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    • 3. 发明申请
    • BEACON SIGNAL GENERATING APPARATUS IN SATELLITE COMMUNICATION SYSTEM AND PHASE SYNCHRONIZING APPARATUS USING THE SAME
    • 卫星通信系统中的信号信号发生装置及其相位同步装置
    • US20100034137A1
    • 2010-02-11
    • US11721074
    • 2005-12-08
    • Jin-Ho JoSeong-Pal Lee
    • Jin-Ho JoSeong-Pal Lee
    • H04B7/212
    • H04B7/2125H04B7/18589
    • Provided are a beacon signal generating apparatus and a phase synchronizing apparatus using the same for establishing a phase synchronization while tracking a phase variation of a Timing Source Oscillator (TSO) of a satellite using a simpler scheme at an earth station, in making a phase synchronization between a clock signal of an On board Switch (OBS) embedded in the satellite and that of the earth station in a Satellite Switched Time Division Multiple Access (SS-TDMA) satellite communication system. The inventive beacon signal generating apparatus embedded in a satellite comprises a frequency oscillator for creating a TSO frequency, a beacon signal generator for multiplying the TSO frequency to be matched with a beacon signal frequency to generate a beacon signal synchronized with the TSO frequency, and a transmitter for transmitting the beacon signal to each of earth stations to recovery a frequency synchronized with the TSO frequency.
    • 提供了一种信标信号发生装置和相位同步装置,用于在地球站使用更简单的方案来跟踪卫星的定时源振荡器(TSO)的相位变化来建立相位同步,以进行相位同步 在卫星上嵌入的车载交换机(OBS)的时钟信号和卫星交换时分多址(SS-TDMA)卫星通信系统中的地球站的时钟信号之间。 嵌入在卫星中的本发明的信标信号发生装置包括用于产生TSO频率的频率振荡器,用于将待匹配的TSO频率与信标信号频率相乘以生成与TSO频率同步的信标信号的信标信号发生器,以及 发射机,用于将信标信号发射到每个地球站以恢复与TSO频率同步的频率。
    • 4. 发明授权
    • Vehicle position tracking system via satellite and method thereof
    • 通过卫星的车辆位置跟踪系统及其方法
    • US07603232B2
    • 2009-10-13
    • US11636320
    • 2006-12-08
    • Cheon-Sik SinSeong-Pal Lee
    • Cheon-Sik SinSeong-Pal Lee
    • G01C21/00
    • G01C21/00
    • A vehicle position information transmitter via satellite, a method thereof, a vehicle position tracking system using the same and a method thereof are provided. The transmitter transmits vehicle position information and vehicle ID to the vehicle position information management center through the vehicle position information relay satellite if a satellite network communication state is good as the result of comparing a satellite signal intensity with a mobile communication signal intensity, or transmits vehicle position information and vehicle ID to the vehicle position information management center through the terrestrial network if a terrestrial network communication state is good as the result of comparing a satellite signal intensity with a mobile communication signal intensity.
    • 提供了一种通过卫星的车辆位置信息发送器,其方法,使用其的车辆位置跟踪系统及其方法。 作为卫星信号强度与移动通信信号强度进行比较的结果,如果卫星网络通信状态良好,则发射机通过车辆位置信息中继卫星将车辆位置信息和车辆ID发送到车辆位置信息管理中心,或者发送车辆 作为将卫星信号强度与移动通信信号强度进行比较的结果,如果地面网络通信状态良好,则通过地面网络向车辆位置信息管理中心发送位置信息和车辆ID。
    • 5. 发明申请
    • Apparatus and method for controlling switch of satellite transponder for multibeam communication
    • 卫星转发器用于多波束通信的控制装置及方法
    • US20070149119A1
    • 2007-06-28
    • US10579893
    • 2004-11-18
    • Jin-Ho JoKyung-Soo ChoiJong-Won EunSeong-Pal Lee
    • Jin-Ho JoKyung-Soo ChoiJong-Won EunSeong-Pal Lee
    • H04B7/185
    • H04B7/18515
    • Provided are an apparatus for controlling a switch of a satellite transponder for multibeam communication, and a method thereof. The apparatus and method can increase output efficiency of communicated satellite electric wave signals and reuse frequencies in one-to-one earth station communication or a one-to-multi earth station communication. The apparatus includes: an earth control station interfacing block for receiving and processing commands from an earth control station, collecting operation states of the switch controlling apparatus and reporting them to the earth control station; a reference frequency generating block for generating a reference clock needed to operate the switch controlling apparatus and generating a reference frequency based on the reference clock; and a switch controlling block for reading contents of a memory storing a switching sequence periodically, detecting and correcting errors of the contents to generate a switch control signal, and transmitting the signal to a radio frequency switch.
    • 提供一种用于控制用于多波束通信的卫星转发器的开关的装置及其方法。 该装置和方法可以提高一对一地球站通信或一对多地球站通信中传送的卫星电波信号和重用频率的输出效率。 该装置包括:地面控制站接口块,用于接收和处理来自地球控制站的命令,收集开关控制装置的操作状态并将其报告给地面控制站; 用于产生操作开关控制装置所需的参考时钟并基于参考时钟产生参考频率的参考频率产生模块; 以及用于周期性地读取存储切换序列的存储器的内容的开关控制块,检测和校正内容的错误以产生开关控制信号,并将该信号发送到射频开关。
    • 7. 发明授权
    • Beacon signal generating apparatus in satellite communication system and phase synchronizing apparatus using the same
    • 卫星通信系统中的信标信号发生装置及使用其的相位同步装置
    • US07881663B2
    • 2011-02-01
    • US11721074
    • 2005-12-08
    • Jin-Ho JoSeong-Pal Lee
    • Jin-Ho JoSeong-Pal Lee
    • H04B7/19
    • H04B7/2125H04B7/18589
    • Provided are a beacon signal generating apparatus and a phase synchronizing apparatus using the same for establishing a phase synchronization while tracking a phase variation of a Timing Source Oscillator (TSO) of a satellite using a simpler scheme at an earth station, in making a phase synchronization between a clock signal of an On board Switch (OBS) embedded in the satellite and that of the earth station in a Satellite Switched Time Division Multiple Access (SS-TDMA) satellite communication system. The inventive beacon signal generating apparatus embedded in a satellite comprises a frequency oscillator for creating a TSO frequency, a beacon signal generator for multiplying the TSO frequency to be matched with a beacon signal frequency to generate a beacon signal synchronized with the TSO frequency, and a transmitter for transmitting the beacon signal to each of earth stations to recovery a frequency synchronized with the TSO frequency.
    • 提供了一种信标信号发生装置和相位同步装置,用于在地球站使用更简单的方案来跟踪卫星的定时源振荡器(TSO)的相位变化来建立相位同步,以进行相位同步 在卫星中嵌入的车载交换机(OBS)的时钟信号和卫星交换时分多址(SS-TDMA)卫星通信系统中的地球站的时钟信号之间。 嵌入在卫星中的本发明的信标信号发生装置包括用于产生TSO频率的频率振荡器,用于将待匹配的TSO频率与信标信号频率相乘以生成与TSO频率同步的信标信号的信标信号发生器,以及 发射机,用于将信标信号发射到每个地球站以恢复与TSO频率同步的频率。
    • 8. 发明申请
    • Hybrid type satellite simulation system and method thereof
    • 混合型卫星仿真系统及其方法
    • US20060100846A1
    • 2006-05-11
    • US11182133
    • 2005-07-14
    • Sang-Uk LeeJae-Hoon KimHo-Jin LeeSeong-Pal Lee
    • Sang-Uk LeeJae-Hoon KimHo-Jin LeeSeong-Pal Lee
    • G06F9/45
    • B64G7/00B64G1/24H04L67/38
    • A hybrid-type satellite simulation system and a method thereof are disclosed. The system includes: a satellite modeling unit including a satellite model and a software model having flight dynamics and space environment data; a satellite operation unit for generating a telecommand, transmitting the telecommand to the satellite simulation system, receiving simulation result as a telemetry, analyzing the simulation result and displaying the analyzed result; a simulator kernel for managing and controlling the satellite simulation system; a TCP/IP interface processing unit for performing an interface function of TCP/IP level between the simulator kernel and a satellite onboard computer; an onboard computer interface processing unit for performing an interface function between the satellite onboard computer and the TCP/IP interface processing unit; and a satellite onboard computer including flight software for controlling a satellite.
    • 公开了一种混合型卫星仿真系统及其方法。 该系统包括:包括卫星模型和具有飞行动力学和空间环境数据的软件模型的卫星建模单元; 用于产生遥控的卫星操作单元,向卫星仿真系统发送遥控信号,接收模拟结果作为遥测,分析仿真结果并显示分析结果; 用于管理和控制卫星仿真系统的模拟器内核; TCP / IP接口处理单元,用于在模拟器内核和机载计算机之间执行TCP / IP级别的接口功能; 车载计算机接口处理单元,用于在卫星机载计算机和TCP / IP接口处理单元之间执行接口功能; 以及包含用于控制卫星的飞行软件的卫星机载计算机。
    • 9. 发明授权
    • High power amplifier operating point determination apparatus and method for satellite communications system
    • 用于卫星通信系统的大功率放大器工作点确定装置和方法
    • US06728650B2
    • 2004-04-27
    • US09986150
    • 2001-11-07
    • Jong Heung ParkByoung Hyun ChungSeung Woo ChungSeong-Pal Lee
    • Jong Heung ParkByoung Hyun ChungSeung Woo ChungSeong-Pal Lee
    • G06F1900
    • H03F3/602
    • A high power amplifier operating point determination apparatus and method determines an operating point of a high power amplifier for satellite communications system. For the purpose, the apparatus employs a DC voltage converting block in a channel amplifier located at a front-end of the high power amplifier, which couples an output power of the channel amplifier and converts the coupled output power to a DC voltage. Accordingly, in a ground monitoring center, before satellite launching, there are mapped the output power value of the high power amplifier and the DC voltage level of the channel amplifier per each command step assigned to an FGM or an ALC mode. After the satellite launching, it is possible to detect the operating point and the output power level of the high power amplifier based on mapped results by using the DC voltage level as telemetry information.
    • 高功率放大器工作点确定装置和方法确定用于卫星通信系统的高功率放大器的工作点。 为此,该装置在位于高功率放大器前端的通道放大器中采用直流电压转换模块,其耦合通道放大器的输出功率并将耦合的输出功率转换为直流电压。 因此,在地面监控中心,在卫星发射之前,映射每个分配给FGM或ALC模式的每个命令步骤的高功率放大器的输出功率值和信道放大器的直流电压电平。 在卫星发射后,可以通过使用直流电压电平作为遥测信息,基于映射结果来检测大功率放大器的工作点和输出功率电平。