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公开(公告)号：KR101054556B1
公开(公告)日：2011-08-04
申请号：KR1020090039231
申请日：2009-05-06
Applicant: 한국전자통신연구원 , 영남대학교 산학협력단
Abstract: 위성 OFDMA 하향링크에서 PAR를 최소화하기 위한 제어 방법을 제안한다. 본 발명의 실시예에 따른 OFDMA기반 위성 무선 시스템의 하향링크에서 제어 방법은, 모든 사용자의 대규모 페이딩값들을 추정하는 단계; 대규모 페이딩값이 기준 페이딩값보다 큰 사용자들의 수를 카운트하는 단계; 상기 카운트한 사용자들의 수가 기준 사용자 수보다 작으면, 상기 카운트한 사용자들이 사용하는 부반송파의 수를 카운트하는 단계; 및 상기 카운트한 부반송파의 수가 기준 부반송파 수 보다 작으면, 전력제어 모드로 제어하는 단계를 포함한다.
PAR, 위성 OFDMA, 전력제어, AMC, 적응적 변조 및 부호화Abstract translation: 目的：通过假设用户的大规模衰落值并控制功率控制模式，使PAR最小化的控制方法可以最小化PAR。 构成：推测所有用户的大规模衰落值。 大规模衰落值大于标准衰落值的用户数被计数。 对用户计数使用的子载波数进行计数。 它被控制到电源控制模式。 推测用户的大幅度振幅值。 如果大幅度振幅值与参考振幅值（320）不相似，则TX功率被调整。 发送信号变为TX功率调整（330）。
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公开(公告)号：KR100515496B1
公开(公告)日：2005-09-20
申请号：KR1020020082858
申请日：2002-12-23
IPC: H04J13/10
CPC classification number: H04L27/2621 , H04B1/707 , H04B2201/70706 , H04L5/0021 , H04L25/03866 , H04L27/2602
Abstract: 본 발명은 다중반송파 코드분할 다중접속에서의 스크램블링 시스템 및 방법, 그 프로그램이 저장된 기록매체에 관한 것으로서, 이를 위하여 본 발명은 송신기에서는 사용자의 비트열이 입력되면 사용자의 직교부호 조합이나 사용자 수에 따라 결정된, 부반송파 수와 동일한 길이의 고정 스크램블링 부호를 사용하여 다중반송파 신호를 생성 출력하고, 수신기에서는 상기 송신기에서 사용한 스크램블링 부호와 동일한 스크램블링 부호를 사용하여 상기 송신기의 다중반송파 신호를 수신함으로써, 사용자 데이터와 무관하게 오직 사용자들의 직교 부호 조합에 따라 스크램블링 부호를 전환함으로써 간단하게 첨두대전력비를 감소시킬 수 있다.
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公开(公告)号：KR100461545B1
公开(公告)日：2004-12-16
申请号：KR1020020063942
申请日：2002-10-18
Applicant: 한국전자통신연구원
IPC: H04J13/10
Abstract: PURPOSE: A method for generating and detecting a synchronization code of a synchronous channel is provided to facilitate synchronization of a channel broadcast from a system by allowing a mobile station to receive a synchronization code before the system receives the broadcast channel. CONSTITUTION: A basic Golay code is generated. A configuration Golay code is generated. A first hierarchical Golay code is generated on the basis of the basic Golay code and the configuration Golay code.
Abstract translation: 目的：提供一种用于产生和检测同步信道的同步码的方法，以通过允许移动台在系统接收广播信道之前接收同步码来促进从系统广播的信道的同步。 组成：生成一个基本的Golay代码。 配置Golay代码被生成。 根据基本的Golay代码和配置Golay代码生成第一个分层Golay代码。
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公开(公告)号：KR100456455B1
公开(公告)日：2004-11-09
申请号：KR1020020060989
申请日：2002-10-07
Applicant: 한국전자통신연구원
IPC: H04B1/7103
CPC classification number: H04L5/026
Abstract: Disclosed is a method for using a different symbol timing for users so as to reduce a multiple access interference component in a multi-carrier code division multiple access (MC-CDMA) system. For this purpose, the presented invention involves dividing the users of the MC-CDMA system into two groups and applying an offset to the symbol timing between the user groups to cause a symbol transition of the opposite user group in the middle of the symbol interval, thereby reducing the multiple access interference component included in a symbol decision variable after a chip combination.
Abstract translation: 公开了一种为用户使用不同符号定时以便减少多载波码分多址（MC-CDMA）系统中的多址干扰分量的方法。 为此，本发明涉及将MC-CDMA系统的用户划分为两组，并将偏移应用于用户组之间的符号定时，以在符号间隔的中间引起相对用户组的符号转换， 由此减少码片组合之后包括在码元判决变量中的多址干扰分量。
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公开(公告)号：KR1020030095103A
公开(公告)日：2003-12-18
申请号：KR1020020032626
申请日：2002-06-11
Applicant: 한국전자통신연구원
IPC: H04B14/00
CPC classification number: H04B14/002 , H04B1/707 , H04J13/18
Abstract: PURPOSE: A code management method on multi carrier communication is provided to optimize codes for user codes and miniaturized symbol combinations only, thereby maintaining a minimal PAR(Peak-to-Average Ratio) and reducing complexity by calculating a PAR near to the minimal PAR. CONSTITUTION: A system initializes a user counter as 1(S1), initializes a reference PAR index value as a maximum value(S2), and initializes an orthogonal code counter(S3). The system checks whether an orthogonal code is pre-assigned(S4). If not, the system assigns the orthogonal code to a user, and calculates a temporary PAR index value(S5). The system compares the temporary PAR index value with the reference PAR index value(S6). If the reference PAR index value is bigger, the system resets the temporary PAR index value to the reference PAR index value(S7), and sets the orthogonal code to a temporary assignment code of the user(S8). The orthogonal code counter is increased by 1(S9). The system confirms whether all processes are completed(S10). If so, the system sets the temporary assignment code for the user counter, and increases the user counter by 1(S11,S12), then checks whether assignment codes for all users are set(S13). The orthogonal code assignment process is terminated(S14).
Abstract translation: 目的：提供多载波通信的代码管理方法，以优化用户代码和小型化符号组合的代码，从而通过计算靠近最小PAR的PAR来保持最小的PAR（峰值平均比）并降低复杂性。 构成：系统将用户计数器初始化为1（S1），将参考PAR索引值初始化为最大值（S2），并初始化正交码计数器（S3）。 系统检查是否预分配正交码（S4）。 如果不是，则系统将正交码分配给用户，并计算临时PAR索引值（S5）。 系统将临时PAR指数值与参考PAR指数值进行比较（S6）。 如果参考PAR索引值较大，则系统将临时PAR索引值重置为参考PAR索引值（S7），并将正交码设置为用户的临时分配代码（S8）。 正交码计数器增加1（S9）。 系统确认所有过程是否完成（S10）。 如果是，则系统设置用户计数器的临时分配码，并将用户计数器增加1（S11，S12），然后检查是否设置了所有用户的分配码（S13）。 正交码分配处理结束（S14）。
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Patent Agency Ranking
公开(公告)号：KR1020030039894A
公开(公告)日：2003-05-22
申请号：KR1020010071271
申请日：2001-11-16
Applicant: 한국전자통신연구원
IPC: H04L27/26
CPC classification number: H04L27/2621
Abstract: PURPOSE: A method for setting the phase coefficient of a sub-block signal in a partial transmission column orthogonal frequency division multiplexing system is provided to reduce the complexity of the process to set the phase coefficient to reduce the ratio between the peak power to the average power by the sequential process of the phase value as well as to reduce the ratio between the peak power to the average power, effectively. CONSTITUTION: A method for setting the phase coefficient of a sub-block signal in a partial transmission column orthogonal frequency division multiplexing system includes the steps of: initializing(201,202) by setting all phase coefficients of the sub-block signals as the first phase value for the sub-block signal, calculating the peak power obtained by adding the sub-block signal set by the phase coefficient at step(201,202) and for setting(203) the calculated value as a reference peak power, setting(206) the phase values to minimize the peak power of the output signal to the phase coefficients of the each sub-block signal with applying(205) the following phase value as the phase coefficient of each sub-block signal and repeating the above 3 steps for the remained usable phase values.
Abstract translation: 目的：提供一种在部分传输列正交频分复用系统中设置子块信号的相位系数的方法，以减少设置相位系数的过程的复杂性，以降低峰值功率与平均值之间的比值 功率通过相位值的顺序处理以及有效降低峰值功率与平均功率之间的比例。 构成：在部分传输列正交频分复用系统中设置子块信号的相位系数的方法包括以下步骤：通过将子块信号的所有相位系数设置为第一相位值来初始化（201,202） 对于子块信号，计算通过在步骤（201,202）添加由相位系数设置的子块信号而获得的峰值功率，并将计算出的值设置为（203）作为参考峰值功率，设置（206）相位 值，以通过施加（205）后续相位值作为每个子块信号的相位系数，将输出信号的峰值功率最小化为每个子块信号的相位系数，并重复上述3个步骤以保留可用 相位值。
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公开(公告)号：KR1020120072046A
公开(公告)日：2012-07-03
申请号：KR1020100133810
申请日：2010-12-23
Applicant: 한국전자통신연구원 , 영남대학교 산학협력단
CPC classification number: H04B7/0697 , H04B7/0669 , H04L27/2657 , H04L27/2675
Abstract: PURPOSE: An interference elimination encoding apparatus in a cooperative communication system is provided to correct the phase of data by using values induced from frequency offset information instead of a frequency transition process of a transmitter. CONSTITUTION: Two or more antennas executes frequency upward conversion through an independent carrier generator. A time space encoding unit(110) receives frequency offset information of a signal transmitted from a receiver(200) through two or more antennas through a feedback channel. The time space encoding apparatus creates an offset symbol by correcting two or more signals by using the frequency offset information received from a transmission apparatus(100).
Abstract translation: 目的：提供协作通信系统中的干扰消除编码装置，通过使用从频偏信息引起的值而不是发射机的频率转换处理来校正数据的相位。 构成：两个或多个天线通过独立载波发生器执行频率上转换。 时间空间编码单元（110）通过反馈信道从两个或多个天线接收从接收机（200）发送的信号的频率偏移信息。 时间空间编码装置通过使用从发送装置（100）接收到的频率偏移信息来校正两个以上的信号来生成偏移符号。
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公开(公告)号：KR1020100084955A
公开(公告)日：2010-07-28
申请号：KR1020090039231
申请日：2009-05-06
Applicant: 한국전자통신연구원 , 영남대학교 산학협력단
CPC classification number: H04L27/2614 , H04B7/18519
Abstract: PURPOSE: By presuming the large-scale fading value of user and controlling the power control mode the control method for minimizing the PAR can minimize PAR. CONSTITUTION: A large-scale fading values of all users are presumed. The number of users in which the large-scale fading value bigger than the standards fading value is counted. The number of subcarrier which users counted use is counted. It is controlled to the power control mode. The large-scale amplitude value of user is presumed. The TX power is adjusted if the large-scale amplitude value is not similar of the reference amplitude value(320). The transmission signal becomes to the TX power adjusted(330).
Abstract translation: 目的：通过假设用户的大规模衰落值并控制功率控制模式，使PAR最小化的控制方法可以最小化PAR。 构成：推测所有用户的大规模衰落值。 大规模衰落值大于标准衰落值的用户数被计数。 对用户计数使用的子载波数进行计数。 它被控制到电源控制模式。 推测用户的大幅度振幅值。 如果大幅度振幅值与参考振幅值（320）不相似，则TX功率被调整。 发送信号变为TX功率调整（330）。
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公开(公告)号：KR100441989B1
公开(公告)日：2004-07-30
申请号：KR1020010071271
申请日：2001-11-16
Applicant: 한국전자통신연구원
IPC: H04L27/26
CPC classification number: H04L27/2621
Abstract: A method for optimizing phase factors in partial transmit sequence orthogonal frequency division multiplexing system. The method includes initializing sub-block signals by applying an initial phase factor to the sub-block signals in all sub-blocks; setting a reference peak value with a peak value of a signal formed by combining the sub-block signals; selecting a phase value that minimizes the peak value of an output signal as the phase factor of each sub-block by applying a next phase value to each sub-block signal as the phase factor, and repeating this with respect to the remaining available phase values.
Abstract translation: 一种优化部分发射序列正交频分复用系统相位因子的方法。 该方法包括通过将初始相位因子应用于所有子块中的子块信号来初始化子块信号; 设置具有通过组合子块信号而形成的信号的峰值的参考峰值; 通过将下一个相位值作为相位因子应用于每个子块信号来选择使输出信号的峰值最小化的相位值作为每个子块的相位因子，并且针对剩余的可用相位值 。
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公开(公告)号：KR1020040056473A
公开(公告)日：2004-07-01
申请号：KR1020020082858
申请日：2002-12-23
IPC: H04J13/10
CPC classification number: H04L27/2621 , H04B1/707 , H04B2201/70706 , H04L5/0021 , H04L25/03866 , H04L27/2602
Abstract: PURPOSE: A scrambling system and method in a multi-carrier CDMA and a recording medium storing its program are provided to reduce a PARR(Peak-to-Average Power Ratio) by changing a scrambling code according to user's combination of orthogonal codes. CONSTITUTION: A symbol modulator modulates a bit sequence of the kth user into symbols(S1), and a multiplier multiplies each modulated symbols to an orthogonal code to spread it to a chip sequence(S2). An adder adds the spread chip sequences in synchronization with a symbol timing, and an interleaver performs interleaving on chip sequences of M number of symbols to be transmitted and aligns chips making the same symbols at M-chip intervals(S3). A serial/parallel converter converts the aligned chip sequences into a parallel chip signal having the number of sub-carriers(S4), and a scrambling chip vector generator and a multiplier multiply the parallel chip signal to a scrambling code and transmit it to an inverse Fourier converter(S5). The inverse Fourier converter, the parallel/serial converter and a guard time inserting unit modulate one chip of each sub-carrier to generate a multi-carrier signal, and output it(S6).
Abstract translation: 目的：提供多载波CDMA和存储其程序的记录介质中的加扰系统和方法，以通过根据用户的正交码组合改变扰码来降低PARR（峰值平均功率比）。 构成：符号调制器将第k个用户的比特序列调制成符号（S1），并且乘法器将每个调制符号乘以正交码以将其扩展到码片序列（S2）。 加法器将码片序列与符号定时同步地相加，并且交织器对要发送的M个码元的码片序列执行交织，并且以M码片间隔对准使相同符号的码片（S3）。 串行/并行转换器将对准的码片序列转换成具有子载波数的并行码片信号（S4），并且加扰码片矢量发生器和乘法器将并行码片信号乘以扰码并将其发送到反相 傅里叶变换器（S5）。 逆傅立叶变换器，并行/串行转换器和保护时间插入单元调制每个子载波的一个芯片以产生多载波信号并输出（S6）。
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