    发明人： Tao Luo

    IPC分类号： H04B1/00

    CPC分类号： H04B1/7087 ,  H04B1/7117 ,  H04L27/0014 ,  H04L2027/0024 ,  H04L2027/0046 ,  H04L2027/0055 ,  H04L2027/0093

    摘要： Determining a frequency offset of a received signal utilizing two or more multipath components of the received signal is provided herein. By way of example, the received signal can be correlated with a synchronization sequence in a time domain or a frequency domain, resulting in separation of the two or more multipath components of the received signal. Analysis of at least one of the multipath components can provide a frequency offset of the received signal. Furthermore, by analyzing the multipath components, estimation of the frequency offset can be improved as compared with single-signal analysis techniques.

    摘要翻译： 本文提供了利用接收信号的两个或多个多径分量来确定接收信号的频率偏移。 作为示例，接收的信号可以与时域或频域中的同步序列相关，导致接收信号的两个或更多个多径分量的分离。 至少一个多径分量的分析可以提供接收信号的频率偏移。 此外，通过分析多路径分量，与单信号分析技术相比，可以提高频偏的估计。

    Method and device for estimating a multicarrier signal propagation channel
    6.
    发明授权
    Method and device for estimating a multicarrier signal propagation channel 有权
    用于估计多载波信号传播信道的方法和装置

    公开(公告)号：US08094732B2

    公开(公告)日：2012-01-10

    申请号：US10564866

    申请日：2004-07-16

    申请人： Bruno Jahan ,  Pierrick Louin

    发明人： Bruno Jahan ,  Pierrick Louin

    IPC分类号： H04K1/10 ,  H04L27/28

    CPC分类号： H04L25/0232 ,  H04L25/022 ,  H04L27/2647 ,  H04L27/2657 ,  H04L2027/003 ,  H04L2027/0093

    摘要： A method is provided for estimating a propagation channel composed of successive symbols of a multicarrier signal, each comprising at least one reference pilot and a plurality of data-carrying frequencies. Such a method comprises, in particular, at least one step consisting of correcting the at least one reference pilot on the basis of a first estimation of a propagation channel, in order to provide a second, more precise estimation of the channel.

    摘要翻译： 提供了一种用于估计由多载波信号的连续符号组成的传播信道的方法，每个信号包括至少一个参考导频和多个数据携带频率。 特别地，这种方法包括至少一个步骤，该步骤包括基于传播信道的第一估计来校正至少一个参考导频，以便提供信道的第二更准确的估计。

    Method for frequency acquisition of a mobile communications device
    8.
    发明授权
    Method for frequency acquisition of a mobile communications device 有权
    用于移动通信设备的频率采集的方法

    公开(公告)号：US07826577B2

    公开(公告)日：2010-11-02

    申请号：US10381149

    申请日：2001-09-19

    申请人： Bernd Bienek ,  Andreas Falkenberg ,  Stephan Karger ,  Theo Kreul ,  Albrecht Kunz ,  Holger Landenberger

    发明人： Bernd Bienek ,  Andreas Falkenberg ,  Stephan Karger ,  Theo Kreul ,  Albrecht Kunz ,  Holger Landenberger

    IPC分类号： H04L7/00

    CPC分类号： H04L27/2332 ,  H04L2027/0032 ,  H04L2027/0093

    摘要： A method is provided for frequency acquisition, particularly for initial frequency acquisition, pursuant to a known synchronization sequence for synchronizing a mobile communications device having a local oscillator with previously known transmit frequencies of a base station that transmit in a known channel raster with defined frequency points within a band, wherein the method includes the steps of determining the inband power of the known synchronization sequence via a sensor by scanning a frequency band, performing coarse determination of the local power maximum of the inband power and, thus, of the received carrier frequency over the scanned frequency band, producing a presumed channel frequency at which the base station is transmitting on the basis of knowledge of the channel raster of the transmit frequencies of the base station, performing fine determination of the received carrier frequency by comparison with the known synchronization sequence, and correcting the frequency deviation of the local oscillator from the transmitted carrier frequency.

    摘要翻译： 提供了一种用于频率获取的方法，特别是用于初始频率采集的已知同步序列，用于使具有本地振荡器的移动通信设备与先前已知的在已知信道光栅中以定义的频率点发射的基站的发射频率同步 在频带内，其中所述方法包括以下步骤：通过扫描频带，经由传感器确定已知同步序列的带内功率，执行所述带内功率的本地功率最大值的粗略确定，并且因此执行所接收的载波频率 在扫描的频带上，基于基站的基站的发射频率的信道光栅的知识产生基站正在发送的假定信道频率，通过与已知同步的比较来执行接收的载波频率的精细确定 序列，并校正频率偏差 本地振荡器从发射载波频率。

    TRANSMITTER AND METHOD FOR TRANSMITTING SOFT PILOT SYMBOLS IN A DIGITAL COMMUNICATION SYSTEM
    9.
    发明申请
    TRANSMITTER AND METHOD FOR TRANSMITTING SOFT PILOT SYMBOLS IN A DIGITAL COMMUNICATION SYSTEM 审中-公开
    用于在数字通信系统中传输软导频符号的发射机和方法

    公开(公告)号：US20090310707A1

    公开(公告)日：2009-12-17

    申请号：US12239872

    申请日：2008-09-29

    申请人： Jung-Fu Cheng ,  Tracy Fulghum ,  Douglas Cairns

    发明人： Jung-Fu Cheng ,  Tracy Fulghum ,  Douglas Cairns

    IPC分类号： H04L27/36 ,  H04L27/00 ,  H04L27/20

    CPC分类号： H04L25/0236 ,  H04B2201/70701 ,  H04B2201/709727 ,  H04L1/0017 ,  H04L1/0041 ,  H04L1/0068 ,  H04L25/021 ,  H04L25/0226 ,  H04L25/03044 ,  H04L25/03324 ,  H04L25/061 ,  H04L27/0012 ,  H04L27/227 ,  H04L27/3455 ,  H04L27/3818 ,  H04L2001/0098 ,  H04L2025/03401 ,  H04L2025/0342 ,  H04L2025/03426 ,  H04L2025/03509 ,  H04L2025/03796 ,  H04L2027/0061 ,  H04L2027/0093

    摘要： A transmitter, channel coder, and method for coding and transmitting a sequence of symbols in a digital communication system utilizing soft pilot symbols. In one embodiment, the transmitter transmits a set of soft pilot symbols with higher reliability than the remaining symbols in the sequence by modulating the soft pilot symbols with a lower order modulation such as BPSK or QPSK while modulating the remaining symbols with a higher order modulation such as 16 QAM or 64 QAM. The transmitter shares the modulation type and location (time/frequency/code) of the soft pilot symbols with a receiver. Unlike traditional fixed pilots, the soft pilots still carry some data. Additionally, the soft pilots are particularly helpful in establishing the amplitude reference essential in demodulating the higher order modulation symbols. In another embodiment, soft pilot symbols are inserted by low-level puncturing of channel encoded bits and replacing the punctured bits with known bit patterns.

    摘要翻译： 用于使用软导频符号在数字通信系统中对符号序列进行编码和发送的发射机，信道编码器和方法。 在一个实施例中，发射机通过用低阶调制（诸如BPSK或QPSK）调制软导频符号，以较高阶调制方式调制剩余符号，从而发送比序列中其余符号更高的可靠性的一组软导频符号， 作为16 QAM或64 QAM。 发射机与接收机共享软导频符号的调制类型和位置（时间/频率/码）。 与传统的固定飞行员不同，软飞行员仍然携带一些数据。 此外，软导频器在建立解调高阶调制符号时必不可少的幅度参考是特别有用的。 在另一个实施例中，通过信道编码比特的低级删截插入软导频符号，并用已知的比特模式替换被删余的比特。

    Carrier Phase Ambiguity Correction
    10.
    发明申请
    Carrier Phase Ambiguity Correction 失效
    载波相位模糊校正

    公开(公告)号：US20080292004A1

    公开(公告)日：2008-11-27

    申请号：US11579689

    申请日：2005-03-29

    申请人： Ivonete Markman ,  Gabriel Alfred Edde

    发明人： Ivonete Markman ,  Gabriel Alfred Edde

    IPC分类号： H04L27/06

    CPC分类号： H04L27/0014 ,  H04L2027/0046 ,  H04L2027/0053 ,  H04L2027/0067 ,  H04L2027/0093

    摘要： A receiver comprises a demodulator for providing a demodulated signal and a centroid calculator responsive to the demodulated signal for identifying a correct carrier phase for use in the centroid calculation and in removing carrier phase ambiguity in the demodulator. In addition, the centroid calculator may include a limiter.

    摘要翻译： 接收机包括用于提供解调信号的解调器和响应于解调信号的质心计算器，用于识别在质心计算中使用的正确载波相位，以及消除解调器中的载波相位模糊度。 另外，重心计算器可以包括限制器。