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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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45.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：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：KR1020080052352A
公开(公告)日：2008-06-11
申请号：KR1020070101830
申请日：2007-10-10
Applicant: 한국전자통신연구원
IPC: H04L27/04
CPC classification number: H04L1/0009 , H03M13/09 , H03M13/2714 , H03M13/2957 , H03M13/353 , H03M13/6356 , H03M13/6362 , H04L1/0003 , H04L1/0066
Abstract: An adaptive coding modulation system for an effective signal transmission/reception in a satellite communication system, and a method thereof are provided to maintain synchronization and perform efficient transmission by having a physical layer frame of a predetermined length irrespective of a modulation scheme. An adaptive coding modulation system for an effective signal transmission/reception in a satellite communication system includes a mode adaptive unit(101), a stream adaptive unit(102), a turbo coding unit(103), a mapping unit(104), a physical layer framing unit(105), and a modulation unit(106). The mode adaptive unit receives an input stream, and performs input stream synchronization, a null-packet removal, and a coding for error detection. The stream adaptive unit performs a padding and base-band scramble and forms a base-band frame. The turbo coding unit forms a forward error correction frame by applying a turbo coding to the base-band frame. The mapping unit determines a bit mapping based on a state of a transmission channel. The physical layer framing unit forms a physical layer frame by inserting a header and a pilot symbol into the forward error correction frame. The modulation unit performs a modulation for the physical layer frame to transmit the physical layer frame.
Abstract translation: 提供了一种用于卫星通信系统中的有效信号发送/接收的自适应编码调制系统及其方法，用于通过具有预定长度的物理层帧来保持同步并且执行有效的发送，而与调制方案无关。 一种用于卫星通信系统中的有效信号发送/接收的自适应编码调制系统，包括模式自适应单元（101），流自适应单元（102），turbo编码单元（103），映射单元（104）， 物理层成帧单元（105）和调制单元（106）。 模式自适应单元接收输入流，并执行输入流同步，零分组去除和用于错误检测的编码。 流自适应单元执行填充和基带扰频并形成基带帧。 turbo编码单元通过对基带帧应用turbo编码来形成前向纠错帧。 映射单元基于传输信道的状态来确定位映射。 物理层成帧单元通过将头部和导频符号插入前向纠错帧来形成物理层帧。 调制单元对物理层帧进行调制以发送物理层帧。
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公开(公告)号：KR100763598B1
公开(公告)日：2007-10-05
申请号：KR1020060096273
申请日：2006-09-29
Applicant: 한국전자통신연구원
CPC classification number: H04L7/042 , H04L27/2656 , H04L27/2675
Abstract: An apparatus and a method of frame synchronization using phase differential information in a DVB(Digital Video Broadcasting) transmission system are provided to improve the reliability of frame synchronization estimation by performing hard combining for pilot symbol streams in a hot start state. An apparatus of frame synchronization using phase differential information in a DVB transmission system includes a cold start detector(21), a first comparing unit(22), and an acquisition controlling unit(23). The cold start detector(21) calculates a correlation value(a first decision variable) for a received symbol data stream by using the phase differential information with all SOF(Start of Frame) symbol streams for frame synchronization in one SOF symbol period. The first comparing unit(22) compares the first decision variable with a first threshold value. The acquisition controlling unit(23) determines whether the initial frame synchronization is performed, and controls the cold start detector(21) to operate until the initial frame synchronization is performed.
Abstract translation: 提供了一种在DVB（数字视频广播）传输系统中使用相位差信息的帧同步的装置和方法，以通过在热启动状态下对导频符号流执行硬组合来提高帧同步估计的可靠性。 在DVB传输系统中使用相位差信息的帧同步装置包括冷启动检测器（21），第一比较单元（22）和采集控制单元（23）。 冷启动检测器（21）通过在一个SOF符号周期中使用具有用于帧同步的所有SOF（起始帧）符号流的相位差信息来计算接收符号数据流的相关值（第一判定变量）。 第一比较单元（22）将第一判定变量与第一阈值进行比较。 获取控制单元（23）确定是否执行初始帧同步，并且控制冷启动检测器（21）运行直到执行初始帧同步。
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公开(公告)号：KR1020150132931A
公开(公告)日：2015-11-27
申请号：KR1020140059505
申请日：2014-05-19
Applicant: 한국전자통신연구원
CPC classification number: H04L25/03038 , H04L25/03057 , H04L25/0328 , H04L2025/03484 , H04L2025/03636 , H04L2025/03675 , H04L2025/03726
Abstract: 본발명은 VCM(Variable Coding and Modulation) 또는 ACM(Adaptive Coding and Modulation) 환경의위성방송이나통신을위한위성서비스에서프레임동기및 MODCOD(Modulation Code rate) 검출이필요한 MMSE(minimum-mean square error) 등화기의적용을위하여왜곡이나인접심볼간섭을제거개선함으로써, 대역폭당위성신호의송수신주파수효율, 또는대역폭당전송효율(Spectral Efficiency, S.E)을개선할수 있는통신장치및 방법에관한것이다.
Abstract translation: 本发明涉及通过去除和减轻失真或连续符号干扰来提高卫星信号每频带或频谱效率（SE）的收发频率效率的通信装置和方法，以应用最小均方误差（MMSE ）均衡器，其需要在可变编码和调制（VCM）或自适应编码和调制（ACM）环境或用于通信的卫星服务的卫星广播中的帧同步和检测调制码率（MODCOD）。
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