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    Transmitting and receiving method for reducing distortion caused by a time-varying channel in an orthogonal frequency division multiplex system
    1.
    发明授权
    Transmitting and receiving method for reducing distortion caused by a time-varying channel in an orthogonal frequency division multiplex system 有权
    用于减少由正交频分复用系统中的时变信道引起的失真的发送和接收方法

    公开(公告)号：US07382718B2

    公开(公告)日：2008-06-03

    申请号：US10334354

    申请日：2002-12-31

    申请人： Kyung-Hi Chang ,  Yun-Hee Kim ,  Yong-Soo Cho ,  Kyung-Won Park

    发明人： Kyung-Hi Chang ,  Yun-Hee Kim ,  Yong-Soo Cho ,  Kyung-Won Park

    IPC分类号： H04L5/04 ,  H04L27/00 ,  H04J11/00 ,  G06F15/00

    CPC分类号： H04W52/16 ,  H04L1/0618 ,  H04L25/0204 ,  H04L27/2647 ,  H04W52/42

    摘要： Disclosed is a transmitting and receiving method for reducing a time-varying channel distortion in an orthogonal frequency division multiplex (OFDM) system. In the present invention, the transmitter defines M sub-channels in one data group, mathematically analyzes a change of channel for each path causing a time-varying channel distortion in a high-speed mobile environment by approximation, calculates a weight value based on the mathematical analysis and assigns the calculated weight value to transmit data of each sub-channel. Subsequently, the receiver combines the signals of these M sub-channels and demodulates the combined signals. Accordingly, the present invention greatly reduces a distortion caused by the time-varying channel to improve a bit error rate and a channel estimation performance.

    摘要翻译： 公开了一种用于减少正交频分复用（OFDM）系统中的时变信道失真的发送和接收方法。 在本发明中，发射机在一个数据组中定义M个子信道，通过近似来数学地分析导致高速移动环境中的时变信道失真的每个路径的信道变化，基于 数学分析，并分配计算的权重值以发送每个子频道的数据。 随后，接收机组合这些M个子信道的信号并解调组合的信号。 因此，本发明大大减少了由时变信道引起的失真，以提高误码率和信道估计性能。

    Method and apparatus for embodying and synchronizing downlink signal in mobile communication system and method for searching cell using the same
    5.
    发明授权
    Method and apparatus for embodying and synchronizing downlink signal in mobile communication system and method for searching cell using the same 有权
    用于在移动通信系统中实现和同步下行链路信号的方法和装置及使用其的小区搜索方法

    公开(公告)号：US07430193B2

    公开(公告)日：2008-09-30

    申请号：US10536593

    申请日：2002-11-29

    申请人： Kwang-Soon Kim ,  Kyung-Hi Chang ,  Yong-Soo Cho ,  Tae-Gon Kim

    发明人： Kwang-Soon Kim ,  Kyung-Hi Chang ,  Yong-Soo Cho ,  Tae-Gon Kim

    IPC分类号： H04B7/00 ,  H04B7/216 ,  H04B7/212 ,  H04Q7/00 ,  H04Q7/24 ,  H04J3/00 ,  H04J1/00 ,  H04J3/06

    CPC分类号： H04L27/2656 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0053 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2662 ,  H04L27/2678

    摘要： In an OFDMA-based cellular system, a frame of a downlink signal includes a common slot and traffic slots. The common slot includes a synchronization preamble and a cell search preamble. The synchronization preamble has a structure for synchronizing time and frequency, and the cell search preamble has a cell search structure. The traffic slot includes pilot symbols provided on the time and frequency axes. A cyclic prefix is used to estimate initial symbol synchronization, and the initial symbol synchronization and the synchronization preamble are used to synchronize the frame. The synchronization frame and the cell search preamble are used to estimate time and frequency synchronization. The cell search preamble is used to search cells. When the initial synchronization is performed, the cyclic prefix is used to track the frequency, the synchronization preamble is used to track symbol synchronization, and the cell search preamble is used to track fine frequency synchronization.

    摘要翻译： 在基于OFDMA的蜂窝系统中，下行链路信号的帧包括公共时隙和业务时隙。 公共时隙包括同步前导码和小区搜索前同步码。 同步前导码具有用于同步时间和频率的结构，并且小区搜索前导码具有小区搜索结构。 业务插槽包括在时间轴和频率轴上提供的导频符号。 使用循环前缀来估计初始符号同步，并且使用初始符号同步和同步前导码来同步该帧。 同步帧和小区搜索前导码用于估计时间和频率同步。 小区搜索前导码用于搜索小区。 当执行初始同步时，使用循环前缀来跟踪频率，同步前同步码用于跟踪符号同步，并且使用小区搜索前导码来跟踪精细频率同步。

    Method and apparatus for embodying and synchronizing downlink signal in mobile communication system and method for searching cell using the same
    6.
    发明申请
    Method and apparatus for embodying and synchronizing downlink signal in mobile communication system and method for searching cell using the same 有权
    用于在移动通信系统中实现和同步下行链路信号的方法和装置及使用其的小区搜索方法

    公开(公告)号：US20060114812A1

    公开(公告)日：2006-06-01

    申请号：US10536593

    申请日：2002-11-29

    申请人： Kwang-Soon Kim ,  Kyung-Hi Chang ,  Yong-Soo Cho ,  Tae-Gon Kim

    发明人： Kwang-Soon Kim ,  Kyung-Hi Chang ,  Yong-Soo Cho ,  Tae-Gon Kim

    IPC分类号： H04J11/00

    CPC分类号： H04L27/2656 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0053 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2662 ,  H04L27/2678

    摘要： In an OFDMA-based cellular system, a frame of a downlink signal includes a common slot and traffic slots. The common slot includes a synchronization preamble and a cell search preamble. The synchronization preamble has a structure for synchronizing time and frequency, and the cell search preamble has a cell search structure. The traffic slot includes pilot symbols provided on the time and frequency axes. A cyclic prefix is used to estimate initial symbol synchronization, and the initial symbol synchronization and the synchronization preamble are used to synchronize the frame. The synchronization frame and the cell search preamble are used to estimate time and frequency synchronization. The cell search preamble is used to search cells. When the initial synchronization is performed, the cyclic prefix is used to track the frequency, the synchronization preamble is used to track symbol synchronization, and the cell search preamble is used to track fine frequency synchronization.

    摘要翻译： 在基于OFDMA的蜂窝系统中，下行链路信号的帧包括公共时隙和业务时隙。 公共时隙包括同步前导码和小区搜索前同步码。 同步前导码具有用于同步时间和频率的结构，并且小区搜索前导码具有小区搜索结构。 业务插槽包括在时间轴和频率轴上提供的导频符号。 使用循环前缀来估计初始符号同步，并且使用初始符号同步和同步前导码来同步该帧。 同步帧和小区搜索前导码用于估计时间和频率同步。 小区搜索前导码用于搜索小区。 当执行初始同步时，使用循环前缀来跟踪频率，同步前同步码用于跟踪符号同步，并且使用小区搜索前导码来跟踪精细频率同步。

    ADAPTIVE TRANSMISSION AND RECEIVING METHOD AND DEVICE IN WIRELESS COMMUNICATION SYSTEM WITH MULTIPLE ANTENNAS
    7.
    发明申请
    ADAPTIVE TRANSMISSION AND RECEIVING METHOD AND DEVICE IN WIRELESS COMMUNICATION SYSTEM WITH MULTIPLE ANTENNAS 有权
    具有多个天线的无线通信系统中的自适应传输和接收方法及装置

    公开(公告)号：US20110059700A1

    公开(公告)日：2011-03-10

    申请号：US12874629

    申请日：2010-09-02

    申请人： Yun-Hee Kim ,  Kwang-Soon Kim ,  Sang-Hyun Lee ,  Kyu-Jong Hwang ,  Kyung-Hi Chang

    发明人： Yun-Hee Kim ,  Kwang-Soon Kim ,  Sang-Hyun Lee ,  Kyu-Jong Hwang ,  Kyung-Hi Chang

    IPC分类号： H04B7/00

    CPC分类号： H04L1/0003 ,  H04B7/0417 ,  H04B7/0669 ,  H04B7/0689 ,  H04B7/0697 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/0026 ,  H04L1/0618 ,  Y02D70/1244 ,  Y02D70/142 ,  Y02D70/444

    摘要： Disclosed is an adaptive transmit and receive method and device in a multiple-antenna wireless communication system. A transmit mode comprises different main transmit modes each of which includes one or both of a sub-transmit mode based on STBC and a sub-transmit mode based on SM. A receiver calculates an STBC performance parameter and a SM performance parameter, and a transmitter uses the parameters to determine a main transmit mode with maximum data rates and select a sub-transmit mode for minimizing power consumption. The transmitter channel-encodes, modulates and antenna-maps input data according to the selected transmit mode, and outputs results to the receiver. The receiver antenna/symbol-demodulates and channel-decodes the received data.

    摘要翻译： 公开了一种在多天线无线通信系统中的自适应发射和接收方法和装置。 发送模式包括不同的主发送模式，每个发送模式包括基于STBC的子发送模式和基于SM的子发送模式中的一个或两个。 接收机计算STBC性能参数和SM性能参数，发射机使用参数来确定具有最大数据速率的主发射模式，并选择用于最小化功耗的子发射模式。 发射机根据选择的发射模式对输入数据进行信道编码，调制和天线映射，并将结果输出到接收机。 接收机天线/符号解调并对接收的数据进行通道解码。

    ADAPTIVE TRANSMISSION AND RECEIVING METHOD AND DEVICE IN WIRELESS COMMUNICATION SYSTEM WITH MULTIPLE ANTENNAS
    9.
    发明申请
    ADAPTIVE TRANSMISSION AND RECEIVING METHOD AND DEVICE IN WIRELESS COMMUNICATION SYSTEM WITH MULTIPLE ANTENNAS 有权
    具有多个天线的无线通信系统中的自适应传输和接收方法及装置

    公开(公告)号：US20120127886A1

    公开(公告)日：2012-05-24

    申请号：US13364991

    申请日：2012-02-02

    申请人： Yun-Hee Kim ,  Kwang-Soon Kim ,  Sang-Hyun Lee ,  Kyu-Jong Hwang ,  Kyung-Hi Chang

    发明人： Yun-Hee Kim ,  Kwang-Soon Kim ,  Sang-Hyun Lee ,  Kyu-Jong Hwang ,  Kyung-Hi Chang

    IPC分类号： H04W24/00 ,  H04W72/04

    CPC分类号： H04L1/0003 ,  H04B7/0417 ,  H04B7/0669 ,  H04B7/0689 ,  H04B7/0697 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/0026 ,  H04L1/0618 ,  Y02D70/1244 ,  Y02D70/142 ,  Y02D70/444

    摘要： Disclosed is an adaptive transmit and receive method and device in a multiple-antenna wireless communication system. A transmit mode comprises different main transmit modes each of which includes one or both of a sub-transmit mode based on STBC and a sub-transmit mode based on SM. A receiver calculates an STBC performance parameter and a SM performance parameter, and a transmitter uses the parameters to determine a main transmit mode with maximum data rates and select a sub-transmit mode for minimizing power consumption. The transmitter channel-encodes, modulates and antenna-maps input data according to the selected transmit mode, and outputs results to the receiver. The receiver antenna/symbol-demodulates and channel-decodes the received data.

    摘要翻译： 公开了一种在多天线无线通信系统中的自适应发射和接收方法和装置。 发送模式包括不同的主发送模式，每个发送模式包括基于STBC的子发送模式和基于SM的子发送模式中的一个或两个。 接收机计算STBC性能参数和SM性能参数，发射机使用参数来确定具有最大数据速率的主发射模式，并选择用于最小化功耗的子发射模式。 发射机根据选择的发射模式对输入数据进行信道编码，调制和天线映射，并将结果输出到接收机。 接收机天线/符号解调并对接收的数据进行通道解码。