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公开(公告)号：KR101391398B1
公开(公告)日：2014-05-02
申请号：KR1020090127729
申请日：2009-12-21
Applicant: 한국전자통신연구원
CPC classification number: H04B7/18576 , H04L27/2657
Abstract: 본발명은 DVB-RCS(Digital Video Broadcasting - Return Channel via Satellite) 시스템의송신방법, 수신방법, 송신장치및 수신장치에관한것으로, 일면에따른송신방법은, 다수의파일럿심볼을분산배치하여버스트를구성하는단계및 버스트를전송하는단계를포함한다.
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公开(公告)号：KR1020140038287A
公开(公告)日：2014-03-28
申请号：KR1020130018363
申请日：2013-02-21
Applicant: 한국전자통신연구원
CPC classification number: H04B7/185 , H03M13/1165 , H04B1/38 , H04B14/002 , H04L27/18 , H04W84/06
Abstract: The present invention relates to an apparatus and a method of transmitting and receiving based on a DVB-S2 standard which is operational in an environment of a low signal-to-noise ratio. The present invention comprises: a transmitter of the DVB-S2 standard base; a mapping unit to determine a bit mapping based on at least one among the area to be applied and the state of transmission channel; and a physical layer frame iteration unit repeating a physical layer frame where a physical layer header is inserted as a spreading factor.
Abstract translation: 本发明涉及一种基于DVB-S2标准的发送和接收的装置和方法，DVB-S2标准在低信噪比的环境中工作。 本发明包括：DVB-S2标准基站的发射机; 映射单元，用于基于要应用的区域和传输信道的状态中的至少一个来确定位映射; 以及物理层帧迭代单元，其重复将物理层报头插入作为扩展因子的物理层帧。
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公开(公告)号：KR101200493B1
公开(公告)日：2012-11-12
申请号：KR1020100101988
申请日：2010-10-19
Applicant: 한국전자통신연구원
Abstract: 입력된 통신방송 융합(triple play) IP 데이터를 인터넷 및 TV 데이터와 음성(VoIP) 데이터로 나누어, 긴 지연시간을 허용하는 인터넷 및 TV 데이터는 기존의 DVB-S2 규격으로 부호화하고, 짧은 지연시간만을 허용하는 음성 데이터는 DVB-RCS +M 규격 기반의 4K 모드로 부호화한다. 부호화된 데이터는 각각 직교 변조되고, 직교 변조된 음성 데이터는 확산 계수(spreading factor)에 따라 직접수열 기반으로 대역 확산된다. 대역 확산된 신호는 SCPC(FDMA: frequency division multiple access) 형태로 각 사용자별로 할당된 주파수와 중첩되도록 다중화된다.
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公开(公告)号：KR1020120072026A
公开(公告)日：2012-07-03
申请号：KR1020100133788
申请日：2010-12-23
Applicant: 한국전자통신연구원
CPC classification number: H04H40/90
Abstract: PURPOSE: A frame synchronization apparatus in a satellite communication system and method thereof are provided to calculate a correlation between an input signal for synchronizing a frame at a reception end of a satellite communication system and a signal sequence of the reception end without using a multiplier factor. CONSTITUTION: A correlation unit(110) acquires a correlation value between the unique word of a receiver and a symbol data string of a frame received from a transmission end of a satellite communication system. A comparison unit(130) compares the correlation values and the pre-established threshold values. A determination unit(150) determines whether the frame is synchronized according to a comparison result of the comparison unit.
Abstract translation: 目的：提供一种卫星通信系统中的帧同步装置及其方法，用于计算用于在卫星通信系统的接收端同步帧的输入信号与接收端的信号序列之间的相关性，而不使用乘数 。 构成：相关单元（110）获取接收机的唯一字与从卫星通信系统的发送端接收到的帧的符号数据串之间的相关值。 比较单元（130）比较相关值和预先建立的阈值。 确定单元（150）根据比较单元的比较结果确定帧是否同步。
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35.发明公开위성 시스템의 리턴 링크에서의 신호 복조방법 및 그 복조장치, 리턴 링크에서의 신호 변조방법 및 그 변조 장치 无效卫星系统返回链路解调方法及装置的方法，卫星系统返回链路调制方法及其装置
公开(公告)号：KR1020120065130A
公开(公告)日：2012-06-20
申请号：KR1020100126476
申请日：2010-12-10
Applicant: 한국전자통신연구원
CPC classification number: H04B7/2125 , H04B7/18589 , H04L7/04 , H04L2027/0024 , H04L2027/0067 , H04L2027/0079 , H04L2027/0095
Abstract: PURPOSE: A method for demodulating signals in a return link of a satellite system and a demodulating apparatus thereof and a method for modulating signals in the return link and a modulating apparatus thereof are provided to check a symbol of a burst signal in a reception terminal by modulating the burst signal in a transmission terminal of a return link in a satellite system. CONSTITUTION: The symbol timing of burst, which is received through a return link of a satellite system, is estimated. The estimated symbol timing of the received burst is synchronized by reference symbol timing(110). An Oerder & Myer algorithm of a non data-aided method is used to estimate a symbol timing error. A location of timing synchronous burst is synchronized to a reference burst location(150) by using a preamble symbol and a postamble symbol of the timing synchronous burst synchronized by symbol timing(130). A carrier wave of the location synchronous burst is recovered by using a pilot symbol of the location synchronous burst synchronized to the reference burst location.
Abstract translation: 目的：一种用于解调卫星系统的返回链路中的信号的方法及其解调装置，以及用于调制返回链路中的信号的方法及其调制装置，用于通过以下方式检查接收终端中的突发信号的符号： 调制卫星系统中的返回链路的发送终端中的脉冲串信号。 构成：通过卫星系统的返回链路接收的突发符号定时被估计。 接收脉冲串的估计符号定时由参考符号定时（110）同步。 使用非数据辅助方法的Oerder和Myer算法来估计符号定时误差。 定时同步突发的位置通过使用由符号定时（130）同步的定时同步脉冲串的前导码符号和后同步符号同步到参考突发位置（150）。 通过使用与参考突发位置同步的位置同步突发的导频符号来恢复位置同步突发的载波。
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Patent Agency Ranking
公开(公告)号：KR101151195B1
公开(公告)日：2012-06-08
申请号：KR1020080114739
申请日：2008-11-18
Applicant: 한국전자통신연구원 , 서강대학교산학협력단
CPC classification number: H04L27/2656 , H04L7/042 , H04L27/2676
Abstract: 강건한동기획득을위한상관장치및 방법을개시한다. 강건한동기획득을위한상관방법은수신심볼에대한수신심볼위상차를구하는단계와, 상관심볼에대한상관심볼위상차를구하는단계와, 수신심볼위상차와상관심볼위상차를이용하여수신심볼의차등상관값을구하는단계와, 수신심볼위상차를이용하여수신심볼의유클리드거리값을구하는단계와, 차등상관값과유클리드거리값을이용하여수신심볼의합 상관값을구하는단계를포함한다.
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公开(公告)号：KR101142203B1
公开(公告)日：2012-05-07
申请号：KR1020080117066
申请日：2008-11-24
Applicant: 한국전자통신연구원
IPC: H04N7/015
CPC classification number: H04L27/2655 , H04L27/2656 , H04L27/2657 , H04L27/2662
Abstract: 위성 방송 프레임 신호를 복조하는 방법이 개시된다. 본 발명에 따른 DVB-S2(Digital Video Broadcasting - via Satellite, Second Generation) 규격의 위성 방송 프레임 신호를 복조하는 복조기의 복조 방법은, 심볼 타이밍을 동기화하는 단계; 심볼 타이밍 동기 후 프레임을 동기화하는 단계; 프레임 동기화 후 반송파를 복원하는 단계; 및 반송파 복원 완료 후 모드코드(MODCOD) 정보를 복호하여 프레임 구성 정보를 획득하는 단계;를 포함한다. 이에 의해 고속 복조 및 복조 데이터의 신뢰성이 확보된다.
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公开(公告)号：KR1020100120094A
公开(公告)日：2010-11-12
申请号：KR1020100042010
申请日：2010-05-04
Applicant: 한국전자통신연구원
Inventor： 김판수 , 장대익 , 이호진 , 쵸니,스테파노 , 바넬리-코랄리,알렉산드로 , 꼬라짜,지오반니엠마누엘
CPC classification number: H04L1/0057 , H04B7/18528 , H04L1/0071 , H04L1/009 , H04L1/0625 , H04L27/2003
Abstract: PURPOSE: A method and an apparatus for transmitting/receiving data by using a satellite channel are provided to use low cost analog device in a terminal by providing excellent transmission performance under a weak communication environment. CONSTITUTION: When receiving bit data, the encoding unit performs channel encoding through an e-BCH(extend BCH) code. An interleaver(103) interleaves the encoded data through the encoding unit. A modulation unit(105) modulates interleaved data through a CPM(Continuous Phase Modulation) method which use 4 symbols, and a transmission unit(107) transmits the modulated data to a primary center.
Abstract translation: 目的：提供一种通过使用卫星信道发送/接收数据的方法和装置，通过在弱通信环境下提供优异的传输性能，在终端中使用低成本的模拟设备。 构成：当接收到位数据时，编码单元通过e-BCH（扩展BCH）码进行信道编码。 交织器（103）通过编码单元对编码数据进行交织。 调制单元（105）通过使用4个符号的CPM（Continuous Phase Modulation，连续相位调制）方法来调制交织数据，并且发送单元（107）将调制数据发送到主要中心。
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公开(公告)号：KR1020100055855A
公开(公告)日：2010-05-27
申请号：KR1020080114739
申请日：2008-11-18
Applicant: 한국전자통신연구원 , 서강대학교산학협력단
CPC classification number: H04L27/2656 , H04L7/042 , H04L27/2676
Abstract: PURPOSE: A correlation apparatus for the strong synchronous acquisition and method uses the distance value about the receiving symbol. The frequency error can be over gotten. CONSTITUTION: The receiving symbol phase difference calculation unit(201) obtains the receiving symbol phase difference between the delay receiving symbol delaying the receiving symbol and the receiving symbol. The correlation symbol phase difference calculation unit(203) obtains the correlation symbol phase difference between the lag correlation symbol delaying the correlation symbol and the correlation symbol. The gradation correlator(205) uses the receiving symbol phase difference and correlation symbol phase difference.
Abstract translation: 目的：强同步采集和方法的相关设备使用关于接收符号的距离值。 频率误差可以超过。 构成：接收符号相位差计算单元（201）获得延迟接收符号延迟接收符号和接收符号之间的接收符号相位差。 相关符号相位差计算单元（203）获得延迟相关符号和相关符号的滞后相关符号之间的相关符号相位差。 灰度相关器（205）使用接收符号相位差和相关符号相位差。
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公开(公告)号：KR1020090063048A
公开(公告)日：2009-06-17
申请号：KR1020080025903
申请日：2008-03-20
Applicant: 한국전자통신연구원 , 서강대학교산학협력단
Abstract: An apparatus and a method for selecting a correlation mode based on a frequency error of a carrier are provided to obtain initial synchronization by selecting the correlation mode according to the corresponding region after calculating a frequency error boundary point between correlation modes. Non-detection probability values are calculated according to a frequency offset normalized in each correlation method(201). A point meeting graphs of non-detection probability values is determined to a frequency error boundary point(202). A correlation mode is selected based on the determined frequency error boundary point(203).
Abstract translation: 提供一种用于基于载波的频率误差来选择相关模式的装置和方法，以通过在相关模式之后计算频率误差边界点之后根据相应区域选择相关模式来获得初始同步。 根据在每个相关方法（201）中归一化的频率偏移来计算非检测概率值。 满足非检测概率值的图的点被确定为频率误差边界点（202）。 基于确定的频率误差边界点（203）选择相关模式。
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