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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。
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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）。
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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。
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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。
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公开(公告)号：KR1020080050244A
公开(公告)日：2008-06-05
申请号：KR1020070068693
申请日：2007-07-09
Applicant: 한국전자통신연구원 , 부산대학교 산학협력단
CPC classification number: H04L27/01 , H04L27/20 , H04L27/2675 , H04L27/2695
Abstract: A method and an apparatus for channel equalization are provided to prevent a noise from being amplified by decreasing a variance of a channel equalization signal. A channel estimation apparatus includes a channel interpolator(41), a mapper(42), and an equalizer(43). The channel interpolator delivers an estimated channel coefficient for a sub-carrier of a symbol to the equalizer. The mapper delivers the estimated basic layer symbol to the equalizer. The equalizer equalizes the channel by using the received symbol, the channel coefficient received from the channel interpolator, and the basic layer symbol received from the mapper.
Abstract translation: 提供了用于信道均衡的方法和装置，以通过减小信道均衡信号的方差来防止噪声被放大。 信道估计装置包括信道内插器（41），映射器（42）和均衡器（43）。 信道内插器将用于符号的子载波的估计信道系数递送到均衡器。 映射器将估计的基本层符号传递给均衡器。 均衡器通过使用接收的符号，从信道插值器接收的信道系数和从映射器接收的基本层符号来均衡信道。
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Patent Agency Ranking
公开(公告)号：KR101382613B1
公开(公告)日：2014-04-07
申请号：KR1020070108780
申请日：2007-10-29
Applicant: 한국전자통신연구원
CPC classification number: H04H60/07 , H04H20/67 , H04N21/23602 , H04N21/23614
Abstract: 지상파 DMB에 있어서, 전송 장치는 임의의 서비스에 대하여 생성된 복수의 서비스 스트림을 복수의 앙상블로 다중화한다. 이때, 복수의 앙상블 각각에 대한 전송 프레임 각각의 타임 스탬프 필드에 동일한 송출 시간 데이터를 구성한다. 이와 같이 하면, 복수의 송신 장치가 동일한 서비스에 대한 서비스 스트림을 포함하는 복수의 전송 프레임을 동일한 시간에 송출하여, 수신 장치가 사실상 동일한 시각에 복수의 전송 프레임을 수신할 수 있다.
지상파 DMB, 앙상블, ETI, TIST, 타임스탬프, 프레임 다중화-
17.发明授权
公开(公告)号：KR101289886B1
公开(公告)日：2013-07-24
申请号：KR1020100009848
申请日：2010-02-03
Applicant: 한국전자통신연구원
CPC classification number: H04N21/2368 , H04N21/234327 , H04N21/2362 , H04N21/2365 , H04N21/4345 , H04N21/631
Abstract: 본 발명에 따른 송신 장치는 방송 서비스를 위한 송신 장치로서, 기본 계층 기초 스트림 및 향상 계층 기초 스트림을 수신하여 각각의 동기 계층(sync layer, SL) 패킷을 생성하는 SL 패킷화기, 상기 SL 패킷 각각을 패킷 단위 기초 스트림 (packetized elementary stream, PES) 패킷으로 변환하는 PES 패킷화기, 상기 PES 패킷을 다중화하여 기본 계층 전송 스트림(transport stream)을 출력하는 제1 TS 다중화부, 그리고 상기 PES 패킷을 다중화하여 향상 계층 전송 스트림을 출력하는 제2 TS 다중화부를 포함하고, 상기 제2 TS 다중화부는 상기 향상 계층 전송 스트림이 상기 기본 계층 전송 스트림에 의존하는 지 여부에 대한 정보를 포함하는 서술자를 상기 향상 계층 전송 스트림에 삽입한다.
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公开(公告)号：KR101105400B1
公开(公告)日：2012-01-17
申请号：KR1020090013034
申请日：2009-02-17
Applicant: 한국전자통신연구원
Abstract: 본 발명은 채널 추정 및 등화 방법 그리고 그 장치에 관한 것이다.
방송 수신 시스템에서 수신 신호를 토대로 채널을 추정하고 등화하는 장치는 수신 신호- 수신 신호는 기본 계층 신호와 향상 계층 신호가 계층 변조되어 있음-에서 크기 정보를 추출하고, 크기 정보를 필터링 하여 채널을 추정하며, 추정한 채널을 토대로 추출한 크기 정보를 등화한다. 다음, 장치는 등화된 크기 정보를 토대로 향상 계층 신호-향상 계층으로 기본 계층 신호에 부가되는 서비스를 제공하는 신호-를 추출한다.
이로써, 본 발명은 크기 정보를 이용하는 채널 추정 및 등화 방법을 통해 데이터의 수신 성능을 증가시킬 수 있다.
디지털 멀티미디어 방송, OFDM, 채널 추정, 등화-
公开(公告)号：KR1020110065313A
公开(公告)日：2011-06-15
申请号：KR1020100104785
申请日：2010-10-26
Applicant: 한국전자통신연구원
IPC: H04H60/72
CPC classification number: H04H60/72 , H04H2201/11 , H04H2201/14
Abstract: PURPOSE: A broadcasting service providing method of a broadcasting signal transceiving apparatus is provided to transmit integrated EPG information including physical channel information though an additionally secured improved layer. CONSTITUTION: A broadcasting signal receiving apparatus receives integrated EPG(Electronic Program Guide) information with the selection of an integrated EPG channel(S1110). The broadcasting signal receiving apparatus extracts the physical channel information of each frequency block within a corresponding broadcasting frequency with the analysis of the integrated EPG information(S1120,S1130). If a user selects a special channel, the broadcasting signal receiving apparatus moves to a channel within a corresponding frequency block with the extracted physical channel information(S1140,S1150). The broadcasting signal receiving apparatus extracts a broadcasting service from a corresponding channel(S1160).
Abstract translation: 目的：提供一种广播信号收发装置的广播服务提供方法，用于通过附加保护的改进层传输包括物理信道信息的集成EPG信息。 构成：广播信号接收装置通过选择集成EPG信道来接收综合EPG（电子节目指南）信息（S1110）。 广播信号接收装置通过对集成EPG信息的分析，提取相应广播频率内的每个频率块的物理信道信息（S1120，S1130）。 如果用户选择特殊频道，则广播信号接收装置利用所提取的物理频道信息移动到相应频率块内的频道（S1140，S1150）。 广播信号接收装置从对应的频道提取广播业务（S1160）。
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公开(公告)号：KR1020100059642A
公开(公告)日：2010-06-04
申请号：KR1020090013033
申请日：2009-02-17
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2646 , H04L27/01 , H04L27/265 , H04N7/015
Abstract: PURPOSE: An apparatus and a method of channel estimation and equalization are provided to improve data reception performance are provided to equalize fast Fourier transformed signal by estimated channel of the second channel estimation module in the first estimation module again, thereby improving receiving ability of data. CONSTITUTION: An equalization module(310) equalizes an FFT(Fast Fourier Transform)-performed signal by a former channel. A first channel estimation module(320) presumes a channel for an OFDM (Orthogonal Frequency Division Multiplexing) symbol of a currently received signal by an output signal of the first equalization module. A second equalization module(330) equalizes a received signal by a transmission channel about an estimated current OFDM symbol. A signal extraction module(340) extracts an enhancement layer signal based on an output signal of the second equalization module.
Abstract translation: 目的：提供信道估计和均衡的装置和方法，以提高数据接收性能，以便通过第一估计模块中的第二信道估计模块的估计信道再次平均快速傅里叶变换信号，从而提高数据的接收能力。 构成：均衡模块（310）通过前一个通道来均衡FFT（快速傅里叶变换）执行信号。 第一信道估计模块（320）通过第一均衡模块的输出信号假设当前接收信号的OFDM（正交频分复用）符号的信道。 第二均衡模块（330）通过关于估计的当前OFDM符号的传输信道对接收信号进行均衡。 信号提取模块（340）基于第二均衡模块的输出信号提取增强层信号。
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