公开(公告)号：US07009931B2

公开(公告)日：2006-03-07

申请号：US09751881

申请日：2000-12-29

申请人： Jianglei Ma ,  Wen Tong ,  Shiquan Wu

发明人： Jianglei Ma ,  Wen Tong ,  Shiquan Wu

IPC分类号： H04J11/00

CPC分类号： H04L25/0202 ,  H04B7/0669 ,  H04B7/0697 ,  H04B7/0845 ,  H04B7/0874 ,  H04B7/0894 ,  H04L1/0618 ,  H04L27/2659 ,  H04L27/266 ,  H04L27/2662 ,  H04L27/2675

摘要： Methods and apparatus are described for time synchronizing a receiver to orthogonal frequency division multiplexing (OFDM) signals in a multiple-input/multiple-output (MIMO) system, the signals being transmitted from multiple transmitters and received at multiple receivers. The method includes determining the frequency offset and the sampling clock offset of the received signals.

公开(公告)号：US07403570B2

公开(公告)日：2008-07-22

申请号：US11798342

申请日：2007-05-14

申请人： Jianglei Ma ,  Wen Tong ,  Shiquan Wu

发明人： Jianglei Ma ,  Wen Tong ,  Shiquan Wu

IPC分类号： H04L27/28

CPC分类号： H04B7/0619 ,  H04B7/0413 ,  H04B7/0669 ,  H04B7/0684 ,  H04B7/0691 ,  H04B7/0697 ,  H04B7/0845 ,  H04B7/0874 ,  H04B7/0894 ,  H04L1/0618 ,  H04L5/0023 ,  H04L5/0026 ,  H04L5/0048 ,  H04L5/0053 ,  H04L25/0204 ,  H04L25/0226 ,  H04L27/2605 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2662

摘要： One or more preambles are inserted into frames of Orthogonal Frequency Multiplexing (OFDM)-Multiple Input, Multiple Output (MIMO) signals. The preamble is received by the antennas of a receiver, decoded and compared to known values to provide synchronization, framing, channels estimation, offsets and other corrections to the transmitted signal.

摘要翻译： 将一个或多个前导码插入到正交频分复用（OFDM） - 多输入多输出（MIMO）信号的帧中。 前导码由接收机的天线接收，被解码并与已知值进行比较，以向发送的信号提供同步，成帧，信道估计，偏移和其他校正。

公开(公告)号：US07233625B2

公开(公告)日：2007-06-19

申请号：US09819957

申请日：2001-03-28

申请人： Jianglei Ma ,  Wen Tong ,  Shiquan Wu

发明人： Jianglei Ma ,  Wen Tong ,  Shiquan Wu

IPC分类号： H04L27/28

CPC分类号： H04B7/0619 ,  H04B7/0413 ,  H04B7/0669 ,  H04B7/0684 ,  H04B7/0691 ,  H04B7/0697 ,  H04B7/0845 ,  H04B7/0874 ,  H04B7/0894 ,  H04L1/0618 ,  H04L5/0023 ,  H04L5/0026 ,  H04L5/0048 ,  H04L5/0053 ,  H04L25/0204 ,  H04L25/0226 ,  H04L27/2605 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2662

摘要： One or more preambles are inserted into frames of Orthogonal Frequency Multiplexing (OFDM)-Multiple Input, Multiple Output (MIMO) signals. The preamble is received by the antennas of a receiver, decoded and compared to known values to provide synchronization, framing, channels estimation, offsets and other corrections to the transmitted signal.

摘要翻译： 将一个或多个前导码插入到正交频分复用（OFDM） - 多输入多输出（MIMO）信号的帧中。 前导码由接收机的天线接收，被解码并与已知值进行比较，以向发送的信号提供同步，成帧，信道估计，偏移和其他校正。

公开(公告)号：US06850481B2

公开(公告)日：2005-02-01

申请号：US09751166

申请日：2000-12-29

申请人： Shiquan Wu ,  Wen Tong ,  Jianglei Ma

发明人： Shiquan Wu ,  Wen Tong ,  Jianglei Ma

IPC分类号： H04B7/06 ,  H04B7/08 ,  H04L1/06 ,  H04L25/02 ,  H04L27/26 ,  H04J11/00

CPC分类号： H04L25/0204 ,  H04B7/0669 ,  H04B7/0697 ,  H04B7/0845 ,  H04B7/0874 ,  H04B7/0894 ,  H04L1/0618 ,  H04L5/0048 ,  H04L25/022 ,  H04L25/0226 ,  H04L25/0232 ,  H04L27/2605 ,  H04L27/2662

摘要： The distortion in the sub-carrier signals is determined by transmitting known values that are incorporated into the preamble portion of the frame and/or are incorporated into pilot symbols that are inserted into the data portion of the frame. The receiver typically receives these known values in a distorted form and then processes the distorted values together with the original known values to obtain a channel response. The channel response is then used to estimate the frequencies at which the channels are received.

摘要翻译： 子载波信号中的失真是通过发送已被合并到帧的前同步码部分中的已知值和/或被合并到插入帧的数据部分的导频符号中来确定的。 接收机通常以失真形式接收这些已知值，然后将失真值与原始已知值一起处理以获得信道响应。 然后使用信道响应来估计频道被接收的频率。

公开(公告)号：US20070274408A1

公开(公告)日：2007-11-29

申请号：US11798342

申请日：2007-05-14

申请人： Jianglei Ma ,  Wen Tong ,  Shiquan Wu

发明人： Jianglei Ma ,  Wen Tong ,  Shiquan Wu

IPC分类号： H04K1/10

CPC分类号： H04B7/0619 ,  H04B7/0413 ,  H04B7/0669 ,  H04B7/0684 ,  H04B7/0691 ,  H04B7/0697 ,  H04B7/0845 ,  H04B7/0874 ,  H04B7/0894 ,  H04L1/0618 ,  H04L5/0023 ,  H04L5/0026 ,  H04L5/0048 ,  H04L5/0053 ,  H04L25/0204 ,  H04L25/0226 ,  H04L27/2605 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2662

摘要： One or more preambles are inserted into frames of Orthogonal Frequency Multiplexing (OFDM)-Multiple Input, Multiple Output (MIMO) signals. The preamble is received by the antennas of a receiver, decoded and compared to known values to provide synchronization, framing, channels estimation, offsets and other corrections to the transmitted signal.

摘要翻译： 将一个或多个前导码插入到正交频分复用（OFDM） - 多输入多输出（MIMO）信号的帧中。 前导码由接收机的天线接收，被解码并与已知值进行比较，以向发送的信号提供同步，成帧，信道估计，偏移和其他校正。

公开(公告)号：US08264996B2

公开(公告)日：2012-09-11

申请号：US12684540

申请日：2010-01-08

申请人： Shiquan Wu ,  Wen Tong ,  Claude Royer ,  Edward Sich

发明人： Shiquan Wu ,  Wen Tong ,  Claude Royer ,  Edward Sich

IPC分类号： G08C17/00

CPC分类号： H04W52/0216 ,  H04B1/7103 ,  H04B2201/70714 ,  H04L5/0016 ,  H04L27/2618 ,  H04L27/2647 ,  H04L27/265 ,  H04W52/0229 ,  Y02D70/122 ,  Y02D70/1242

摘要： Wireless devices, transmitters, systems and methods are provided that have a narrow band signalling channel and a wide band channel, for example an OFDM channel. In order to save power, the wireless device is nominally powered down with the exception of a receiver specific to the narrow band signalling channel. Once instructed to do so over the narrow band signalling channel, the wireless device wakes up the rest of its wide band receive circuitry.

摘要翻译： 提供了具有窄带信令信道和宽带信道（例如OFDM信道）的无线设备，发射机，系统和方法。 为了节省电力，除了窄带信令信道专用的接收机之外，无线设备名义上关闭电源。 一旦通过窄带信令信道指示这样做，无线设备唤醒其宽带接收电路的其余部分。

公开(公告)号：US07801019B2

公开(公告)日：2010-09-21

申请号：US11582663

申请日：2006-10-17

申请人： Shiquan Wu ,  Wen Tong ,  Leo Strawczynski

发明人： Shiquan Wu ,  Wen Tong ,  Leo Strawczynski

IPC分类号： H04J11/00

CPC分类号： H04B7/068 ,  H04B7/0417 ,  H04B7/063 ,  H04B7/0669 ,  H04B7/0689 ,  H04B7/0697 ,  H04B7/0891 ,  H04L1/0001 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/0625 ,  H04L1/0631 ,  H04L1/0662 ,  H04L1/0675 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0025 ,  H04L5/0026 ,  H04L5/0046 ,  H04L5/006 ,  H04L27/0008 ,  H04L27/2604 ,  H04L27/2628 ,  H04L27/2646 ,  H04L27/2647

摘要： An adaptable orthogonal frequency-division multiplexing system (OFDM) that uses a multiple input multiple output (MIMO) to having OFDM signals transmitted either in accordance with time diversity to reducing signal fading or in accordance with spatial diversity to increase the data rate. Sub-carriers are classified for spatial diversity transmission or for time diversity transmission based on the result of a comparison between threshold values and at least one of three criteria. The criteria includes a calculation of a smallest eigen value of a frequency channel response matrix and a smallest element of a diagonal of the matrix and a ratio of the largest and smallest eigen values of the matrix.

公开(公告)号：US07688710B2

公开(公告)日：2010-03-30

申请号：US11899860

申请日：2007-09-07

申请人： Shiquan Wu ,  Wen Tong ,  Leo Strawczynski

发明人： Shiquan Wu ,  Wen Tong ,  Leo Strawczynski

IPC分类号： H04J11/00

CPC分类号： H04B7/068 ,  H04B7/0417 ,  H04B7/063 ,  H04B7/0669 ,  H04B7/0689 ,  H04B7/0697 ,  H04B7/0891 ,  H04L1/0001 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/0625 ,  H04L1/0631 ,  H04L1/0662 ,  H04L1/0675 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0025 ,  H04L5/0026 ,  H04L5/0046 ,  H04L5/006 ,  H04L27/0008 ,  H04L27/2604 ,  H04L27/2628 ,  H04L27/2646 ,  H04L27/2647

摘要： An adaptable orthogonal frequency-division multiplexing system (OFDM) that uses a multiple input multiple output (MIMO) to having OFDM signals transmitted either in accordance with time diversity to reducing signal fading or in accordance with spatial diversity to increase the data rate. Sub-carriers are classified for spatial diversity transmission or for time diversity transmission based on the result of a comparison between threshold values and at least one of three criteria. The criteria includes a calculation of a smallest eigen value of a frequency channel response matrix and a smallest element of a diagonal of the matrix and a ratio of the largest and smallest eigen values of the matrix.

摘要翻译： 一种适应性正交频分复用系统（OFDM），其使用多输入多输出（MIMO）来具有根据时间分集发送的OFDM信号以减少信号衰落或者根据空间分集来增加数据速率。 基于阈值与三个标准中的至少一个的比较的结果，将子载波分类为空间分集发送或时间分集发送。 标准包括计算频道响应矩阵的最小本征值和矩阵的对角线的最小元素以及矩阵的最大和最小本征值的比率。

公开(公告)号：US11979220B2

公开(公告)日：2024-05-07

申请号：US18115851

申请日：2023-03-01

申请人： Jianglei Ma ,  Ming Jia ,  Peiying Zhu ,  Wen Tong

发明人： Jianglei Ma ,  Ming Jia ,  Peiying Zhu ,  Wen Tong

IPC分类号： H04B7/185

CPC分类号： H04B7/18513 ,  H04B7/18517 ,  H04B7/18526 ,  H04B7/18539 ,  H04B7/18558

摘要： The present disclosure relates, in part, to non-terrestrial communication systems, and in some embodiments to the integration of terrestrial and non-terrestrial communication systems. Non-terrestrial communication systems can provide a more flexible communication system with extended wireless coverage range and enhanced service quality compared to conventional communication systems. A method representative of aspects of the present application includes receiving, by an apparatus connected in a first sub-system, from a radio access network, configuration information for performing a channel condition measurement on a second sub-system, reporting, by the apparatus to the radio access network, channel condition measurement of a downlink reference signal received from the second sub-system, transmitting, by the apparatus, a wireless transmission to the second sub-system responsive to the channel condition measurement meeting a predefined condition.

公开(公告)号：US11799607B2

公开(公告)日：2023-10-24

申请号：US17351191

申请日：2021-06-17

申请人： Kelvin Kar Kin Au ,  Liqing Zhang ,  Mohammadhadi Baligh ,  Jianglei Ma ,  Wen Tong

发明人： Kelvin Kar Kin Au ,  Liqing Zhang ,  Mohammadhadi Baligh ,  Jianglei Ma ,  Wen Tong

IPC分类号： H04L5/00 ,  H04W74/00

CPC分类号： H04L5/0051 ,  H04W74/006 ,  H04L5/0073

摘要： A method and system for operating a user equipment (UE) wherein a first set of radio access procedures are supported when the UE is in a first operating state, and a second set of radio access procedures are supported when the UE is in a second operating state.