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公开(公告)号：KR1020100059293A
公开(公告)日：2010-06-04
申请号：KR1020080118019
申请日：2008-11-26
IPC: H04N7/08
CPC classification number: H04H20/72 , H04H20/28 , H04H20/30 , H04L1/0041 , H04L1/0059 , H04L1/0065 , H04L27/2627 , H04N7/08 , H04N21/2383 , H04N21/4382
Abstract: PURPOSE: An additional information inserting device and a method thereof in a broadcasting system are provided to maintain compatibility with existing system, thereby inserting additional information which is necessary for a system. CONSTITUTION: A broadcasting signal transmitter(510) transmits a broadcasting signal. A data extraction unit(540) extracts a modulated signal of the broadcasting signal transmitting unit. An additional data configuration unit(530) extracts synchronization of the broadcasting signal from the extracted broadcasting signal. The additional data configuration unit modulates the additional information according to the extracted synchronization. A data composition unit(550) inserts generated additional data to the modulated broadcasting signal.
Abstract translation: 目的：提供广播系统中的附加信息插入装置及其方法，以保持与现有系统的兼容性，从而插入系统所必需的附加信息。 构成：广播信号发送机（510）发送广播信号。 数据提取单元（540）提取广播信号发送单元的调制信号。 附加数据配置单元（530）从所提取的广播信号中提取广播信号的同步。 附加数据配置单元根据所提取的同步来调制附加信息。 数据合成单元（550）将生成的附加数据插入调制广播信号。
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公开(公告)号：KR100879455B1
公开(公告)日：2009-01-19
申请号：KR1020070096001
申请日：2007-09-20
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2614 , H04L27/2628
Abstract: The sequence multiplex transceiving method for reducing the PAPR (Peak-to-Average Power Ratio) is provided to obtain the high PAPR reduction efficiency in case a small amount of dummy sequence is inserted. The input entry sequence is successively inputted. The length information of set up one or more redundant bit is inputted in advance(S210). The length information of the redundant bit is the bit number of the redundant bit. The input entry sequence comprises the length information of the redundant bit. The input entry sequence is transformed to the input data sequence of the parallel configuration(S220). The half repair high speed inverse fourier input data sequence is produced by performing the XOR (Exclucive OR) computing on the transformed input data sequence and redundant bit (S230). The length of the computed redundant bit and length information of the set-up redundant bit are compared (S240). The half repair high speed inverse fourier input data sequence is computed by the half repair high speed inverse fourier(S250). The OFDM signal is generated by changing sequence to the serial type.
Abstract translation: 提供用于降低PAPR（峰均功率比）的序列多路收发方法，以在插入少量虚拟序列的情况下获得高PAPR降低效率。 输入输入序列被连续地输入。 预先输入设定一个以上的冗余位的长度信息（S210）。 冗余位的长度信息是冗余位的位数。 输入输入序列包括冗余位的长度信息。 输入输入序列被变换为并行配置的输入数据序列（S220）。 通过对转换的输入数据序列和冗余位执行XOR（Exclucive OR）计算，产生半修复高速反向傅里叶输入数据序列（S230）。 比较所计算的冗余比特长度和设置冗余比特长度信息（S240）。 半修复高速反向傅里叶输入数据序列由半修复高速反向傅里叶算子计算（S250）。 通过将序列改变为串行类型来生成OFDM信号。
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Patent Agency Ranking
公开(公告)号：KR101868901B1
公开(公告)日：2018-07-23
申请号：KR1020110127471
申请日：2011-12-01
CPC classification number: H04B1/707 , H04H20/30 , H04H60/07 , H04N21/2383 , H04N21/4382 , H04N21/8126
Abstract: 본발명은디지털방송시스템에서기존의방송데이터와역호환성(backward compatibility)을유지하면서추가적으로부가데이터를전송하고수신할수 있는디지털방송시스템에서부가데이터전송및 수신을위한장치및 방법을개시하고있다. 부가데이터전송장치는방송데이터를입력받아 FEC 및변조를수행하여 IF(Intermediate frequency) 대역의방송신호를생성하는 IF 방송신호생성부; 부가데이터를입력받아 DSSS(Direct Sequence Spread Spectrum)를이용하여 IF 대역의부가신호를생성하는 IF 부가신호생성부; 상기 IF 대역의부가신호의평균전력을조절하는평균전력조절부; 상기 IF 대역의방송신호와상기 IF 대역의부가신호를결합하여결합신호를생성하는신호결합부; 상기결합신호를 RF(Radio Frequency) 대역으로상향변환하여 RF 대역의결합신호를생성하는 RF 상향변환부; 및상기 RF 대역의결합신호를전송하는전송부를포함한다. 따라서, 기존디지털방송시스템의어떠한변경없이기존방송신호와역호환성을유지할뿐만아니라, 낮은 SNR(신호대 잡음비) 및다중경로환경에서우수한수신성능을보장할수 있는부가데이터를전송하고수신할수 있다.
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公开(公告)号：KR1020130061257A
公开(公告)日：2013-06-11
申请号：KR1020110127471
申请日：2011-12-01
CPC classification number: H04B1/707 , H04H20/30 , H04H60/07 , H04N21/2383 , H04N21/4382 , H04N21/8126
Abstract: PURPOSE: A device for transmitting and receiving additional data in a digital broadcast system and a method thereof are provided to transmit and receive the additional data which guarantees excellent receiving performance in a low SNR(Signal-to-Noise Ratio) and multi-path environment. CONSTITUTION: An IF(Intermediate Frequency) broadcast signal generation unit(110) generates a broadcast signal of an IF band through FEC(Forward Error Correction) and modulation of input broadcast data. An IF additional signal generation unit(120) generates additional input data as an additional signal of the IF band by using DSSS(Direct Sequence Spread Spectrum). An RF(Radio Frequency) upward conversion unit(150) converts a combination signal of the additional signal and the broadcast signal, which is generated in a signal combination unit(140), into an RF band. A transmission unit(160) transmits the combination signal of the generated RF band. [Reference numerals] (110) IF broadcast signal generation unit; (120) IF additional signal generation unit; (130) Average power control unit; (150) RF upward conversion unit; (160) Transmission unit; (AA) Broadcast data; (BB) Additional data
Abstract translation: 目的：提供一种用于在数字广播系统中发送和接收附加数据的装置及其方法，用于发送和接收保证在低SNR（信噪比）和多径环境中的良好接收性能的附加数据 。 构成：IF（中频）广播信号生成单元（110）通过FEC（前向纠错）生成IF频带的广播信号，并输入广播数据的调制。 IF附加信号生成单元（120）通过使用DSSS（直接序列扩频）生成作为IF频带的附加信号的附加输入数据。 RF（射频）向上转换单元（150）将在信号组合单元（140）中产生的附加信号和广播信号的组合信号转换成RF频带。 发送单元（160）发送所生成的RF频带的组合信号。 （附图标记）（110）IF广播信号生成单元; （120）IF附加信号发生单元; （130）平均功率控制单元; （150）RF向上转换单元; （160）传输单元; （AA）广播资料; （BB）附加数据
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公开(公告)号：KR101276928B1
公开(公告)日：2013-06-19
申请号：KR1020120025445
申请日：2012-03-13
IPC: H04N21/8358
CPC classification number: H04N21/8358 , H04H2201/50
Abstract: PURPOSE: An additional data transmitting/receiving apparatus is provided to compensate distortion in an RF (Radio Frequency) part in case additional information is inserted into a digital broadcast signal. CONSTITUTION: An insertion level control unit (133) determines a level for inserting modulated additional information into a digital TV broadcast signal. An IF (Intermediate Frequency) and RF frequency up-converting unit (140) up-converts the frequency of the additional information into a high frequency band. An IF and RF frequency down-converting unit (141) down-converts the frequency of the additional information into which the digital TV broadcast signal is inserted. A demodulator (160) demodulates the digital TV broadcast signal into which frequency is down-converted. A digital TV broadcast signal removing unit (172) removes a re-modulated digital TV broadcast signal from the digital TV broadcast signal into which the frequency is down-converted. [Reference numerals] (110) IF/RF TV broadcasting signal transmitting unit; (120) Additional information encoding unit; (130) Pre-delay time compensating unit; (131) Digital filter; (132,171) Modulator; (133) Insertion level control unit; (140) IF/RF frequency up-converting unit; (141) IF/RF frequency down-converting unit; (151) RF part; (160,173) Demodulator; (161) Frequency estimating unit; (170) Symbol determining unit; (172) Digital TV broadcast signal removing unit; (180) Time delay estimating unit; (181) Filter calculation unit; (AA) Transmission antenna
Abstract translation: 目的：提供附加的数据发送/接收装置，用于补偿在数字广播信号中插入附加信息的RF（射频）部分中的失真。 构成：插入电平控制单元（133）确定用于将调制的附加信息插入到数字TV广播信号中的电平。 IF（中频）和RF上变频单元（140）将附加信息的频率上变频为高频带。 IF和RF降频转换单元（141）对插入数字TV广播信号的附加信息的频率进行下变频。 解调器（160）对频率下变频的数字电视广播信号进行解调。 数字电视广播信号去除单元（172）从频率下变频的数字TV广播信号中去除再调制的数字TV广播信号。 （110）IF / RF TV广播信号发送单元; （120）附加信息编码单元; （130）预延迟时间补偿单元; （131）数字滤波器; （132,171）调制器; （133）插入电平控制单元; （140）IF / RF上变频单元; （141）IF / RF降频转换单元; （151）射频部分; （160,173）解调器; （161）频率估计单元; （170）符号确定单元; （172）数字电视广播信号去除单元; （180）时间延迟估计单元; （181）过滤器计算单元; （AA）发射天线
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公开(公告)号：KR101172792B1
公开(公告)日：2012-08-20
申请号：KR1020080118019
申请日：2008-11-26
IPC: H04N7/08
CPC classification number: H04H20/72 , H04H20/28 , H04H20/30 , H04L1/0041 , H04L1/0059 , H04L1/0065 , H04L27/2627 , H04N7/08 , H04N21/2383 , H04N21/4382
Abstract: 본발명의일 실시예에따른부가정보삽입장치는, 방송시스템에서부가정보삽입장치에있어서, 방송신호를변조하여전송하기위한방송신호전송부와, 상기방송신호전송부에서변조되어전송되는방송신호를분기하여추출하기위한제 1 데이터추출부와, 상기추출된방송신호로부터방송신호의동기정보를추출하고, 상기추출된동기정보에따라부가정보를변조하며, 상기변조된부가정보의레벨을상기변조된방송신호의신호레벨보다미리결정된값만큼작은레벨로생성하기위한부가데이터구성부와, 상기데이터구성부에서생성된부가정보를상기변조된방송신호에삽입하기위한데이터합성부를포함한다.
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公开(公告)号：KR100821123B1
公开(公告)日：2008-04-14
申请号：KR1020060114417
申请日：2006-11-20
Applicant: 한국전자통신연구원
IPC: H04J11/00
CPC classification number: H04L27/2614 , H04B1/0475 , H04L27/2628
Abstract: An amplitude and phase predistortion apparatus and a predistorting method thereof, and an OFDM transmission system using the same and a transmitting method thereof are provided to minimize the calculation complexity for the system and to reduce a PAPR(Peak-to-Average Power Ratio). An amplitude and phase predistortion apparatus includes a measuring unit(21), a calculating unit(22), and a distorting unit(23). The measuring unit measures the contribution between IFTT multi-carrier and an OFDM symbol made by combining the multi-carriers. The calculating unit calculates a signal size and a phase coefficient to be added to each carrier signal based on the measured contribution. The distorting unit distorts each constellation point with corresponding size and phase using the signal size and the phase coefficient.
Abstract translation: 提供了幅度和相位预失真装置及其预失真方法，以及使用该方法和其发送方法的OFDM传输系统，以最小化系统的计算复杂度并降低PAPR（峰值平均功率比）。 振幅和相位预失真装置包括测量单元（21），计算单元（22）和失真单元（23）。 测量单元测量IFTT多载波与通过组合多载波所产生的OFDM符号之间的贡献。 计算单元基于测量的贡献来计算要添加到每个载波信号的信号大小和相位系数。 畸变单元使用信号大小和相位系数来扭曲具有相应尺寸和相位的每个星座点。
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