公开(公告)号：US07206333B2

公开(公告)日：2007-04-17

申请号：US10410832

申请日：2003-04-09

申请人： Kwon-Hue Choi ,  Soo-Young Kim ,  Kwang-Jae Lim ,  Deock-Gil Oh

发明人： Kwon-Hue Choi ,  Soo-Young Kim ,  Kwang-Jae Lim ,  Deock-Gil Oh

IPC分类号： H04B1/00

CPC分类号： H04L5/026

摘要： Disclosed is a method for using a different symbol timing for users so as to reduce a multiple access interference component in a multi-carrier code division multiple access (MC-CDMA) system. For this purpose, the presented invention involves dividing the users of the MC-CDMA system into two groups and applying an offset to the symbol timing between the user groups to cause a symbol transition of the opposite user group in the middle of the symbol interval, thereby reducing the multiple access interference component included in a symbol decision variable after a chip combination.

摘要翻译： 公开了一种对于用户使用不同的符号定时以减少多载波码分多址（MC-CDMA）系统中的多址干扰分量的方法。 为此，本发明涉及将MC-CDMA系统的用户划分成两组，并将偏移应用于用户组之间的符号定时，以在符号间隔的中间引起相对用户组的符号转换， 从而在芯片组合之后减少包括在符号判定变量中的多址干扰分量。

公开(公告)号：US07313124B2

公开(公告)日：2007-12-25

申请号：US10893774

申请日：2004-07-16

申请人： Kwang-Jae Lim ,  Sooyoung Kim ,  Seong-Pal Lee

发明人： Kwang-Jae Lim ,  Sooyoung Kim ,  Seong-Pal Lee

IPC分类号： H04B7/216 ,  H04Q7/20

CPC分类号： H04L5/026 ,  H04J13/00 ,  H04J13/16 ,  H04L1/0003 ,  H04L1/0026 ,  H04L25/0224 ,  H04W52/243

摘要： Disclosed is an adaptive downlink packet transmission method for a multicarrier Code Division Multiple Access (MC-CDMA) system. The method can allocate radio resources efficiently according to the variations of channel conditions for each user terminal, allocate transmission power appropriately according to the interference from the same cell, and minimize interference to adjacent cells. The adaptive downlink packet transmission method includes the steps of: a) estimating a signal-to-interference-and-noise ratio (SINR) in a user terminal after channel equalization and despreading by measuring a downlink pilot channel; b) measuring an average interference factor and an average noise power; and c) allocating radio resources adaptively in the central station by determining transmission slots in a transmission frame, the number of spreading codes to be used in each transmission slot, symbol energy for each spreading code, and a transmission method, until transmission slots and packets to be allocated are not available.

摘要翻译： 公开了一种用于多载波码分多址（MC-CDMA）系统的自适应下行链路分组传输方法。 该方法可以根据每个用户终端的信道条件的变化有效地分配无线电资源，根据来自同一小区的干扰适当地分配传输功率，并最小化对相邻小区的干扰。 自适应下行链路分组传输方法包括以下步骤：a）通过测量下行链路导频信道，在信道均衡和解扩后估计用户终端中的信噪比（SINR）; b）测量平均干扰因子和平均噪声功率; 以及c）通过确定传输帧中的传输时隙，在每个传输时隙中使用的扩展码的数量，每个扩展码的符号能量以及传输方法，在中心站中自适应地分配无线电资源，直到传输时隙和分组 被分配不可用。

公开(公告)号：US08121208B2

公开(公告)日：2012-02-21

申请号：US11667711

申请日：2005-08-10

申请人： Young-Seog Song ,  Seong-Rag Kim ,  In-Kyeong Choi ,  Choong-Il Yeh ,  Seung-Joon Lee ,  Hyoung-Soo Lim ,  Kwang-Jae Lim ,  Yu-Ro Lee ,  Jong-Ee Oh ,  Dong-Seung Kwon ,  Seung-Ku Hwang ,  Chung-Yong Lee ,  Myeong-Cheol Shin

发明人： Young-Seog Song ,  Seong-Rag Kim ,  In-Kyeong Choi ,  Choong-Il Yeh ,  Seung-Joon Lee ,  Hyoung-Soo Lim ,  Kwang-Jae Lim ,  Yu-Ro Lee ,  Jong-Ee Oh ,  Dong-Seung Kwon ,  Seung-Ku Hwang ,  Chung-Yong Lee ,  Myeong-Cheol Shin

IPC分类号： H04L5/12

CPC分类号： H04B7/061 ,  H04B7/0669 ,  H04B7/0691 ,  H04B7/08 ,  H04L1/0003 ,  H04L1/0637 ,  H04L1/0675

摘要： The present invention relates to a multi-input multi-output (MIMO) system for enhancing transmission performance. The MIMO system uses space-time encoding and transmit antenna selection methods, and includes a transmitter (100) and a receiver (200). The transmitter (100) includes N transmit antennas (130-1, 130-4) that are more than M transmit antennas (130-1, 130-3) used for transmitting a signal to space channel, selects the M transmit antennas (130-1, 130-3) among the N transmit antennas (130-3 130-4), and transmits symbol by space-time encoding the symbol. The receiver (200) includes M receive antenna (120-1, 210-2) for receiving a signal from the space channel, detects an information symbol by using the signal received through the receive antenna (210-1, 210-2), generates transmit antenna selection information for selecting M transmit antennas (130-1, 130-3) among transmit antennas (i30-1, . . . 7130-4) with reference to a channel estimate, and returns the information to the transmitter.

摘要翻译： 本发明涉及用于增强传输性能的多输入多输出（MIMO）系统。 MIMO系统使用时空编码和发射天线选择方法，并且包括发射机（100）和接收机（200）。 发射机（100）包括比用于将信号发射到空间信道的M个发射天线（130-1,130-3）多的N个发射天线（130-1,140-4），选择M个发射天线 -1,130-3），并且通过对该符号进行空时编码来发送符号。 接收器（200）包括用于从空间信道接收信号的M个接收天线（120-1,210-2），通过使用通过接收天线（210-1,210-2）接收的信号来检测信息符号， 生成发送天线选择信息，用于参照信道估计来选择发射天线（i30-1，...，...，7130-4）中的M个发射天线（130-1,130-3），并将该信息返回给发射机。

公开(公告)号：US07903753B2

公开(公告)日：2011-03-08

申请号：US11574725

申请日：2005-02-28

申请人： Seung-Joon Lee ,  Choong-Il Yeh ,  Dong-Seung Kwon ,  Seung-Ku Hwang ,  Hyoung-Soo Lim ,  In-Kyeong Choi ,  Jong-Ee Oh ,  Kwang-Jae Lim ,  Seong-Rag Kim ,  Young-Seog Song ,  Yu-Ro Lee ,  Seong-Keun Oh ,  Moon-Il Lee

发明人： Seung-Joon Lee ,  Choong-Il Yeh ,  Dong-Seung Kwon ,  Seung-Ku Hwang ,  Hyoung-Soo Lim ,  In-Kyeong Choi ,  Jong-Ee Oh ,  Kwang-Jae Lim ,  Seong-Rag Kim ,  Young-Seog Song ,  Yu-Ro Lee ,  Seong-Keun Oh ,  Moon-Il Lee

IPC分类号： H04B7/02

CPC分类号： H04B7/02 ,  H04B7/0697 ,  H04L1/0612

摘要： A space-time code used for a transmitter to transmit a plurality of data symbols to a receiver in a MIMO system, the space-time code including a code word matrix for transmitting an amount of data symbols corresponding to a product of the number of transmit antennas and a spatial multiplexing rate during one block period, wherein a row index indicates combined signals transmitted through different transmit antennas and a column index indicates time slots that correspond to the number of transmit antennas, and wherein the number of data symbols allocated to each transmit antenna in a code block corresponds to the spatial multiplexing rate, and the data symbols are combined by different combining coefficients for each transmit antenna at every time slot, and simultaneously transmitted through different transmit antennas, and each transmit antenna transmits a different set of data symbols at every time slot.

摘要翻译： 用于发射机的空时码将多个数据符号发送到MIMO系统中的接收机，所述时空码包括用于发送对应于发射次数的乘积的数据符号量的码字矩阵 天线和一个块周期内的空间多路复用率，其中行索引表示通过不同发射天线发射的组合信号，列索引指示对应于发射天线数的时隙，并且其中分配给每个发射的数据符号数 代码块中的天线对应于空间复用速率，并且通过在每个时隙对每个发射天线的不同组合系数组合数据符号，并且同时通过不同的发射天线发射，并且每个发射天线发射不同的数据符号集合 在每个时间段

公开(公告)号：US07757155B2

公开(公告)日：2010-07-13

申请号：US11660152

申请日：2004-11-10

申请人： Kwang-Jae Lim ,  Hyoung-Soo Lim ,  Choomg-Il Yeh ,  Yu-Ro Lee ,  Jong-Ee Oh ,  Dong-Seung Kwon

发明人： Kwang-Jae Lim ,  Hyoung-Soo Lim ,  Choomg-Il Yeh ,  Yu-Ro Lee ,  Jong-Ee Oh ,  Dong-Seung Kwon

IPC分类号： H03M13/00

CPC分类号： H04L27/2608

摘要： Disclosed is a signal transmission method in a mobile communication system. Unequal error protection (UEP) ratios are determined so that the bits may have different received qualities according to the weights of the bits. The bits are repeated by a bit sequence repeater (210) according to the determined UEP ratios to generate a repeated bit sequence having a predetermined number of bits. The generated repeated bit, sequence is interleaved by an interleaver (220) and the interleaved bit sequence is symbol-mapped by a symbol-mapper (230) to generate a transmission symbol sequence, and the generated transmission symbol sequence is transmitted by the transmitter to a receiver. Furthermore, also a corresponding signal reception method, a corresponding signal transmitter and a corresponding signal receiver are disclosed.

摘要翻译： 公开了一种移动通信系统中的信号传输方法。 确定不相等的误差保护（UEP）比，使得比特可以根据比特的权重具有不同的接收质量。 根据确定的UEP比例，比特由比特序列中继器（210）重复以产生具有预定比特数的重复比特序列。 所生成的重复比特序列由交织器（220）进行交织，并且交织的比特序列由符号映射器（230）进行符号映射以产生传输符号序列，并且所生成的传输符号序列由发射机发射到 接收器 此外，还公开了相应的信号接收方法，相应的信号发射机和对应的信号接收机。

公开(公告)号：US20070296616A1

公开(公告)日：2007-12-27

申请号：US11660152

申请日：2004-11-10

申请人： Kwang-Jae Lim ,  Hyoung-Soo Lim ,  Choomg-II Yeh ,  Yu-Ro Lee ,  Jong-Ee Oh ,  Dong-Seung Kwon

发明人： Kwang-Jae Lim ,  Hyoung-Soo Lim ,  Choomg-II Yeh ,  Yu-Ro Lee ,  Jong-Ee Oh ,  Dong-Seung Kwon

IPC分类号： H04B7/24 ,  H03M13/35 ,  H04Q7/38

CPC分类号： H04L27/2608

摘要： Disclosed is a signal transmission method in a mobile communication system. Unequal error protection (UEP) ratios are determined so that the bits may have different received qualities according to the weights of the bits. The bits are repeated by a bit sequence repeater (210) according to the determined UEP ratios to generate a repeated bit sequence having a predetermined number of bits. The generated repeated bit, sequence is interleaved by an interleaver (220) and the interleaved bit sequence is symbol-mapped by a symbol-mapper (230) to generate a transmission symbol sequence, and the generated transmission symbol sequence is transmitted by the transmitter to a receiver. Furthermore, also a corresponding signal reception method, a corresponding signal transmitter and a corresponding signal receiver are disclosed.

摘要翻译： 公开了一种移动通信系统中的信号传输方法。 确定不相等的误差保护（UEP）比，使得比特可以根据比特的权重具有不同的接收质量。 根据确定的UEP比例，比特由比特序列中继器（210）重复以产生具有预定比特数的重复比特序列。 所生成的重复比特序列由交织器（220）进行交织，并且交织的比特序列由符号映射器（230）进行符号映射以产生传输符号序列，并且所生成的传输符号序列由发射机发射到 接收器 此外，还公开了相应的信号接收方法，相应的信号发射机和对应的信号接收机。

公开(公告)号：US07701961B2

公开(公告)日：2010-04-20

申请号：US10493276

申请日：2002-10-21

申请人： Kwang-Jae Lim ,  Soo-Young Kim

发明人： Kwang-Jae Lim ,  Soo-Young Kim

IPC分类号： H04L12/413

CPC分类号： H04B7/18539 ,  H04B7/216

摘要： Provided is a method and apparatus for common packet channel access to transmit data packet from a mobile terminal to a satellite access network in a mobile satellite communication system. The method and apparatus of this invention reduces transmission delay time, enhances the probability of successful access, and controls the currently used common packet channel by using a common control channel broadcast by the satellite access network. The method includes the steps of: receiving an access preamble including an access signature code and a collision-detection preamble including a collision-detection signature code, which are transmitted together from a plurality of mobile terminals, and transmitting an acknowledgement to the access preamble and collision-detection preamble to mobile terminals through a preamble acknowledgement channel.

摘要翻译： 提供了一种用于在移动卫星通信系统中从移动终端向卫星接入网络发送数据分组的公共分组信道接入的方法和装置。 本发明的方法和装置减少了传输延迟时间，增加了成功接入的概率，并且通过使用由卫星接入网广播的公共控制信道来控制当前使用的公共分组信道。 该方法包括以下步骤：接收包括从多个移动终端一起发送的包括冲突检测签名码的接入签名码和冲突检测前同步码的接入前导码，并向接入前导码发送确认， 通过前导确认信道向移动终端发送冲突检测前导码。

公开(公告)号：US20080240276A1

公开(公告)日：2008-10-02

申请号：US11667711

申请日：2005-08-10

申请人： Young-Seog Song ,  Seong-Rag Kim ,  In-Kyeong Choi ,  Choong-ll Yeh ,  Seung-Joon Lee ,  Hyoung-Soo Lim ,  Kwang-Jae Lim ,  Yu-Ro Lee ,  Jong-Ee Oh ,  Dong-Seung Kwon ,  Seung-Ku Hwang ,  Chung-Yong Lee ,  Myeong-Cheol Shin

发明人： Young-Seog Song ,  Seong-Rag Kim ,  In-Kyeong Choi ,  Choong-ll Yeh ,  Seung-Joon Lee ,  Hyoung-Soo Lim ,  Kwang-Jae Lim ,  Yu-Ro Lee ,  Jong-Ee Oh ,  Dong-Seung Kwon ,  Seung-Ku Hwang ,  Chung-Yong Lee ,  Myeong-Cheol Shin

IPC分类号： H04L5/12 ,  H04L27/28

CPC分类号： H04B7/061 ,  H04B7/0669 ,  H04B7/0691 ,  H04B7/08 ,  H04L1/0003 ,  H04L1/0637 ,  H04L1/0675

摘要： The present invention relates to a multi-input multi-output (MIMO) system for enhancing transmission performance. The MIMO system uses space-time encoding and transmit antenna selection methods, and includes a transmitter (100) and a receiver (200). The transmitter (100) includes N transmit antennas (130-1, 130-4) that are more than M tansrni antennas (130-1, 130-3) used for transmitting a signal to space channel, selects the M transmit antennas (130-1, 130-3) among the N transmit antennas (130-3 130-4), and transmits symbol by space-time encoding the symbol. The receiver (200) includes M receive antenna (120-1, 210-2) for receiving a signal from the space channel, detects an information symbol by using the signal received through the receive antenna (210-1, 210-2), generates transmit antenna selection information for selecting M transmit antennas (130-1, 130-3) among transmit antennas (i30-1, . . . 7130-4) with reference to a channel estimate, and returns the information to the transmitter.

摘要翻译： 本发明涉及用于增强传输性能的多输入多输出（MIMO）系统。 MIMO系统使用时空编码和发射天线选择方法，并且包括发射机（100）和接收机（200）。 发射机（100）包括比用于将信号发射到空间信道的M多个天线（130-1,30-3）多的N个发射天线（130-1,140-4），选择M个发射天线（130 -1,130-3），并且通过对该符号进行时空编码来发送符号。 接收器（200）包括用于从空间信道接收信号的M个接收天线（120-1,210-2），通过使用通过接收天线（210-1,210-2）接收的信号来检测信息符号， 生成用于参考信道估计在发射天线（i 30-1，...，7130-4）中选择M个发射天线（130-1,130-3）的发射天线选择信息，并将该信息返回给发射机。

公开(公告)号：US07324465B2

公开(公告)日：2008-01-29

申请号：US10399330

申请日：2001-10-17

申请人： Kwang-Jae Lim ,  Soo-Young Kim ,  Ho-Jin Lee ,  Moon-Hee You

发明人： Kwang-Jae Lim ,  Soo-Young Kim ,  Ho-Jin Lee ,  Moon-Hee You

IPC分类号： H04Q7/00

CPC分类号： H04W74/006 ,  H04B7/18558 ,  H04W74/0833 ,  H04W84/06

摘要： The present invention relates to Random Access Channel (RACH) access apparatus for mobile satellite communication system and method therefor. The method for accessing random access channel (RACH) on satellite system, random access channel (RACH) carrying message from a plurality of mobile stations to the satellite system, the method includes the steps of: receiving preamble and the message, the message successively transmitted with the preamble from the plurality of mobile stations; and transmitting acquisition response signal corresponding to the preamble or the message to the plurality of mobile stations. Accordingly, success of packet reception of satellite system is improved and transmission delay is reduced.

摘要翻译： 本发明涉及用于移动卫星通信系统的随机接入信道（RACH）接入装置及其方法。 用于在卫星系统上接入随机接入信道（RACH），从多个移动台携带消息的随机接入信道（RACH）到卫星系统的方法，所述方法包括以下步骤：接收前同步码和所述消息，所述消息被连续发送 来自多个移动站的前导码; 以及将与所述前导码或所述消息对应的获取响应信号发送到所述多个移动站。 因此，提高卫星系统的分组接收成功，减少传输延迟。

公开(公告)号：US07254117B2

公开(公告)日：2007-08-07

申请号：US10493158

申请日：2002-10-21

申请人： Kwon-Hue Choi ,  Kwang-Jae Lim ,  Soo-Young Kim

发明人： Kwon-Hue Choi ,  Kwang-Jae Lim ,  Soo-Young Kim

IPC分类号： H04B7/185

CPC分类号： H04B7/18543

摘要： Apparatus and method for closed-loop power control in mobile satellite communication system, which can compensate round trip delay. The apparatus for closed-loop power control includes the means of; a) converting power control order from base earth station into power control step; b) measuring channel change rate from power of pilot channel; c) making tab coefficient using said channel change rate; d) compensating channel change due to loop delay using power control step; and e) renovating received signal power using said power control step.

摘要翻译： 移动卫星通信系统闭环功率控制的装置和方法，可以补偿往返延迟。 闭环功率控制装置包括： a）将基站的功率控制顺序转换为功率控制步骤; b）从导频信道的功率测量信道变化率; c）使用所述通道变化率制作标签系数; d）使用功率控制步骤补偿由于环路延迟引起的信道变化; 以及e）使用所述功率控制步骤翻新接收的信号功率。