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    • 3. 发明授权
    • Heusristics for optimum beta factor and filter order determination in echo canceler systems
    • 用于回波消除器系统中的最佳β因子和滤波器阶数确定的理论
    • US06687373B1
    • 2004-02-03
    • US09379698
    • 1999-08-24
    • Chiang YehWei-Jei Song
    • Chiang YehWei-Jei Song
    • H04M908
    • H04B3/23
    • A method, apparatus and system employing such for adapting the Beta factor in a echo cancellation adaptive filter by using echo loss return enhancement (ERLE) as a metric to determine the setting of the Beta factor. In addition, a method and apparatus for determining the optimum number of filter taps used in an adaptive filter by dividing a filter array into blocks of taps, finding for each tap the sum of squares of the coefficients therein and then comparing the sum to an average block energy. Based on this comparison, a block is deemed to either contribute significantly to the operation of the filter or not. Starting with the tail end block of the array, the optimum filter order is found by determining when the first contributing block is found.
    • 一种采用这样的方法,装置和系统,通过使用回波损耗返回增强(ERLE)作为度量来确定Beta因子的设置来使回波消除自适应滤波器中的β因子适应。 另外,一种用于通过将滤波器阵列划分成抽头块来确定在自适应滤波器中使用的滤波器抽头的最佳数目的方法和装置,为每个抽头找出其中的系数的平方和,然后将该和与平均值进行比较 阻挡能量。 基于该比较,块被认为对于过滤器的操作有显着的贡献。 从阵列的尾端块开始,通过确定何时找到第一个贡献块来找到最佳滤波器顺序。
    • 7. 发明授权
    • Timing adjustments in a communication system
    • 通信系统中的时序调整
    • US08730854B2
    • 2014-05-20
    • US12859089
    • 2010-08-18
    • Tao LuoDung Ngoc DoanWei-Jei SongDaniel T. Macek
    • Tao LuoDung Ngoc DoanWei-Jei SongDaniel T. Macek
    • H04B7/00
    • H04W56/00H04L27/2607H04L27/2655
    • Methods, systems, apparatus and computer program products are provided to improve synchronization of information units communicated in a wireless communication system. Timing misalignment in the transmission of adjacent information units can produce gaps or overlaps in the transmitted information. In a long-term evolution (LTE) wireless communication system, such gaps and overlaps can be eliminated or reduced by adjusting the lengths of a cyclic prefix portion of one or more transmitted symbols. This Abstract is provided for the sole purpose of complying with the Abstract requirement rules that allow a reader to quickly ascertain the disclosed subject matter. Therefore, it is to be understood that it should not be used to interpret or limit the scope or the meaning of the claims.
    • 提供方法,系统,装置和计算机程序产品以改善在无线通信系统中通信的信息单元的同步。 相邻信息单元的传输中的定时未对准可能在发送的信息中产生间隙或重叠。 在长期演进(LTE)无线通信系统中,可以通过调整一个或多个发送符号的循环前缀部分的长度来消除或减少这种间隙和重叠。 本摘要仅用于遵守允许读者快速确定所披露的主题的抽象要求规则。 因此,应当理解,它不应用于解释或限制权利要求书的范围或含义。
    • 8. 发明申请
    • TIMING ADJUSTMENTS IN A COMMUNICATION SYSTEM
    • 通信系统中的时序调整
    • US20110044188A1
    • 2011-02-24
    • US12859089
    • 2010-08-18
    • Tao LuoDung Ngoc DoanWei-Jei SongDaniel T. Macek
    • Tao LuoDung Ngoc DoanWei-Jei SongDaniel T. Macek
    • H04W24/00
    • H04W56/00H04L27/2607H04L27/2655
    • Methods, systems, apparatus and computer program products are provided to improve synchronization of information units communicated in a wireless communication system. Timing misalignment in the transmission of adjacent information units can produce gaps or overlaps in the transmitted information. In a long-term evolution (LTE) wireless communication system, such gaps and overlaps can be eliminated or reduced by adjusting the lengths of a cyclic prefix portion of one or more transmitted symbols. This Abstract is provided for the sole purpose of complying with the Abstract requirement rules that allow a reader to quickly ascertain the disclosed subject matter. Therefore, it is to be understood that it should not be used to interpret or limit the scope or the meaning of the claims.
    • 提供方法,系统,装置和计算机程序产品以改善在无线通信系统中通信的信息单元的同步。 相邻信息单元的传输中的定时未对准可能在发送的信息中产生间隙或重叠。 在长期演进(LTE)无线通信系统中,可以通过调整一个或多个发送符号的循环前缀部分的长度来消除或减少这种间隙和重叠。 本摘要仅用于遵守允许读者快速确定所披露的主题的抽象要求规则。 因此,应当理解,它不应用于解释或限制权利要求书的范围或含义。