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公开(公告)号：KR1020100093393A
公开(公告)日：2010-08-25
申请号：KR1020090012548
申请日：2009-02-16
Applicant: 한국전자통신연구원
CPC classification number: H04B7/15571 , H04B7/15585 , H04B15/02
Abstract: PURPOSE: An on channel relay device and a method thereof are provided to have more superior properties of output signals than properties of input signals. CONSTITUTION: An RF(Radio Frequency) transmission characteristic modeling and reflecting unit(909) models a RF transmission characteristic of an on channel relay device. The RF transmission characteristic modeling and reflecting unit reflects the modeled RF transmission characteristic to a signal in which a relay signal is branched in an output terminal. A feedback signal replica generating unit(910) generates a replica of a feedback signal based on the signal to which the RF transmission characteristic is reflected and an output signal from a subtractor. The feedback signal replica generating unit feeds back the generated replica to the subtractor.
Abstract translation: 目的：提供一个通道继电器及其方法，具有比输入信号特性更优越的输出信号特性。 构成：射频（射频）传输特性建模和反射单元（909）对通道中继设备的射频传输特性进行建模。 RF传输特性建模和反射单元将建模的RF传输特性反映到在输出端子中继电器信号被分支的信号。 反馈信号副本生成单元（910）基于反射RF传输特性的信号和来自减法器的输出信号产生反馈信号的副本。 反馈信号副本生成单元将生成的副本反馈到减法器。
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公开(公告)号：KR100967399B1
公开(公告)日：2010-07-02
申请号：KR1020070082658
申请日：2007-08-17
Applicant: 한국전자통신연구원
IPC: H04N7/015
CPC classification number: H04L25/03343 , H04H20/72 , H04L2025/03382
Abstract: 본 발명은 지상파 디지털 방송 시스템에서 VSB(Vestigial Side Band) 송신기 및 중계기에서 채널 필터 출력에서 커플링한 신호를 VSB 복조기로 전달하는 역방향 경로에서 발생하는 전송 대역 내 크기 및 위상 왜곡을 톤 신호를 이용해 추정하여 역방향 경로를 보상해 줌으로써, 전치 등화기의 성능을 개선하기 위한 톤 신호 발생을 이용한 역방향 경로 보상 장치 및 그 방법에 관한 것으로, 등화기의 필터계수를 적응적으로 생성하기 위해 역방향 경로를 갖는 디지털 방송 시스템의 송신단에서, 상기 등화기의 성능을 향상시키기 위한 장치에 있어서, 기준 무선 주파수 신호를 발생하는 기준 신호 발생수단; 상기 기준 신호 발생수단에 의해 발생된 기준 무선 주파수 신호를 근거로 상기 역방향 경로에 대한 전송 대역 특성 정보를 추정하는 역방향 경로 추정수단; 및 상기 역방향 경로 추정수단에 의해 추정된 역방향 경로에 대한 전송 대역 특성 정보를 바탕으로 상기 역방향 경로를 통해 전달된 복조 신호를 보상하여, 상기 등화기의 필터 계수를 생성하는 필터 계수 생성기로 전달하는 역방향 경로 보상수단을 포함한다.
지상파, 디지털, 방송, 송신, 전치 등화기, 채널 필터, 역방향, 경로, 보상-
公开(公告)号：KR100964396B1
公开(公告)日：2010-06-17
申请号：KR1020080052491
申请日：2008-06-04
Applicant: 한국전자통신연구원 , 성균관대학교산학협력단
CPC classification number: H04J13/00 , H04L25/0206 , H04L25/0212 , H04L25/022 , H04L25/0228 , H04L25/03159 , H04L25/03292 , H04L27/2602 , H04L27/2607 , H04L27/2613 , H04L27/265 , H04L2025/03414
Abstract: 본 발명은 채널 추정, 등화 방법 및 시스템에 관한 것이다.
본 발명은 시간 영역의 파일럿 신호를 보호 구간에 삽입하고, 주파수 영역의 경판정 신호를 이용하여 채널의 주파수 응답을 추정한다. 그리고 추정된 채널 값을 통해 무선 채널 왜곡을 등화한다. 따라서, 고속 이동체 속도 환경에서의 성능 향상이 두드러지며, 시간영역 파일럿 신호를 이용한 채널 추정과 연동할 경우, 적은 반복 횟수로도 최대 성능을 발휘할 수 있다.
OFDM(Orthogonal Frequency Division Multiplexing), 채널 추정, 등화, 파일럿, 시퀀스, CAZAC(Constant Amplitude Zero Autocorrelation Code)-
公开(公告)号：KR100930718B1
公开(公告)日：2009-12-09
申请号：KR1020070108349
申请日：2007-10-26
Applicant: 한국전자통신연구원
Abstract: In a digital broadcasting signal transmission system, a transmission frame includes a frame body and a frame header, and the frame body is divided into a plurality of sub-bands in the frequency domain and is divided into a plurality of symbols in the time domain. The frame header is provided in the former part of the transmission frame and is transmitted with a signal in the time domain. The frame body includes a plurality of services, and the services respectively receive at least one sub-band and at least one symbol. The frame header includes information on the plurality of services, and information on the plurality of services includes information on the sub-band and the symbol to which the services are allocated, information on channel encoding levels of the services, and information on digital modulation levels of the services.
Abstract translation: 在数字广播信号传输系统中，传输帧包括帧体和帧头，并且帧体在频域中被分成多个子带，并在时域中被分成多个符号。 帧头被提供在传输帧的前面部分中，并且在时域中与信号一起传输。 帧体包括多个服务，并且这些服务分别接收至少一个子带和至少一个符号。 帧头包括关于多个服务的信息，并且关于多个服务的信息包括关于分配了服务的子带和符号的信息，关于服务的信道编码电平的信息以及关于数字调制电平的信息 的服务。
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公开(公告)号：KR1020090096399A
公开(公告)日：2009-09-10
申请号：KR1020090078805
申请日：2009-08-25
Applicant: 한국전자통신연구원
CPC classification number: H04H20/42 , H04H20/72 , H04H40/18 , H04H60/07 , H04L1/0003 , H04L1/0017 , H04L1/0041 , H04L1/0065 , H04L1/0071 , H04L1/04 , H04L2001/0093 , H04L2001/0098 , H04N21/2343 , H04N21/234327 , H04L1/0023
Abstract: A transmitting method, a transmitting apparatus, a receiving method and a receiving apparatus of a digital broadcasting signal are provided to divide a stream into a plurality of layers according to a characteristic of the stream, process each layer independently and dynamically allocate a frequency based on the processed signal. A single stream is divided by a predetermined stream unit. Importance of the divided stream unit is grasped. According to the grasped importance, the divided stream unit is allocated to a plurality of layers(S104). Encoding and mapping about a separate layer are performed(S105,S106). Resources about the separate layer are dynamically allocated based on a symbol number about the separate layer(S107,S108).
Abstract translation: 提供一种数字广播信号的发送方法，发送装置，接收方法和接收装置，以根据流的特性将流划分成多个层，独立地处理每一层，并基于 处理后的信号。 单个流被预定的流单元划分。 掌握分流单元的重要性。 根据所掌握的重要性，将划分的流单元分配给多个层（S104）。 执行关于单独层的编码和映射（S105，S106）。 关于单独层的资源基于关于单独层的符号数量动态地分配（S107，S108）。
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Patent Agency Ranking
公开(公告)号：KR1020090037268A
公开(公告)日：2009-04-15
申请号：KR1020070109608
申请日：2007-10-30
Applicant: 한국전자통신연구원 , 부산대학교 산학협력단
CPC classification number: H04B7/15585
Abstract: On-channel repeaters with feedback cancellation based on partitioning of pilots and a method thereof are provided to be capable of removing feedback signals based on pilot partitioning and a method thereof, which can quickly cope with a rapid change of a feedback channel and thus efficiently remove a feedback signal by reducing an update interval of a filter coefficient, i.e., increasing the number of times of filter-coefficient creation through pilot partitioning. An on-channel repeater capable of removing feedback signals based on pilot partitioning includes an Rx antenna(901), an RF receiver(902), a sub tractor(903), an RF transmitter(907), a Tx antennal(908), and a replica creator(909). The replica creator creates a filter coefficient through pilot partitioning, creates a replica of a feedback signal by using the created filter coefficient, and feeds back the created replica to the subtractor. An RF signal received via the Rx antenna from a main transmitter or another repeater is down-converted into a signal of a predetermined band by the RF receiver. The subtractor subtracts a replica of a feedback signal from the down- converted signal of the predetermined band, thereby removing the feedback signal. The replica creator creates a filter coefficient through pilot partitioning, creates a replica of the feedback signal by using the created filter coefficient, and feeds back the created replica to the subtractor. The RF transmitter converts an output signal from the subtractor into an RF signal, and transmits the RF signal via the Tx antenna by radio. The replica creator includes an adaptive filter(904), a filter coefficient creator(905), and a partitioned-pilot storage(906) for storing a partitioned pilot to be used at the filter coefficient creator.
Abstract translation: 提供了基于导频分割的反馈消除的通道中继器及其方法，其能够基于导频分区及其方法去除反馈信号，其可以快速应对反馈信道的快速变化，从而有效地去除 通过减少滤波器系数的更新间隔，即通过导频分割增加滤波器系数创建的次数来提供反馈信号。 能够基于导频分割去除反馈信号的同频中继器包括Rx天线（901），RF接收机（902），子牵引器（903），RF发射机（907），Tx天线（908）， 和复制品创建者（909）。 副本创建者通过导频分区创建滤波器系数，通过使用创建的滤波器系数创建反馈信号的副本，并将创建的副本反馈到减法器。 通过Rx天线从主发射机或另一中继器接收的RF信号被RF接收机下变频成预定频带的信号。 减法器从预定频带的下变频信号中减去反馈信号的副本，从而消除反馈信号。 副本创建者通过导频分区创建滤波器系数，通过使用创建的滤波器系数创建反馈信号的副本，并将创建的副本反馈到减法器。 RF发送器将来自减法器的输出信号转换为RF信号，并通过无线电通过Tx天线发送RF信号。 复制品创建器包括自适应滤波器（904），滤波器系数创建器（905）和用于存储要在滤波器系数创建器处使用的分区导频的分区导频存储器（906）。
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公开(公告)号：KR1020090025575A
公开(公告)日：2009-03-11
申请号：KR1020070090534
申请日：2007-09-06
Applicant: 한국전자통신연구원
Abstract: An identification signal analyzing apparatus for compensating separation and attenuation of a channel profile and a method thereof are provided to more accurately analyze an identification signal. An identification signal generating unit(404) produces the same identification signal as an identification signal inserted by a transmission side apparatus. A partial correlation unit(405) calculates a correlation value between a receiving signal to/in which a promised identification signal is inserted/received by a transmission side apparatus and the identification signal generated by the identification signal generating unit through a partial correlation method. A correlation value compensation unit(406) compensates for separation and attenuation of the correlation value calculated with the partial correlation unit. A channel profile extracting unit(407) extracts a channel profile from the correlation value compensated by the correlation value compensation unit.
Abstract translation: 提供用于补偿信道简档的分离和衰减的识别信号分析装置及其方法，以更准确地分析识别信号。 识别信号生成单元（404）产生与由发送侧装置插入的识别信号相同的识别信号。 部分相关单元（405）通过部分相关方法计算由发送方装置插入/接收的承诺识别信号的接收信号与由识别信号生成单元生成的识别信号之间的相关值。 相关值补偿单元（406）补偿由部分相关单元计算的相关值的分离和衰减。 信道简档提取单元（407）从由相关值补偿单元补偿的相关值中提取信道分布。
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公开(公告)号：KR1020090009410A
公开(公告)日：2009-01-23
申请号：KR1020070072636
申请日：2007-07-20
Applicant: 한국전자통신연구원
CPC classification number: H04B7/15585 , H04B1/525
Abstract: An identical channel relay apparatus and a method thereof for relaying output signal the same as input signal to the identical channel are provided to correct the channel distortion of the received signal by estimating the reverse of the receive channel from the signal removing feedback. A subtracting unit(803) subtracts replica of feedback signal from a converted signal by an RF receiver(802). A replica generating unit(804) produces the replica of feedback based on the signal which is downward transformed into the prescribed band by a down-converter(808) and the signal outputted from the subtracting unit. A reverse channel estimating unit(805) generates filter tap coefficient by estimating the reverse of the received channel. A first adaptive filtering unit(806) performs filtering by using the filter tap coefficient generated by the reverse channel estimating unit.
Abstract translation: 提供了相同的信道中继装置及其将与输入信号相同的输出信号中继到相同信道的方法，以通过从信号去除反馈估计接收信道的反向来校正接收信号的信道失真。 减法单元（803）通过RF接收器（802）从转换的信号中减去反馈信号的副本。 复制产生单元（804）基于通过下变频器（808）向下变换为规定频带的信号和从减法单元输出的信号产生反馈副本。 反向信道估计单元（805）通过估计接收信道的反向来产生滤波器抽头系数。 第一自适应滤波单元（806）通过使用由反向信道估计单元生成的滤波器抽头系数来执行滤波。
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公开(公告)号：KR1020080106061A
公开(公告)日：2008-12-04
申请号：KR1020080050263
申请日：2008-05-29
Applicant: 한국전자통신연구원
IPC: H04N21/236 , H04N21/434
CPC classification number: H04N21/23614 , H04N21/234309 , H04N21/23439 , H04N21/2365 , H04N21/2381 , H04N21/2383 , H04N21/242 , H04N21/4122 , H04N21/4126 , H04N21/41407 , H04N21/4347 , H04N21/4382 , H04N21/64315
Abstract: A transmission method, a transmitting device, a receiving method, a receiving device and a transmission frame structure of the digital broadcasting signal are provided to support various transmission modes in digital satellite broadcasting(DTV or DMB). A stream offering unit(100) converts a plurality of program service configuration elements into stream. A multiplexer(200) modulates the stream into the mode determined according to the transmission mode. A transmission frame generating unit(300) generates a transfer frame based on multiplexed information and stream information allocated to each sub channel according to the transmission mode. A frame header includes the transfer frame. A frame body includes data information about the service.
Abstract translation: 提供数字广播信号的发送方法，发送装置，接收方法，接收装置和发送帧结构，以支持数字卫星广播（DTV或DMB）中的各种传输模式。 流提供单元（100）将多个节目服务配置元素转换成流。 多路复用器（200）将流调制成根据传输模式确定的模式。 传输帧生成单元（300）根据传输模式，根据复用的信息和分配给每个子信道的流信息生成传送帧。 帧头包括传送帧。 帧体包括有关该服务的数据信息。
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公开(公告)号：KR1020080099553A
公开(公告)日：2008-11-13
申请号：KR1020070045235
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 increase the use efficiency of restricted frequency resources. Co-channel relaying equipment comprises the followings: a receiving means(802) receiving radio frequency signals; a subtraction means(803) subtracting the replica of a feedback signal from the signal received by the receiving means; a replica generation means(804) which produces a replica based on the signal subtracted by the subtraction means and feeds the replica back to the subtraction means; a reverse channel estimation means(805) which generates a filter tap coefficient by estimating the inverse of a reception channel based on the subtracted signal; the first adaptive filtering means(806) which compensates for the channel distortion of the subtracted signal by using the filter tap coefficient generated by the reverse channel estimation means; and a transmitting means(807) which converts the signal in which the channel distortion is compensated into a radio frequency signal, and then wirelessly transmit the converted signal.
Abstract translation: 提供同频中继设备及其方法，以提高受限频率资源的使用效率。 同频中继设备包括：接收射频信号的接收装置（802）; 减法装置，从接收装置接收的信号中减去反馈信号的副本; 复制产生装置（804），其基于由减法装置减去的信号产生副本，并将副本送回减法装置; 反向信道估计装置，用于通过基于所述减去的信号估计接收信道的反向产生滤波器抽头系数; 第一自适应滤波装置（806），其通过使用由反向信道估计装置产生的滤波器抽头系数来补偿减去的信号的信道失真; 以及发送装置（807），其将信道失真补偿的信号转换成射频信号，然后无线地发送转换后的信号。
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