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公开(公告)号：KR100880046B1
公开(公告)日：2009-01-22
申请号：KR1020070108528
申请日：2007-10-26
Applicant: 한국전자통신연구원
CPC classification number: H04H20/59 , H04H20/02 , H04N21/414 , H04N21/440236
Abstract: An apparatus and a method of relaying a digital multimedia broadcast for an emergency broadcasting service are provided to convert a currently broadcast digital multimedia broadcasting signal to an emergency signal, and transmit the emergency signal, thereby easily providing the emergency broadcasting service to a specific area. A broadcasting relay apparatus(100) comprises a broadcasting receiving unit(110), an emergency signal generating unit(130), a signal switching unit(120) and a broadcasting transmitting unit(140). The emergency signal generating unit encodes, multiplexes and modulates an emergency broadcasting message inputted from a user to be suitable for channel information of a broadcasting signal. The emergency signal generating unit generates an emergency signal. The signal switching unit switches a signal to be connected to one of the broadcasting receiving unit and the emergency signal generating unit. The broadcasting transmitting unit transmits a broadcasting signal or an emergency signal outputted from the signal switching unit.
Abstract translation: 提供一种用于中继紧急广播业务的数字多媒体广播的装置和方法，用于将当前广播的数字多媒体广播信号转换为紧急信号，并发送紧急信号，从而容易地向特定区域提供紧急广播业务。 广播中继装置（100）包括广播接收单元（110），紧急信号生成单元（130），信号切换单元（120）和广播发送单元（140）。 紧急信号发生单元编码，复用和调制从用户输入的适合于广播信号的频道信息的紧急广播消息。 紧急信号生成部生成紧急信号。 信号切换单元切换要连接到广播接收单元和紧急信号发生单元之一的信号。 广播发送单元发送从信号切换单元输出的广播信号或紧急信号。
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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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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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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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55.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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Patent Agency Ranking
公开(公告)号：KR1020080052085A
公开(公告)日：2008-06-11
申请号：KR1020060124121
申请日：2006-12-07
Applicant: 한국전자통신연구원 , 부산대학교 산학협력단
CPC classification number: H04L27/389 , H04L5/0007 , H04L25/0224 , H04L27/02 , H04L27/2071 , H04L27/2075 , H04L27/3483 , H04L27/361
Abstract: An apparatus and a method for applying amplitude-differential phase shift keying are provided to maintain compatibility of main transmission data to a pre-differential phase shift keying and to improve a transmitting speed by modulating the main transmission data with a differential phase shift keying manner and modulating additional transmission data with the other differential phase shift keying manner. An apparatus and a method for applying amplitude-differential phase shift keying includes a first modulating unit modulating a first data sequence with a differential phase shift keying manner. A second modulating unit modulates a second data sequence with an amplitude shift and inserts a pilot signal to the amplitude shift modulated signal. A multiplier outputs after multiplying output data of first and second modulating units. The pilot signal is periodically or non-periodically inserted at a position of a sub-carrier of the amplitude shift modulated signal. A first demodulating unit(31) receives an amplitude-differential phase shift keying modulated signal and demodulates the received signal with the differential phase shift keying. A second demodulating unit(324) extracts the pilot signal from the received signal.
Abstract translation: 提供了一种应用幅度相移键控的装置和方法，以保持主传输数据与预差分相移键控的兼容性，并通过以差分相移键控方式调制主传输数据来提高传输速度， 用其他差分相移键控方式调制附加传输数据。 一种用于施加幅度相移键控的装置和方法包括以差分相移键控方式调制第一数据序列的第一调制单元。 第二调制单元以幅度偏移来调制第二数据序列，并将导频信号插入到幅度调制信号中。 乘法器在乘以第一和第二调制单元的输出数据之后输出。 导频信号周期地或非周期地插入在幅度调制信号的子载波的位置。 第一解调单元（31）接收幅度 - 差分相移键控调制信号并用差分相移键控对接收信号进行解调。 第二解调单元（324）从接收到的信号中提取导频信号。
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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：KR1020080050236A
公开(公告)日：2008-06-05
申请号：KR1020070067185
申请日：2007-07-04
Applicant: 한국전자통신연구원 , 부산대학교 산학협력단
IPC: H04J11/00
CPC classification number: H04L27/261 , H03M13/1102 , H03M13/235 , H04L1/004 , H04L5/0048 , H04L27/2626
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: 提供了一种用于OFDM（正交频分复用）系统中的分级调制/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系统中的分级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）。 第一编码器编码作为基本层信号的第一层信号流。 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到编码的第二层信号流。 分级调制部分调制导频信号插入到其上的第二层信号流和编码的第一层信号流，并将编码信号相互组合。
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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：KR101710864B1
公开(公告)日：2017-02-28
申请号：KR1020100130609
申请日：2010-12-20
Applicant: 한국전자통신연구원
IPC: H04N21/236 , H04N21/2365 , H04H60/73 , H04H60/06
Abstract: 본발명은단일송신방송서비스를위한장치를개시한다. 상기단일송신방송서비스를위한장치는, 입력의서브채널들을분석하여서브채널분석정보를출력하고, 각서브채널의스트림을추출하여출력하는입력처리부와, 앙상블, 서비스, 서비스컴포넌트와서브채널을구성하며, 상기입력처리부로부터의서브채널분석정보를이용하여출력앙상블구성에선택된입력의서브채널스트림을출력앙상블의서브채널로구성하고, 상기출력앙상블구성에따라 MCI(multiplex configuration information) 및 SI(service information) 정보, 서브채널구성정보를생성하는다중화관리부와, 상기입력처리부로부터각 서브채널의스트림을수신하고, 상기다중화관리부로부터수신된서브채널구성정보와다중화설정정보(MCI)에따라출력앙상블구성에필요한서브채널스트림을출력하는서브채널관리부와, 상기서브채널관리부로부터수신한서브채널스트림을정해진설정에따라공통인터리브프레임들(Common Interleaved Frame: CIF)로구성하여각 전송프레임에필요한주 서비스채널(Main Service Channel: MSC)을생성하는 MSC 생성부와, 상기다중화관리부(203)로부터수신된 MCI 및 SI 정보에기초하여 FIC(fast information channel)를생성하여출력하는 FIC 생성부와, 상기 FIC 생성부에서생성된 FIC와상기 MSC 생성부에서생성된 MSC로전송프레임을구성하여출력하는전송프레임구성부와, 상기전송프레임구성부로부터전송프레임을수신하고, 전송프레임을위한 DMB 방송신호를생성하여송신하는 DMB 변조부를포함한다..
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