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公开(公告)号：KR101211115B1
公开(公告)日：2012-12-11
申请号：KR1020090002405
申请日：2009-01-12
Applicant: 한국전자통신연구원
Abstract: 또한프레임헤더는복수의서비스각각에대한정보를포함하며, 복수의서비스각각에대한정보는, 복수의서비스각각이할당된서브밴드및 심볼에대한정보, 복수의서비스각각의채널부호화레벨에대한정보및 복수의서비스각각의디지털변조레벨에대한정보를포함한다.
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12.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：KR1020090042538A
公开(公告)日：2009-04-30
申请号：KR1020070108349
申请日：2007-10-26
Applicant: 한국전자통신연구원
Abstract: A transmission method, a device, a record medium, and receiving device of digital broadcasting signal are provided to multiplex a plurality of service information in a transmission frame to a frequency domain and time domain, and to transmit the plurality of service information in different formats. A encoding unit(310) encodes digital data about M service according to a request of the corresponding service. An M digital modulator(320) modulates the channel encoded service data outputted from the encoding unit. A allocation unit(330) assigns one or more sub-bands and symbols to service data which are digital modulated from the digital modulator. An IFFT(Inverse Fast Fourier Transform) part(340) converts a signal in a frequency domain for M service data outputted from the allocation unit into a signal of a time domain. A frame generator(350) produces a plurality of symbol durations to a frame body of one transmission frame. The frame generator produces a frame header including the information about M service data. A D/A converter(360) converts a transmission frame of a digital signal outputted from the frame generator and transmits the transmission frame converted into an analog signal to a receiving device.
Abstract translation: 提供数字广播信号的发送方法，装置，记录介质和接收装置，以将传输帧中的多个服务信息复用到频域和时域，并以不同格式发送多个服务信息 。 编码单元（310）根据对应服务的请求对M服务的数字数据进行编码。 M数字调制器（320）调制从编码单元输出的信道编码业务数据。 分配单元（330）将一个或多个子带和符号分配给从数字调制器进行数字调制的服务数据。 IFFT（逆快速傅立叶变换）部分（340）将从分配单元输出的M个服务数据的频域中的信号转换为时域的信号。 帧生成器（350）产生到一个传输帧的帧体的多个符号持续时间。 帧生成器产生包括关于M服务数据的信息的帧头。 D / A转换器（360）转换从帧发生器输出的数字信号的发送帧，并将转换成模拟信号的发送帧发送到接收装置。
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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：KR100873487B1
公开(公告)日：2008-12-15
申请号：KR1020070045235
申请日：2007-05-09
Applicant: 한국전자통신연구원
CPC classification number: H04B7/15585
Abstract: Provided are an on-channel repeater and an on-channel repeating method. The on-channel repeater includes: a receiving means for receiving a Radio Frequency (RF) signal; a subtracting means for subtracting a replica of feedback signals from the signal received by the receiving means; a replica generating means for calculating the replica based on the signal acquired from the subtraction in the subtracting means and feeding back the replica to the subtracting means; an inverse channel estimating means for estimating inverse of a reception channel based on the signal acquired from the subtraction in the subtracting means and generating filter tab coefficients; a first adaptive filtering means for compensating for channel distortion of the signal subtracted by the subtracting means based on the filter tab coefficients generated in the inverse channel estimating means; and a transmitting means for converting a signal whose channel distortion is compensated by the first adaptive filtering means into an RF signal and performing radio transmission.
Abstract translation: 提供了同频转发器和同频重复方法。 同频转发器包括：接收装置，用于接收射频（RF）信号; 减法装置，用于从由接收装置接收的信号中减去反馈信号的复制品; 复制品生成装置，用于基于在减法装置中从减法获得的信号计算复制品，并将复制品反馈给减法装置; 逆信道估计装置，用于根据减法装置中的减法获得的信号估计接收信道的倒数，并产生滤波器标签系数; 第一自适应滤波装置，用于基于在反向信道估计装置中产生的滤波器标签系数来补偿由减法装置减去的信号的信道失真; 以及发射装置，用于将其信道失真由第一自适应滤波装置补偿的信号转换为RF信号并执行无线电发射。
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Patent Agency Ranking
公开(公告)号：KR1020080099552A
公开(公告)日：2008-11-13
申请号：KR1020070045234
申请日：2007-05-09
Applicant: 한국전자통신연구원
CPC classification number: H04B7/15585
Abstract: Co-channel relaying equipment and a method thereof are provided to remove noises, multipath signals and residual feedback signals caused by the channel between the main transmitter and a co-channel repeater. Co-channel relaying equipment comprises the followings: receiving units(801,802) which receive radio frequency signals and convert them into signals of a base band; a subtraction means(803) which subtracts the replica of feedback signals from the baseband signals converted by the receiving units; a demodulation means(804) for modulating the subtracted signal; equalization means(805) for equalizing the signal demodulated by the demodulation means; a transmission means(807) which modulates signals outputted from the equalization means, converts them into radio frequency signals, and then wirelessly transmits the converted signals; a down-conversion means(809) for down-converting the radio frequency signals into the base band; and a replica generation means(810) which produces a replica based on the subtracted signal and baseband signal.
Abstract translation: 提供同频道中继设备及其方法，以消除由主发射机和同频道中继器之间的信道引起的噪声，多径信号和残留反馈信号。 共同信道中继设备包括：接收单元（801,802），接收射频信号并将其转换为基带信号; 减法装置（803），其从由接收单元转换的基带信号中减去反馈信号的副本; 用于调制所述减去的信号的解调装置（804）; 均衡装置（805），用于对由解调装置解调的信号进行均衡; 调制从均衡装置输出的信号的发送装置（807）将其转换成射频信号，然后无线地发送转换的信号; 用于将射频信号下变频为基带的下变频装置（809）; 以及基于所减去的信号和基带信号产生副本的副本生成装置（810）。
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17.发明公开파일럿의 삽입 및 파일럿의 특정 배치 패턴을 통하여ＯＦＤＭ 전송 시스템의 전송성능을 높이는 계층 변조 장치및 계층 변조 신호 송수신 장치 및 그 방법 无效用于OFDM传输系统中分层调制的引导和安排的装置和方法
公开(公告)号：KR1020080069495A
公开(公告)日：2008-07-28
申请号：KR1020070069804
申请日：2007-07-11
Applicant: 한국전자통신연구원
CPC classification number: H04L27/3488 , H04H20/28 , H04H20/42 , H04H20/65 , H04L1/0057 , H04L1/0059 , H04L1/0065 , H04L1/007 , H04L5/0007 , H04L5/0048 , H04L5/005 , H04L27/183 , H04L27/2604 , H04L27/2613
Abstract: A hierarchical modulation apparatus for improving a transmission performance of an OFDM transmission system using the insertion and the specific arrangement pattern of a pilot, and a method thereof are provided to improve a receiving performance by additionally transmitting a pilot signal to an enhancement layer signal. A hierarchical modulation apparatus for improving a transmission performance of an OFDM transmission system using the insertion and the specific arrangement pattern of a pilot includes a first channel coding unit(200), a second channel coding unit(210), a pilot insertion unit(220), and a layer modulation unit(240). The first channel coding unit encodes a base layer signal column. The second channel coding unit encodes an enhancement signal column. The pilot insertion unit inserts a pilot into the enhancement signal column. The pilot has the correlation with the base layer signal column corresponding to the same sub carrier with the enhancement layer signal column which is encoded in the second channel coding unit. The layer modulation unit modulates and combines each of the signal columns outputted from the first channel coding unit and the pilot insertion unit.
Abstract translation: 提供了一种使用插入的OFDM传输系统和导频的特定布置模式来提高OFDM传输系统的传输性能的分级调制装置及其方法，用于通过向导频信号附加发送导频信号来提高接收性能。 使用插入的OFDM传输系统和导频的特定布置模式来提高OFDM传输系统的传输性能的分层调制装置包括：第一信道编码单元（200），第二信道编码单元（210），导频插入单元（220） ）和层调制单元（240）。 第一信道编码单元对基本层信号列进行编码。 第二信道编码单元对增强信号列进行编码。 导频插入单元将导频插入增强信号列。 导频与与第二信道编码单元中编码的增强层信号列对应的相同子载波的基本层信号列具有相关性。 层调制单元对从第一信道编码单元输出的信号列和导频插入单元进行调制和组合。
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公开(公告)号：KR1020080051446A
公开(公告)日：2008-06-11
申请号：KR1020060122516
申请日：2006-12-05
Applicant: 한국전자통신연구원
CPC classification number: H04L25/20 , H04B7/15557 , H04B7/15585 , H04H20/06 , H04H20/22 , H04H20/67 , H04L25/03006
Abstract: Distributed repeaters and a repeating method thereof are provided to suppress a noise due to a transmission path between a main transmitter and the repeater and a multipath signal by using a high performance equalizer. An RF(Radio Frequency) receiver(402) receives an RF broadcasting signal from a main transmitter through a reception antenna(401). An IF down-converter(403) converts the RF broadcasting signal into an IF(Intermediate Frequency) signal. A demodulator(404) converts the IF signal from the IF down-converter to a baseband signal. An equalizer(405) equalizes the baseband signal and compensates for a distortion due to a transmission channel. An ID signal generating/inserting unit(406) generates an ID signal with a high correlation property and inserts the ID signal to the baseband signal. A modulator(407) converts the baseband signal into the IF signal. An RF up-converter(408) converts the baseband signal into an RF broadcasting signal. A high power amplifier(409) amplifies the RF broadcasting signal and transmits the amplified result using transmission antennas.
Abstract translation: 提供分布式中继器及其重复方法以通过使用高性能均衡器来抑制由主发射机和中继器之间的传输路径引起的噪声和多径信号。 RF（射频）接收机（402）通过接收天线（401）从主发射机接收RF广播信号。 IF下变频器（403）将RF广播信号转换成IF（中频）信号。 解调器（404）将来自IF下变频器的IF信号转换为基带信号。 均衡器（405）对基带信号进行均衡，并补偿由于传输信道引起的失真。 ID信号生成/插入单元（406）生成具有高相关性的ID信号，并将该ID信号插入到基带信号中。 调制器（407）将基带信号转换成IF信号。 RF上变频器（408）将基带信号转换成RF广播信号。 高功率放大器（409）放大RF广播信号，并使用发送天线发送放大的结果。
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公开(公告)号：KR1020080018078A
公开(公告)日：2008-02-27
申请号：KR1020060125156
申请日：2006-12-08
Applicant: 한국전자통신연구원 , 서울과학기술대학교 산학협력단
IPC: H04B1/7093
CPC classification number: H04B1/7093 , H04B1/7097
Abstract: A partial correlation matched filter for TxID(Transmitter Identification) using an interference cancelled spreading code and a filtering method thereof are provided to deduce correlation characteristics within a short time by minimizing chip correlation operations of a correlation calculation part of a ZCD(Zero Correlation Duration) code having a long period used for watermarking in a receiving terminal, and reduce hardware volume and power consumption. A first shift register(22) shifts a transmitted spreading code. A ZCD code controller(21) outputs a switch signal in order to remove zero components among the spreading codes outputted from the first shift register. A component removing unit removes the zero components from the output of the first shift register through the switch signal of the ZCD code controller. A partial correlator(23) calculates a correlation value with a reference code after receiving the spreading code where the zero components are removed by the zero component removing unit.
Abstract translation: 提供使用干扰抵消的扩展码的TxID（发射机识别）的部分相关匹配滤波器及其滤波方法，以通过使ZCD的相关计算部分（零相关持续时间）最小化码片相关运算来在短时间内推断相关特性， 具有用于在接收终端中进行水印处理的长周期的代码，并且减少硬件体积和功耗。 第一移位寄存器（22）移位发送的扩展码。 ZCD码控制器（21）输出开关信号，以便从第一移位寄存器输出的扩展码中去除零分量。 元件去除单元通过ZCD代码控制器的开关信号从第一移位寄存器的输出中除去零分量。 部分相关器（23）在接收到由零分量去除单元去除零分量的扩展码之后，用参考码计算相关值。
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公开(公告)号：KR100703714B1
公开(公告)日：2007-04-05
申请号：KR1020040118094
申请日：2004-12-31
Applicant: 한국전자통신연구원
IPC: H04N7/015
CPC classification number: H04L25/242 , H04B7/155 , H04L2025/03375 , H04N5/211 , H04N5/38
Abstract: Provided are an on-channel repeater and a method thereof. The repeater receives signals on one channel and distributes the signals on the same channel by converting RF signals from a main transmitter into baseband signals; equalizing them in a high-performance equalizer, adding a repeater identifier to them; modulating the baseband signals with the repeater identifier into RF signals. The repeater includes: a receiver for receiving RF signals; a demodulator for demodulating the RF signals into baseband signals; an equalizer for equalizing the baseband signals; an adder for adding a repeater identifier to the baseband signals; a modulator for modulating the baseband signals with the repeater identifier added in the adder into RF signals; and a transmitter for transmitting the RF signals modulated in the modulator. The technology of the present invention is used to form an on-channel repeating network in an arbitrary transmission system including a digital television broadcasting system.
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