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25 条记录 (耗时 0.02 秒)

    Method for detecting symbol synchronization and apparatus thereof
    3.
    发明授权
    Method for detecting symbol synchronization and apparatus thereof 有权
    符号同步检测方法及其装置

    公开(公告)号：US07577168B2

    公开(公告)日：2009-08-18

    申请号：US11198598

    申请日：2005-08-04

    申请人： Taehyun Jeon ,  Heejung Yu ,  Myung-Soon Kim ,  Eun-Young Choi ,  Sok-Kyu Lee ,  Deuk-Su Lyu

    发明人： Taehyun Jeon ,  Heejung Yu ,  Myung-Soon Kim ,  Eun-Young Choi ,  Sok-Kyu Lee ,  Deuk-Su Lyu

    IPC分类号： H04J3/06

    CPC分类号： H04L27/2662 ,  H04L27/2675

    摘要： An apparatus for detecting symbol synchronization in a received signal including a first preamble and a second preamble which is consecutive to the first preamble, the apparatus including a first correlator calculating a first correlation value between the received signal and a first pattern of a first period among iterative patterns of the first preamble, a second correlator calculating a second correlation value between the received signal and a second pattern of a second period among iterative patterns of the second preamble, a third correlator calculating a third correlation value between the first correlation value and the second correlation value, and a detector detecting symbol synchronization from the third correlation value.

    摘要翻译： 一种用于检测包括与第一前导码连续的第一前导码和第二前同步码的接收信号中符号同步的装置，该装置包括：第一相关器，用于计算接收信号与第一周期中的第一相似值之间的第一相关值， 所述第一前导码的迭代模式，第二相关器，计算所述接收信号与所述第二前导码的迭代模式之间的第二周期的第二模式之间的第二相关值;第三相关器，计算所述第一相关值与所述第一相关值之间的第三相关值， 第二相关值，以及检测器，从第三相关值检测符号同步。

    Phase modulation apparatus and method
    5.
    发明授权
    Phase modulation apparatus and method 有权
    相位调制装置及方法

    公开(公告)号：US08358178B2

    公开(公告)日：2013-01-22

    申请号：US12833281

    申请日：2010-07-09

    申请人： Myung-Soon Kim

    发明人： Myung-Soon Kim

    IPC分类号： H03C3/00 ,  H04B1/00

    CPC分类号： H03C3/0925 ,  H03C3/0941 ,  H03C3/095 ,  H03C3/0966 ,  H03C3/0975

    摘要： A phase modulation apparatus and method are provided. The phase modulation apparatus includes a storage to store phase modulation setting values corresponding to various communication modes; a phase modulation setting value selector to select, when a communication mode is changed, phase modulation setting values corresponding to the changed communication mode among the phase modulation setting values stored in the storage; and a phase modulator to modulate a phase of a transmission signal using the phase modulation setting values selected by the phase modulation setting value selector. According to the phase modulation apparatus, since a frequency characteristic of a loop filter in a PLL circuit is changed depending on a transmission mode of a communication apparatus and phase modulation is performed using appropriate bandwidths according to various transmission modes, it is possible to prevent noise characteristics from degrading when a PLL bandwidth changes.

    摘要翻译： 提供了相位调制装置和方法。 相位调制装置包括：存储器，用于存储与各种通信模式对应的相位调制设定值; 相位调制设定值选择器，当通信模式改变时，选择存储在所述存储器中的所述相位调制设定值中与所述改变的通信模式对应的相位调制设定值; 以及使用由相位调制设定值选择器选择的相位调制设定值来调制发送信号的相位的相位调制器。 根据相位调制装置，由于PLL电路中的环路滤波器的频率特性根据通信装置的发送模式而变化，并且根据各种发送模式使用适当的带宽进行相位调制，因此可以防止噪声 当PLL带宽变化时，降级特性。

    Automatic gain control method in wireless packet communication system
    7.
    发明授权
    Automatic gain control method in wireless packet communication system 失效
    无线分组通信系统中的自动增益控制方法

    公开(公告)号：US07403757B2

    公开(公告)日：2008-07-22

    申请号：US11223067

    申请日：2005-09-08

    申请人： Heejung Yu ,  Taehyun Jeon ,  Myung-Soon Kim ,  Eun-Young Choi ,  Sok-Kyu Lee ,  Deuk-Su Lyu

    发明人： Heejung Yu ,  Taehyun Jeon ,  Myung-Soon Kim ,  Eun-Young Choi ,  Sok-Kyu Lee ,  Deuk-Su Lyu

    IPC分类号： H04B1/06

    CPC分类号： H03G3/30 ,  H03G2201/103 ,  H03G2201/202 ,  H03G2201/302

    摘要： The present invention relates to an automatic gain controller in a wireless packet communication system and an automatic gain control method thereof. The automatic gain controller includes a variable gain amplifier, a signal saturation determining unit, a power calculator, and a gain controller. The gain controller includes a first gain selector and a second gain selector. In the automatic gain control method, an establishment gain of a variable gain amplifier is reduced when the number of samples greater than a predetermined reference is greater than a predetermined number. After a received power value is measured, the establishment gain is controlled by a difference between the received power value and a reference power value.

    摘要翻译： 本发明涉及一种无线分组通信系统中的自动增益控制器及其自动增益控制方法。 自动增益控制器包括可变增益放大器，信号饱和确定单元，功率计算器和增益控制器。 增益控制器包括第一增益选择器和第二增益选择器。 在自动增益控制方法中，当大于预定参考值的采样数大于预定数量时，减小可变增益放大器的建立增益。 在测量接收功率值之后，通过接收功率值和参考功率值之间的差来控制建立增益。