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公开(公告)号：KR101269555B1
公开(公告)日：2013-06-04
申请号：KR1020090127730
申请日：2009-12-21
Applicant: 한국전자통신연구원
CPC classification number: H04B7/18528
Abstract: 본 발명은 위성 VSAT 단말 장치 및 그 제어 방법에 관한 것으로서, 본 발명에 따른 위성 VSAT 단말 장치는 저가의 사용자 단말을 지향하는 위성 VSAT 시스템에서 실외유닛(ODU:OutDoor Unit)으로 제한 사항, 즉 불록상황변환기(BUC, Block Up Convertor)에서 자동신호레벨 제어 등의 기능이 없는 경우 등으로 인해 송신신호출력 제어 등이 안되는 경우, 인접채널에 대한 간섭 요구사항이 커서 송신 출력 제한이 큰 경우, 인접채널(반송파)의 개수가 많은 경우, 위성다중빔환경에서 주파수 및 편파(polarization) 재사용 등으로 인해 인접채널 간섭이 큰 경우, 실내유닛(IDU:InDoor Unit)에서 실외유닛으로 전달할 신호의 변조방식을 선형 또는 비선형으로 절체할 수 있는 것을 특징으로 한다.
ODB, IDU, VSAT, ALC-
Patent Agency Ranking
公开(公告)号：KR1020110070682A
公开(公告)日：2011-06-24
申请号：KR1020100030053
申请日：2010-04-01
Applicant: 한국전자통신연구원
IPC: H04L27/18
CPC classification number: H04L25/067 , H04L27/18
Abstract: PURPOSE: A soft-decision demapping method of a digital signal is provided to reduce comparison calculation operation, by selecting a spot positioned in constellation with only phase information of a symbol in advance. CONSTITUTION: Reference symbols are selected using most significant bit(MSB) of a received signal. The selected reference symbols are selected according to location probability of the received signal among total reference symbols on the constellation. The maximum value of the log likelihood ratio(LLR) is acquired for the selected reference symbols. The total reference symbols are phase-shifted.
Abstract translation: 目的：提供一种数字信号的软决策解映射方法，以通过仅预先标识符号中仅定位符号的相位信息选择位于星座中的光点来减少比较计算操作。 构成：使用接收信号的最高有效位（MSB）来选择参考符号。 所选择的参考符号是根据星座上的总参考符号之间的接收信号的位置概率来选择的。 对于所选择的参考符号获取对数似然比（LLR）的最大值。 总参考符号是相移的。
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公开(公告)号：KR1020110071224A
公开(公告)日：2011-06-29
申请号：KR1020090127730
申请日：2009-12-21
Applicant: 한국전자통신연구원
CPC classification number: H04B7/18528
Abstract: PURPOSE: A duplex mode satellite VSAT(Very Small Aperture Terminal) terminal device and a control method are provided to switch the modulation manner of the IDU(InDoor Unit) according to a ODU(OutDoor Unit) environment and the satellite link environment ODU(OutDoor Unit). CONSTITUTION: An IDU(300) switches over the modulation manner into linear or nonlinear manner according to the control signal. A controller(400) outputs the control signal according to existence and nonexistence of the performance capability of ODU and the transmission power output control function. A IDU comprises a transmission and reception modem unit. A IDU switches over the linear or nonlinear manner the modulation manner inputted to an transmitting terminal among the transmitting and receiving modem part according to is the control signal.
Abstract translation: 目的：提供双工模式卫星VSAT（超小型终端）终端设备和控制方法，根据ODU（OutDoor Unit）环境和卫星链路环境ODU（OutDoor）切换IDU（InDoor Unit）的调制方式 单元）。 构成：IDU（300）根据控制信号将调制方式切换为线性或非线性方式。 控制器（400）根据ODU的性能能力和发射功率输出控制功能的存在和不存在来输出控制信号。 IDU包括发送和接收调制解调器单元。 IDU切换线性或非线性方式，根据控制信号，在发送和接收调制解调器部分中输入到发送终端的调制方式是切换。
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公开(公告)号：KR1020110071223A
公开(公告)日：2011-06-29
申请号：KR1020090127729
申请日：2009-12-21
Applicant: 한국전자통신연구원
CPC classification number: H04B7/18576 , H04L27/2657 , H04H20/51 , H04N7/20 , H04N21/6143
Abstract: PURPOSE: A transmission method at a DVB- RCS(Digital Video Broadcasting - Return Channel via Satellite) system, a receiving method, and a transmission device and a receiving device are provided to order to enhance the answer frequency estimation accuracy in the low SNR environment. CONSTITUTION: A burst configuration unit(110) includes a burst by dispersing and arranging a plurality of pilot symbols. A transmit unit(120) transmits the burst. A burst configuration part inserts the information for the dispersive arrangement of a plurality of pilot symbols into the burst. A burst configuration part divides a plurality of pilot symbols into at least 2 groups. A burst configuration part arranges the divided pilot symbols by dispersing within the burst.
Abstract translation: 目的：提供DVB-RCS（卫星数字视频广播 - 返回信道）系统，接收方式以及传输设备和接收设备的传输方法，以提高低SNR环境中的应答频率估计精度 。 构成：突发配置单元（110）通过分散和排列多个导频符号来包括突发。 发送单元（120）发送脉冲串。 突发配置部分将用于多个导频符号的分散布置的信息插入到突发中。 突发配置部分将多个导频符号划分为至少2组。 突发配置部分通过分散在脉冲串中来排列分开的导频符号。
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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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6.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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