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    TDM BASED CELL SEARCH METHOD IN OFDM CELLULAR SYSTEM, FRAME TRANSMISSION METHOD THEREOF AND SYSTEM THEREOF
    42.
    发明公开
    TDM BASED CELL SEARCH METHOD IN OFDM CELLULAR SYSTEM, FRAME TRANSMISSION METHOD THEREOF AND SYSTEM THEREOF 审中-公开
    OFDM蜂窝系统中的基于TDM的小区搜索方法，其帧传输方法及其系统

    公开(公告)号：KR20070099483A

    公开(公告)日：2007-10-09

    申请号：KR20070032903

    申请日：2007-04-03

    Applicant: KOREA ELECTRONICS TELECOMM

    Inventor： KIM IL GYU ,  PARK HYEONG GEUN ,  CHANG KAP SEOK ,  KO YOUNG JO ,  YI HYO SEOK ,  KIM YOUNG HOON ,  BANG SEUNG CHAN ,  HWANG SEUNG KU

    IPC: H04L27/26 ,  H04B7/26 ,  H04J11/00 ,  H04L7/10

    CPC classification number: H04J11/0073 ,  H04J11/0076 ,  H04L5/0016 ,  H04L5/0078 ,  H04L27/2657 ,  H04W48/16

    Abstract: A cell searching method in an OFDM(Orthogonal Frequency Division Multiplexing) cellular system, a frame transmitting method, and a frame transmitter are provided to reduce a cell searching time in a mobile terminal by simplifying a cell searching device. A forward link frame has duration of 10ms and includes 20 sub-frames(110). Each of the sub-frames has a duration of 0.5ms and includes 7 OFDM symbols(120). A primary synchronous channel OFDM symbol(100-A) and a secondary synchronous channel OFDM symbol(101-A) are included in every ten sub-frames. Two first and second synchronous channel OFDM symbols are included in one frame. A repetition period(130) of the synchronous channel symbols is equal to a sum of lengths of ten sub-frames. When first and second synchronous channels are coupled with each other according to a TDM(Time Division Multiplexing) scheme, the first and second synchronous channels are arranged to be adjacent to each other, such that a channel estimation value of the first synchronous channel is used, while the second synchronous channel is coherently demodulated.

    Abstract translation: 提供OFDM（正交频分复用）蜂窝系统，帧发送方法和帧发送机中的小区搜索方法，通过简化小区搜索装置来减少移动终端中的小区搜索时间。 前向链路帧具有10ms的持续时间并且包括20个子帧（110）。 每个子帧具有0.5ms的持续时间并且包括7个OFDM符号（120）。 在每十个子帧中包括主同步信道OFDM符号（100-A）和辅同步信道OFDM符号（101-A）。 一个帧中包括两个第一和第二同步信道OFDM符号。 同步信道符号的重复周期（130）等于十个子帧的长度之和。 当根据TDM（时分复用）方案将第一和第二同步信道彼此耦合时，第一和第二同步信道被布置为彼此相邻，使得使用第一同步信道的信道估计值 而第二同步信道被相干解调。

    FDM BASED CELL SEARCH METHOD IN OFDM CELLULAR SYSTEM, FRAME TRANSMISSION METHOD THEREOF AND SYSTEM THEREOF
    43.
    发明公开
    FDM BASED CELL SEARCH METHOD IN OFDM CELLULAR SYSTEM, FRAME TRANSMISSION METHOD THEREOF AND SYSTEM THEREOF 审中-公开
    OFDM系统中的基于FDM的小区搜索方法，其帧传输方法及其系统

    公开(公告)号：KR20070099477A

    公开(公告)日：2007-10-09

    申请号：KR20070032811

    申请日：2007-04-03

    Applicant: KOREA ELECTRONICS TELECOMM

    Inventor： KIM IL GYU ,  PARK HYEONG GEUN ,  CHANG KAP SEOK ,  KO YOUNG JO ,  YI HYO SEOK ,  KIM YOUNG HOON ,  BANG SEUNG CHAN ,  KIM NAM IL

    IPC: H04L27/26 ,  H04B7/26 ,  H04J11/00

    CPC classification number: H04J11/0069 ,  H04B7/2621

    Abstract: A cell searching method in an OFDM(Orthogonal Frequency Division Multiplexing) cellular system, a frame transmitting method, and a frame transmitter are provided to reduce a cell searching time in the OFDM cellular system by reducing a configuration complexity of a cell searching unit. A synchronization detector(622) includes correlation calculators(701-A,701-B), a signal coupler(702), an accumulation unit(703), and a timing detector(710). Outputs from the correlation calculators are accumulated in the accumulation unit through the signal coupler. The correlation calculator generates 4800 units in respective synchronization blocks. The timing detector detects a position of a sample having a peak value from correlation values, and determines the detector sample position as synchronous channel symbol timing. The accumulation unit adds the respective correlation values for the sample positions to the correlation value corresponding to a position, which is spaced from the respective sample positions by a length of the synchronization block.

    Abstract translation: 提供OFDM（正交频分复用）蜂窝系统，帧发送方法和帧发送机中的小区搜索方法，通过减小小区搜索单元的配置复杂度来减少OFDM蜂窝系统中的小区搜索时间。 同步检测器（622）包括相关计算器（701-A，701-B），信号耦合器（702），累积单元（703）和定时检测器（710）。 来自相关计算器的输出通过信号耦合器累积在累积单元中。 相关计算器在相应的同步块中产生4800个单元。 定时检测器从相关值检测具有峰值的样本的位置，并将检测器采样位置确定为同步信道符号定时。 累积单元将样本位置的各个相关值相加于与各个采样位置间隔一个同步块的长度的位置相对应的相关值。

    METHOD FOR RATE ADJUSTMENT PER SUBCARRIER IN MIMO SYSTEM
    50.
    发明公开
    METHOD FOR RATE ADJUSTMENT PER SUBCARRIER IN MIMO SYSTEM 无效
    MIMO系统中每个SUBCARRIER的速率调整方法

    公开(公告)号：KR20090063755A

    公开(公告)日：2009-06-18

    申请号：KR20070131237

    申请日：2007-12-14

    Applicant: KOREA ELECTRONICS TELECOMM

    Inventor： YOON CHAN HO ,  LEE IL GU ,  KANG HUN SIK ,  OH JONG EE ,  SONG YOO SEUNG ,  LEE SOK KYU ,  BANG SEUNG CHAN

    IPC: H04L27/26 ,  H04B7/02 ,  H04B7/04

    CPC classification number: H04B7/0626 ,  H04B7/0417 ,  H04L1/0003 ,  H04L27/2646

    Abstract: A variable transmission method according to a subcarrier in a multiple input multiple output is provided to determine a subcarrier modulation method flexibly in a wireless channel environment by applying a modulation method to each subcarrier by using a CN(Condition number) that is channel information. The CN that is the channel information is calculated(401). A subcarrier modulation method is determined according to the CN value(402). The CN is obtained by changing the roles of a transmitting terminal and a receiving terminal. The CN is a value obtained by dividing the maximum value of a singular value of a diagonal matrix by the minimum value.

    Abstract translation: 提供了一种根据多输入多输出中的副载波的可变传输方法，通过使用作为信道信息的CN（条件号）对每个子载波应用调制方法，在无线信道环境中灵活地确定副载波调制方法。 计算作为频道信息的CN（401）。 根据CN值（402）确定副载波调制方式。 通过改变发送终端和接收终端的角色来获得CN。 CN是通过将对角矩阵的奇异值的最大值除以最小值而获得的值。

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