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118 条记录 (耗时 0.018 秒)

    System and method for radio transmitter acquisition
    31.
    发明授权
    System and method for radio transmitter acquisition 有权
    无线电发射机采集系统和方法

    公开(公告)号：US07103362B2

    公开(公告)日：2006-09-05

    申请号：US10473337

    申请日：2002-03-27

    申请人： Shiquan Wu

    发明人： Shiquan Wu

    IPC分类号： H04Q7/20

    CPC分类号： H04B1/7087 ,  H04B1/70754 ,  H04B1/7077 ,  H04B1/70775 ,  H04L5/0007 ,  H04L5/0048 ,  H04L27/2613 ,  H04L27/2655

    摘要： A method of a receiver determining the timing of a signal transmitted in a time-slotted manner, the signal comprising a sequence of information which is repeated at a known interval and has at least a known minimum length. The method performs correlation operations between groups of received slots of information, the groups spaced by the known interval. The groups are moved through the received signal, adding and removing slots, to locate a maximum correlation value sum for the group which should correspond to the timing of the slot. The method also can be used to determine a frequency offset at the receiver and/or an initial phase.

    摘要翻译： 一种接收机确定以时隙方式发送的信号的定时的方法，所述信号包括以已知间隔重复且具有至少已知最小长度的信息序列。 该方法在接收到的信息时隙的组之间执行相关操作，所述组间隔了已知间隔。 通过接收的信号移动组，添加和移除时隙，以便为应该对应于时隙的定时的组定位最大相关值和。 该方法还可以用于确定接收机处的频率偏移和/或初始相位。

    Timing phase recovery method and apparatus
    34.
    发明授权
    Timing phase recovery method and apparatus 有权
    定时相恢复方法及装置

    公开(公告)号：US06549594B1

    公开(公告)日：2003-04-15

    申请号：US09329365

    申请日：1999-06-10

    申请人： Xixian Chen ,  Song Zhang ,  Shiquan Wu

    发明人： Xixian Chen ,  Song Zhang ,  Shiquan Wu

    IPC分类号： H04L700

    CPC分类号： H04L25/0202

    摘要： A method for timing phase recovery including the steps of first, estimating an open-eye sequence of a received signal, second, estimating a channel response using the open-eye sequence, and third, correlating the estimated channel response with an ideal channel response to determine the peak correlation location. The peak correlation location corresponds to the recovered timing phase. A system including means for estimating an open-eye sequence of a received signal, a channel estimator and a correlator is also provided. The channel estimator is used for estimating a channel response using the open-eye sequence and the received signal. The correlator is used for correlating the estimated channel response with an ideal channel response to determine the peak correlation location, the peak correlation location corresponding to the recovered timing phase.

    摘要翻译： 一种用于定时相位恢复的方法，包括以下步骤：首先估计接收信号的睁眼序列，其次，使用睁眼序列估计信道响应，以及第三，将所估计的信道响应与理想信道响应相关联 确定峰值相关位置。 峰值相关位置对应于恢复的定时相位。 还提供了一种包括用于估计接收信号的睁眼序列的装置，信道估计器和相关器的系统。 信道估计器用于使用睁眼序列和接收信号来估计信道响应。 相关器用于将估计的信道响应与理想信道响应相关以确定峰值相关位置，对应于恢复的定时相位的峰值相关位置。

    Signal time of arrival estimation method and system
    35.
    发明授权
    Signal time of arrival estimation method and system 有权
    信号到达时间估计方法和系统

    公开(公告)号：US06510186B1

    公开(公告)日：2003-01-21

    申请号：US09321818

    申请日：1999-05-28

    申请人： Xixian Chen ,  Song Zhang ,  Shiquan Wu

    发明人： Xixian Chen ,  Song Zhang ,  Shiquan Wu

    IPC分类号： H04L2706

    CPC分类号： H04L25/0202

    摘要： A time delay estimation method including the steps of first, estimating a channel response from a received signal, and second, determining a time delay estimate by correlating the estimated channel response with an ideal channel response. Further, a system including a channel estimator and a correlator is provided. The channel estimator is used for estimating a channel response from a received signal and the correlator is used for estimating a time delay using the channel response and an ideal channel response.

    摘要翻译： 一种时间延迟估计方法，包括以下步骤：首先，从接收信号估计信道响应，其次，通过将所估计的信道响应与理想信道响应相关来确定时延估计。此外，包括信道估计器和 提供相关器。 信道估计器用于从接收信号估计信道响应，并且相关器用于使用信道响应和理想信道响应来估计时间延迟。

    Systems and etiquette for home gateways using white space
    37.
    发明授权
    Systems and etiquette for home gateways using white space 有权
    使用空白的家庭网关系统和礼仪

    公开(公告)号：US08995292B2

    公开(公告)日：2015-03-31

    申请号：US13334763

    申请日：2011-12-22

    申请人： Shiquan Wu ,  Jung Yee

    发明人： Shiquan Wu ,  Jung Yee

    IPC分类号： H04L12/26 ,  H04L27/26 ,  H04W16/02 ,  H04W16/14 ,  H04L5/00 ,  H04W24/00 ,  H04W88/16

    CPC分类号： H04L27/2602 ,  H04L5/0007 ,  H04L5/003 ,  H04W16/02 ,  H04W16/14 ,  H04W24/00 ,  H04W88/16

    摘要： Methods and systems for sharing white space with primary services and other emerging services are provided. Signal distribution within a specified location, such as a dwelling, is performed using a home gateway that identifies unused white space, reserves such white space spectrum, and delivers data to one or more devices at the respective location using the reserved spectrum. Signalling between the devices and the gateway is performed over a shared signalling channel, which enables the gateway to advise the devices from where and when to receive data. The gateway also uses a common spectrum reservation OFDM symbol to advise the neighbouring gateways of the local spectrum reservation.

    摘要翻译： 提供了与主要服务和其他新兴服务共享空白空间的方法和系统。 使用识别未使用的空白空间的家庭网关，保留这样的空白频谱，并使用保留的频谱将数据传送到相应位置的一个或多个设备来执行指定位置（例如住宅）内的信号分配。 通过共享信令信道来执行设备和网关之间的信令，这使得网关能够从哪里和何时接收数据来通知设备。 网关还使用公共频谱预留OFDM符号来向本地频谱预留的相邻网关提供建议。

    Systems and methods for distributing GPS clock to communications device
    38.
    发明授权
    Systems and methods for distributing GPS clock to communications device 有权
    将GPS时​​钟分配给通信设备的系统和方法

    公开(公告)号：US08675666B2

    公开(公告)日：2014-03-18

    申请号：US13206324

    申请日：2011-08-09

    申请人： Shiquan Wu ,  Jung Yee

    发明人： Shiquan Wu ,  Jung Yee

    IPC分类号： H04L12/28 ,  H04L5/00 ,  H04L7/00

    CPC分类号： G04G7/00 ,  H04J3/0635 ,  H04J3/0638 ,  H04J3/0658

    摘要： A method for synchronizing network elements to a global clock derived from the GPS clock acquired by a plurality of base stations. The global clock is distributed to controllers of various networks, and from there to network access devices. The network access devices further distribute the global clock to various wire-line and local wireless networks and from there, to the users served by these networks. The user equipment is enabled with a simple clock discipliner that adjusts the local clock to the global clock, resulting in a reliable synchronization across the converged communication networks.

    摘要翻译： 一种用于将网络元件与由多个基站获取的GPS时钟导出的全局时钟同步的方法。 全局时钟分配给各种网络的控制器，从那里到网络接入设备。 网络接入设备进一步将全球时钟分配给各种有线和本地无线网络，并从那里向由这些网络服务的用户分发。 用户设备启用了简单的时钟规则，可以将本地时钟调整到全局时钟，从而在融合的通信网络中实现可靠的同步。

    Methods and apparatus for OFDM symbol synchronization for in-door digital TV reception
    40.
    发明授权
    Methods and apparatus for OFDM symbol synchronization for in-door digital TV reception 有权
    用于室内数字电视接收的OFDM符号同步的方法和装置

    公开(公告)号：US08483330B2

    公开(公告)日：2013-07-09

    申请号：US12551980

    申请日：2009-09-01

    申请人： Lingjie Li ,  Shiquan Wu

    发明人： Lingjie Li ,  Shiquan Wu

    IPC分类号： H03D1/00

    CPC分类号： H04L27/2665 ,  H04L27/2607 ,  H04L27/2663 ,  H04L27/2678 ,  H04L27/2688

    摘要： A received signal comprises a continuous sequence of symbols φ1, φ2, . . . φn, each represented by a sequence of samples X0, X2, . . . Xn−1, and wherein the symbols have a guard period GP of duration Tgp at the beginning thereof. Each guard period contains a cyclic prefix with the same subsequence of samples as a tail end portion of the associated symbol. The symbols are identified by delaying the received signal by a fixed number of samples, computing the correlation of the received signal with the delayed signal, computing the summation of said correlation over a window of duration Ti, wherein Ti>Tgp, and sliding the window over the correlation to find a characteristic point or region. The start of each symbol for further processing is selected from the characteristic point or region. By increasing the duration of the window, more robust performance can be achieved, especially in multipath conditions.

    摘要翻译： 接收到的信号包括符号phi1，phi2，...的连续序列。 。 。 每个由样品X0，X2的序列表示。 。 。 Xn-1，并且其中符号在其开始处具有持续时间Tgp的保护周期GP。 每个保护周期包含循环前缀，其具有与相关联的符号的尾端部分相同的样本子序列。 通过将接收到的信号延迟固定数量的样本来识别符号，计算接收信号与延迟信号的相关性，计算持续时间Ti的窗口上的所述相关性的总和，其中Ti> Tgp，并且滑动窗口 在相关性上找到特征点或区域。 从特征点或区域中选择用于进一步处理的每个符号的开始。 通过增加窗口的持续时间，可以实现更强大的性能，特别是在多径条件下。