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公开(公告)号：KR1020110101091A
公开(公告)日：2011-09-15
申请号：KR1020110019461
申请日：2011-03-04
Applicant: 한국전자통신연구원
CPC classification number: H03M13/6393 , H03M13/005 , H03M13/1102 , H03M13/155 , H03M13/6505 , H03M13/6508 , H04B1/02 , H04L1/0013 , H04L1/0043
Abstract: 본 발명은, 통신 시스템에서 저밀도 패리티 검사(LDPC: Low-Density Parity Check) 부호화 방식을 이용하여 데이터를 송신하는 데이터 송신 장치 및 방법에 관한 것으로, 전송하고자 하는 데이터에 적용되는 가변 부호화율 및 변조 차수를 기반으로 저밀도 패리티 검사 부호의 패리티 검사 행렬을 생성하고, 상기 가변 부호화율 및 변조 차수를 지원하도록 상기 생성한 패리티 검사 행렬에 천공(puncturing) 또는 확장(extending)을 고려하여 최적의 패리티 검사 행렬을 생성하고, 상기 최적의 패리티 검사 행렬을 통해 상기 전송하고자 하는 데이터의 정보 비트를 저밀도 패리티 검사 부호화하며, 상기 저밀도 패리티 검사 부호화된 정보 비트를 전송 우선 순위에 따라 분류한 후, 변조 심볼에 매핑하여 송신한다.
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公开(公告)号：KR1020110095139A
公开(公告)日：2011-08-24
申请号：KR1020110008265
申请日：2011-01-27
Applicant: 한국전자통신연구원 , 명지대학교 산학협력단
CPC classification number: H04B7/024 , H04B7/0413 , H04B7/0857 , H04L1/004 , H04N7/015
Abstract: PURPOSE: A communication method between a base station and a terminal is provided to obtain a receiving diversity and an MRC(Maximal-Ratio Combining) effect by using a multiple input multiple output method. CONSTITUTION: Data including an error correction code is transmitted to a terminal based on the type of a base station. The type of the base station is determined by the various parameter which is used by the base station. The base station differentiates the data and the data transmission period which is determined by the type of the base station. The base station creates signal by the type of each base station and transmits the signal to a signal receiving part.
Abstract translation: 目的：提供基站与终端之间的通信方法，通过使用多输入多输出方式来获得接收分集和MRC（最大比组合）效果。 构成：根据基站的类型将包括纠错码的数据发送到终端。 基站的类型由基站使用的各种参数确定。 基站对由基站的类型确定的数据和数据传输周期进行区分。 基站通过每个基站的类型创建信号，并将该信号发送到信号接收部分。
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公开(公告)号：KR100964382B1
公开(公告)日：2010-06-17
申请号：KR1020080067448
申请日：2008-07-11
Applicant: 한국전자통신연구원
CPC classification number: H04L23/02 , H04H20/95 , H04L5/0016 , H04L5/0048 , H04L25/0226
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64.发明授权직교주파수 분할 다중 전송 시스템에서 수신 신호의 채널등화 장치 및 방법, 및 이를 적용한 디엠비 수신장치 有权직교주파수분할다중전송시스템에서수신신호의채널등화장치및방법，및이를적용한디엠비수신장치
公开(公告)号：KR100930792B1
公开(公告)日：2009-12-09
申请号：KR1020070090977
申请日：2007-09-07
Applicant: 한국전자통신연구원
Abstract: An apparatus and a method for equalizing the reception channel in an OFDM(Orthogonal Frequency Division Multiplexing) transmission system and a DMB(Digital Multimedia Broadcasting) receiving apparatus applying the same are provided to improve the performance of mobile reception in a transmission system in which pilot signal is not used. A channel estimator(520) estimates channel as a symbol unit with the reference signal received from the standard signal creation part(550). A channel filtering part(530) removes the noises of the presumed channel value. A channel equalization part(540) equalizes the channel by using the estimation channel value. The channel estimator estimates the PRS(Phase Reference Symbol) of the received frame by the reference signal.
Abstract translation: 提供了一种用于在OFDM（正交频分复用）传输系统中均衡接收信道的设备和方法以及应用该设备和方法的DMB（数字多媒体广播）接收设备，以改善传输系统中的移动接收的性能，在该传输系统中， 信号未被使用。 信道估计器（520）将信道估计为具有从标准信号创建部分（550）接收的参考信号的符号单元。 信道滤波部分（530）去除推测信道值的噪声。 信道均衡部分（540）通过使用估计信道值来对信道进行均衡。 信道估计器通过参考信号估计接收帧的PRS（相位参考符号）。
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公开(公告)号：KR1020090122096A
公开(公告)日：2009-11-26
申请号：KR1020080067448
申请日：2008-07-11
Applicant: 한국전자통신연구원
CPC classification number: H04L23/02 , H04H20/95 , H04L5/0016 , H04L5/0048 , H04L25/0226
Abstract: PURPOSE: A transmitting/receiving method and device for a digital multimedia broadcasting is provided to offer high quality service in high speed movement by applying the OFDM-CDMA transmission technique to the digital multimedia broadcasting system. CONSTITUTION: The pilot signal is generated by mapping the transferred information with the orthogonal code(S610). The pilot signal is diffused to the frequency domain(S630). The expanded pilot signal is modulated and transmitted. The transferred information comprises the transmission parameter for demodulating the received signal by the receiving device. The pilot signal is reiterated and inserted in a plurality of subcarriers.
Abstract translation: 目的：提供一种用于数字多媒体广播的发送/接收方法和装置，通过将OFDM-CDMA传输技术应用于数字多媒体广播系统来提供高速移动中的高质量服务。 构成：通过用正交码映射传送的信息来生成导频信号（S610）。 导频信号扩散到频域（S630）。 扩展的导频信号被调制和传输。 所传输的信息包括用于由接收装置解调接收到的信号的传输参数。 导频信号被重复并插入到多个子载波中。
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Patent Agency Ranking
公开(公告)号：KR1020090062906A
公开(公告)日：2009-06-17
申请号：KR1020070130390
申请日：2007-12-13
Applicant: 한국전자통신연구원
CPC classification number: H04L1/02 , H04B7/0857 , H04L27/2649
Abstract: An apparatus and a method for receiving a signal in a digital broadcasting system are provided to improve a reception rate of a signal by applying a diversity method. A plurality of symbol estimation modules(210) receives a plurality of frequency multiplexing signals and outputs a first hierarchical estimation symbol row and a plurality of second hierarchical estimation symbol rows. A signal processor(220) diversity-signal-processes the plurality of second hierarchical estimation symbol rows and outputs the diversity signal. A first hierarchical symbol demapping unit(230) demaps the first hierarchical estimation symbol row and outputs the first hierarchical estimation demapping signal. A second hierarchical symbol demapping unit(240) demaps the diversity signal and outputs the second hierarchical symbol demapping signal. A first hierarchical decoder(250) channel-decodes the first hierarchical symbol demapping signal and outputs the first hierarchical decoding signal. A second hierarchical decoder(260) channel-decodes the second hierarchical symbol demapping signal and outputs the second hierarchical decoding signal.
Abstract translation: 提供一种用于在数字广播系统中接收信号的装置和方法，以通过应用分集方法来提高信号的接收速率。 多个符号估计模块（210）接收多个频率复用信号并输出第一分层估计符号行和多个第二分层估计符号行。 信号处理器（220）对多个第二分层估计符号行进行分集信号处理，并输出分集信号。 第一分层符号解映射单元（230）对第一分层估计符号行进行解映射并输出第一分层估计解映射信号。 第二分层符号解映射单元（240）解映射分集信号并输出第二分层符号解映射信号。 第一分层解码器（250）对第一分层符号解映射信号进行信道解码并输出第一分层解码信号。 第二分层解码器（260）对第二分层符号解映射信号进行信道解码并输出第二分层解码信号。
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公开(公告)号：KR100890440B1
公开(公告)日：2009-03-30
申请号：KR1020070130940
申请日：2007-12-14
Applicant: 한국전자통신연구원
Abstract: A receiving apparatus and a synchronization detecting method for detecting synchronization more accurately are provided to detect starting point of sampling and a starting point of a frame by using receiving signal corresponding to a sampling interval and a phase reference signal. A signal detection unit(110) detects the null signal and phase reference signal from the received signal. A synchronization detector(120) detects the first start time point of frame by using the null signal. A plurality of first delay taps corresponding to a plurality of coefficient of correlations determined by the phase reference signal and the second delay tap corresponding to the sampling period ringed with over sample are used. The second start time point of frame is detected from the first start time point.
Abstract translation: 提供了一种用于更精确地检测同步的接收装置和同步检测方法，以通过使用与采样间隔和相位参考信号相对应的接收信号来检测采样的起始点和帧的起始点。 信号检测单元（110）从接收信号中检测零信号和相位参考信号。 同步检测器（120）通过使用空信号检测帧的第一起始时间点。 使用对应于由相位参考信号确定的多个相关系数的多个第一延迟抽头和对应于采样周期振铃的采样周期的第二延迟抽头。 从第一起始时间点检测帧的第二起始时间点。
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公开(公告)号：KR100884381B1
公开(公告)日：2009-02-17
申请号：KR1020070042568
申请日：2007-05-02
Applicant: 한국전자통신연구원
Abstract: 본 발명은 이동통신 시스템에서 주파수 옵셋 추정 방법 및 장치에 관한 것이다. 본 발명은 수신 신호에 포함된 기준 심볼의 보호 구간 중 일부에 해당하는 제1 블록의 신호와 상기 수신 신호를 상관하여 제1 상관값을 계산하고, 상기 보호 구간 중 일부에 해당하는 제2 블록의 신호와 상기 수신 신호를 상관하여 제2 상관값을 계산한 후, 상기 제1 상관값을 시간 지연시키고, 상기 지연시킨 제1 상관값의 켤레 복소수와 상기 제2 상관값을 곱하고, 상기 곱한 값의 위상값을 상기 제1 블록과 상기 제2 블록의 시간 간격으로 나누어 주파수 옵셋을 추정한다.
OFDM, 지상파 DMB, 주파수 옵셋 추정, 동기-
公开(公告)号：KR100875935B1
公开(公告)日：2008-12-26
申请号：KR1020070067185
申请日：2007-07-04
Applicant: 한국전자통신연구원 , 부산대학교 산학협력단
IPC: H04J11/00
Abstract: A method and an apparatus for hierarchical modulation/demodulation in an OFDM(Orthogonal Frequency Division Multiplexing) system are provided to perform an in-phase demodulation by using a pilot which is transferred to a second layer. A hierarchical modulation apparatus in an OFDM system includes first and second encoders(110,120), a pilot insertion unit(130), and a hierarchical modulation unit(140). The first encoder encodes a first layer signal stream, which is a basic layer signal. The second encoder encodes a second layer signal stream which is an enhancement layer signal. The pilot insertion portion inserts a pilot signal for estimating a channel coefficient to an encoded second layer signal stream. The hierarchical modulation portion modulates the second layer signal stream, to which the pilot signal is inserted, and the encoded first layer signal stream, and combines the encoded signals with each other.
Abstract translation: 提供了用于OFDM（正交频分复用）系统中的分层调制/解调的方法和装置，以通过使用传送到第二层的导频来执行同相解调。 OFDM系统中的分层调制装置包括第一和第二编码器（110,120），导频插入单元（130）和分层调制单元（140）。 第一编码器对第一层信号流进行编码，该第一层信号流是基本层信号。 第二编码器对作为增强层信号的第二层信号流进行编码。 导频插入部分将用于估计信道系数的导频信号插入编码的第二层信号流。 分层调制部分对导频信号所插入的第二层信号流和编码的第一层信号流进行调制，并将编码信号彼此组合。
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70.发明授权
公开(公告)号：KR100861318B1
公开(公告)日：2008-10-01
申请号：KR1020070086075
申请日：2007-08-27
Applicant: 한국전자통신연구원 , 경희대학교 산학협력단
IPC: H03H21/00
CPC classification number: H03H21/00 , H03H17/02 , H03H17/0227 , H03H21/0012 , H03H21/0025
Abstract: An adaptive filter and method for detecting an optimum spectrum, and a spectrum detection apparatus using the same and a method thereof are provided to detect a spectrum by using an adaptive filter for reducing a noise under a time variable environment. An adaptive filter for detecting an optimum spectrum includes a data vector calculation unit(11), a coefficient vector calculation unit(12), an average calculation unit(13), and a convolutional calculation unit(14). The data vector calculation unit calculates a data vector of p-dimension from an input signal based on a degree of a predetermined adaptive filter. The coefficient vector calculation unit calculates a coefficient vector based on the data vector calculated by the data vector calculation unit. The average calculation unit calculates an average of the coefficient vector calculated by the coefficient vector calculation unit. The convolutional calculation unit calculates a convolution of the input signal and the average of the coefficient vector calculated by the average calculation unit.
Abstract translation: 提供了一种用于检测最佳频谱的自适应滤波器和方法，以及使用该频谱检测装置的频谱检测装置及其方法，用于通过使用用于在时间可变环境下降低噪声的自适应滤波器来检测频谱。 用于检测最佳频谱的自适应滤波器包括数据矢量计算单元（11），系数矢量计算单元（12），平均计算单元（13）和卷积计算单元（14）。 数据矢量计算单元基于预定的自适应滤波器的程度从输入信号计算p维的数据矢量。 系数向量计算单元基于由数据矢量计算单元计算的数据矢量来计算系数矢量。 平均计算单元计算由系数向量计算单元计算的系数向量的平均值。 卷积计算单元计算输入信号的卷积和由平均计算单元计算的系数矢量的平均值。
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