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公开(公告)号：KR1020090064268A
公开(公告)日：2009-06-18
申请号：KR1020080043579
申请日：2008-05-09
Applicant: 한국전자통신연구원
IPC: H03M13/11
CPC classification number: H03M13/112 , H03M13/1165 , H03M13/658 , H03M13/6583
Abstract: A decoding apparatus and a decoding device are provided to obtain the optimum decoding performance in a low code rate by performing the decoding by using a variable correction value every iteration decoding in a check node update process. An initial normalizing constant and a normalizing constant correction value are set up(301). A check node is initially updated by using an initial normalizing constant(302). When updating the check node again, the update is performed by using the variable correction value adding the normalizing constant correction value to the initial normalizing constant(303). The update is performed by adding the normalizing constant correction value to the variable correction value applied to the prior update every an additional update(304).
Abstract translation: 提供一种解码装置和解码装置，通过在校验节点更新处理中通过每次迭代解码使用可变校正值进行解码，以低码率获得最佳解码性能。 建立初始归一化常数和归一化常数校正值（301）。 最初通过使用初始归一化常数（302）更新校验节点。 当再次更新校验节点时，通过使用将归一化常数校正值加到初始归一化常数（303）的可变校正值来执行更新。 通过将归一化常数校正值添加到每个附加更新应用于先前更新的可变校正值来执行更新（304）。
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公开(公告)号：KR100853203B1
公开(公告)日：2008-08-20
申请号：KR1020070049956
申请日：2007-05-22
Applicant: 한국전자통신연구원
IPC: H04N21/236 , H04N7/015 , H04L27/34
Abstract: 디지털 방송 송수신장치 및 방법이 개시된다. 이 송신장치는 제1디지털방송데이터를 제1부호화하는 부호화부, 제2디지털방송데이터를 제2부호화하는 부호화부, 제1부호화된 신호를 높은 순위로 설정하고 제2부호화된 신호를 낮은 순위로 설정하여 IQ 신호로 계층적 매핑하는 계층적 매핑부, 계층적 매핑된 IQ 신호를 고차변조 방식으로 직교변조하는 변조부를 포함함으로써, 종래의 디지털 방송 수신장치와 호환가능한 상태에서 전송용량을 증가시켜서 방송 채널 개수를 증가시키거나 새로운 서비스를 제공하는 효과를 얻을 수 있다.
계층적 매핑, 고차변조, 16APSK, LDPC, LLR-
公开(公告)号：KR1020080050927A
公开(公告)日：2008-06-10
申请号：KR1020070019617
申请日：2007-02-27
Applicant: 한국전자통신연구원
CPC classification number: H04L7/0033 , H04B7/1851 , H04B7/2125 , H04L7/027
Abstract: A timing synchronization method in an interactive satellite telecommunication system is provided to compensate for a time delay by using a time delay compensation value, when data is transmitted to a terminal in a coverage area. An interactive satellite telecommunication system based on TDMA(Time Division Multiplexing Access) includes a satellite(11), an outer gap filler(10), an inner gap filler(12), and a set top box(13). The satellite transmits Ku/Ka band signals to a ground terminal and receives the Ku/Ka band signal from the gap filler and the terminal. The inner gap filler converts the Ku/Ka band signal to an S band signal and delivers the converted signal to the set top box. The inner gap filler receives the S band signal from the set top box and converts the S band signal to the Ku/Ka band signal. The gap filler in a tunnel stores time delay values according to positions and compensates for a time delay by using the time delay compensation value, when data is transmitted from the satellite to the set top box. The set top box transmits and receives the Ku/Ka range signal with the satellite, and transmits and receives the S band signal with the gap filler.
Abstract translation: 提供交互式卫星电信系统中的定时同步方法，当数据被发送到覆盖区域中的终端时，通过使用时间延迟补偿值来补偿时间延迟。 基于TDMA（时分复用接入）的交互式卫星电信系统包括卫星（11），外部间隙填充物（10），内部间隙填充物（12）和机顶盒（13）。 卫星将Ku / Ka频带信号发送到接地端子，并从间隙填充器和终端接收Ku / Ka频带信号。 内部间隙填充将Ku / Ka频带信号转换为S频带信号，并将转换的信号传送到机顶盒。 内隙填料从机顶盒接收S波段信号，并将S波段信号转换为Ku / Ka波段信号。 隧道中的间隙填充器根据位置存储时间延迟值，并且当数据从卫星发送到机顶盒时，通过使用时间延迟补偿值来补偿时间延迟。 机顶盒与卫星发送和接收Ku / Ka范围信号，并用间隙填充发送和接收S波段信号。
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公开(公告)号：KR1020080030331A
公开(公告)日：2008-04-04
申请号：KR1020060096276
申请日：2006-09-29
Applicant: 한국전자통신연구원
IPC: H04L12/869 , H04W72/12 , H04W84/06
CPC classification number: H04L1/0017 , H04B7/18584 , H04H20/72 , H04H60/06 , H04L1/0003 , H04L1/0009 , H04N21/238 , H04N21/23805 , H04N21/26208 , H04N21/44209 , H04N21/6143 , H04N21/6582
Abstract: A hierarchical channel adaptive packet scheduler in a satellite communication network and a method thereof are provided to maintain the amount of transmitted packets equally even though weather conditions of regions where each receiving device is positioned are different, and to support various service classes for each receiving device at the same time, thereby realizing optimized scheduling for different service classes. At least one multi-stage class queue(50) queues packets to be transmitted, while having different service levels of service classes. At least one regional queue(60) queues packets to be transmitted to each region having different weather conditions. A queue controller(70) transmits the packets stored in the regional queues and the class queues to receiving device sides according to previously determined packet scheduling policies.
Abstract translation: 提供卫星通信网络中的分级信道自适应分组调度器及其方法，以便即使每个接收设备所在的区域的天气条件不同，也可以平均地维持传输分组的数量，并且为每个接收设备支持各种服务等级 同时实现了针对不同业务类的优化调度。 至少一个多级类队列（50）将要发送的数据包排队，同时具有不同的服务级别的服务级别。 至少一个区域队列（60）将要发送的分组排队到具有不同天气条件的每个区域。 队列控制器（70）根据先前确定的分组调度策略将存储在区域队列和类队列中的分组发送到接收设备侧。
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公开(公告)号：KR100799538B1
公开(公告)日：2008-01-31
申请号：KR1020060083169
申请日：2006-08-30
Applicant: 한국전자통신연구원
IPC: H04N21/235 , H04N21/43
Abstract: 1. 청구범위에 기재된 발명이 속한 기술분야
본 발명은 DVB-S2 기반 양방향 위성통신 시스템에서의 방송 및 통신 데이터 송/수신장치에 관한 것임.
2. 발명이 해결하려고 하는 기술적 과제
본 발명은 IP 패킷을 MPE/MPEG-TS 방식을 사용하지 않고 IP 패킷을 직접 전송(비캡슐화 전송)함으로써, 데이터 전송 효율을 극대화시킴과 동시에, 단말국에서는 기존의 방송 데이터 수신 방식을 이용해서 고속으로 통신 데이터를 처리하기 위한, DVB-S2 기반 양방향 위성통신 시스템에서의 방송 및 통신 데이터 송/수신장치를 제공하는데 그 목적이 있음.
3. 발명의 해결방법의 요지
본 발명은, 양방향 위성통신 시스템에서의 방송 및 통신 데이터 송신장치(이하, '송신장치'라 함)에 있어서, 입력되는 데이터의 주파수를 상향 또는 하향 변환하는 중심국 RF 처리수단을 통해 수신된 각 단말국 채널 수신 상태 정보(SNR) 및 역방향링크 트래픽 데이터를 복조 및 채널 디코딩하기 위한 역방향링크 복조수단; 외부 인터넷과 연동되어 IP 패킷 기반의 통신 데이터를 송/수신하기 위한 중심국 연결수단; MPEG-TS 패킷 형태의 방송 데이터를 생성하기 위한 방송 데이터 생성수단; 및 MPEG-TS 패킷 형태의 방송 데이터와 IP 패킷 기반의 통신 데이터를 동시에 다수의 전송방식을 사용하여 베이스밴드 프레임 단위로 분리하여 전송하되, 상기 각 단말국 채널 수신 상태 정보(SNR)에 따라 단말국 별로 전송방식을 다르게 할당하고, 서로 다른 전송방식으로 동시에 다수의 방송 스트림을 전송하며, 상기 중심국 연결수단으로부터 입력되는 IP 패킷 형태의 통신 데이터를 목적지 IP 주소를 이용하여 서로 다른 전송방식으로 매핑하여 전송하는 순방향링크 변조수단을 포함한다.
4. 발명의 중요한 용도
본 발명은 DVB-S2 기반 양방향 위성통신 시스템 등에 이용됨.
위성 통신, 통신 방송 융합 기술, 적응형 전송-
Patent Agency Ranking
公开(公告)号：KR1020070061283A
公开(公告)日：2007-06-13
申请号：KR1020060083170
申请日：2006-08-30
Applicant: 한국전자통신연구원 , 한양대학교 산학협력단
IPC: H04L27/38
CPC classification number: H04L25/067 , H04L1/005 , H04L27/38
Abstract: An apparatus and a method for generating a soft bit metric and a M-array QAM(Quadrature Amplitude Modulation) receiving system using the same are provided to lower designing complexity by using Max-Log-Map algorithm when converting a symbol signal into bit information. An apparatus for generating a soft bit metric includes an analog/digital signal converting unit(51), a scaling unit(52), a positive integer converting unit(53), a sign determination unit(54), and a bit information converting unit(55). The analog/digital signal conversion unit(51) converts an analog symbol signal of a demodulated I(Inphase)-channel or Q (Quadrature)-channel into a digital signal. The scaling unit(52) scales the converted digital signal based on an interval determination reference value between symbols. The positive integer converting unit(53) calculates a positive integer of the scaled digital I or Q-channel symbol signal. The sign determination unit(54) determines a sign of the scaled digital I or Q-channel symbol signal. The bit information converting unit(55) converts the scaled digital I or Q-channel symbol signal into each soft bit metric information classified by bits based on the calculated positive integer and the determined sign value.
Abstract translation: 提供了一种用于产生软比特量度的装置和方法以及使用其的M阵列QAM（正交幅度调制）接收系统，以便在将符号信号转换为比特信息时通过使用Max-Log-Map算法降低设计复杂度。 用于产生软比特度量的装置包括模拟/数字信号转换单元（51），缩放单元（52），正整数转换单元（53），符号确定单元（54）和比特信息转换单元 （55）。 模拟/数字信号转换单元（51）将解调的I（同相）信道或Q（正交）信道的模拟符号信号转换为数字信号。 缩放单元（52）基于符号之间的间隔确定参考值对经转换的数字信号进行缩放。 正整数转换单元（53）计算缩放的数字I或Q通道符号信号的正整数。 符号确定单元（54）确定缩放的数字I或Q通道符号信号的符号。 位信息转换单元（55）基于所计算的正整数和所确定的符号值，将缩放的数字I或Q信道符号信号转换为由比特分类的每个软比特度量信息。
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公开(公告)号：KR1020070060938A
公开(公告)日：2007-06-13
申请号：KR1020050121173
申请日：2005-12-09
Applicant: 한국전자통신연구원 , 서강대학교산학협력단
CPC classification number: H04L1/0045 , H03M13/136 , H03M13/15 , H03M13/6561 , H04H40/90 , H04L1/0057 , H04L1/0072 , H04L1/08
Abstract: A decoding method for detecting a PLSC(Physical Layer Signaling Code) of a satellite broadcasting system frame is provided to improve reliability of PLSC decoding by performing (32,6) Reed-Muller decoding in parallel and reduce the quantity of calculations. A symbol vector is received, and a sum vector and a difference vector of a symbol pair are obtained from the received symbol vector. (32,6) Reed-Muller decoding using Hadamard matrix is performed on the sum vector and the difference vector to estimate a message bit of the sum vector and a message bit of the difference vector. The message bits are PLSC-encoded and modulated(403,404). A difference between the received symbol vector and a symbol according to the sum vector and a difference between the received symbol vector and a symbol according to the difference vector are calculated and compared to each other(405,406). When the difference according to the sum vector is smaller than the difference according to the difference vector, it is determined that Reed-Muller codeword is repeated. When the difference according to the sum vector is greater than the difference according to the difference vector, it is determined that Reed-Muller codeword is inverted.
Abstract translation: 提供了一种用于检测卫星广播系统帧的PLSC（物理层信令码）的解码方法，以通过并行执行（32,6）里德 - 穆勒解码来减少计算量来提高PLSC解码的可靠性。 接收符号向量，从接收到的符号向量获得符号对的和矢量和差矢量。 （32,6）使用Hadamard矩阵的Reed-Muller解码对和矢量和差矢量执行，以估计和矢量的消息比特和差矢量的消息比特。 消息位是PLSC编码和调制（403,404）。 计算接收到的符号矢量与根据和矢量的符号与根据差分矢量的接收符号矢量与符号之间的差异，并进行比较（405,406）。 当根据和矢量的差小于根据差矢量的差时，确定Reed-Muller码字被重复。 当根据和矢量的差大于根据差矢量的差时，确定Reed-Muller码字被反转。
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公开(公告)号：KR100660056B1
公开(公告)日：2006-12-20
申请号：KR1020050106042
申请日：2005-11-07
Applicant: 한국전자통신연구원
IPC: H04N7/20
Abstract: An independent stream extraction and soft decision apparatus for a hierarchical modulation signal and a method therefor are provided to independently extract an HP(High Priority) stream and an LP(Low Priority) stream hierarchically modulated from the hierarchical modulation signal, softly to decide the HP stream and the LP stream, and to transmit the HP stream and the LP stream to a corresponding decoder. A signal synchronizing unit(405) receives a hierarchical modulation signal from the outside, and performs a synchronization function. A signal splitting unit(410) splits the receiving signal synchronized in the signal synchronizing unit(405). An HP stream extraction and soft decision unit(420) extracts an HP stream from one receiving signal split in the signal splitting unit(410), and performs soft decision. An operating device, having an absolute value operating unit(440), a triangular function generating unit(460), a multiplication operating unit(450), and an adder(470), operates the other receiving signal split in the signal splitting unit(410) to be capable of classifying a constellation dot. An LP stream extraction and soft decision unit(480) extracts an LP stream from the receiving signal operated in the operating device.
Abstract translation: 提供一种用于分级调制信号的独立流提取和软判定装置及其方法，用于独立地提取从分级调制信号分级调制的HP（高优先级）流和LP（低优先级）流，以便软判定HP 流和LP流，并且将HP流和LP流发送到对应的解码器。 信号同步单元（405）从外部接收分级调制信号，并执行同步功能。 信号分割单元（410）分割在信号同步单元（405）中同步的接收信号。 HP流提取和软判定单元（420）从信号拆分单元（410）中拆分的一个接收信号中提取HP流，并执行软判决。 具有绝对值运算单元（440），三角函数产生单元（460），乘法运算单元（450）和加法器（470）的操作装置操作在信号拆分单元中拆分的另一接收信号 410）能够对星座点进行分类。 LP流提取和软判决单元（480）从操作装置中操作的接收信号中提取LP流。
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19.发明授权ＡＣＭ 모드를 순방향링크로 사용하여 안정적인 망동기를유지하기 위한 중심국의 망동기 획득 장치 및 그 방법 失效一种网络主控网络获取装置和方法，用于使用ACM模式作为前向链路来维持稳定的网络
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公开(公告)号：KR1020040036996A
公开(公告)日：2004-05-04
申请号：KR1020020065601
申请日：2002-10-25
Applicant: 한국전자통신연구원
IPC: H04L27/22
CPC classification number: H04L1/0045 , H04L27/227 , H04L2027/0067 , H04L2027/0095
Abstract: PURPOSE: A generalized phase ambiguity resolution apparatus suitable for an adaptive modem is provided to effectively apply to the adaptive modem by a simple implementation method by solving the phase ambiguity with the same algorithm. CONSTITUTION: A generalized phase ambiguity resolution apparatus suitable for an adaptive modem includes an error correction coding unit(52), a modulation unit(53), a demodulation unit(54), a phase ambiguity value detection unit, a phase ambiguity removing unit and an error correction decoding unit(57). The error correction coding unit(52) performs coding phase ambiguity removed data. The demodulation unit(54) modulates the demodulated data. The phase ambiguity value detection unit detect the phase ambiguity value for the demodulated data. The phase ambiguity removing unit solves the phase ambiguity for the detected phase ambiguity value. And, the error correction decoding unit(57) performs the demodulation for the error correction to the phase ambiguity removed data.
Abstract translation: 目的：提供一种适用于自适应调制解调器的广义相位模糊度分辨率设备，通过简单的实现方法，通过相同算法求解相位模糊度，有效地应用于自适应调制解调器。 构成：适用于自适应调制解调器的广义相位模糊度解析装置包括纠错编码单元（52），调制单元（53），解调单元（54），相位模糊度值检测单元，相位模糊度去除单元和 纠错解码单元（57）。 纠错编码单元（52）执行编码相位模糊移除数据。 解调单元（54）调制解调数据。 相位模糊值检测单元检测解调数据的相位模糊度值。 相位模糊度去除单元解决了检测到的相位模糊度值的相位模糊度。 并且，纠错解码单元（57）对相位模糊移除数据进行纠错解调。
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