公开(公告)号：US07564927B2

公开(公告)日：2009-07-21

申请号：US11162831

申请日：2005-09-25

Applicant: Kuo-Ming Wu ,  Der-Zheng Liu

Inventor： Kuo-Ming Wu ,  Der-Zheng Liu

IPC: H04L27/00

CPC classification number: H04L27/2657 ,  H04L2027/0026

Abstract: A band averaging circuit and a related method for estimating a carrier frequency offset are applied in a multi-band multi-carrier communication system. A packet of the multi-band multi-carrier communication system is transmitted via a plurality of carriers. The band averaging circuit includes a frequency offset estimation unit for generating a plurality of carrier frequency offset ratios corresponding to the carriers according to a received packet; and a frequency offset adjustment circuit coupled to the frequency offset estimation unit for calculating a weighted average carrier frequency offset ratio according to carrier frequency offset ratios and comparison results of the carrier frequency offset ratios, and also for calculating a carrier frequency offset of each carrier according to the weighted average carrier frequency offset ratio and a center frequency of the carrier.

Abstract translation: 用于估计载波频率偏移的频带平均电路和相关方法被应用在多频带多载波通信系统中。 经由多个载波发送多频带多载波通信系统的分组。 频带平均电路包括：频率偏移估计单元，用于根据接收的分组产生对应于载波的多个载波频率偏移比; 以及频率偏移调整电路，其耦合到所述频率偏移估计单元，用于根据载波频率偏移比和所述载波频率偏移比的比较结果计算加权平均载波频率偏移比，并且还用于根据载波频率偏移比来计算每个载波的载波频率偏移 加权平均载波频率偏移比和载波的中心频率。

公开(公告)号：US07558338B2

公开(公告)日：2009-07-07

申请号：US10649862

申请日：2003-08-28

Applicant: Der-Zheng Liu ,  Song-Nien Tung ,  Kuang-Yu Yen ,  Tai-Cheng Liu

Inventor： Der-Zheng Liu ,  Song-Nien Tung ,  Kuang-Yu Yen ,  Tai-Cheng Liu

IPC: H04L27/00

CPC classification number: H03D3/009 ,  H04B1/40 ,  H04L27/2627 ,  H04L27/2649 ,  H04L2027/0016 ,  H04L2027/0022

Abstract: An apparatus and method for estimating an I/Q imbalance parameter of a receiver and a transmitter. An apparatus for estimating an I/Q imbalance parameter of a receiver, the apparatus comprising: a signal generator; a transmitter; a receiver; and an estimator. An apparatus for estimating an I/Q imbalance parameter of a transmitter, the apparatus comprising: a signal generator; a transmitter; and an estimator.

Abstract translation: 一种用于估计接收机和发射机的I / Q不平衡参数的装置和方法。 一种用于估计接收机的I / Q不平衡参数的装置，所述装置包括：信号发生器; 发射机 接收器 和一个估计。 一种用于估计发射机的I / Q不平衡参数的装置，所述装置包括：信号发生器; 发射机 和一个估计。

公开(公告)号：US20080109369A1

公开(公告)日：2008-05-08

申请号：US11935386

申请日：2007-11-05

Applicant: Yi-Ling Su ,  Frey Waid ,  Rui Chen ,  Matthew Good ,  Franck Chastagnol ,  Jianliang Zhao ,  Zheng Liu ,  David King

Inventor： Yi-Ling Su ,  Frey Waid ,  Rui Chen ,  Matthew Good ,  Franck Chastagnol ,  Jianliang Zhao ,  Zheng Liu ,  David King

IPC: G06Q10/00 ,  G06F17/00 ,  G06Q30/00 ,  H04L9/28

CPC classification number: G06Q30/06 ,  G06Q10/06 ,  G06Q30/0273

Abstract: Content rights holders provide digital content to a hosting site to be used as reference content. The content owner specifies a policy for each digital content item, indicating how that content may be used on the site when uploaded by someone other than the content owner. An identification module compares the uploaded content against reference content. If the content matches reference content, the specified policy for that reference content is applied to the uploaded content. Policy options provided by the content owner include tracking the content to see how it is viewed, preventing the content from being distributed on the site, and allowing the content to be displayed in a revenue-sharing environment. In one embodiment, if the identification module matches the uploaded content to a reference item but the match does not have a sufficiently high level of confidence, the suggested match is queued for review by the content owner.

Abstract translation: 内容权利持有者将数字内容提供给托管站点以用作参考内容。 内容所有者为每个数字内容项目指定一个策略，指示当由内容所有者以外的人上传时，该内容可以在该网站上使用。 识别模块将上传的内容与参考内容进行比较。 如果内容与参考内容相匹配，则该引用内容的指定策略将应用于上传的内容。 内容所有者提供的策略选项包括跟踪内容以查看其内容，以防止在网站上分发内容，并允许内容在收益分享环境中显示。 在一个实施例中，如果识别模块将上传的内容与参考项匹配，但匹配没有足够高的置信度，则建议的匹配排队等待内容所有者审查。

公开(公告)号：US20080059993A1

公开(公告)日：2008-03-06

申请号：US11847590

申请日：2007-08-30

Applicant: Haibo Jia ,  Zheng Liu

Inventor： Haibo Jia ,  Zheng Liu

IPC: H04N7/169 ,  H04L12/28

CPC classification number: H04N7/1675 ,  H04N21/25816 ,  H04N21/25875 ,  H04N21/4627 ,  H04N21/6334

Abstract: A method for transmitting an authorization message to terminals includes: transmitting, through multicasting, an authorization message to a plurality of terminals on a transmission network, and. the authorization message carries a multicast address, a product identity and authorization data. A method for receiving an authorization message by a terminal includes receiving an authorization message, when authentication according to a multicast address succeeds; parsing the authorization message to obtain authorization data; and obtaining, from the authorization data, information of whether a subscriber has subscribed to a product. An authorization management system and a terminal device are disclosed as well. According to the above schemes, authorization is accomplished through group-based multicast, so the bandwidth requirement is reduced and time for transmitting the authorization message is saved.

Abstract translation: 向终端发送授权消息的方法包括：通过多播向多个终端发送授权消息，发送到传输网络， 授权消息携带多播地址，产品身份和授权数据。 一种终端接收授权消息的方法包括当根据多播地址进行认证成功时接收授权消息; 解析授权消息以获取授权数据; 以及从授权数据获取用户是否订购了产品的信息。 还公开了授权管理系统和终端设备。 根据上述方案，通过基于组播的组播来实现授权，减少了带宽需求，节省了发送授权消息的时间。

公开(公告)号：US07277503B2

公开(公告)日：2007-10-02

申请号：US10640034

申请日：2003-08-14

Applicant: Fong-Ching Huang ,  Der-Zheng Liu

Inventor： Fong-Ching Huang ,  Der-Zheng Liu

IPC: H03D3/18

CPC classification number: H04L27/2657 ,  H04L27/2662 ,  H04L27/2679

Abstract: An apparatus and method for synchronizing sampling frequencies of a receiver and a transmitter of a multi-carrier communication system is provided. The receiver includes an estimator for estimating a frequency offset by employing an additional angle rotation of a received signal in frequency domain. The apparatus includes a compensation loop filter for generating a first output in response to a frequency offset compensation, an adder for adding the estimated frequency offset and the first output to generate a second output, and a loop filter for generating frequency offset compensation according to the second output. The method repeatedly applies the apparatus to generate frequency offset compensation, and then feeds it back to an oscillator to compensate the sampling frequency of the receiver. The apparatus and method can also be applied to a communication system with a carrier frequency offset.

Abstract translation: 提供了一种用于同步多载波通信系统的接收机和发射机的采样频率的装置和方法。 接收机包括估计器，用于通过在频域中采用接收信号的附加角度旋转来估计频率偏移。 该装置包括：补偿环路滤波器，用于响应于频率偏移补偿产生第一输出;加法器，用于将估计的频率偏移和第一输出相加以产生第二输出;以及环路滤波器，用于根据 第二输出。 该方法重复应用该装置以产生频偏补偿，然后将其馈送到振荡器以补偿接收机的采样频率。 该装置和方法也可以应用于具有载波频率偏移的通信系统。

公开(公告)号：US07257078B2

公开(公告)日：2007-08-14

申请号：US10249557

申请日：2003-04-17

Applicant: Der-Zheng Liu ,  Shan-An Yang ,  Kuang-Yu Yen

Inventor： Der-Zheng Liu ,  Shan-An Yang ,  Kuang-Yu Yen

IPC: H04J11/00 ,  H04B7/216

CPC classification number: H04L25/022 ,  H04B17/20 ,  H04L25/0242 ,  H04L27/261

Abstract: An RF receiver includes a plurality of OFDM modules. The OFDM modules include receiver antennas for substantially simultaneously receiving a plurality of transmission signals transmitted via a single frequency band having a plurality of sub-channels. Further included is a channel estimation module connected to the plurality of OFDM modules, and a channel compensation module connected to the channel estimation module and the plurality of OFDM modules. For each sub-channel, the channel estimation module is capable of estimating channel frequency responses affecting the transmission signals, and the channel compensation module is capable of compensating the transmission signals according to the estimated channel frequency responses. The receiver allows an improved transfer rate per frequency band.

Abstract translation: RF接收机包括多个OFDM模块。 OFDM模块包括用于基本上同时接收经由具有多个子信道的单个频带发送的多个传输信号的接收机天线。 进一步包括连接到多个OFDM模块的信道估计模块，以及连接到信道估计模块和多个OFDM模块的信道补偿模块。 对于每个子信道，信道估计模块能够估计影响传输信号的信道频率响应，并且信道补偿模块能够根据估计的信道频率响应来补偿传输信号。 接收机允许每个频带改善传输速率。

公开(公告)号：US20070127607A1

公开(公告)日：2007-06-07

申请号：US11465452

申请日：2006-08-18

Applicant: Kuo-Ming Wu ,  Der-Zheng Liu ,  Kuang-Yu Yen

Inventor： Kuo-Ming Wu ,  Der-Zheng Liu ,  Kuang-Yu Yen

IPC: H04L27/06

CPC classification number: H04L27/2662 ,  H04B1/7183 ,  H04L27/2675

Abstract: The present invention relates to a symbol acquisition apparatus and a method thereof. The method includes: determining a first boundary according to a first preamble symbol and generating a first confidence value according to signal quality of the first preamble symbol; determining a second boundary according to a second preamble symbol and generating a second confidence value according to signal quality of the second preamble symbol; and determining a symbol boundary from the first and the second boundaries according to the first and the second confidence values.

Abstract translation: 符号获取装置及其方法技术领域本发明涉及符号获取装置及其方法。 该方法包括：根据第一前导码符号确定第一边界，并根据第一前导符号的信号质量产生第一置信度值; 根据第二前导码符号确定第二边界，并根据第二前导符号的信号质量产生第二置信度值; 以及根据第一和第二置信度从第一边界和第二边界确定符号边界。

公开(公告)号：US07143076B2

公开(公告)日：2006-11-28

申请号：US10022056

申请日：2001-12-12

Applicant: Paul N. Weinberg ,  Wenphing Lo ,  Zheng Liu ,  Ariel Hazi

Inventor： Paul N. Weinberg ,  Wenphing Lo ,  Zheng Liu ,  Ariel Hazi

IPC: G06F7/00

CPC classification number: G06F17/30569 ,  Y10S707/99931 ,  Y10S707/99943 ,  Y10S707/99945

Abstract: Embodiments of the invention comprise a method and apparatus for transforming data. Systems implementing the invention allow for loading the data from one or more source tables into one or more destination tables. The system allows for parsing source data fields, defining new source data fields, combining source fields to create source field combinations, and combining destination fields to create destination field combinations. The system allows for mapping source fields and values to destination fields and values, where either the source fields and values or destination fields and values may be field and value combinations, and allows for transforming field values based on destination field type. The tools provided in a system implementing the invention provide a user the ability to intervene at each step during the data transform task. A user may manually input a hierarchy definition, a specific mapping, define rules for combining data fields, or define rules for converting data values.

公开(公告)号：US20060215776A1

公开(公告)日：2006-09-28

申请号：US11307096

申请日：2006-01-23

Applicant: Kuo-Ming Wu ,  Der-Zheng Liu

Inventor： Kuo-Ming Wu ,  Der-Zheng Liu

IPC: H04K1/10

CPC classification number: H04L27/2662 ,  H04L27/2675 ,  H04L27/2695

Abstract: An apparatus and method for tracking a sampling clock are disclosed. The apparatus includes a compensating unit compensating phases of a first and a second received symbols according to a compensating signal and thereby generating a first and a second compensated symbols; a data removal module removing a first predetermined transmitted data from the first compensated symbol, and a second predetermined transmitted data from the second compensated symbol and thereby generating a first and a second data removal symbols; and a computing module generating a sampling clock offset according to the first and the second data removal symbols, and adjusting the sampling clock signal according to the sampling clock offset.

Abstract translation: 公开了一种跟踪采样时钟的装置和方法。 该装置包括：补偿单元，根据补偿信号补偿第一和第二接收符号的相位，从而生成第一和第二补偿符号; 从第一补偿符号去除第一预定发送数据的数据去除模块和来自第二补偿符号的第二预定发送数据，从而生成第一和第二数据去除符号; 以及计算模块，根据第一和第二数据去除符号生成采样时钟偏移量，并根据采样时钟偏移量调整采样时钟信号。

公开(公告)号：US20060029236A1

公开(公告)日：2006-02-09

申请号：US11161585

申请日：2005-08-09

Applicant: Kuo-Ming Wu ,  Der-Zheng Liu

Inventor： Kuo-Ming Wu ,  Der-Zheng Liu

IPC: H03G5/00 ,  H04B3/14 ,  H01P9/00

CPC classification number: H04L25/03057 ,  H04B1/71637 ,  H04B1/719 ,  H04L2025/03414

Abstract: An apparatus and a method for equalizing a received signal to generate an equalized signal are disclosed. The apparatus includes a channel estimator for generating a channel estimation value according to a preamble symbol in the received signal and for generating a channel response value according to the channel estimation value, an interference power estimation circuit for generating an interference power estimate according to a hard decision value, the channel response value, and the received signal, and an equalization circuit for equalizing the received signal according to the channel response value and the adjusted interference power estimate to generate the equalized signal. The hard decision value corresponds to the equalized signal.

Abstract translation: 公开了一种用于均衡接收信号以产生均衡信号的装置和方法。 该装置包括：信道估计器，用于根据接收信号中的前导码符号生成信道估计值，并根据信道估计值产生信道响应值;干扰功率估计电路，用于根据硬信号产生干扰功率估计 判定值，信道响应值和接收信号，以及用于根据信道响应值和调整后的干扰功率估计均衡接收信号以产生均衡信号的均衡电路。 硬判定值对应于均衡信号。