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    Residual frequency, phase, timing offset and signal amplitude variation tracking apparatus and methods for OFDM systems
    1.
    发明授权
    Residual frequency, phase, timing offset and signal amplitude variation tracking apparatus and methods for OFDM systems 有权
    用于OFDM系统的残余频率，相位，定时偏移和信号幅度变化跟踪装置和方法

    公开(公告)号：US07916797B2

    公开(公告)日：2011-03-29

    申请号：US11286996

    申请日：2005-11-22

    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： H04K1/10 ,  H04L27/00 ,  H04J11/00

    CPC分类号： H04L27/266 ,  H04L27/2659 ,  H04L27/2662 ,  H04L27/2675 ,  H04L27/2682 ,  H04L27/2685 ,  H04L27/2695

    摘要： An error tracking apparatus and method for tracking a residual frequency error, a phase error, a timing error, and a signal amplitude variation to enhance a phase error tracking performance and a tracking speed in an orthogonal frequency division multiplexing (OFDM) system is provided. The error tracking apparatus and method include: a frequency error corrector for correcting a frequency at a time domain by adding a tracking carrier error estimating value to an initial carrier frequency error estimating value; a signal amplitude tracking corrector for controlling a signal amplitude by multiplying an input signal converted by a fast Fourier transform (FFT) by an output value corresponding to a calculated power of a receive pilot signal; a channel corrector for outputting a channel correcting signal by multiplying the receive pilot signal by a complex conjugate of a frequency channel response of the receive pilot signal; a carrier frequency error estimator for estimating a carrier frequency error parameter using the channel-corrected pilot and providing the tracking carrier frequency error estimating value; a time offset estimator for estimating a time offset parameter using the channel-corrected pilot; and a carrier phase error estimator for estimating a carrier phase error parameter using the channel-corrected pilot.

    摘要翻译： 提供了一种用于跟踪残余频率误差，相位误差，定时误差和信号幅度变化的误差跟踪装置和方法，以增强正交频分复用（OFDM）系统中的相位误差跟踪性能和跟踪速度。 误差跟踪装置和方法包括：频率误差校正器，用于通过将初始载波频率误差估计值加上跟踪载波误差估计值来校正时域的频率; 信号幅度跟踪校正器，用于通过将通过快速傅里叶变换（FFT）转换的输入信号乘以与所计算的接收导频信号的功率相对应的输出值来控制信号幅度; 信道校正器，用于通过将接收导频信号乘以接收导频信号的频率信道响应的复共轭来输出信道校正信号; 载波频率误差估计器，用于使用所述信道校正的导频来估计载波频率误差参数，并提供所述跟踪载波频率误差估计值; 时间偏移估计器，用于使用所述通道校正的导频来估计时间偏移参数; 以及载波相位误差估计器，用于使用信道校正的导频来估计载波相位误差参数。

    Method for detecting symbol synchronization and apparatus thereof
    2.
    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。

    Method for detecting signal in multiple input multiple output system and receiving device of multiple input multiple output system
    3.
    发明授权
    Method for detecting signal in multiple input multiple output system and receiving device of multiple input multiple output system 有权
    多输入多输出系统和多输入多输出系统接收装置的信号检测方法

    公开(公告)号：US07590201B2

    公开(公告)日：2009-09-15

    申请号：US11198595

    申请日：2005-08-04

    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： H04L1/02

    CPC分类号： H04B7/0851

    摘要： The present invention relates to a method for detecting a signal in an MIMO system. In the method, a received signal is detected in a zero forcing (ZF) method, and a first detection interval is established from the signal detected in the ZF method. The received signal is detected within the first detection interval in a maximum likelihood (ML) method, a second detection interval is established from the signals respectively detected in the ZF method and the ML method. A final solution is determined by detecting the received signal within the second detection interval in the ML method.

    摘要翻译： 本发明涉及MIMO系统中的信号检测方法。 在该方法中，以迫零（ZF）方法检测接收信号，并且根据在ZF方法中检测到的信号建立第一检测间隔。 在最大似然（ML）方法的第一检测间隔内检测接收信号，从ZF方法和ML方法分别检测的信号建立第二检测间隔。 通过在ML方法中检测第二检测间隔内的接收信号来确定最终解决方案。

    Automatic gain control method in wireless packet communication system
    4.
    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。

    Residual frequency, phase, timing offset and signal amplitude variation tracking apparatus and methods for OFDM systems
    5.
    发明申请
    Residual frequency, phase, timing offset and signal amplitude variation tracking apparatus and methods for OFDM systems 有权
    用于OFDM系统的残余频率，相位，定时偏移和信号幅度变化跟踪装置和方法

    公开(公告)号：US20060133527A1

    公开(公告)日：2006-06-22

    申请号：US11286996

    申请日：2005-11-22

    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： H04K1/10 ,  H03D1/04

    CPC分类号： H04L27/266 ,  H04L27/2659 ,  H04L27/2662 ,  H04L27/2675 ,  H04L27/2682 ,  H04L27/2685 ,  H04L27/2695

    摘要： An error tracking apparatus and method for tracking a residual frequency error, a phase error, a timing error, and a signal amplitude variation to enhance a phase error tracking performance and a tracking speed in an orthogonal frequency division multiplexing (OFDM) system is provided. The error tracking apparatus and method include: a frequency error corrector for correcting a frequency at a time domain by adding a tracking carrier error estimating value to an initial carrier frequency error estimating value; a signal amplitude tracking corrector for controlling a signal amplitude by multiplying an input signal converted by a fast Fourier transform (FFT) by an output value corresponding to a calculated power of a receive pilot signal; a channel corrector for outputting a channel correcting signal by multiplying the receive pilot signal by a complex conjugate of a frequency channel response of the receive pilot signal; a carrier frequency error estimator for estimating a carrier frequency error parameter using the channel-corrected pilot and providing the tracking carrier frequency error estimating value; a time offset estimator for estimating a time offset parameter using the channel-corrected pilot; and a carrier phase error estimator for estimating a carrier phase error parameter using the channel-corrected pilot.

    摘要翻译： 提供了一种用于跟踪残余频率误差，相位误差，定时误差和信号幅度变化的误差跟踪装置和方法，以增强正交频分复用（OFDM）系统中的相位误差跟踪性能和跟踪速度。 误差跟踪装置和方法包括：频率误差校正器，用于通过将初始载波频率误差估计值加上跟踪载波误差估计值来校正时域的频率; 信号幅度跟踪校正器，用于通过将通过快速傅里叶变换（FFT）转换的输入信号乘以与所计算的接收导频信号的功率相对应的输出值来控制信号幅度; 信道校正器，用于通过将接收导频信号乘以接收导频信号的频率信道响应的复共轭来输出信道校正信号; 载波频率误差估计器，用于使用所述信道校正的导频来估计载波频率误差参数，并提供所述跟踪载波频率误差估计值; 时间偏移估计器，用于使用所述通道校正的导频来估计时间偏移参数; 以及载波相位误差估计器，用于使用信道校正的导频来估计载波相位误差参数。

    Automatic gain control method in wireless packet communication system
    7.
    发明申请
    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：US20060121867A1

    公开(公告)日：2006-06-08

    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。

    Method for detecting signal in multiple input multiple output system and receiving device of multiple input multiple output system
    8.
    发明申请
    Method for detecting signal in multiple input multiple output system and receiving device of multiple input multiple output system 有权
    多输入多输出系统和多输入多输出系统接收装置的信号检测方法

    公开(公告)号：US20050276362A1

    公开(公告)日：2005-12-15

    申请号：US11198595

    申请日：2005-08-04

    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： H04B7/08 ,  H04B7/10

    CPC分类号： H04B7/0851

    摘要： The present invention relates to a method for detecting a signal in an MIMO system. In the method, a received signal is detected in a zero forcing (ZF) method, and a first detection interval is established from the signal detected in the ZF method. The received signal is detected within the first detection interval in a maximum likelihood (ML) method, a second detection interval is established from the signals respectively detected in the ZF method and the ML method. A final solution is determined by detecting the received signal within the second detection interval in the ML method.

    摘要翻译： 本发明涉及MIMO系统中的信号检测方法。 在该方法中，以迫零（ZF）方法检测接收信号，并且根据在ZF方法中检测到的信号建立第一检测间隔。 在最大似然（ML）方法的第一检测间隔内检测接收信号，从ZF方法和ML方法分别检测的信号建立第二检测间隔。 通过在ML方法中检测第二检测间隔内的接收信号来确定最终解决方案。