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公开(公告)号：KR1020080053140A
公开(公告)日：2008-06-12
申请号：KR1020060125162
申请日：2006-12-08
Applicant: 한국전자통신연구원
CPC classification number: G06F17/142 , G06F7/38
Abstract: An FFT(Fast Fourier Transform) device for increasing a data processing capacity and a method thereof are provided to increase an FFT processing capacity without increasing hardware by installing and using additional memories in a time-division mode. First and second memory banks(330,340) store input data, and alternatively store FFT processed data. A data processor(370) performs FFT of the input data stored in the first and second memory banks. A first multiplexer(310) selects the input data and the processed data of the data processor alternatively depending on a selection control signal, and stores the selected data to the first memory bank. A second multiplexer(320) selects the input data and the processed data of the data processor alternatively depending on the selection control signal, and stores the selected data to the second memory bank. A third multiplexer(350) selects the input data stored in the first and second memory banks alternatively depending on the selection control signal, and transfers the selected data to the data processor. A fourth multiplexer(360) outputs the processed data stored in the first and second memory banks alternatively depending on the selection control signal. A controller outputs the selection control signal to the multiplexers.
Abstract translation: 提供了用于增加数据处理能力的FFT（快速傅里叶变换）装置及其方法，以通过在时分模式下安装和使用附加存储器来增加FFT处理能力而不增加硬件。 第一和第二存储体（330,340）存储输入数据，或者存储FFT处理的数据。 数据处理器（370）执行存储在第一和第二存储体中的输入数据的FFT。 第一多路复用器（310）根据选择控制信号交替地选择数据处理器的输入数据和处理数据，并将选择的数据存储到第一存储体。 第二多路复用器（320）根据选择控制信号选择数据处理器的输入数据和处理后的数据，并将选择的数据存储到第二存储体。 第三多路复用器（350）根据选择控制信号交替地选择存储在第一和第二存储体中的输入数据，并将选择的数据传送到数据处理器。 第四多路复用器（360）根据选择控制信号交替地输出存储在第一和第二存储体中的处理数据。 控制器将选择控制信号输出到多路复用器。
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公开(公告)号：KR100888505B1
公开(公告)日：2009-03-12
申请号：KR1020070078964
申请日：2007-08-07
CPC classification number: H04L5/0044 , H03M13/1102 , H03M13/23 , H03M13/2707 , H03M13/2778 , H03M13/29 , H03M13/2957 , H03M13/6356 , H03M13/6362 , H03M13/6561 , H04L1/0057 , H04L1/0067 , H04L1/0071
Abstract: 물리 채널이 복수의 시간 영역의 심볼과 복수의 주파수 영역의 부반송파의 조합으로 이루어져 있는 통신 시스템의 송신 장치는 데이터를 복수의 데이터 블록으로 분할한 후에 복수의 데이터 블록을 각각 인터리빙한다. 그리고 나서, 인터리빙된 복수의 데이터 블록을 적어도 하나의 물리 채널에 매핑하여 통신 시스템의 수신 장치로 전송한다. 이와 같이 하면, 데이터 인터리빙에 따른 시간 지연을 감소시킬 수 있다.
부반송파, 심볼, 물리 채널, 트랜스포트 채널, 매핑, 인터리빙-
公开(公告)号：KR1020090010321A
公开(公告)日：2009-01-30
申请号：KR1020070073319
申请日：2007-07-23
CPC classification number: H04L27/261 , H04B1/713 , H04L27/2628 , H04W74/0833
Abstract: An apparatus and a method for generating preamble and an apparatus and a method for detecting a channel response are provided to reduce hardware and a processing time by generating the preamble by using an interpolator and detecting the channel response by using a decimator. A sequence generation part generates a frequency sequence including a plurality of factors in a frequency domain(S110). An IDFT operating part performs an IDFT(Inverse Discrete Fourier Transform) of the frequency sequence generated by the sequence generation part and produces the inverse Fourier transform signal(S120). A protective interval insertion part inserts the protective interval into the inverse Fourier transform signal and produces the protective interval insertion signal(S130). An interpolator performs the interpolation of the protective interval insertion signal and produces an RA preamble(S140). The frequency band of the RA preamble which the interpolator produces is positioned in the base band. A frequency hopping part produces frequency hopped RA preamble by moving the RA preamble of the base band to the frequency band to be transmitted(S150). A transmission part transmits the frequency-hopped RA preamble which the frequency hopping part produces to the channel response detecting device through the channel(S160).
Abstract translation: 提供了一种用于产生前导码的装置和方法，以及用于检测信道响应的装置和方法，以通过使用内插器生成前导码并通过使用抽取器来检测信道响应来减少硬件和处理时间。 序列生成部生成频域中包含多个因子的频率序列（S110）。 IDFT操作部分执行由序列生成部分生成的频率序列的IDFT（离散傅里叶逆变换），并产生傅里叶逆变换信号（S120）。 保护间隔插入部将保护间隔插入到傅里叶逆变换信号中，产生保护间隔插入信号（S130）。 内插器执行保护间隔插入信号的插值并产生RA前导码（S140）。 内插器产生的RA前导码的频带位于基带中。 跳频部分通过将基带的RA前导码移动到要发送的频带来产生跳频的RA前导码（S150）。 发送部通过频道向频道响应检测装置发送跳频部产生的跳频的前导码（S160）。
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公开(公告)号：KR100768108B1
公开(公告)日：2007-10-17
申请号：KR1020060091988
申请日：2006-09-21
Applicant: 한국전자통신연구원
CPC classification number: H04L27/3438 , H04L1/0042 , H04L1/0071
Abstract: A method for configuring a QAM(Quadrature Amplitude Modulation) constellation with hexagonal determination areas and a coded modulation apparatus using the same are provided to reduce an SER(Symbol Error Rate) by increasing the minimum distance between constellation points in comparison with a conventional square constellation. In a method for configuring a QAM constellation with hexagonal determination areas, the hexagonal determination areas with constellation points at the center are arranged according to the modulation order. The hexagonal determination areas are sequentially surrounded around a central point. The minimum distance between the constellation points is maintained equally and the average transmission energy is reduced by using the hexagonal determination area.
Abstract translation: 提供了一种用于配置具有六边形确定区域的QAM（正交幅度调制）星座和使用其的编码调制装置的方法，以通过增加星座点之间的最小距离来减少SER（符号误差率），与常规方阵 。 在配置具有六边形判定区域的QAM星座的方法中，根据调制顺序排列具有中心的星座点的六边形判定区域。 六边形确定区域依次围绕中心点包围。 星座点之间的最小距离保持均匀，并且通过使用六边形确定区域来减小平均传输能量。
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Patent Agency Ranking
公开(公告)号：KR100940872B1
公开(公告)日：2010-02-09
申请号：KR1020070130508
申请日：2007-12-13
IPC: H04B7/26
Abstract: 본 발명은 상향링크 수신단의 유효비트 제어에 적합한 자동 이득 제어 장치 및 그 방법에 관한 것이다. 본 발명에서는 기지국의 수신단에서 수신되는 상향링크 신호의 첫 번째 CP와 심볼의 평균 전력을 측정하여 해당 프레임의 이득 제어를 수행한다. 이득 제어를 위한 평균 전력 측정시 해당 CP와 심볼은 버퍼 내에 저장되고, 버퍼의 출력은 수신 모듈로 출력되지 않도록 경로 제어된다. 전력 측정부는 이득 제어기에서 출력되는 하나의 CP와 심볼에 대해 평균 전력을 측정하며, 측정된 평균 전력의 값에 해당하는 이득 제어 계수를 결정하여 이득 제어기의 이득을 제어한다. 이 때, 서브프레임이 상향링크 채널 추정용 심볼을 전송하는 경우에는 이득 제어 계수를 데이터 심볼만 전송하는 경우에 비해 작게 설정하여 이득 제어기에 의해 선택되는 유효 비트의 수가 작도록 제어한다. 그리고, 첫 번째 데이터 심볼에 대해서 다시 평균 전력을 측정하여 이득 제어를 수행한다. 본 발명에 따르면, 프레임 단위로 실시간 유효 비트를 변경시키면 기지국의 전력 제어에 의한 단말 송신 전력 제어시, 기지국 수신단에 기지국 수신 모듈에서 제어 할 수 있는 입력 비트 레벨을 넘는 경우 올 수 있는 성능 열화를 감쇠시킬 수 있다.
이득 제어, 상향링크, 이득 제어 계수, AGC, ADC-
公开(公告)号：KR100884382B1
公开(公告)日：2009-02-17
申请号：KR1020070073319
申请日：2007-07-23
Abstract: 프리앰블 생성 장치는 주파수 영역에서 시퀀스를 생성하고, 시퀀스를 푸리에 역변환하여 시간 영역에서 푸리에 역변환 신호를 생성하며, 푸리에 역변환 신호를 인터폴레이션하여 프리앰블을 생성한다. 이를 통해 큰 크기의 DFT/IDFT를 사용하지 않고 프리앰블을 생성할 수 있다.
프리앰블, 채널, 응답-
公开(公告)号：KR1020080052144A
公开(公告)日：2008-06-11
申请号：KR1020070031690
申请日：2007-03-30
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2669 , H04L7/10 , H04L27/2695 , H04W56/0035
Abstract: A method and an apparatus for acquiring synchronization of a multi-antenna in an orthogonal frequency division multiple access system are provided to obtain initial synchronization in a terminal having the multi-antenna by searching symbol timing from signals inputted from a terminal to the multi-antenna. An apparatus for acquiring synchronization of a multi-antenna in an orthogonal frequency division multiple access system comprises a signal combiner, an initial symbol timing estimator, a frame detector, a frequency offset estimator, and a timing synchronizer. The signal combiner combines each signal inputted to the multi-antenna. The initial symbol timing estimator estimates initial symbol timing and a fractional multiplicative frequency offset using the combined signal. The frame detector detects a frame starting point based on the estimated value. The frequency offset estimator estimates a frequency offset based on the frame starting point. The timing synchronizer searches symbol timing by compensating the frequency offset.
Abstract translation: 提供了一种用于在正交频分多址系统中获取多天线同步的方法和装置，用于通过从从终端输入到多天线的信号中搜索符号定时，在具有多天线的终端中获得初始同步 。 一种用于在正交频分多址系统中获取多天线同步的装置包括信号组合器，初始符号定时估计器，帧检测器，频率偏移估计器和定时同步器。 信号组合器组合输入到多天线的每个信号。 初始符号定时估计器使用组合信号估计初始符号定时和分数乘法频率偏移。 帧检测器基于估计值检测帧起始点。 频率偏移估计器基于帧起始点估计频率偏移。 定时同步器通过补偿频偏来搜索符号定时。
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公开(公告)号：KR100836625B1
公开(公告)日：2008-06-10
申请号：KR1020060124500
申请日：2006-12-08
Applicant: 한국전자통신연구원
IPC: G06F17/14
CPC classification number: G06F17/141
Abstract: A DFT(double Fourier Transform) device and a method thereof are provided to realize a DFT operation through hardware in a field needing DFT for data not a multiplier of two, reduce a memory by reading data from a buffer and storing the data to the buffer, and reduce latency and increase throughout by reducing an interval between input and output for the DFT. A buffer(200) stores data and a single stage unit(300) generates FT data by performing the FT for the data stored in the buffer. An entire stage controller(100) enables the buffer to store the data, forms a plurality of single stages respectively corresponding to a plurality of even numbers factorizing a resource unit of the data, and controls the FT by using the single stage unit for a plurality of single stage. The entire stage controller is equipped with an even number former(101) including entire stage structure information including the number and the order of single stages corresponding to a plurality of even numbers, and the even number of each single stage, and controls the single stage according to the entire stage structure information for the data stored in the even number former.
Abstract translation: 提供了DFT（双傅立叶变换）装置及其方法，以便在需要DFT的场中通过硬件实现DFT操作，而不是二进制数的数据，通过从缓冲器读取数据并将数据存储到缓冲器来减少存储器 ，并通过减少DFT的输入和输出间隔来减少延迟并增加。 缓冲器（200）存储数据，单级单元（300）通过对存储在缓冲器中的数据执行FT来生成FT数据。 整个级控制器（100）使得缓冲器能够存储数据，形成分别对应于分解数据的资源单元的多个偶数的多个单级，并且通过使用单级单元来控制FT 的单阶段。 整个舞台控制器配备有偶数编号（101），包括整个舞台结构信息，包括与多个偶数相对应的单级的数量和顺序，以及每个单级的偶数，并且控制单级 根据存储在偶数编号中的数据的整个阶段结构信息。
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公开(公告)号：KR100785806B1
公开(公告)日：2007-12-13
申请号：KR1020060115448
申请日：2006-11-21
Applicant: 한국전자통신연구원
IPC: H04B7/26
CPC classification number: H04L5/0048 , H04B7/2621 , H04L5/12 , H04L25/0202
Abstract: A resource allocation method in an SC-FDMA(Single Carrier Frequency Division Multiple Access) communication system for efficient channel estimation and a device are provided to use pilots which are adjacent to all subcarriers allocated to one user for channel estimation even without increasing a PAPR(Peak-to-Average Power Ratio), thereby improving accuracy in channel estimation. Symbols to be sent by a user are divided into at least two groups(S610). DFT(Discrete Fourier Transform) processes are performed for the symbols according to each group to generate DFT data(S620). During resource allocation in long blocks through a distributive method for the DFT data, DFT data of the same sequence of each group are individually allocated to long blocks having neighboring subcarriers(S630). Pilots for the user channel estimation are allocated to short blocks adjacent to the long blocks having the neighboring subcarriers(S640).
Abstract translation: 提供用于高效信道估计的SC-FDMA（单载波频分多址）通信系统中的资源分配方法和设备，以便即使不增加PAPR，也可以使用与分配给一个用户的所有子载波相邻的导频， 峰值功率比），从而提高信道估计的精度。 要由用户发送的符号被划分为至少两个组（S610）。 对于根据每个组的符号执行DFT（离散傅立叶变换）处理以产生DFT数据（S620）。 在通过DFT数据的分配方法的长块资源分配期间，将各组的相同序列的DFT数据分别分配给具有相邻子载波的长块（S630）。 用于用户信道估计的导频被分配给与具有相邻子载波的长块相邻的短块（S640）。
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