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公开(公告)号：KR1020090042763A
公开(公告)日：2009-04-30
申请号：KR1020090002405
申请日：2009-01-12
Applicant: 한국전자통신연구원
CPC classification number: H03M1/662 , H03M2201/173 , H03M2201/30 , H04H20/65 , H04N21/435
Abstract: A transmission method and a device, and a recording medium and a receiving device of digital broadcasting signal are provided to offer different transmission modes for frequency domain and time domain respectively. An allocation unit assigns more than one sub-band and more than one symbol to a modulated service data which is outputted from M digital modulator(S430). An IFFT(Inverse Fast Fourier Transform) converts a signal of a frequency domain to a signal of the time domain about the M service data outputted from the sub-band allocation unit(S440). A frame generator generates a plurality of symbol durations into a frame body of one transfer frame(S450). The frame generator generates a frame header which includes the information about each of M services(S460). A D/A converter converts a transfer frame of a digital signal outputted from the frame generator into an analog signal(S470). The D/A converter transmits the transfer frame converted into an analog signal to a receiving device.
Abstract translation: 提供传输方法和装置，以及数字广播信号的记录介质和接收装置，以分别为频域和时域提供不同的传输模式。 分配单元向从M数字调制器输出的调制业务数据分配多于一个子带和多于一个符号（S430）。 IFFT（逆快速傅里叶变换）将频域的信号转换为关于从子带分配单元输出的M服务数据的时域的信号（S440）。 帧生成器将多个符号持续时间生成到一个传送帧的帧体中（S450）。 帧生成器生成包括关于每个M服务的信息的帧头（S460）。 D / A转换器将从帧发生器输出的数字信号的传送帧转换为模拟信号（S470）。 D / A转换器将转换成模拟信号的传送帧发送到接收设备。
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公开(公告)号：KR100889561B1
公开(公告)日：2009-03-23
申请号：KR1020070061252
申请日：2007-06-21
Applicant: 한국전자통신연구원 , 서울과학기술대학교 산학협력단
IPC: H04N5/913
Abstract: 본 발명은 일정 시간 내에서 제로가 되는 제로상관구간(ZCD) 코드 및 낮은상관구간(LCD) 코드를 발생시켜 워터마킹함으로써, 송신기를 식별할 수 있는 제로상관구간 또는 낮은상관구간 확산 코드를 이용한 디지털 방송 신호 송신 장치 및 수신 장치와, 이의 송신 방법 및 수신 방법에 관한 것으로, 송신기를 식별하기 위한 코드를 워터마킹하여 전송하는 디지털 방송 신호 송신장치에 있어서, 일정시간구간 동안 연속적인 제로상관구간을 갖고 디지털 방송 데이터 필드에 절단오류없이 삽입될 수 있는 제로상관구간(ZCD) 코드 및 낮은상관구간(LCD) 코드를 생성하는 확산코드 생성수단; 수신기에서 상기 ZCD 코드 및 LCD 코드를 이용해 송신기를 인식할 수 있도록 변조된 방송 신호에 상기 확산코드 생성수단에 의해 생성된 ZCD 코드 및 LCD코드를 워터마킹하는 워터마킹수단; 및 상기 워터마킹된 방송 데이터를 방송 신호로 송출하는 방송신호 송출수단을 포함한다.
TxID, ZCD, 코드, LCD, 제로, 상관, 워터마킹, 디지털, 방송, 송신기, 식별-
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。
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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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Patent Agency Ranking
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：KR100873486B1
公开(公告)日：2008-12-15
申请号：KR1020070045234
申请日：2007-05-09
Applicant: 한국전자통신연구원
CPC classification number: H04B7/15585
Abstract: Provided is an on-channel repeater, which includes a receiver for receiving radio frequency (RF) signals; a subtractor for subtracting replica from the RF signals to thereby produce output signals of the subtractor; a repeating process unit for performing a repeating process onto the output signals of the subtractor; and a replica generator for calculating replica based on the output signals of the subtractor and the signals obtained after repeating process performed thereon and feeding the replica back to the subtractor.
Abstract translation: 提供一种同信道中继器，其包括用于接收射频（RF）信号的接收机; 减法器，用于从RF信号中减去副本，从而产生减法器的输出信号; 重复处理单元，用于对减法器的输出信号执行重复处理; 以及副本生成器，用于基于减法器的输出信号和在其上执行的重复处理之后获得的信号来计算副本，并将副本送回减法器。
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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：KR100778336B1
公开(公告)日：2007-11-22
申请号：KR1020060034598
申请日：2006-04-17
Applicant: 한국전자통신연구원
CPC classification number: H04L25/03343 , H04L25/03038 , H04L2025/03375 , H04L2025/03477
Abstract: 1. 청구범위에 기재된 발명이 속한 기술분야
본 발명은 동일채널 중계기의 시간 지연을 줄이기 위한 전치등화 장치 및 그 방법에 관한 것임.
2. 발명이 해결하려고 하는 기술적 과제
본 발명은 업샘플링 과정 이후에 전치등화 필터 계수와 기 주어진 필터 계수로부터 수정된 필터 계수를 생성하여 상기 업샘플링된 신호를 필터링함으로써, 시간 지연을 줄이는 동일채널 중계기의 전치등화 장치 및 그 방법을 제공하는데 그 목적이 있음.
3. 발명의 해결방법의 요지
본 발명은, 신호를 동일 채널로 중계하는 동일 채널 중계기의 전치등화 장치로서, 입력된 필드(Field) 및 세그먼트(Segment) 동기 신호를 조합하여 기저대역 신호를 구성하는 기저대역 신호 구성수단; 상기 구성된 신호에 파일롯 신호를 삽입하는 파일롯 삽입수단; 상기 파일롯 신호가 삽입된 신호를 업샘플링하는 업샘플링수단; 전치등화 필터의 계수를 생성하는 전치등화 필터 계수 생성수단; 상기 전치등화 필터 계수와 기 주어진 필터의 계수를 이용하여 수정된 필터의 계수를 생성하는 수정 필터 계수 생성수단; 및 상기 업샘플링된 신호를 상기 수정된 필터 계수를 이용하여 필터링하는 필터링수단을 포함함.
4. 발명의 중요한 용도
본 발명은 디지털 TV 방송 시스템을 포함한 임의의 전송 시스템에서 동일채널 중계망을 구성하기 위해 이용됨.
동일 채널, 중계기, 변조, 전치 등화-
公开(公告)号：KR1020060112586A
公开(公告)日：2006-11-01
申请号：KR1020050134082
申请日：2005-12-29
Applicant: 한국전자통신연구원
IPC: H04B7/14
CPC classification number: H04B7/155 , H04B7/15564
Abstract: An identical channel repeater and its method are provided to increase the use efficiency of limited frequency resources by relaying a signal whose distortion in a transmission channel has been compensated. An RF receiving unit(701) receives an RF signal from the outside. A down-converter(702) down-converts the RF signal into a signal of a desired band. An inverse channel estimating unit(703) estimates the inverse form of a reception channel from the down-converted signal. An adaptive filtering unit(704) compensates for channel distortion by using a filter having inverse information of the estimated reception channel. An up-converter(705) converts the channel distortion-compensated signal into an RF signal. A transmitter(706) transmits the up-converted RF signal.
Abstract translation: 提供相同的信道中继器及其方法，通过中继传输信道中的失真已被补偿的信号来增加有限频率资源的使用效率。 RF接收单元（701）从外部接收RF信号。 下变换器（702）将RF信号下变频成期望频带的信号。 反向信道估计单元（703）从下变频信号估计接收信道的逆形式。 自适应滤波单元（704）通过使用具有所估计接收信道的反向信息的滤波器来补偿信道失真。 上变频器（705）将信道失真补偿信号转换成RF信号。 发射机（706）发送上变频的RF信号。
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