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    Apparatus and method for providing a broadcasting service in a mobile communication system
    2.
    发明申请
    Apparatus and method for providing a broadcasting service in a mobile communication system 审中-公开
    一种用于在移动通信系统中提供广播服务的装置和方法

    公开(公告)号：US20050270969A1

    公开(公告)日：2005-12-08

    申请号：US11113326

    申请日：2005-04-25

    申请人： Jin-Kyu Han ,  Dae-Gyun Kim ,  Jin-Weon Chang ,  Beom-Sik Bae ,  Hwan-Joon Kwon ,  Dong-Hee Kim ,  Youn-Sun Kim

    发明人： Jin-Kyu Han ,  Dae-Gyun Kim ,  Jin-Weon Chang ,  Beom-Sik Bae ,  Hwan-Joon Kwon ,  Dong-Hee Kim ,  Youn-Sun Kim

    IPC分类号： H04L27/26 ,  H04B7/26 ,  H04J11/00 ,  H04L5/02

    CPC分类号： H04B7/2621 ,  H04L5/023 ,  H04L27/2607 ,  H04L27/261

    摘要： An apparatus and method for providing a broadcasting service in a mobile communication system. The apparatus and method can transmit broadcasting service data using orthogonal frequency division multiplexing (OFDM) symbols in the mobile communication system. Broadcasting service data is encoded and modulated. The modulated data is demultiplexed into data streams corresponding to a number of orthogonal frequency subcarriers. The data streams are transformed using Fast Fourier Transform (FFT). The transformed data streams are multiplexed using OFDM. Information with a predetermined length placed in a last part of OFDM data is copied. The copied information is added as a cyclic prefix (CP) to a head part of the OFDM data, and OFDM symbols to be transmitted are generated. The generated OFDM symbols are multiplexed into a forward channel of the mobile communication system, and the multiplexed OFDM symbols are transmitted.

    摘要翻译： 一种在移动通信系统中提供广播服务的装置和方法。 该装置和方法可以在移动通信系统中使用正交频分复用（OFDM）符号发送广播业务数据。 广播服务数据被编码和调制。 调制数据被解复用为与多个正交频率子载波相对应的数据流。 数据流使用快速傅里叶变换（FFT）进行变换。 经变换的数据流使用OFDM复用。 放置在OFDM数据的最后部分中的预定长度的信息被复制。 复制的信息作为循环前缀（CP）添加到OFDM数据的头部，并且生成要发送的OFDM符号。 所生成的OFDM符号被复用到移动通信系统的前向信道中，并且发送多路复用的OFDM符号。

    Apparatus and method for frequency synchronization in OFDM system
    7.
    发明授权
    Apparatus and method for frequency synchronization in OFDM system 有权
    OFDM系统中频率同步的装置和方法

    公开(公告)号：US07596181B2

    公开(公告)日：2009-09-29

    申请号：US11227325

    申请日：2005-09-16

    申请人： Jin-Weon Chang ,  Hwan-Joon Kwon ,  Dong-Hee Kim ,  Youn-Sun Kim ,  Jin-Kyu Han

    发明人： Jin-Weon Chang ,  Hwan-Joon Kwon ,  Dong-Hee Kim ,  Youn-Sun Kim ,  Jin-Kyu Han

    IPC分类号： H04K1/10

    CPC分类号： H04L27/2659 ,  H04L27/2607 ,  H04L27/2633 ,  H04L27/266 ,  H04L27/2678

    摘要： A method and apparatus are provided for frequency synchronization in an Orthogonal Frequency Division Multiplexing (OFDM) system, wherein the method includes the steps of transmitting OFDM symbols in such a manner that a data symbol size of a particular OFDM symbol in each frame is set to be smaller than a data symbol size of a typical OFDM symbol within the frame, receiving the OFDM symbols and calculating respectively, correlation coefficients of the particular OFDM symbol based on both a time interval of corresponding data symbols and a time interval of data symbols of the typical OFDM symbol, taking respectively phases of corresponding correlation coefficient calculated from the particular OFDM symbol and estimating a decimal part of a frequency offset, and determining an integer part of the frequency offset corresponding to the decimal part of the frequency offset, thereby estimating an entire frequency offset and acquiring the frequency synchronization.

    摘要翻译： 提供了一种在正交频分复用（OFDM）系统中进行频率同步的方法和装置，其中该方法包括以下步骤：以每个帧中的特定OFDM符号的数据符号大小被设置为 小于帧内的典型OFDM符号的数据符号大小，接收OFDM符号并分别基于相应数据符号的时间间隔和相应数据符号的数据符号的时间间隔分别计算特定OFDM符号的相关系数 分别采用从特定OFDM符号计算出的相应相关系数的相位，并估计频率偏移的小数部分，并且确定与频率偏移的小数部分相对应的频率偏移的整数部分，从而估计整个 频率偏移和获取频率同步。

    Apparatus and method for frequency synchronization in OFDM system
    8.
    发明申请
    Apparatus and method for frequency synchronization in OFDM system 有权

    公开(公告)号：US20060062317A1

    公开(公告)日：2006-03-23

    申请号：US11227325

    申请日：2005-09-16

    申请人： Jin-Weon Chang ,  Hwan-Joon Kwon ,  Dong-Hee Kim ,  Youn-Sun Kim ,  Jin-Kyu Han

    发明人： Jin-Weon Chang ,  Hwan-Joon Kwon ,  Dong-Hee Kim ,  Youn-Sun Kim ,  Jin-Kyu Han

    IPC分类号： H04K1/10

    CPC分类号： H04L27/2659 ,  H04L27/2607 ,  H04L27/2633 ,  H04L27/266 ,  H04L27/2678

    摘要： A method and apparatus are provided for frequency synchronization in an Orthogonal Frequency Division Multiplexing (OFDM) system, wherein the method includes the steps of transmitting OFDM symbols in such a manner that a data symbol size of a particular OFDM symbol in each frame is set to be smaller than a data symbol size of a typical OFDM symbol within the frame, receiving the OFDM symbols and calculating respectively, correlation coefficients of the particular OFDM symbol based on both a time interval of corresponding data symbols and a time interval of data symbols of the typical OFDM symbol, taking respectively phases of corresponding correlation coefficient calculated from the particular OFDM symbol and estimating a decimal part of a frequency offset, and determining an integer part of the frequency offset corresponding to the decimal part of the frequency offset, thereby estimating an entire frequency offset and acquiring the frequency synchronization.