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    Adaptive weight update method and system for a discrete multitone spread spectrum communications system
    12.
    发明授权
    Adaptive weight update method and system for a discrete multitone spread spectrum communications system 失效

    公开(公告)号：US5923700A

    公开(公告)日：1999-07-13

    申请号：US804616

    申请日：1997-02-24

    申请人： Hongliang Zhang

    发明人： Hongliang Zhang

    IPC分类号： H04B1/707 ,  H04L5/02 ,  H04B15/00 ,  H04B1/38 ,  H04K1/00

    CPC分类号： H04L5/026 ,  H04B1/707 ,  H04L1/0003

    摘要： A new method makes the most efficient use of the scarce spectral bandwidth in a wireless discrete multitone spread spectrum communications system by updating the spectral and/or spatial spreading weights at a rate that is determined by the measured quality of the link. Low quality links require more frequent updates of the spreading weights than do higher quality links. Spreading weights and despreading weights for a station are adaptively updated, depending on the error in received signals. If the error value is less than a threshold error value, then the method maintains the existing spreading weights as the current spreading weights to apply to an outgoing data signal. Alternately, if the error value is greater than the threshold error value, then the method adaptively calculates updated despreading weights at the base station from the first spread signal and calculates updated spreading weights as the current spreading weights from the updated despreading weights to apply to the outgoing data signal.

    DIGITAL PHOTO FRAME HAVING A BUILT-IN SCANNER
    13.
    发明申请
    DIGITAL PHOTO FRAME HAVING A BUILT-IN SCANNER 审中-公开
    具有内置扫描仪的数码相框

    公开(公告)号：US20100149147A1

    公开(公告)日：2010-06-17

    申请号：US12610451

    申请日：2009-11-02

    申请人： Hongliang Zhang ,  Jung-Chou Lin

    发明人： Hongliang Zhang ,  Jung-Chou Lin

    IPC分类号： G09G5/00 ,  H04N1/04 ,  G09G3/36

    CPC分类号： H04N1/48

    摘要： The present invention relates to a digital photo frame, which includes a scanner to convert a picture into an image data file, wherein the scanner is a sheetfed scanner, and the scanner can reduce the scanning size limitations of a flatbed scanner and to promote the utility of the digital photo frame.

    摘要翻译： 数字相框技术领域本发明涉及一种数码相框，其包括将图像转换为图像数据文件的扫描器，其中扫描器是单张纸扫描仪，并且扫描仪可以减少平板扫描器的扫描尺寸限制并且促进效用 的数码相框。

    Methods and apparatus for use in reducing residual phase error in OFDM communication signals
    16.
    发明授权
    Methods and apparatus for use in reducing residual phase error in OFDM communication signals 有权
    用于减少OFDM通信信号中的残余相位误差的方法和装置

    公开(公告)号：US07548587B2

    公开(公告)日：2009-06-16

    申请号：US11167385

    申请日：2005-06-27

    申请人： Hongliang Zhang

    发明人： Hongliang Zhang

    IPC分类号： H04L27/28

    CPC分类号： H04L27/2695 ,  H04L27/266 ,  H04L27/2679

    摘要： Methods and apparatus for use in reducing residual phase error (RPE) in orthogonal frequency division multiplexed (OFDM) communication signals are described. One method includes the steps of calculating a phase of each one of a plurality of channel-compensated data symbols to generate a plurality of data symbol phases; performing a hard-decision on each one of the plurality of channel-compensated data symbols to estimate a plurality of information symbols; calculating a phase of each one of the plurality of information symbols to generate a plurality of information symbol phases; calculating a phase difference between each data symbol phase and its associated information symbol phase to generate a plurality of phase differences; and determining a residual phase error based on the plurality of phase differences.

    摘要翻译： 描述了用于减少正交频分复用（OFDM）通信信号中的残余相位误差（RPE）的方法和装置。 一种方法包括以下步骤：计算多个信道补偿数据符号中的每一个的相位以产生多个数据符号相位; 对所述多个信道补偿数据符号中的每一个执行硬判定，以估计多个信息符号; 计算所述多个信息符号中的每一个的相位以产生多个信息符号相位; 计算每个数据符号相位与其相关信息符号相位之间的相位差以产生多个相位差; 以及基于所述多个相位差确定残余相位误差。

    Methods and apparatus for use in reducing residual phase error in OFDM communication signals
    18.
    发明申请
    Methods and apparatus for use in reducing residual phase error in OFDM communication signals 有权

    公开(公告)号：US20050276254A1

    公开(公告)日：2005-12-15

    申请号：US11167385

    申请日：2005-06-27

    申请人： Hongliang Zhang

    发明人： Hongliang Zhang

    IPC分类号： H04L27/26 ,  H04J11/00

    CPC分类号： H04L27/2695 ,  H04L27/266 ,  H04L27/2679

    摘要： Methods and apparatus for use in reducing residual phase error (RPE) in orthogonal frequency division multiplexed (OFDM) communication signals are described. One method includes the steps of calculating a phase of each one of a plurality of channel-compensated data symbols to generate a plurality of data symbol phases; performing a hard-decision on each one of the plurality of channel-compensated data symbols to estimate a plurality of information symbols; calculating a phase of each one of the plurality of information symbols to generate a plurality of information symbol phases; calculating a phase difference between each data symbol phase and its associated information symbol phase to generate a plurality of phase differences; and determining a residual phase error based on the plurality of phase differences.

    Adaptive weight update method and system for a discrete multitone spread spectrum communications system
    19.
    发明授权
    Adaptive weight update method and system for a discrete multitone spread spectrum communications system 失效
    用于离散多音频扩频通信系统的自适应权重更新方法和系统

    公开(公告)号：US06975668B2

    公开(公告)日：2005-12-13

    申请号：US09999048

    申请日：2001-11-15

    申请人： Hongliang Zhang

    发明人： Hongliang Zhang

    IPC分类号： H04B1/707 ,  H04L5/02 ,  H04B1/38 ,  H04B15/00 ,  H04K1/00

    CPC分类号： H04L5/026 ,  H04B1/707 ,  H04B7/0848 ,  H04L1/0003 ,  H04L1/0015 ,  H04L1/203 ,  H04L5/0026 ,  H04L5/006 ,  H04L5/0064 ,  H04L25/0228 ,  H04L27/0008 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03426

    摘要： A new method makes the most efficient use of the scarce spectral bandwidth in a wireless discrete multitone spread spectrum communications system by updating the spectral and/or spatial spreading weights at a rate that is determined by the measured quality of the link. Low quality links require more frequent updates of the spreading weights than do higher quality links. Spreading weights and despreading weights for a station are adaptively updated, depending on the error in received signals. If the error value is less than a threshold error value, then the method maintains the existing spreading weights as the current spreading weights to apply to an outgoing data signal. Alternately, if the error value is greater than the threshold error value, then the method adaptively calculates updated despreading weights at the base station from the first spread signal and calculates updated spreading weights as the current spreading weights from the updated despreading weights to apply to the outgoing data signal.

    摘要翻译： 一种新的方法通过以由测量的链路质量确定的速率更新频谱和/或空间扩展权重来最有效地利用无线离散多音频扩频通信系统中的稀疏频谱带宽。 低质量链接需要更频繁地更新扩展权重，而不是更高质量的链接。 根据接收到的信号中的错误，自适应地更新站点的扩展权重和解扩权重。 如果误差值小于阈值误差值，则该方法将现有扩展权重维持为当前扩展权重以应用于输出数据信号。 或者，如果误差值大于阈值误差值，则该方法从第一扩展信号自适应地计算基站处的更新的解扩权重，并根据更新的解扩权重计算更新的扩展权重，以应用于 输出数据信号。

    Frequency band adaptive wireless communication
    20.
    发明授权
    Frequency band adaptive wireless communication 有权
    频段自适应无线通信

    公开(公告)号：US08583047B2

    公开(公告)日：2013-11-12

    申请号：US13540530

    申请日：2012-07-02

    申请人： Hongliang Zhang ,  Mark McDiarmid

    发明人： Hongliang Zhang ,  Mark McDiarmid

    IPC分类号： H04B15/00

    CPC分类号： H04W72/0453 ,  H04L1/0006 ,  H04L1/04 ,  H04L5/003 ,  H04L5/006 ,  H04W24/08 ,  H04W72/085

    摘要： A system, apparatus and method is disclosed for multiband wireless communication. Frequency bands and/or transmission formats are identified as available within a range for wireless communication. Signal quality metrics for each frequency band are evaluated by a receiver to identify qualified frequency bands. The qualified frequency bands can be ranked according to one or more signal quality metrics, where the list of qualified bands can be communicated to a transmitter. The transmitter is arranged to evaluate the list of qualified bands and select a communication method based on the available frequency bands and a selected communication optimization scenario. Multiple frequency bands and communication methods can be utilized by the transmitter such that a combination of licensed, unlicensed, semilicensed, and overlapped frequency bands can be simultaneously used for communication. The receiver continually monitors communications and can report link performance to the transmitter for adaptive control of the selected communication methods.

    摘要翻译： 公开了一种用于多频带无线通信的系统，装置和方法。 频带和/或传输格式在无线通信的范围内被识别为可用。 每个频带的信号质量度量由接收机评估以识别合格的频带。 可以根据一个或多个信号质量度量对合格的频带进行排序，其中合格频带的列表可以被传送到发射机。 发射机被设置为评估合格频带的列表，并且基于可用频带和所选择的通信优化场景选择通信方法。 多个频带和通信方法可以被发射机利用，使得许可的，非许可的，半精密的和重叠的频带的组合可以同时用于通信。 接收机连续监视通信，并可以向发射机报告链路性能，以便对所选择的通信方法进行自适应控制。