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11. 发明授权

US08259646B2 Apparatus and method for acquiring frame synchronization and frequency synchronization simultaneously in communication system 失效
标题翻译：在通信系统中同时获取帧同步和频率同步的装置和方法
公开(公告)号：US08259646B2
公开(公告)日：2012-09-04
申请号：US12517432
申请日：2007-12-03
申请人： Pan-Soo Kim , Dae-Ig Jang , Deock-Gil Oh , Ho-Jin Lee
发明人： Pan-Soo Kim , Dae-Ig Jang , Deock-Gil Oh , Ho-Jin Lee
IPC分类号： H04J3/06
CPC分类号： H04L7/042 , H04L7/046 , H04L27/0014 , H04L2027/003
摘要： An apparatus and method for acquiring reliable frame synchronization performance and frequency synchronization simultaneously in a communication system includes a differential correlator outputting a result value obtained by performing a differential operation based on an input signal having symbol timing synchronization and a value pre-defined with a sender sending the input signal, a frequency error calculator compensating for a frequency error based on the result value of the differential correlator and a frequency compensation control signal, and a frame synchronization determiner outputting the frequency compensation control signal if the result value of the differential correlator is greater than a threshold set having at least one value. By introducing a correlation scheme, i.e. Differential Generalized Post Detection Integration (DGPDI), in which differential information corresponding to a half of a symbol duration length is used within a duration from a frame start symbol to a UW symbol duration in a TDM/TDMA transmission structure in which a low SNR and a high frequency error must be considered, a more reliable frame synchronization estimation value can be acquired in comparison to a conventional frame synchronization scheme in which differential information between single neighbor symbols is used.
摘要翻译：一种用于在通信系统中同时获取可靠的帧同步性能和频率同步的装置和方法包括差分相关器，其输出通过基于具有符号定时同步的输入信号执行差分运算而得到的结果值，以及预定义的发送器发送输入信号，基于差分相关器的结果值和频率补偿控制信号来补偿频率误差的频率误差计算器，以及如果差分相关器的结果值为大于具有至少一个值的阈值集合。通过引入相关方案，即差分广义后检测积分（DGPDI），其中对应于符号持续时间长度的一半的差分信息在TDM / TDMA传输中的帧开始符号到UW符号持续时间的持续时间内被使用必须考虑低SNR和高频误差的结构，与使用单个相邻符号之间的差分信息的常规帧同步方案相比，可以获得更可靠的帧同步估计值。

12. 发明授权

US07940713B2 Apparatus and method for traffic performance improvement and traffic security in interactive satellite communication system 失效
标题翻译：交互式卫星通信系统中交通绩效改善和交通安全的装置与方法
公开(公告)号：US07940713B2
公开(公告)日：2011-05-10
申请号：US11635295
申请日：2006-12-07
申请人： Gwang-Ja Jin , Min-Su Shin , Nam-Kyung Lee , Deock-Gil Oh , Ho-Jin Lee
发明人： Gwang-Ja Jin , Min-Su Shin , Nam-Kyung Lee , Deock-Gil Oh , Ho-Jin Lee
IPC分类号： H04L12/56
CPC分类号： H04L47/10 , H04B7/18593 , H04L47/14 , H04L47/40 , H04L63/0272 , H04L63/0428 , H04L63/164 , H04L69/16 , H04L69/161 , H04L69/163 , H04L69/168 , H04W12/02 , H04W80/04
摘要： There are provided an apparatus and method for traffic performance improvement and traffic security in an interactive satellite communication system. The method for traffic performance improvement of an interactive satellite communication system includes the steps of: a) storing an Internet protocol (IP) packet that is received from a user terminal connected to a satellite mobile terminal of the interactive satellite communication system and is to be transmitted to a central station through a satellite; b) transmitting acknowledgement for the stored IP packet to the user terminal by acting for the central station, before the stored IP packet is transmitted to the central station; and c) transmitting the stored IP packet through the satellite to the central station, and retransmitting an unacknowledged IP packet according to a retransmission request of the central station.
摘要翻译：提供了一种用于交互式卫星通信系统中的交通性能改善和交通安全的装置和方法。交互式卫星通信系统的交通性能改善方法包括以下步骤：a）存储从连接到交互式卫星通信系统的卫星移动终端的用户终端接收到的因特网协议（IP）分组，通过卫星传送到中心站; b）在所存储的IP分组被发送到中心站之前，通过对中心站的动作来向所述用户终端发送所存储的IP分组的确认; 以及c）通过所述卫星将所存储的IP分组发送到所述中心站，并且根据所述中心站的重发请求重传未确认的IP分组。

13. 发明授权

US07616710B2 Frequency offset estimating method and receiver employing the same 失效
标题翻译：频率偏移估计方法和采用该方法的接收机
公开(公告)号：US07616710B2
公开(公告)日：2009-11-10
申请号：US11297257
申请日：2005-12-07
申请人： Pan-Soo Kim , Yun-Jeoug Song , Byoung-Hak Kim , Deock-Gil Oh , Ho-Jin Lee
发明人： Pan-Soo Kim , Yun-Jeoug Song , Byoung-Hak Kim , Deock-Gil Oh , Ho-Jin Lee
IPC分类号： H04L27/14
CPC分类号： H04L27/0014 , H04L2027/003 , H04L2027/0046 , H04L2027/0065
摘要： Provided is a method for estimating carrier wave or doppler frequency offset based on an approximated quadratic non-linear function in fine search, and a receiver employing the method. The method for estimating frequency offset includes the steps of: a) extracting more than three discrete samples in an order where the discrete samples are close to a maximum value of a power spectrum density function; b) inducing a quadratic non-linear function by using the extracted discrete samples; and c) estimating the frequency offset from a maximum point of the quadratic non-linear function. The technology of the present research makes it possible to exactly estimate frequency offset without increasing hardware complexity in estimation of carrier wave or doppler frequency offset.
摘要翻译：提供了一种基于精细搜索中的近似二次非线性函数来估计载波或多普勒频率偏移的方法，以及采用该方法的接收机。用于估计频率偏移的方法包括以下步骤：a）以离散样本接近功率谱密度函数的最大值的顺序提取三个以上的离散样本; b）通过使用提取的离散样本来诱导二次非线性函数; 以及c）从二次非线性函数的最大点估计频率偏移。本研究的技术使得可以精确估计频偏，而不增加载波或多普勒频偏估计中的硬件复杂度。

14. 发明申请

US20050143003A1 Method for controlling data transmission rate in interactive satellite communication system 失效
标题翻译：交互式卫星通信系统中数据传输速率的控制方法
公开(公告)号：US20050143003A1
公开(公告)日：2005-06-30
申请号：US10916965
申请日：2004-08-11
申请人： Ki-Dong Lee , Ho-Jin Lee , Ho-Kyom Kim , Deock-Gil Oh
发明人： Ki-Dong Lee , Ho-Jin Lee , Ho-Kyom Kim , Deock-Gil Oh
IPC分类号： H04B7/26 , H04B7/185 , H04Q7/20
CPC分类号： H04B7/18532
摘要： A method for controlling data transmission rate in order to save waste of resources due to Non-Line Of Sight (NLOS) region when a mobile terminal passes through the NLOS region in an interactive satellite communication system is disclosed. The method includes the steps of setting at least one threshold; at a Network Control Center (NCC) adjusting allocated resources based on the Constant Resources Allocation (CRA) after detecting whether Satellite Access Control is lost or not; compensating transmission delay by reallocating if the mobile terminal returns from the NLOS region within a first threshold duration, wherein the mobile terminal maintains the fine sync state during the first threshold duration; and deallocating all resources allocated based on the CRA if the mobile terminal does not return from the NLOS region within the first threshold duration.
摘要翻译：公开了一种用于控制数据传输速率的方法，以便在移动终端通过交互式卫星通信系统中的NLOS区域时节省由于非视线（NLOS）区域引起的资源浪费。该方法包括以下步骤：设置至少一个阈值; 在网络控制中心（NCC）检测到卫星接入控制是否丢失之后，根据恒定资源分配（CRA）调整分配的资源; 如果所述移动终端在第一阈值持续时间内从所述NLOS区域返回，则通过重新分配来补偿传输延迟，其中所述移动终端在所述第一阈值持续时间期间保持所述精细同步状态; 并且如果移动终端在第一阈值持续时间内没有从NLOS区域返回，则释放基于CRA分配的所有资源。

15. 发明授权

US07286824B2 Method for controlling data transmission rate in interactive satellite communication system 失效
标题翻译：交互式卫星通信系统中数据传输速率的控制方法
公开(公告)号：US07286824B2
公开(公告)日：2007-10-23
申请号：US10916965
申请日：2004-08-11
申请人： Ki-Dong Lee , Ho-Jin Lee , Ho-Kyom Kim , Deock-Gil Oh
发明人： Ki-Dong Lee , Ho-Jin Lee , Ho-Kyom Kim , Deock-Gil Oh
IPC分类号： H04Q7/20
CPC分类号： H04B7/18532
摘要： A method for controlling data transmission rate in order to save waste of resources due to Non-Line Of Sight (NLOS) region when a mobile terminal passes through the NLOS region in an interactive satellite communication system is disclosed. The method includes the steps of setting at least one threshold; at a Network Control Center (NCC) adjusting allocated resources based on the Constant Resources Allocation (CRA) after detecting whether Satellite Access Control is lost or not; compensating transmission delay by reallocating if the mobile terminal returns from the NLOS region within a first threshold duration, wherein the mobile terminal maintains the fine sync state during the first threshold duration; and deallocating all resources allocated based on the CRA if the mobile terminal does not return from the NLOS region within the first threshold duration.
摘要翻译：公开了一种用于控制数据传输速率的方法，以便在移动终端通过交互式卫星通信系统中的NLOS区域时节省由于非视线（NLOS）区域引起的资源浪费。该方法包括以下步骤：设置至少一个阈值; 在网络控制中心（NCC）检测到卫星接入控制是否丢失之后，根据恒定资源分配（CRA）调整分配的资源; 如果所述移动终端在第一阈值持续时间内从所述NLOS区域返回，则通过重新分配来补偿传输延迟，其中所述移动终端在所述第一阈值持续时间期间保持所述精细同步状态; 并且如果移动终端在第一阈值持续时间内没有从NLOS区域返回，则释放基于CRA分配的所有资源。

16. 发明申请

US20070127599A1 Apparatus and method for phase recovery and I/Q imbalance compensation in quadrature demodulating receiver 审中-公开
标题翻译：正交解调接收机的相位恢复和I / Q不平衡补偿的装置和方法
公开(公告)号：US20070127599A1
公开(公告)日：2007-06-07
申请号：US11605646
申请日：2006-11-29
申请人： Yung-Jeong Song , Deock-Gil Oh , Ho-Jin Lee
发明人： Yung-Jeong Song , Deock-Gil Oh , Ho-Jin Lee
IPC分类号： H04L27/00 , H03D1/04
CPC分类号： H04L27/3863 , H03D3/009 , H04B1/12
摘要： An apparatus and method for phase recovery and I/O imbalance compensation in a quadrature demodulating receiver are provided. The apparatus includes: a phase error compensating unit for compensating a phase error for a reference channel which is one of the I channel and the Q channel; and a phase imbalance compensation unit for compensating a phase imbalance between the reference channel and a target channel that is the other of the I channel and the Q channel for the target channel based on the reference channel that is the phase error compensated channel at the phase error compensating unit.
摘要翻译：提供了一种用于正交解调接收机中的相位恢复和I / O不平衡补偿的装置和方法。该装置包括：相位误差补偿单元，用于补偿作为I信道和Q信道之一的参考信道的相位误差; 以及相位不平衡补偿单元，用于基于作为相位的相位误差补偿信道的参考信道来补偿参考信道和作为目标信道的I信道和Q信道中的另一个的目标信道之间的相位不平衡误差补偿单元。

17. 发明申请

US20060133314A1 Apparatus for allocating resources in DAMA satellite communication system and method thereof 失效
标题翻译：用于在DAMA卫星通信系统中分配资源的装置及其方法
公开(公告)号：US20060133314A1
公开(公告)日：2006-06-22
申请号：US11305587
申请日：2005-12-16
申请人： Ki-Dong Lee , Deock-Gil Oh , Ho-Jin Lee
发明人： Ki-Dong Lee , Deock-Gil Oh , Ho-Jin Lee
IPC分类号： H04Q7/00 , H04L12/43
CPC分类号： H04L41/0896 , H04W28/20
摘要： Provided are an apparatus for estimating an increment in the number of packets arriving at a transmission queue of each terminal and allocating resources to terminals based on the increment in a Demand Assignment Multiple Access (DAMA) satellite communication system, and a method thereof. The method, includes the steps of: a) comparing a summation of requested time slot quantities of terminals with a total number of available time slots; and b) allocating the time slots as much as the requested time slot quantity to each terminal and allocating remaining time slots additionally in proportion to an estimated increase in the number of packets arriving at a transmission queue of each terminal. The apparatus can raise efficiency of resources allocation in DAMA communications and reduce the packet transmission time in a terminal transmission queue.
摘要翻译：提供了一种用于估计到达每个终端的传输队列的分组数量的增量的装置，并且基于在请求分配多路访问（DAMA）卫星通信系统中的增量向终端分配资源及其方法。该方法包括以下步骤：a）将所请求的终端时隙量的总和与可用时隙的总数进行比较; 以及b）将所请求的时隙数量的时隙分配给每个终端，并且分配剩余时隙，以与到达每个终端的传输队列的分组数量的估计增加成比例地分配剩余时隙。该装置可以提高DAMA通信中资源分配的效率，并减少终端传输队列中的分组传输时间。

18. 发明授权

US07499421B2 Apparatus and method for resource allocation in MF-TDMA broadband satellite system 有权
标题翻译：在MF-TDMA宽带卫星系统中资源分配的装置和方法
公开(公告)号：US07499421B2
公开(公告)日：2009-03-03
申请号：US11217906
申请日：2005-09-01
申请人： Ki-Dong Lee , Deock-Gil Oh , Ho-Jin Lee , Kun-Nyeong Chang
发明人： Ki-Dong Lee , Deock-Gil Oh , Ho-Jin Lee , Kun-Nyeong Chang
IPC分类号： H04B7/212
CPC分类号： H04B7/2123 , H04B7/18578
摘要： Provided is a resource allocation apparatus and method in a multi frequency-time division multiple access (MF-TDMA) broadband satellite system, which can employ timeslots in a return link with a maximum throughput promptly, by dividing a timeslot assignment problem minimizing a weighted sum in response to a resource allocation request from terminals into a first sub-problem for deciding the number of timeslots to be allocated to each class of each terminal and a second sub-problem for selecting timeslots to be allocated to each terminal. The method includes the steps of accumulating an amount of resource requests created during a super-frame period for each terminal, deciding a resource allocation amount to be allocated to each class, and selecting and mapping timeslots to be allocated to each terminal based on the decided resource allocation amount. This invention may advantageously be applied to the MF-TDMA broadband satellite system.
摘要翻译：提供了一种在多频分时多址（MF-TDMA）宽带卫星系统中的资源分配装置和方法，其可以通过将时隙分配问题最小化，从而最大限度地减少加权和响应于从终端到用于决定要分配给每个终端的每个类别的时隙的数量的第一子问题的资源分配请求以及用于选择要分配给每个终端的时隙的第二子问题。该方法包括以下步骤：累积在每个终端的超帧周期期间创建的资源请求量，确定要分配给每个类的资源分配量，以及基于所决定的时间选择和映射要分配给每个终端的时隙资源配置量。本发明可以有利地应用于MF-TDMA宽带卫星系统。

19. 发明申请

US20060126552A1 Apparatus and method for resource allocation in MF-TDMA broadband satellite system 有权
公开(公告)号：US20060126552A1
公开(公告)日：2006-06-15
申请号：US11217906
申请日：2005-09-01
申请人： Ki-Dong Lee , Deock-Gil Oh , Ho-Jin Lee , Kun-Nyeong Chang
发明人： Ki-Dong Lee , Deock-Gil Oh , Ho-Jin Lee , Kun-Nyeong Chang
IPC分类号： H04B7/212
CPC分类号： H04B7/2123 , H04B7/18578
摘要： Provided is a resource allocation apparatus and method in a multi frequency-time division multiple access (MF-TDMA) broadband satellite system, which can employ timeslots in a return link with a maximum throughput promptly, by dividing a timeslot assignment problem minimizing a weighted sum in response to a resource allocation request from terminals into a first sub-problem for deciding the number of timeslots to be allocated to each class of each terminal and a second sub-problem for selecting timeslots to be allocated to each terminal. The method includes the steps of accumulating an amount of resource requests created during a super-frame period for each terminal, deciding a resource allocation amount to be allocated to each class, and selecting and mapping timeslots to be allocated to each terminal based on the decided resource allocation amount. This invention may advantageously be applied to the MF-TDMA broadband satellite system.

20. 发明申请

US20060114934A1 Network operation method in interactive satellite communications system 审中-公开
标题翻译：互动卫星通信系统中的网络运行方式
公开(公告)号：US20060114934A1
公开(公告)日：2006-06-01
申请号：US11193763
申请日：2005-07-28
申请人： Minsu Shin , Deock-Gil Oh , Ho-Jin Lee
发明人： Minsu Shin , Deock-Gil Oh , Ho-Jin Lee
IPC分类号： H04J3/22 , H04J3/16 , H04Q7/24 , H04B7/185
CPC分类号： H04B7/18584
摘要： A network operation method in an interactive satellite communications system interworking with an external network without modifying a network setting is provided. The network operation method in a base station of the interactive satellite communications system includes the steps of: receiving a data request packet from a user; converting a private internet protocol (IP) address of the user into a public IP address; transmitting the data request packet to an external server; receiving a response packet to the data request packet from the external server and converting the converted public IP address into the private IP address; and transmitting the received response packet to the user by using information on a mapping table.
摘要翻译：提供了在不修改网络设置的情况下与外部网络相互配合的交互式卫星通信系统中的网络操作方法。交互式卫星通信系统的基站中的网络操作方法包括以下步骤：从用户接收数据请求分组; 将用户的私人网际协议（IP）地址转换为公共IP地址; 将数据请求包发送到外部服务器; 从所述外部服务器接收到所述数据请求分组的响应分组，并将所转换的公共IP地址转换成所述专用IP地址; 以及通过使用关于映射表的信息将接收到的响应分组发送给用户。

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