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21. 发明授权

US08543106B2 Signal transmission mechanism with diversity gain in satellite communication network 有权
标题翻译：卫星通信网络中具有分集增益的信号传输机制
公开(公告)号：US08543106B2
公开(公告)日：2013-09-24
申请号：US12442072
申请日：2006-12-11
申请人： Hee-Wook Kim , Kun-Seok Kang , Do-Seob Ahn
发明人： Hee-Wook Kim , Kun-Seok Kang , Do-Seob Ahn
IPC分类号： H04W92/00
CPC分类号： H04B7/0669 , H04B7/15514 , H04B7/18582
摘要： Provided is a satellite communication system for obtaining a diversity gain by transmitting a signal applied with STBC. When a signal transmission band of a link between a satellite and a terminal differs from that of a link between a satellite and a repeater, the satellite communication system includes: a satellite for transmitting a first signal encoded to STBC using a band of a link formed between the satellite to a terminal and transmitting a second signal encoded to STBC using a band of a link formed between the satellite to a repeater; and at least one of frequency transforming repeaters for receiving the second signal through the band of the link formed between the satellite to the repeater, transforming the received second signal to a signal with other frequency band, and transmitting the transformed second signal using a band of a link formed to a terminal.
摘要翻译：提供了一种用于通过发送施加有STBC的信号来获得分集增益的卫星通信系统。当卫星和终端之间的链路的信号传输频带与卫星和中继器之间的链路的信号传输频带不同时，卫星通信系统包括：用于使用形成的链路的频带发送编码到STBC的第一信号的卫星在所述卫星到终端之间，并且使用在所述卫星与中继器之间形成的链路的频带来发送编码到STBC的第二信号; 以及频率变换中继器中的至少一个，用于通过在卫星与中继器之间形成的链路的频带接收第二信号，将接收到的第二信号变换为具有其他频带的信号，以及使用与终端形成的链接。

22. 发明授权

US08223858B2 Time synchronization method and frequency offset estimation method using the same in OFDM network 有权
标题翻译： OFDM网络中的时间同步方法和频偏估计方法
公开(公告)号：US08223858B2
公开(公告)日：2012-07-17
申请号：US12442319
申请日：2006-12-28
申请人： Hee-Wook Kim , Kun-Seok Kang , Do-Seob Ahn
发明人： Hee-Wook Kim , Kun-Seok Kang , Do-Seob Ahn
IPC分类号： H04L27/28
CPC分类号： H04L27/2657 , H04L27/2613 , H04L27/2662 , H04L27/2675
摘要： Provided are a time synchronization method and a frequency offset estimation method using the same in an OFDM system. The time synchronization method using a preamble transmitted from a transmitter to a receiver in the OFDM communication network includes the steps of: a) calculating a moving sum of a first sequence and a second sequence obtained by a product of neighboring elements in a received signal when the received signal containing a preamble is received from the transmitter; b) estimating a location of the received signal corresponding to the moving sum having a maximum value; and c) acquiring a time synchronization with respect to the received signal, based on the estimated location, wherein the first sequence is obtained from a product of neighboring elements in the preamble and a correlation value obtained by correlating another sequence with the first sequence is smaller than a predetermined value.
摘要翻译：提供了一种在OFDM系统中的时间同步方法和使用该方法的频率偏移估计方法。使用在OFDM通信网络中从发射机发送到接收机的前置码的时间同步方法包括以下步骤：a）计算接收信号中相邻元素乘积获得的第一序列和第二序列的移动和，从发射机接收包含前置码的接收信号; b）估计与具有最大值的移动和对应的接收信号的位置; 以及c）基于估计的位置获取相对于接收信号的时间同步，其中从前导码中的相邻元素的乘积获得第一序列，以及通过将另一序列与第一序列相关而获得的相关值较小超过预定值。

23. 发明申请

US20100027723A1 TIME SYNCHRONIZATION METHOD AND FREQUENCY OFFSET ESTIMATION METHOD USING THE SAME IN OFDM NETWORK 有权
标题翻译： OFDM网络中的时间同步方法和频率偏移估计方法
公开(公告)号：US20100027723A1
公开(公告)日：2010-02-04
申请号：US12442319
申请日：2006-12-28
申请人： Hee-Wook Kim , Kun-Seok Kang , Do-Seob Ahn
发明人： Hee-Wook Kim , Kun-Seok Kang , Do-Seob Ahn
IPC分类号： H04L27/06
CPC分类号： H04L27/2657 , H04L27/2613 , H04L27/2662 , H04L27/2675
摘要： Provided are a time synchronization method and a frequency offset estimation method using the same in an OFDM system. The time synchronization method using a preamble transmitted from a transmitter to a receiver in the OFDM communication network includes the steps of: a) calculating a moving sum of a first sequence and a second sequence obtained by a product of neighboring elements in a received signal when the received signal containing a preamble is received from the transmitter; b) estimating a location of the received signal corresponding to the moving sum having a maximum value; and c) acquiring a time synchronization with respect to the received signal, based on the estimated location, wherein the first sequence is obtained from a product of neighboring elements in the preamble and a correlation value obtained by correlating another sequence with the first sequence is smaller than a predetermined value.
摘要翻译：提供了一种在OFDM系统中的时间同步方法和使用该方法的频率偏移估计方法。使用在OFDM通信网络中从发射机发送到接收机的前置码的时间同步方法包括以下步骤：a）计算接收信号中相邻元素乘积获得的第一序列和第二序列的移动和，从发射机接收包含前置码的接收信号; b）估计与具有最大值的移动和对应的接收信号的位置; 以及c）基于估计的位置获取相对于接收信号的时间同步，其中从前导码中的相邻元素的乘积获得第一序列，以及通过将另一序列与第一序列相关而获得的相关值较小超过预定值。

24. 发明授权

US08289208B2 Device for tracking polarization 失效
标题翻译：用于跟踪极化的装置
公开(公告)号：US08289208B2
公开(公告)日：2012-10-16
申请号：US12664053
申请日：2008-05-08
申请人： Bon-Jun Ku , Do-Seob Ahn , Ho-Jin Lee
发明人： Bon-Jun Ku , Do-Seob Ahn , Ho-Jin Lee
IPC分类号： H04B7/185 , H04B1/00
CPC分类号： H04B7/10
摘要： Provided is a device for tracking polarizations. A receiving polarization tracking device includes a feeder for finding vertical and horizontal vector components by receiving vertical and horizontal polarizations, a polarization estimator for estimating distortion of polarizations using the vertical and horizontal vector components outputted from the feeder, a polarization controller for controlling amplitudes and phases of vertical and horizontal polarizations based on information about the estimated distortion from the polarization estimator and an output signal from the receiving polarization tracking device, and a combiner for combining the vertical and horizontal polarizations controlled from the polarization controller.
摘要翻译：提供了用于跟踪偏振的装置。接收偏振跟踪装置包括：通过接收垂直和水平偏振来发现垂直和水平矢量分量的馈线，用于使用从馈线输出的垂直和水平矢量分量估计极化失真的偏振估计器，用于控制幅度和相位的偏振控制器基于关于来自极化估计器的估计失真的信息和来自接收偏振跟踪装置的输出信号的垂直和水平偏振的组合器，以及用于组合从偏振控制器控制的垂直和水平极化的组合器。

25. 发明授权

US08170475B2 NGSO communication apparatus for extending operation time and reducing number of satellites using ATC 失效
标题翻译： NGSO通信设备，用于延长使用ATC的操作时间和减少卫星数量
公开(公告)号：US08170475B2
公开(公告)日：2012-05-01
申请号：US12427130
申请日：2009-04-21
申请人： Dae Sub Oh , Do-Seob Ahn , Ho Jin Lee
发明人： Dae Sub Oh , Do-Seob Ahn , Ho Jin Lee
IPC分类号： H04B7/185
CPC分类号： H04B7/18513
摘要： Provided are a non geostationary satellite orbit (NGSO) communication apparatus that extends an operation time using an ancillary territory component (ATC) and reduces a number of satellites, and an ATC and an operating method thereof. The NGSO communication apparatus extends an operation time using an ATC and reduces a number of satellites from a first ATC that communicates with a mobile earth station (MES), and a second ATC that communicates with the first ATC to relay data between the MES and the satellite when the first ATC is unable to communication with the satellite revolving along an orbit.
摘要翻译：提供了一种使用辅助领域组件（ATC）延长操作时间并减少卫星数量的非对地静止卫星轨道（NGSO）通信装置，以及ATC及其操作方法。 NGSO通信装置使用ATC扩展操作时间，并且从与移动地球站（MES）进行通信的第一ATC减少卫星的数量，以及与第一ATC通信的第二ATC，以在MES和当第一ATC无法与沿着轨道旋转的卫星通信时的卫星。

26. 发明申请

US20110053628A1 SERVICE PROVIDING SYSTEM AND METHOD IN SATELLITE COMMUNICATION SYSTEM 审中-公开
标题翻译：卫星通信系统中的服务提供系统和方法
公开(公告)号：US20110053628A1
公开(公告)日：2011-03-03
申请号：US12869186
申请日：2010-08-26
申请人： Hee-Wook Kim , Kunseok Kang , Do-Seob Ahn , Ho-Jin Lee
发明人： Hee-Wook Kim , Kunseok Kang , Do-Seob Ahn , Ho-Jin Lee
IPC分类号： H04B7/00
CPC分类号： H04B7/18539 , H04B7/2041
摘要： A service providing method in a satellite communication system includes: confirming positions of terminals when the terminals existing within a service area and intended to receive a service is connected to a satellite base station or a complementary terrestrial component; confirming first terminals, which communicate with the satellite base station, and second terminals, which communicate with the complementary terrestrial component, according to the positions of the terminals; allocating resources usable when communicating with the first terminals and resources usable when communicating with the second terminals; and providing a service to the terminals by using the allocated resources through multi-beams of the satellite base station and multi-beams of the complementary terrestrial component.
摘要翻译：卫星通信系统中的服务提供方法包括：当存在于业务区域内并且要接收业务的终端连接到卫星基站或互补地面组件时，确认终端的位置; 确定与卫星基站通信的第一终端，以及根据终端的位置与互补地面组件通信的第二终端; 分配与第一终端通信时可用的资源和与第二终端通信时可用的资源; 以及通过使用经由分配的资源通过卫星基站的多波束和互补地面分量的多波束向终端提供服务。

27. 发明申请

US20100128656A1 SATELLITE, MOBILE TERMINAL, AND COMPLEMENTARY TERRESTRIAL COMPONENT IN OFDM BASED MULTI-BEAM SATELLITE SYSTEM REUSING THE SAME FREQUENCY BAND FOR ALL THE BEAMS, AND COMMUNICATION METHOD THEREOF 有权
标题翻译：基于OFDM的多波束卫星系统中的卫星，移动终端和补充地面部件重新使用所有的相同的频带，以及通信方法
公开(公告)号：US20100128656A1
公开(公告)日：2010-05-27
申请号：US12537731
申请日：2009-08-07
申请人： Hee Wook KIM , Kunseok Kang , Do-Seob Ahn , Ho Jin Lee
发明人： Hee Wook KIM , Kunseok Kang , Do-Seob Ahn , Ho Jin Lee
IPC分类号： H04B7/185
CPC分类号： H04B7/2041 , H04L5/0023 , H04L5/0037 , H04L5/0069 , H04W72/0453 , H04W72/082
摘要： Provided is a communication method of a mobile terminal in an orthogonal frequency division multiplexing (OFDM) based multi-beam satellite system reusing the same frequency band for all the beams, the method including: receiving location information of the mobile terminal from a satellite to determine a location of the mobile terminal within multiple beams; determining a subcarrier group for a communication with the satellite according to the location of the mobile terminal within the multiple beams; and communicating with the satellite using the subcarrier group for the communication with the satellite.
摘要翻译：提供一种移动终端在基于正交频分复用（OFDM）的多波束卫星系统中对所有波束重复使用相同频带的通信方法，该方法包括：从卫星接收移动终端的位置信息，以确定移动终端在多个波束内的位置; 根据移动终端在多个波束内的位置，确定与卫星进行通信的子载波组; 并使用副载波组与卫星进行通信，以与卫星进行通信。

28. 发明授权

US08514770B2 Method of establishing uplink in mobile satellite communication system 有权
标题翻译：移动卫星通信系统建立上行链路的方法
公开(公告)号：US08514770B2
公开(公告)日：2013-08-20
申请号：US12612311
申请日：2009-11-04
申请人： Hee Wook Kim , Kunseok Kang , Do-Seob Ahn , Ho Jin Lee
发明人： Hee Wook Kim , Kunseok Kang , Do-Seob Ahn , Ho Jin Lee
IPC分类号： H04B7/185
CPC分类号： H04B7/18589 , H04B7/18545
摘要： Provided is a method of establishing an uplink in a mobile satellite communication system, the method including: receiving a random uplink access signal from terminals included in a coverage of a satellite beam; estimating a location of each of the terminals; calculating an uplink transmission point in time when each of the terminals transmits an uplink signal, based on the estimated location of each of the terminals; transmitting, to each of the terminals, the calculated uplink transmission point in time; and receiving the uplink signal from each of the terminals at the calculated uplink transmission point in time.
摘要翻译：提供了一种在移动卫星通信系统中建立上行链路的方法，所述方法包括：从包括在卫星波束覆盖范围内的终端接收随机上行接入信号; 估计每个终端的位置; 基于每个终端的估计位置，计算每个终端发送上行链路信号的时间上行链路传输点; 向每个终端发送所计算的上行链路传输点; 并且在所计算的上行链路传输点处接收来自每个终端的上行链路信号。

29. 发明授权

US08149762B2 Satellite, mobile terminal, and complementary terrestrial component in OFDM based multi-beam satellite system reusing the same frequency band for all the beams, and communication method thereof 有权
标题翻译：卫星，移动终端和基于OFDM的多波束卫星系统中的互补地面分量对所有波束重复使用相同的频带及其通信方法
公开(公告)号：US08149762B2
公开(公告)日：2012-04-03
申请号：US12537731
申请日：2009-08-07
申请人： Hee Wook Kim , Kunseok Kang , Do-Seob Ahn , Ho Jin Lee
发明人： Hee Wook Kim , Kunseok Kang , Do-Seob Ahn , Ho Jin Lee
IPC分类号： H04B7/185
CPC分类号： H04B7/2041 , H04L5/0023 , H04L5/0037 , H04L5/0069 , H04W72/0453 , H04W72/082
摘要： Provided is a communication method of a mobile terminal in an orthogonal frequency division multiplexing (OFDM) based multi-beam satellite system reusing the same frequency band for all the beams, the method including: receiving location information of the mobile terminal from a satellite to determine a location of the mobile terminal within multiple beams; determining a subcarrier group for a communication with the satellite according to the location of the mobile terminal within the multiple beams; and communicating with the satellite using the subcarrier group for the communication with the satellite.
摘要翻译：提供一种移动终端在基于正交频分复用（OFDM）的多波束卫星系统中对所有波束重复使用相同频带的通信方法，该方法包括：从卫星接收移动终端的位置信息，以确定移动终端在多个波束内的位置; 根据移动终端在多个波束内的位置，确定与卫星进行通信的子载波组; 并使用副载波组与卫星进行通信，以与卫星进行通信。

30. 发明申请

US20100164801A1 DEVICE FOR TRACKING POLARIZATION 失效
标题翻译：跟踪极化的装置
公开(公告)号：US20100164801A1
公开(公告)日：2010-07-01
申请号：US12664053
申请日：2008-05-08
申请人： Bon-Jun Ku , Do-Seob Ahn , Ho-Jin Lee
发明人： Bon-Jun Ku , Do-Seob Ahn , Ho-Jin Lee
IPC分类号： H04B7/10
CPC分类号： H04B7/10
摘要： Provided is a device for tracking polarizations. A receiving polarization tracking device includes a feeder for finding vertical and horizontal vector components by receiving vertical and horizontal polarizations, a polarization estimator for estimating distortion of polarizations using the vertical and horizontal vector components outputted from the feeder, a polarization controller for controlling amplitudes and phases of vertical and horizontal polarizations based on information about the estimated distortion from the polarization estimator and an output signal from the receiving polarization tracking device, and a combiner for combining the vertical and horizontal polarizations controlled from the polarization controller.
摘要翻译：提供了用于跟踪偏振的装置。接收偏振跟踪装置包括：通过接收垂直和水平偏振来发现垂直和水平矢量分量的馈线，用于使用从馈线输出的垂直和水平矢量分量估计极化失真的偏振估计器，用于控制幅度和相位的偏振控制器基于关于来自极化估计器的估计失真的信息和来自接收偏振跟踪装置的输出信号的垂直和水平偏振的组合器，以及用于组合从偏振控制器控制的垂直和水平极化的组合器。

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