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    System and method for time synchronization of OFDM-based communications
    1.
    发明授权
    System and method for time synchronization of OFDM-based communications 有权
    基于OFDM的通信时间同步的系统和方法

    公开(公告)号：US08451957B2

    公开(公告)日：2013-05-28

    申请号：US12421536

    申请日：2009-04-09

    申请人： Pan Zhengang ,  Tao Li ,  Yiqing Zhou ,  Man Wai Kwan

    发明人： Pan Zhengang ,  Tao Li ,  Yiqing Zhou ,  Man Wai Kwan

    IPC分类号： H04L27/06

    CPC分类号： H04L27/2671 ,  H04L27/2663 ,  H04L27/2678 ,  H04L27/2688

    摘要： Systems and methods for time synchronization of orthogonal frequency-division multiplexing (OFDM)-based communications are disclosed. A cyclic prefix (CP) correlation-based timing synchronization method is disclosed for early path (e.g. first-received path) detection for OFDM-based communication. Systems and methods are disclosed for performing double peak value detection in an OFDM-based system for reliably detecting an early (e.g., first-received) path in a received OFDM symbol for use in timing synchronization. In the double peak value detection method, a first peak value detection is performed to detect the path with the largest power, and a second peak value detection is then performed to detect a desired early (e.g., first-received) path. A compensation linear curve is used to facilitate the second peak value detection.

    摘要翻译： 公开了用于基于正交频分复用（OFDM）的通信的时间同步的系统和方法。 针对基于OFDM的通信的早期路径（例如，第一接收路径）检测公开了一种基于循环前缀（CP）相关的定时同步方法。 公开了用于在基于OFDM的系统中执行双峰值检测的系统和方法，用于可靠地检测用于定时同步的接收的OFDM符号中的早期（例如，第一接收）路径。 在双峰值检测方法中，执行第一峰值检测以检测具有最大功率的路径，然后执行第二峰值检测以检测期望的早（例如，第一接收）路径。 使用补偿线性曲线来促进第二峰值检测。

    Channel estimation techniques for OFDM
    2.
    发明授权
    Channel estimation techniques for OFDM 有权
    OFDM的信道估计技术

    公开(公告)号：US08737546B2

    公开(公告)日：2014-05-27

    申请号：US12428670

    申请日：2009-04-23

    申请人： Pan Zhengang ,  Man Wai Kwan ,  Yiqing Zhou ,  Tao Li

    发明人： Pan Zhengang ,  Man Wai Kwan ,  Yiqing Zhou ,  Tao Li

    IPC分类号： H04B1/10

    CPC分类号： H04L25/0232 ,  H04L25/022 ,  H04L25/025 ,  H04L27/2647

    摘要： An Orthogonal Frequency Division Multiplexing (OFDM) receiver comprises: a channel estimator receiving a signal that includes a plurality of symbols, each of the symbols including a plurality of pilots and a plurality of data subcarriers, wherein each symbol further includes at least one pilot subcarrier, the estimator using a first channel response estimate of the at least one pilot subcarrier in a first symbol to select a first weight matrix from a plurality of pre-generated weight matrices, and generating channel estimation information for data subcarriers in the first symbol using the selected first weight matrix.

    摘要翻译： 正交频分复用（OFDM）接收机包括：信道估计器，其接收包括多个符号的信号，每个符号包括多个导频和多个数据子载波，其中每个符号还包括至少一个导频子载波 所述估计器使用第一符号中的所述至少一个导频子载波的第一信道响应估计来从多个预先生成的加权矩阵中选择第一权重矩阵，并且使用所述第一符号中的数据子载波生成信道估计信息， 选择第一加权矩阵。

    Channel Estimation Techniques for OFDM
    3.
    发明申请
    Channel Estimation Techniques for OFDM 有权
    OFDM的信道估计技术

    公开(公告)号：US20100272194A1

    公开(公告)日：2010-10-28

    申请号：US12428670

    申请日：2009-04-23

    申请人： Pan Zhengang ,  Man W. Kwan ,  Yiqing Zhou ,  Tao Li

    发明人： Pan Zhengang ,  Man W. Kwan ,  Yiqing Zhou ,  Tao Li

    IPC分类号： H04K1/10

    CPC分类号： H04L25/0232 ,  H04L25/022 ,  H04L25/025 ,  H04L27/2647

    摘要： An Orthogonal Frequency Division Multiplexing (OFDM) receiver comprises: a channel estimator receiving a signal that includes a plurality of symbols, each of the symbols including a plurality of pilots and a plurality of data subcarriers, wherein each symbol further includes at least one pilot subcarrier, the estimator using a first channel response estimate of the at least one pilot subcarrier in a first symbol to select a first weight matrix from a plurality of pre-generated weight matrices, and generating channel estimation information for data subcarriers in the first symbol using the selected first weight matrix.

    摘要翻译： 正交频分复用（OFDM）接收机包括：信道估计器，其接收包括多个符号的信号，每个符号包括多个导频和多个数据子载波，其中每个符号还包括至少一个导频子载波 所述估计器使用第一符号中的所述至少一个导频子载波的第一信道响应估计来从多个预先生成的加权矩阵中选择第一权重矩阵，并且使用所述第一符号中的数据子载波生成信道估计信息， 选择第一加权矩阵。

    OFDM SYMBOL STRUCTURE FOR POWER LINE COMMUNICATION
    4.
    发明申请
    OFDM SYMBOL STRUCTURE FOR POWER LINE COMMUNICATION 有权
    用于电力线通信的OFDM符号结构

    公开(公告)号：US20120170670A1

    公开(公告)日：2012-07-05

    申请号：US12980353

    申请日：2010-12-29

    申请人： Pan Zhengang ,  Huang Yuanliang ,  Xiaoshuo Chen ,  Shaohua Zhao

    发明人： Pan Zhengang ,  Huang Yuanliang ,  Xiaoshuo Chen ,  Shaohua Zhao

    IPC分类号： H04B3/00

    CPC分类号： H04B3/542 ,  H04B2203/5408 ,  H04B2203/5416 ,  H04J11/003 ,  H04L5/0062 ,  H04L25/03343 ,  H04L27/2605 ,  H04L27/2627 ,  H04L27/2646

    摘要： A method for packing data over a power line communication channel is disclosed herein. The method comprises packing data into symbol body, adding a first pad in front of the symbol body to form a full symbol and determining the time instance in which the peak absolute voltage point of the AC electric power occurs. And subsequently it is to send the full symbol through the power line in a manner synchronized with the time instance aforesaid. Based on the interference condition detection, the invention allows receiver side adaptation.

    摘要翻译： 本文公开了一种用于在电力线通信信道上打包数据的方法。 该方法包括将数据打包到符号体中，在符号体前面添加第一个焊盘以形成完整的符号，并确定发生交流电的峰值绝对电压点的时间实例。 随后，以与上述时间实例同步的方式通过电力线发送完整符号。 基于干扰条件检测，本发明允许接收机侧适应。

    SYSTEM AND METHOD FOR TIME SYNCHRONIZATION OF OFDM-BASED COMMUNICATIONS
    5.
    发明申请
    SYSTEM AND METHOD FOR TIME SYNCHRONIZATION OF OFDM-BASED COMMUNICATIONS 有权
    基于OFDM通信的时间同步的系统与方法

    公开(公告)号：US20100260294A1

    公开(公告)日：2010-10-14

    申请号：US12421536

    申请日：2009-04-09

    申请人： Pan Zhengang ,  Tao Li ,  Yiqing Shou ,  Man W. Kwan

    发明人： Pan Zhengang ,  Tao Li ,  Yiqing Shou ,  Man W. Kwan

    IPC分类号： H04L27/06

    CPC分类号： H04L27/2671 ,  H04L27/2663 ,  H04L27/2678 ,  H04L27/2688

    摘要： Systems and methods for time synchronization of orthogonal frequency-division multiplexing (OFDM)-based communications are disclosed. A cyclic prefix (CP) correlation-based timing synchronization method is disclosed for early path (e.g. first-received path) detection for OFDM-based communication. Systems and methods are disclosed for performing double peak value detection in an OFDM-based system for reliably detecting an early (e.g., first-received) path in a received OFDM symbol for use in timing synchronization. In the double peak value detection method, a first peak value detection is performed to detect the path with the largest power, and a second peak value detection is then performed to detect a desired early (e.g., first-received) path. A compensation linear curve is used to facilitate the second peak value detection.

    摘要翻译： 公开了用于基于正交频分复用（OFDM）的通信的时间同步的系统和方法。 针对基于OFDM的通信的早期路径（例如，第一接收路径）检测公开了一种基于循环前缀（CP）相关的定时同步方法。 公开了用于在基于OFDM的系统中执行双峰值检测的系统和方法，用于可靠地检测用于定时同步的接收的OFDM符号中的早期（例如，第一接收）路径。 在双峰值检测方法中，执行第一峰值检测以检测具有最大功率的路径，然后执行第二峰值检测以检测期望的早（例如，第一接收）路径。 使用补偿线性曲线来促进第二峰值检测。

    Accurate Channel Quality Indicator for Link Adaptation of MIMO Communication Systems
    7.
    发明申请
    Accurate Channel Quality Indicator for Link Adaptation of MIMO Communication Systems 有权
    MIMO通信系统链路自适应的准确信道质量指标

    公开(公告)号：US20090067557A1

    公开(公告)日：2009-03-12

    申请号：US11851295

    申请日：2007-09-06

    申请人： Pan Zhengang ,  Chan Wingchau ,  Zhao Xueyuan ,  Lo Chiming ,  Nejib Boubaker

    发明人： Pan Zhengang ,  Chan Wingchau ,  Zhao Xueyuan ,  Lo Chiming ,  Nejib Boubaker

    IPC分类号： H03D1/04

    CPC分类号： H04L1/20 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0016 ,  H04L1/0025 ,  H04L1/0618

    摘要： A method for performing link adaptation in a Multiple Input Multiple Output (MIMO) system comprises: receiving a signal at a receiving unit of the MIMO system, calculating channel state information (CSI) from the received signal, and calculating a plurality of values of a parameter from the CSI, the parameter mapping to an error rate of the system, the mapping being substantially one-to-one within a range of interest of the error rate, each one of the calculated values corresponding to one of a plurality of Modulation Coding Schemes (MCSs).

    摘要翻译： 一种用于在多输入多输出（MIMO）系统中执行链路自适应的方法包括：在MIMO系统的接收单元处接收信号，从接收信号计算信道状态信息（CSI），并计算多个值 参数映射到系统的错误率，映射在错误率的关注范围内基本上是一对一的，所计算的值中的每一个对应于多个调制编码中的一个 方案（MCS）。