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    Monitoring and correcting timing errors in wireless communication
    1.
    发明授权
    Monitoring and correcting timing errors in wireless communication 有权
    监控和校正无线通信中的定时误差

    公开(公告)号：US08718154B2

    公开(公告)日：2014-05-06

    申请号：US12620866

    申请日：2009-11-18

    申请人： Taesang Yoo ,  Peter Gaal ,  Tao Luo

    发明人： Taesang Yoo ,  Peter Gaal ,  Tao Luo

    IPC分类号： H04L27/28

    CPC分类号： H04L27/2673 ,  H04L27/2665

    摘要： Providing for improved tracking and correction of timing in wireless communications is disclosed herein. By way of example, a first algorithm can be employed to track timing of a wireless signal, based on one dimension of the signal. Additionally, a second algorithm based on a different dimension of the signal can be employed to verify the timing and reduce errors in timing analysis. Various signal dimensions can be employed for the analysis, including cyclic prefix, frequency, channel impulse response, or the like, or a combination thereof. Additionally, different channels of the wireless signal can also be analyzed by the first algorithm and the second algorithm. Furthermore, the second algorithm can be selected to reduce deficiencies identified in the first algorithm, to improve overall timing analysis, reduce undetected timing errors or false errors, and improve timing correction.

    摘要翻译： 本文公开了提供无线通信中的改进的定时跟踪和校正。 作为示例，可以采用第一算法来基于信号的一个维度来跟踪无线信号的定时。 另外，可以采用基于信号的不同维度的第二算法来验证定时并减少定时分析中的误差。 可以采用各种信号尺寸进行分析，包括循环前缀，频率，信道脉冲响应等，或其组合。 此外，无线信号的不同信道也可以通过第一算法和第二算法进行分析。 此外，可以选择第二算法以减少在第一算法中识别的缺陷，以改善总体时序分析，减少未检测到的定时误差或错误误差，并且改善定时校正。

    MONITORING AND CORRECTING TIMING ERRORS IN WIRELESS COMMUNICATION
    2.
    发明申请
    MONITORING AND CORRECTING TIMING ERRORS IN WIRELESS COMMUNICATION 有权
    监测和校正无线通信中的时序错误

    公开(公告)号：US20110116561A1

    公开(公告)日：2011-05-19

    申请号：US12620866

    申请日：2009-11-18

    申请人： Taesang Yoo ,  Peter Gaal ,  Tao Luo

    发明人： Taesang Yoo ,  Peter Gaal ,  Tao Luo

    IPC分类号： H04L27/28

    CPC分类号： H04L27/2673 ,  H04L27/2665

    摘要： Providing for improved tracking and correction of timing in wireless communications is disclosed herein. By way of example, a first algorithm can be employed to track timing of a wireless signal, based on one dimension of the signal. Additionally, a second algorithm based on a different dimension of the signal can be employed to verify the timing and reduce errors in timing analysis. Various signal dimensions can be employed for the analysis, including cyclic prefix, frequency, channel impulse response, or the like, or a combination thereof. Additionally, different channels of the wireless signal can also be analyzed by the first algorithm and the second algorithm. Furthermore, the second algorithm can be selected to reduce deficiencies identified in the first algorithm, to improve overall timing analysis, reduce undetected timing errors or false errors, and improve timing correction.

    摘要翻译： 本文公开了提供无线通信中的改进的定时跟踪和校正。 作为示例，可以采用第一算法来基于信号的一个维度来跟踪无线信号的定时。 另外，可以采用基于信号的不同维度的第二算法来验证定时并减少定时分析中的误差。 可以采用各种信号尺寸进行分析，包括循环前缀，频率，信道脉冲响应等，或其组合。 此外，无线信号的不同信道也可以通过第一算法和第二算法进行分析。 此外，可以选择第二算法以减少在第一算法中识别的缺陷，以改善总体时序分析，减少未检测到的定时误差或错误误差，并且改善定时校正。

    SYNCHRONIZATION DEVICE AND SYNCHRONIZATION METHOD
    3.
    发明申请
    SYNCHRONIZATION DEVICE AND SYNCHRONIZATION METHOD 审中-公开

    公开(公告)号：US20190044780A1

    公开(公告)日：2019-02-07

    申请号：US16052753

    申请日：2018-08-02

    申请人： ANRITSU CORPORATION

    发明人： Sunao RONTE

    IPC分类号： H04L27/26 ,  H04L7/04 ,  H04L7/06

    CPC分类号： H04L27/2659 ,  H04L7/042 ,  H04L7/06 ,  H04L27/2646 ,  H04L27/265 ,  H04L27/2663 ,  H04L27/2665 ,  H04L27/2671 ,  H04L27/2672 ,  H04L27/2673

    摘要： A synchronization device has a signal reception unit and a signal generation unit. The latter provides a multicarrier signal, which serves as an internally transmitted signal. The former receives the same type of externally received signal as the internally transmitted signal. An STO timing detection unit detects a position at which a correlation value in the correlation calculation between sampled data of the internally transmitted signal shifted at a predetermined sampling interval and sampled data of the externally received signal is maximum as an STO timing. A difference calculation unit calculates a difference between phases of the externally received signal and the internally transmitted signal at each subcarrier in a state in which the STO timing is detected. A correction control unit executes correction control on the signal generation unit such that a difference in a phase of each calculated subcarrier is added as a correction amount.

    Systems and Methods for Transporting Time-of-Day Information in a Communication System
    5.
    发明申请
    Systems and Methods for Transporting Time-of-Day Information in a Communication System 有权
    在通信系统中传输时间信息的系统和方法

    公开(公告)号：US20110296226A1

    公开(公告)日：2011-12-01

    申请号：US13103072

    申请日：2011-05-08

    申请人： Massimo Sorbara ,  Sigurd Schelstraete ,  Robert A. Day ,  Peter D. Keller

    发明人： Massimo Sorbara ,  Sigurd Schelstraete ,  Robert A. Day ,  Peter D. Keller

    IPC分类号： G06F1/12

    CPC分类号： H04J3/0685 ,  H04J3/0638 ,  H04J3/0667 ,  H04L27/2656 ,  H04L27/2673 ,  H04M11/062

    摘要： Systems and methods for synchronizing a clock at a customer premises equipment (CPE) location with a master clock at a central office (CO) location are described. One embodiment is a method that comprises receiving, by a time-of-day transmission convergence (ToD-TC) module in the CPE, ToD information relating to the master clock. Based on the received information, time stamps are applied to reference data samples. The method further comprises transporting the ToD information by transporting the reference data samples with applied time stamps and utilizing time stamps of the reference data samples to synchronize the CPE clock with the master clock.

    摘要翻译： 描述了用于在客户驻地设备（CPE）位置与中心局（CO）位置处的主时钟同步时钟的系统和方法。 一个实施例是一种方法，其包括通过CPE中的日期传输收敛（ToD-TC）模块接收与主时钟相关的ToD信息。 基于接收到的信息，将时间戳应用于参考数据样本。 该方法还包括通过传送具有应用时间戳的参考数据样本并利用参考数据样本的时间戳来传送ToD信息，以使CPE时钟与主时钟同步。

    NARROW-BAND PREAMBLE FOR ORTHOGONAL FREQUENCY-DIVISION MULTIPLEXING SYSTEM
    7.
    发明申请
    NARROW-BAND PREAMBLE FOR ORTHOGONAL FREQUENCY-DIVISION MULTIPLEXING SYSTEM 审中-公开
    正交频分复用系统的窄带前缀

    公开(公告)号：US20140169488A1

    公开(公告)日：2014-06-19

    申请号：US13966128

    申请日：2013-08-13

    申请人： QUALCOMM Incorporated

    发明人： Nicola Varanese ,  Muhammad Awais Amin ,  Christoph A. Joetten ,  Juan Montojo

    IPC分类号： H04L27/26

    CPC分类号： H04L27/2602 ,  H04L5/0048 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2673

    摘要： A method of signal generation includes selecting a subset of contiguous OFDM symbols from a set of contiguous OFDM symbols, selecting a subset of contiguous subcarriers from a set of subcarriers, and generating a preamble that occupies the subset of contiguous subcarriers in the subset of contiguous OFDM symbols. The preamble includes portions in respective OFDM symbols of the subset of contiguous OFDM symbols. In the time domain each preamble portion corresponds to a repeating sequence of samples when subcarriers outside of the subset of contiguous subcarriers are filtered out. Generating the preamble may include flipping the sign of one or more occurrences of the repeating sequence for a final preamble portion and may include placing modulation symbols on regularly spaced subcarriers in the subset of contiguous subcarriers and phase-shifting the modulation symbols for a respective preamble portion with respect to a previous preamble portion.

    摘要翻译： 一种信号产生方法包括从一组连续的OFDM符号中选择连续的OFDM符号子集，从一组子载波中选择一连续子载波的子集，并产生占用连续OFDM子集中连续子载波子集的前导码 符号。 前导码包括连续OFDM符号子集的相应OFDM符号中的部分。 在时域中，当连续副载波的子集之外的子载波被滤除时，每个前导码部分对应于样本的重复序列。 生成前导码可以包括翻转最后前导码部分的重复序列的一个或多个出现的符号，并且可以包括将调制符号放置在相邻子载波的子集中的规则间隔的子载波上，并相移相应的前同步码部分的调制符号 相对于前一个前导码部分。

    Method and apparatus for frequency-domain tracking of residual frequency and channel estimation offsets
    8.
    发明授权
    Method and apparatus for frequency-domain tracking of residual frequency and channel estimation offsets 有权
    残余频率和信道估计偏移频域跟踪的方法和装置

    公开(公告)号：US07170961B2

    公开(公告)日：2007-01-30

    申请号：US10042780

    申请日：2002-01-08

    申请人： Patrick Vandenameele-Lepla

    发明人： Patrick Vandenameele-Lepla

    IPC分类号： H04L7/00 ,  H04L25/40 ,  H03D3/24 ,  H04B7/14 ,  H04B7/165

    CPC分类号： H04L27/2673 ,  H04L27/2659 ,  H04L27/266 ,  H04L27/2695

    摘要： Various methods and apparatus for frequency-domain estimation of carrier frequency offsets are provided in which the carrier frequency offset estimate is robust against non-white (frequency-dependent) noise. A carrier-specific weighting factor is associated with each carrier of a multi-carrier signal. Using the carrier-specific weighting factors, a carrier frequency offset estimate is computed from received signals and estimated channel transfer functions associated with each of the carriers. Because greater weights are given to carriers whose frequencies include lower noise and/or carriers transmitting a known sequence of symbols, the estimate of the carrier frequency offset is improved. The carrier frequency offset estimate may then be applied in a feedback loop to phase-compensate a subsequently received signal.

    摘要翻译： 提供了用于载波频率偏移的频域估计的各种方法和装置，其中载波频率偏移估计针对非白色（频率相关）噪声是鲁棒的。 载波特定加权因子与多载波信号的每个载波相关联。 使用载波特定的加权因子，从与每个载波相关联的接收信号和估计的信道传递函数计算载波频率偏移估计。 由于给予其频率包括较低噪声和/或载波的载波的更大的权重传送已知的符号序列，所以载波频率偏移的估计得到改善。 然后可以在反馈回路中施加载波频率偏移估计，以对随后接收的信号进行相位补偿。

    Method and apparatus for frequency-domain tracking of residual frequency and channel estimation offsets
    9.
    发明申请
    Method and apparatus for frequency-domain tracking of residual frequency and channel estimation offsets 有权
    残余频率和信道估计偏移频域跟踪的方法和装置

    公开(公告)号：US20030128751A1

    公开(公告)日：2003-07-10

    申请号：US10042780

    申请日：2002-01-08

    申请人： Resonext Communications, Inc.

    发明人： Patrick Vandenameele-Lepla

    IPC分类号： H03K005/159 ,  H04B001/38 ,  H04B001/10

    CPC分类号： H04L27/2673 ,  H04L27/2659 ,  H04L27/266 ,  H04L27/2695

    摘要： Various methods and apparatus for frequency-domain estimation of carrier frequency offsets are provided in which the carrier frequency offset estimate is robust against non-white (frequency-dependent) noise. A carrier-specific weighting factor is associated with each carrier of a multi-carrier signal. Using the carrier-specific weighting factors, a carrier frequency offset estimate is computed from received signals and estimated channel transfer functions associated with each of the carriers. Because greater weights are given to carriers whose frequencies include lower noise and/or carriers transmitting a known sequence of symbols, the estimate of the carrier frequency offset is improved. The carrier frequency offset estimate may then be applied in a feedback loop to phase-compensate a subsequently received signal.

    摘要翻译： 提供了用于载波频率偏移的频域估计的各种方法和装置，其中载波频率偏移估计针对非白色（频率相关）噪声是鲁棒的。 载波特定加权因子与多载波信号的每个载波相关联。 使用载波特定的加权因子，从与每个载波相关联的接收信号和估计的信道传递函数计算载波频率偏移估计。 由于给予其频率包括较低噪声和/或载波的载波的更大的权重传送已知的符号序列，所以载波频率偏移的估计得到改善。 然后可以在反馈回路中施加载波频率偏移估计，以对随后接收的信号进行相位补偿。