公开(公告)号：US09136936B2

公开(公告)日：2015-09-15

申请号：US13328261

申请日：2011-12-16

申请人： Hee-Wook Kim ,  Kun-Seok Kang ,  Bon-Jun Ku ,  Do-Seob Ahn

发明人： Hee-Wook Kim ,  Kun-Seok Kang ,  Bon-Jun Ku ,  Do-Seob Ahn

IPC分类号： H04W84/06 ,  H04B7/185 ,  H04L5/00 ,  H01Q25/00 ,  H04W72/04

CPC分类号： H04B7/18515 ,  H01Q25/00 ,  H04L5/0023 ,  H04L5/0037 ,  H04W72/0453 ,  H04W84/06

摘要： A transmission apparatus and method for implementing frequency selectivity in a multi-beam satellite system that transmits a signal to user equipment through one or more antenna feed groups. The transmission apparatus includes: an antenna feed group selecting unit configured to select one or more antenna feed groups from the one or more antenna feed groups; a cyclic delay offset determining unit configured to determine a cyclic delay offset according to a determination result of the antenna feed group selecting unit; and a transmitting unit configured to apply the cyclic delay offset determined by the cyclic delay offset determining unit to a signal to be transmitted through the one or more antenna feed groups selected by the antenna feed group selecting unit, and to transmit a resultant signal.

摘要翻译： 一种用于在通过一个或多个天线馈送组向用户设备发送信号的多波束卫星系统中实现频率选择性的传输装置和方法。 发送装置包括：天线馈送组选择单元，被配置为从所述一个或多个天线馈送组中选择一个或多个天线馈送组; 循环延迟偏移确定单元，被配置为根据天线馈送组选择单元的确定结果确定循环延迟偏移; 以及发送单元，被配置为将由循环延迟偏移确定单元确定的循环延迟偏移应用于通过天线馈送组选择单元选择的一个或多个天线馈送组发送的信号，并发送结果信号。

公开(公告)号：US08665771B2

公开(公告)日：2014-03-04

申请号：US13090237

申请日：2011-04-19

申请人： Seung Hyun Nam ,  Hee Wook Kim ,  Kun Seok Kang ,  Do Seob Ahn ,  Ho Jin Lee

发明人： Seung Hyun Nam ,  Hee Wook Kim ,  Kun Seok Kang ,  Do Seob Ahn ,  Ho Jin Lee

IPC分类号： H04W72/04 ,  H04H20/71

CPC分类号： H04B7/18539

摘要： Disclosed is a communication method of a satellite mobile communication system. The communication method of a satellite mobile communication system, includes: receiving system information indicating frame intervals in which first user equipments using a satellite radio interface in commonality with a terrestrial radio interface do not perform communications from a base station; accessing the base station in the rest frame intervals other than frame intervals in which the first user equipments do not perform communications, based on the system information; transmitting the system information from the base station to second user equipments using a satellite radio interface optimized for satellite environment; and accessing the base station in the rest frame intervals based on the system information received in the second user equipments.

摘要翻译： 公开了一种卫星移动通信系统的通信方法。 卫星移动通信系统的通信方法包括：接收指示帧间隔的系统信息，其中使用与地面无线接口通用的卫星无线接口的第一用户设备不执行来自基站的通信; 基于所述系统信息，在所述第一用户设备不执行通信的帧间隔之外的其余帧间隔中访问所述基站; 使用为卫星环境优化的卫星无线接口将系统信息从基站发送到第二用户设备; 以及基于在第二用户设备中接收到的系统信息在休息帧间隔中访问基站。

公开(公告)号：US07443904B2

公开(公告)日：2008-10-28

申请号：US10699224

申请日：2003-10-30

申请人： Kwon-Hue Choi ,  Kun-Seok Kang ,  Soo-Young Kim ,  Deock-Gil Oh

发明人： Kwon-Hue Choi ,  Kun-Seok Kang ,  Soo-Young Kim ,  Deock-Gil Oh

IPC分类号： H04B1/00

CPC分类号： H04L27/2621 ,  H04B1/707 ,  H04B2201/70706 ,  H04L5/0021 ,  H04L25/03866 ,  H04L27/2602

摘要： Disclosed is an MC-CDMA scrambling system and method, and a recording medium for storing a program thereof. A transmitter receives user's bit streams, uses a fixed scrambling code, determined according to the user's orthogonal code combinations or the number of users and having a length equal to the number of subcarriers, and generates and outputs multicarrier signals. A receiver uses the scrambling code equal to that used by the transmitter, and receives the multicarrier signals from the transmitter, thereby converting the scrambling codes according to the users' orthogonal code combinations irrespective of user data, and easily reducing the PAPR (peak-to-average power ratio).

摘要翻译： 公开了一种MC-CDMA加扰系统和方法，以及用于存储其程序的记录介质。 发射机接收用户的比特流，使用根据用户的正交码组合或用户数量确定的长度等于子载波数量的固定扰码，并产生并输出多载波信号。 接收机使用等于发射机使用的扰码，并且从发射机接收多载波信号，从而根据用户的正交码组合转换扰码，而与用户数据无关，并且容易地减少PAPR（峰 - - 平均功率比）。

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。

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。

公开(公告)号：US20120033599A1

公开(公告)日：2012-02-09

申请号：US13090237

申请日：2011-04-19

申请人： Seung Hyun NAM ,  Hee Wook Kim ,  Kun Seok Kang ,  Do Seob Ahn ,  Ho Jin Lee

发明人： Seung Hyun NAM ,  Hee Wook Kim ,  Kun Seok Kang ,  Do Seob Ahn ,  Ho Jin Lee

IPC分类号： H04W72/04 ,  H04W4/06 ,  H04W88/06

CPC分类号： H04B7/18539

摘要： Disclosed is a communication method of a satellite mobile communication system. The communication method of a satellite mobile communication system, includes: receiving system information indicating frame intervals in which first user equipments using a satellite radio interface in commonality with a terrestrial radio interface do not perform communications from a base station; accessing the base station in the rest frame intervals other than frame intervals in which the first user equipments do not perform communications, based on the system information; transmitting the system information from the base station to second user equipments using a satellite radio interface optimized for satellite environment; and accessing the base station in the rest frame intervals based on the system information received in the second user equipments.

摘要翻译： 公开了一种卫星移动通信系统的通信方法。 卫星移动通信系统的通信方法包括：接收指示帧间隔的系统信息，其中使用与地面无线接口通用的卫星无线接口的第一用户设备不执行来自基站的通信; 基于所述系统信息，在所述第一用户设备不执行通信的帧间隔之外的其余帧间隔中访问所述基站; 使用为卫星环境优化的卫星无线接口将系统信息从基站发送到第二用户设备; 以及基于在第二用户设备中接收到的系统信息在休息帧间隔中访问基站。

公开(公告)号：US20100248714A1

公开(公告)日：2010-09-30

申请号：US12746316

申请日：2008-09-29

申请人： Yeon Su Kang ,  Kun Seok Kang ,  Do-Seob Ahn ,  Ho Jin Lee

发明人： Yeon Su Kang ,  Kun Seok Kang ,  Do-Seob Ahn ,  Ho Jin Lee

IPC分类号： H04W4/00

CPC分类号： H04L1/0668

摘要： The present invention relates to a method of transmitting a signal in a satellite communication system with a terrestrial component. The present invention transmits a signal using a method of transmitting a space-time code for joint communication between a satellite and a terrestrial component in a satellite system with a terrestrial component. Therefore, using the method of transmitting a space-time code, it is possible to obtain a space-time diversity gain in a satellite communication system with a terrestrial component. Further, it is possible to improve the receiving quality of a satellite signal at an area where the terrestrial component is located and increase the coverage of the terrestrial component.

摘要翻译： 本发明涉及在具有地面部件的卫星通信系统中发送信号的方法。 本发明使用发射用于具有地面分量的卫星系统中的卫星与地面部件之间的联合通信的时空码的方法发送信号。 因此，使用发送空时码的方法，可以在具有地面分量的卫星通信系统中获得时空分集增益。 此外，可以提高地面部件所在的区域的卫星信号的接收质量，并增加地面部件的覆盖范围。

公开(公告)号：US20100182924A1

公开(公告)日：2010-07-22

申请号：US12667433

申请日：2008-05-08

申请人： Tae Chul Hong ,  Kun Seok Kang ,  Do-Seob Ahn ,  Ho Jin Lee

发明人： Tae Chul Hong ,  Kun Seok Kang ,  Do-Seob Ahn ,  Ho Jin Lee

IPC分类号： H04W24/00 ,  H04H20/71

CPC分类号： H04B7/18591 ,  H04W72/005

摘要： The present invention is directed to a method of changing a transmission mode, a method of requesting a packet retransmission, and a method of retransmitting a packet with respect to a broadcasting or multicast service. According to the invention, a plurality of terminals provided with one broadcasting or multicast service shares one random access channel (RACH) so as to transmit channel information. Accordingly, a base station receives the channel information through one RACH from the terminal or detects a packet collision generated in the RACH to confirm a request for changing the transmission mode or a request for maintaining the transmission mode by the terminal.

摘要翻译： 本发明涉及一种改变传输模式的方法，一种请求分组重传的方法，以及一种关于广播或组播业务重传分组的方法。 根据本发明，具有一个广播或多播服务的多个终端共享一个随机接入信道（RACH），以便发送信道信息。 因此，基站从终端通过一个RACH接收信道信息，或者检测在RACH中产生的分组冲突，以确认终端改变发送模式的请求或维持发送模式的请求。

公开(公告)号：US20100050035A1

公开(公告)日：2010-02-25

申请号：US12441277

申请日：2007-09-13

申请人： Tae-Chul Hong ,  Kun-Seok Kang ,  Do-Seob Ahn ,  Ho-Jin Lee

发明人： Tae-Chul Hong ,  Kun-Seok Kang ,  Do-Seob Ahn ,  Ho-Jin Lee

IPC分类号： H04L1/08 ,  G06F11/14

CPC分类号： H04L1/1819 ,  H04L1/1809

摘要： Provided is a method for preventing consecutive packet errors in a transmitter by combining a hybrid automatic repeat request (HARQ) type II with a selective automatic repeat request (ARQ), including: transmitting a data packet from the transmitter to a receiver; when a negative acknowledgement (NACK) packet corresponding to the data packet is received from the receiver, checking stored information in the NACK packet wherein the stored information represent whether or not the data packet is stored in a buffer; when the data packet is stored in the buffer, transmitting a packet having parity bits to the receiver and storing the data packet in a retransmission queue; and when the data packet is not stored in the buffer, re-transmitting the data packet and maintaining the data packet stored in a transmission queue.

摘要翻译： 提供了一种通过将II型混合自动重复请求（HARQ）与选择性自动重传请求（ARQ）组合来防止发射机中的连续分组错误的方法，包括：将数据分组从发射机发射到接收机; 当从接收器接收到对应于数据分组的否定确认（NACK）分组时，检查NACK分组中存储的信息，其中所存储的信息表示数据分组是否存储在缓冲器中; 当数据分组存储在缓冲器中时，向接收机发送具有奇偶校验位的分组，并将数据分组存储在重传队列中; 并且当数据分组未存储在缓冲器中时，重新发送数据分组并维护存储在传输队列中的数据分组。

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。