公开(公告)号：KR1020040032021A

公开(公告)日：2004-04-14

申请号：KR1020020061332

申请日：2002-10-08

Applicant: 삼성전자주식회사

Inventor： 리아오진지 ,  노정민 ,  왕하이 ,  첸용천 ,  카오펭밍 ,  주판유 ,  박동식

IPC: H04J11/00

CPC classification number: H04L27/2607

Abstract: PURPOSE: An apparatus and a method for inserting/removing a protection block of an OFDM communication system are provided to enhance the performance of time synchronization by inserting pilot data streams. CONSTITUTION: An apparatus for inserting/removing a protection block of an OFDM communication system includes a protection block insertion unit(530) and a selection unit(590). The protection block insertion unit(530) copies block data of predetermined positions from received data streams and inserts the copied block data into a predetermined protection block of the received data streams. The selection unit(590) inputs selectively output data streams of the protection block insertion unit and particular words having a non-periodical autocorrelation characteristic and outputs OFDM symbols. The OFDM symbols are formed by inserting the particular words into the output data streams. The apparatus for inserting/removing the protection block of the OFDM communication system further includes a buffer(570) for storing the particular words and a control unit(580) for controlling a selective input operation of the selection unit(590).

Abstract translation: 目的：提供一种用于插入/去除OFDM通信系统的保护块的装置和方法，以通过插入导频数据流来增强时间同步的性能。 构成：用于插入/去除OFDM通信系统的保护块的装置包括保护块插入单元（530）和选择单元（590）。 保护块插入单元（530）从接收到的数据流中复制预定位置的块数据，并将复制的块数据插入到接收的数据流的预定保护块中。 选择单元（590）选择性地输入保护块插入单元的输出数据流和具有非周期自相关特性的特定字，并输出OFDM符号。 通过将特定单词插入到输出数据流中来形成OFDM符号。 用于插入/去除OFDM通信系统的保护块的装置还包括用于存储特定字的缓冲器（570）和用于控制选择单元（590）的选择性输入操作的控制单元（580）。

公开(公告)号：KR1020030075117A

公开(公告)日：2003-09-22

申请号：KR1020020014334

申请日：2002-03-16

Applicant: 삼성전자주식회사

Inventor： 주판유 ,  노정민

IPC: H04J11/00

CPC classification number: H04L5/0007 ,  H04L5/0037 ,  H04L5/0051 ,  H04L5/006 ,  H04L5/0085 ,  H04L25/0226

Abstract: PURPOSE: A method and an apparatus for allocating an adaptive pilot carrier in an OFDMA(Orthogonal Frequency Division Multiplexing Access) system are provided to reduce a phase error by changing adaptively pilot carriers allocated to a sub channel. CONSTITUTION: A method for allocating an adaptive pilot carrier in an OFDMA system includes a decision process, the first allocation process, and the second allocation process. The decision process is to decide a state a sub channel by measuring a bit error rate of the received pilot carriers through the sub channel(401). The first allocation process is to increase the number of predetermined pilot carriers and allocate the increased pilot carriers to the sub channel when the sub channel is in the good state(403,404,408). The second allocation process is to reduce the number of predetermined pilot carriers and allocate the reduced pilot carriers to the sub channel when the sub channel is in the bad state(405,406,408).

Abstract translation: 目的：提供一种用于在OFDMA（正交频分复用接入）系统中分配自适应导频载波的方法和装置，以通过改变分配给子信道的自适应导频载波来减少相位误差。 构成：在OFDMA系统中分配自适应导频载波的方法包括决策处理，第一分配处理和第二分配处理。 决定处理是通过测量通过子信道的接收到的导频载波的比特误码率来确定子信道的状态（401）。 第一分配处理是当子信道处于良好状态时，增加预定导频载波的数量并将增加的导频载波分配给子信道（403,404,408）。 第二分配处理是当子信道处于坏状态时，减少预定导频载波的数量并将减小的导频载波分配给子信道（405,406,408）。

公开(公告)号：KR1020030064219A

公开(公告)日：2003-07-31

申请号：KR1020020009672

申请日：2002-02-22

Applicant: 삼성전자주식회사

Inventor： 김도영 ,  노정민 ,  정기호 ,  강대업 ,  주판유

IPC: H04B7/26

CPC classification number: H04W88/02 ,  H04W36/0061 ,  H04W88/08

Abstract: PURPOSE: A method for assigning different ranging code sets between a cell and a neighboring cell in an OFDMA(Orthogonal Frequency Division Multiple Access) wireless communication system is provided to differentiate ranging codes used every neighboring cell, in order to easily know whether ranging signals belong to terminals included in a self cell, thereby preventing deterioration of a ranging success probability. CONSTITUTION: A base station transmits ranging information to all mobile terminals of a cell(310). The base station receives ranging signals from the mobile terminals corresponding to the ranging information through assigned sub channels(312). The base station decides whether ranging processes in accordance with the ranging signals are proper to ranging standards(314). If so, the base station decides whether ranging codes proper to the ranging standards exist within a self ranging code set(316). If so, the base station transmits ranging response signals to the mobile terminals(318). The base station decides whether time for transmitting system information comes(320). If not, the base station completes the process.

Abstract translation: 目的：提供一种用于在OFDMA（正交频分多址）无线通信系统中的小区和相邻小区之间分配不同测距码集的方法，以区分每个相邻小区使用的测距码，以便容易地知道测距信号是否属于 包括在自身单元中的终端，从而防止测距成功概率的劣化。 构成：基站向小区（310）的所有移动终端发送测距信息。 基站通过分配的子信道（312）从对应于测距信息的移动终端接收测距信号。 基站根据测距信号判定测距处理是否适合测距标准（314）。 如果是，则基站决定是否存在适合测距标准的测距码在自测距码集内（316）。 如果是，则基站向移动终端发送测距响应信号（318）。 基站决定是否发送系统信息的时间（320）。 如果没有，基站完成该过程。

公开(公告)号：KR1020030058589A

公开(公告)日：2003-07-07

申请号：KR1020010089103

申请日：2001-12-31

Applicant: 삼성전자주식회사

Inventor： 정기호 ,  강대업 ,  유한일 ,  노정민 ,  이소강 ,  왕지아청 ,  챠오펑밍

IPC: H04J11/00

CPC classification number: H04L5/0082 ,  H04J13/16 ,  H04L5/0007 ,  H04L5/0016 ,  H04L5/0073

Abstract: PURPOSE: A ranging interval and ranging sub channel allocation method for initial ranging of an orthogonal frequency division multiple access(OFDMA) system is provided, which reduces ICI(Inter-Channel Interference) between ranging signals in a TDD mode OFDMA wireless communication system. CONSTITUTION: According to the method for allocating ranging interval for initial ranging with a subscriber station in a base station of a multi user orthogonal frequency division multiple access(OFDMA) wireless communication system, a receiving interval of an initial ranging signal is determined by reflecting maximum delay predicted while transmitting and receiving data with the subscriber station. System information required in the initial ranging including the determined receiving interval are broadcasted to all subscriber stations in a cell through a broadcasting channel. And the initial ranging signal from the subscriber stations is received in correspondence to the system information as to all symbols received from the subscriber stations in the determined receiving interval.

Abstract translation: 目的：提供一种用于正交频分多址（OFDMA）系统的初始测距的测距间隔和测距子信道分配方法，从而降低TDD模式OFDMA无线通信系统中的测距信号之间的ICI（信道间干扰）。 构成：根据用于在多用户正交频分多址（OFDMA）无线通信系统的基站中的用户站进行初始测距的分配距离的方法，初始测距信号的接收间隔通过反映最大值 在用户站发送和接收数据时预测的延迟。 包括确定的接收间隔的初始测距中所需的系统信息通过广播信道广播到小区中的所有用户台。 并且来自订户站的初始测距信号是对应于在确定的接收间隔中从用户站接收的所有符号的系统信息而被接收的。