-
公开(公告)号：KR101011261B1
公开(公告)日：2011-01-26
申请号：KR1020080103261
申请日：2008-10-21
Applicant: 한국전자통신연구원
Abstract: 본 발명은 디지털 멀티미디어 방송 시스템에서의 수신장치 및 그 방법에 관한 것이다.
본 발명에 따르면, 수신장치는 복수의 안테나를 통해 수신되는 수신신호 별로 파일럿 신호 또는 의사랜덤시퀀스 신호를 검출하고, 검출된 파일럿 신호 또는 의사랜덤시퀀스 신호를 토대로 복수의 안테나를 통해 수신되는 수신신호 각각에 포함된 추가신호에 대한 채널추정을 수행하고 채널프로파일을 생성한다. 그리고, 생성된 채널프로파일을 토대로 획득한 복수의 안테나를 통해 수신되는 수신신호에 포함된 추가신호 각각에 해당하는 주 경로 신호 위치를 일치시킨 뒤 추가신호에 대한 결합 다이버시티를 수행한다. 이후, 결합 다이버시티 처리된 추가신호는 등화기, 주파수 디인터리버, 디맵퍼, 역다중화기 및 채널 디코더를 통해 추가데이터로 출력된다.
T-DMB, 계층변조, 파일럿 신호, PRS, 다이버시티, 채널프로파일-
公开(公告)号：KR1020100043984A
公开(公告)日：2010-04-29
申请号：KR1020080103261
申请日：2008-10-21
Applicant: 한국전자통신연구원
CPC classification number: H04B7/04 , H04H2201/11 , H04L27/01 , H04N19/30 , H04N21/462
Abstract: PURPOSE: A receiving apparatus in a DMB system and a method thereof are provided to reduce influence of a deep null happening for an additional signal, thereby improving a channel feature of the additional signal. CONSTITUTION: Pilot signal detectors(103,104) detect pilot signals about each receiving signal. Channel estimators(105,106) perform channel estimation based on the detected pilot signals. The channel estimators generate channel profiles according to each additional signal. A diversity processor(107) synchronizes locations of main path signals of the additional signals.
Abstract translation: 目的：提供DMB系统中的接收装置及其方法，以减少附加信号的深空发生的影响，从而改善附加信号的信道特征。 构成：导频信号检测器（103,104）检测关于每个接收信号的导频信号。 信道估计器（105,106）基于检测到的导频信号来执行信道估计。 信道估计器根据每个附加信号产生信道分布。 分集处理器（107）使附加信号的主路径信号的位置同步。
-
公开(公告)号：KR1020100021381A
公开(公告)日：2010-02-24
申请号：KR1020090075191
申请日：2009-08-14
Applicant: 한국전자통신연구원
Inventor： 임종수 , 이지봉 , 윤정일 , 배병준 , 김광용 , 양규태 , 최서미 , 김영수 , 배재휘 , 이수인 , 황승구 , 안치득 , 구본태 , 김진규 , 김혁 , 이광순
CPC classification number: H04N21/631 , H03M13/35 , H04N21/2383 , H04N21/4382 , H04N21/64792
Abstract: PURPOSE: An apparatus for transmitting and receiving digital multimedia broadcasting and a method thereof are provided to change the modulation system of the enhancement layer stream according to the broadcasting environment. CONSTITUTION: The base layer processing unit(103) outputs the base layer stream. The enhancement layer processing unit(104) outputs the enhancement layer stream. The transmission unit(105) modulates the enhancement layer stream among the first and second layer modulation mode based on one layer modulation mode. The transmission unit is proceed the mapping of the symbol of the enhancement layer stream based on the symbol location of the base layer stream. The transmission unit is created the transfer frame. The different modulation system is used to the first and second layer modulation mode.
Abstract translation: 目的：提供一种用于发送和接收数字多媒体广播的装置及其方法，以根据广播环境改变增强层流的调制系统。 构成：基层处理单元（103）输出基层流。 增强层处理单元（104）输出增强层流。 传输单元（105）基于一层调制模式在第一和第二层调制模式之间调制增强层流。 发送单元基于基本层流的符号位置进行增强层流的符号的映射。 传输单元被创建为传送框架。 不同的调制方式用于第一和第二层调制方式。
-
公开(公告)号：KR100903877B1
公开(公告)日：2009-06-24
申请号：KR1020070130390
申请日：2007-12-13
Applicant: 한국전자통신연구원
Abstract: 신호 수신 장치는 복수의 안테나를 통해 복수의 신호를 수신하고, 복수의 신호로부터 제1 계층 추정 심볼열 및 복수의 제2 계층 추정 심볼열을 생성하며, 복수의 제2 계층 추정 심볼열에 가중치를 적용하여 복수의 가중치 적용 심볼열을 생성한다. 이후 복수의 가중치 적용 심볼열에 대해 덧셈 연산을 수행하여 다이버시티 신호를 생성하고, 제1 계층 추정 심볼열을 바탕으로 제1 계층 신호를 생성하며, 다이버시티 신호를 바탕으로 제2 계층 신호를 생성한다. 이를 통해 새로 추가되는 신호의 수신율을 높일 수 있다.
방송, 계층 변조, 다이버시티, OFDM-
公开(公告)号：KR1020090061418A
公开(公告)日：2009-06-16
申请号：KR1020070128425
申请日：2007-12-11
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2649 , H04L7/04 , H04N7/015
Abstract: An apparatus and a method for receiving a signal in a digital broadcasting system are provided to improve a reception rate of a newly added signal to the existing digital broadcasting system by generating a first hierarchical signal and a second hierarchical signal based on the hierarchical modulated signal. A plurality of receivers(210) correspond to a plurality of antennas and receive a plurality of signals passing through different paths in a wireless channel by using the plurality of antennas. The plurality of antennas follows a plurality of orientation angles corresponding to the plurality of antennas. The plurality of signals have different channel characteristics according to the plurality of orientation angles. An energy calculator(220) includes information about each energy of the plurality of signals by calculating each energy of the plurality of signals. A signal selector(230) selects one signal among the plurality of signals based on the energy information. A hierarchical modulating unit(250) outputs a first hierarchical modulation signal and a second hierarchical modulation signal by hierarchically modulating the 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，用于通过基于分级调制信号产生第一分层信号和第二分层信号来提高对现有数字广播系统的新添加信号的接收速率。 多个接收器（210）对应于多个天线，并且通过使用多个天线来接收通过无线信道中的不同路径的多个信号。 多个天线遵循对应于多个天线的多个定向角度。 多个信号根据多个取向角具有不同的通道特性。 能量计算器（220）通过计算多个信号中的每个能量来包括关于多个信号中的每个能量的信息。 信号选择器（230）基于能量信息来选择多个信号中的一个信号。 分层调制单元（250）通过对信号进行分层调制来输出第一分层调制信号和第二分层调制信号。
-
Patent Agency Ranking
公开(公告)号：KR1020090014741A
公开(公告)日：2009-02-11
申请号：KR1020070078919
申请日：2007-08-07
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2604 , H04L25/0224 , H04L27/2649
Abstract: An apparatus and a method for demodulation in a transmission system are provided to improve reception of an addition layer by using a pilot existing in an addition layer signal. A receiver(210) receives the signal in the form of a transfer frame and the signal comprises a phase reference symbol, a fast information channel and a main service channel. A pilot information storage unit(230) stores location information of a pilot included in the main service channel. A primary channel estimating unit(244) channel-estimates the phase reference symbol and outputs a primary channel estimated value. According to the channel estimated value of the phase reference symbol, the second channel estimating unit(245) channel-estimates the fast information channel and outputs the second channel estimated value. According to the channel estimated value on the basis of the location information of the pilot the fast information channel, a third channel estimating unit(246) channel-estimates the main service channel and outputs the third channel estimated value. According to the primary channel estimated value, the second channel estimated value and the third channel estimated value, a channel equalization part(247) channel-equalizes the signal and outputs a channel-equalized signal.
Abstract translation: 提供一种用于在传输系统中进行解调的装置和方法，以通过使用存在于加法层信号中的导频来改善加法层的接收。 接收机（210）以传送帧的形式接收信号，该信号包括相位参考符号，快速信息信道和主服务信道。 导频信息存储单元（230）存储主服务信道中包含的导频的位置信息。 主信道估计单元（244）信道估计相位参考符号并输出主信道估计值。 根据相位参考符号的信道估计值，第二信道估计单元（245）对快速信息信道进行信道估计，并输出第二信道估计值。 根据基于导频的快速信息信道的位置信息的信道估计值，第三信道估计单元（246）对主服务信道进行信道估计，并输出第三信道估计值。 根据主信道估计值，第二信道估计值和第三信道估计值，信道均衡部分（247）对信号进行信道均衡并输出信道均衡信号。
-
公开(公告)号：KR1020090008852A
公开(公告)日：2009-01-22
申请号：KR1020070072151
申请日：2007-07-19
Applicant: 한국전자통신연구원
IPC: H04L27/26
CPC classification number: H04L27/2604 , H03M13/1102 , H03M13/23 , H03M13/2957 , H03M13/356 , H04L27/261
Abstract: An apparatus and a method for hierarchical modulation are provided to improve reception performance without affecting a basic layer by inserting a pilot into an additional layer. A basic hierarchical channel encoder(110) generates a basic layer symbol string by encoding the basic layer signal string. A basic hierarchical modulation unit of a hierarchical modulation unit(150) generates the basic hierarchical modulation symbol string by modulating the base hierarchical symbol string. An additional hierarchical channel encoder(120) generates the additional hierarchical symbol string by encoding the additional hierarchical signal string. A pilot insertion unit(130) generates a pilot insertion symbol string by inserting the pilot to the addition hierarchical symbol string. The additional hierarchical modulation unit of the hierarchical modulation unit generates the additional hierarchical modulation symbol string by modulating the pilot insertion symbol string. The symbol mapping unit generates the hierarchical modulation signal by mapping the basic hierarchical modulation symbol string and the additional hierarchical symbol string to a signal space. A normalization unit normalizes the hierarchical modulation signal and generates the normalized hierarchical modulation signal.
Abstract translation: 提供了用于分级调制的装置和方法，以通过将导频插入附加层来改善接收性能而不影响基本层。 基本层级信道编码器（110）通过对基本层信号串进行编码来生成基本层符号串。 分级调制单元（150）的基本分级调制单元通过调制基本分层符号串来生成基本分级调制符号串。 附加分层信道编码器（120）通过对附加分层信号串进行编码来生成附加分层符号串。 导频插入单元（130）通过将导频插入加法分级符号串来生成导频插入符号串。 分级调制单元的附加分层调制单元通过调制导频插入符号串来产生附加分层调制符号串。 符号映射单元通过将基本分层调制符号串和附加分层符号串映射到信号空间来生成分层调制信号。 归一化单元对分级调制信号进行归一化，并生成归一化分级调制信号。
-
公开(公告)号：KR1020080112074A
公开(公告)日：2008-12-24
申请号：KR1020070116459
申请日：2007-11-15
Applicant: 한국전자통신연구원
IPC: H04N21/236
CPC classification number: H04N21/64315 , H04N19/39 , H04N21/234327 , H04N21/236
Abstract: A transmission method of a digital broadcasting signal is provided to offer a various high quality service by supplying broadcasting service with higher data transmitting rate than conventional digital broadcasting. A first frame including the first service stream for restoring the service of the first quality is produced(S220). A second frame including the second service stream for restoring the service of the second quality higher than the first quality in addition to the first service stream is produced(S230). The first and the second frame are modulated to the first layer and the second layer(S240). A first transmission frame and the second transmission frame of the enhancement layer are transmitted(S250).
Abstract translation: 提供数字广播信号的发送方法，通过提供比传统数字广播更高的数据发送速率的广播业务来提供各种高质量的业务。 产生包括用于恢复第一品质的服务的第一服务流的第一帧（S220）。 产生除了第一服务流之外还包括用于恢复比第一品质高的第二品质的服务的第二服务流的第二帧（S230）。 第一和第二帧被调制到第一层和第二层（S240）。 发送第一传输帧和增强层的第二传输帧（S250）。
-
公开(公告)号：KR100874266B1
公开(公告)日：2008-12-16
申请号：KR1020070039226
申请日：2007-04-23
Applicant: 한국전자통신연구원
Abstract: A method and an apparatus for receiving a broadcasting signal through a digital multimedia broadcasting network are provided to improve sensitivity of an OFDM receiver by removing an IFFT(Inverse Fast Fourier Transform) unit in the OFDM(Orthogonal Frequency Division Multiplexing) receiver. An apparatus for receiving a broadcasting signal through a digital multimedia broadcasting network includes a correlation value generator(44), a frame synchronization estimator(45), a gain estimator(46), and a symbol timing offset unit(47). The correlation value generator correlates a synchronization signal, which is included in a time domain reception signal, with a reference signal, and generates a correlation value in the time domain. The frame synchronization estimator compares the time domain correlation value with a reference value. The gain estimator determines a gain based on the time domain correlation value. The symbol timing offset unit detects a sample index of the correlation value with the determined gain.
Abstract translation: 提供了一种通过数字多媒体广播网络接收广播信号的方法和设备，通过去除OFDM（正交频分复用）接收机中的IFFT（快速傅里叶逆变换）单元来提高OFDM接收机的灵敏度。 一种用于通过数字多媒体广播网络接收广播信号的设备包括相关值发生器（44），帧同步估计器（45），增益估计器（46）和码元定时偏移单元（47）。 相关值生成器将包括在时域接收信号中的同步信号与参考信号相关，并且在时域中生成相关值。 帧同步估计器将时域相关值与参考值进行比较。 增益估计器基于时域相关值确定增益。 符号定时偏移单元利用确定的增益来检测相关值的样本索引。
-
公开(公告)号：KR1020080097556A
公开(公告)日：2008-11-06
申请号：KR1020070042568
申请日：2007-05-02
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2657 , H04L27/16 , H04L27/2666
Abstract: An apparatus and a method for estimating a frequency offset improve reception performance of a mobile communication system and reduce complexity of the system by estimating interval of a subcarrier up to integral number or prime number times. A first correlative value is calculated by correlating the received signal with a signal of a first block corresponding to a part of a protective section of a reference symbol included in the received signal. A second correlative value is calculated by correlating the received signal with a signal of a second block corresponding to a part of a protective section. The first correlative value is time-delayed(S540). The frequency offset is estimated by using the delayed first and second correlative values.
Abstract translation: 用于估计频率偏移的装置和方法提高了移动通信系统的接收性能，并通过估计子载波的间隔达到整数或素数次来降低系统的复杂度。 通过将接收到的信号与对应于包括在接收信号中的参考符号的保护部分的一部分的第一块的信号进行相关来计算第一相关值。 通过将接收的信号与对应于保护部分的一部分的第二块的信号相关联来计算第二相关值。 第一个相关值是时间延迟的（S540）。 通过使用延迟的第一和第二相关值来估计频率偏移。
-
-
-
-
-
-
-
-
-
Search Results
91
records
(took 0.036 seconds)
