公开(公告)号：US07969926B2

公开(公告)日：2011-06-28

申请号：US12200824

申请日：2008-08-28

申请人： Jin-Ghoo Choi ,  Sung-Yoon Jung ,  Seong-Lyun Kim ,  Kwang-Soon Kim ,  Young-Jin Sang ,  Jung-Min Park ,  Young-Ju Hwang

发明人： Jin-Ghoo Choi ,  Sung-Yoon Jung ,  Seong-Lyun Kim ,  Kwang-Soon Kim ,  Young-Jin Sang ,  Jung-Min Park ,  Young-Ju Hwang

IPC分类号： H04B7/14

CPC分类号： H04B7/15542 ,  H04W16/30

摘要： A system and method for transmitting and receiving signals in a communication system are provided, in which a BS communicates with a first MS located within an inner area of a cell during first and second time periods in TDD and communicates with a second MS located within an outer area of the cell during the first time period in FDD, and an RS detects signals transmitted between the BS and the second MS during the first time period and transmits the detected signals simultaneously to the BS and the second MS during the second time period.

摘要翻译： 提供了一种用于在通信系统中发送和接收信号的系统和方法，其中，在TDD中的第一和第二时间段期间，BS与位于小区的内部区域内的第一MS进行通信，并且与位于 FDD中的第一时间段期间的小区外部区域，并且RS在第一时间段期间检测在BS与第二MS之间发送的信号，并且在第二时间段期间将检测到的信号同时发送到BS和第二MS。

公开(公告)号：US07680156B2

公开(公告)日：2010-03-16

申请号：US10582636

申请日：2004-09-08

申请人： Soo-Jung Jung ,  Kwang-Soon Kim ,  Byung-Han Ryu

发明人： Soo-Jung Jung ,  Kwang-Soon Kim ,  Byung-Han Ryu

IPC分类号： H04J3/12

CPC分类号： H04W72/1294 ,  H04J11/0026 ,  H04L1/1671 ,  H04L5/023 ,  H04L27/261 ,  H04W72/048 ,  H04W72/14 ,  H04W74/002 ,  H04W74/006 ,  H04W74/0833 ,  H04W74/0866

摘要： Disclosed is a random access data transmission system and method using OFDMA. The system includes a scheduling ID into an access grant on a preamble for a random access, and transmits it together with an acknowledgment or a non-acknowledgment of the preamble, a base station uses the scheduling ID to notify the mobile station of a random access data transmittable time and a data transmission channel through a control channel, and the mobile station transmits a preamble in advance. After receiving a transmission assignment instruction corresponding to a scheduling ID through the control channel, the mobile station transmits random access data through an assigned channel.

摘要翻译： 公开了使用OFDMA的随机接入数据传输系统和方法。 该系统将调度ID包括在用于随机接入的前同步码上的接入许可中，并与前导码的确认或不确认一起发送，基站使用调度ID向移动台通知随机接入 数据发送时间和通过控制信道的数据传输信道，并且移动台预先发送前同步码。 在通过控制信道接收到与调度ID相对应的发送分配指令之后，移动站通过分配的信道发送随机接入数据。

公开(公告)号：US07643566B2

公开(公告)日：2010-01-05

申请号：US11401484

申请日：2006-04-11

申请人： Jong-Yoon Hwang ,  Kwang-Soon Kim ,  Keum-Chan Whang

发明人： Jong-Yoon Hwang ,  Kwang-Soon Kim ,  Keum-Chan Whang

IPC分类号： H04K1/10

CPC分类号： H04L27/2657 ,  H04L27/2676

摘要： An apparatus and method for estimating a frequency offset in an Orthogonal Frequency Division Multiplexing (OFDM) system are provided. Two time domain signals are generated from one received OFDM symbol through two observation windows with different delay times. The two time domain signals are compensated for a candidate frequency offset. A discrete Fourier transform process and a phase compensation process in a frequency domain are performed. A difference between two frequency domain signals compensated for a phase difference is computed with respect to each candidate frequency offset. For all candidate frequency offsets, difference values are compared with each other. A candidate frequency offset mapped to a minimum difference value is detected as an optimal frequency offset. The frequency offset can be more exactly estimated without consuming a bandwidth and increasing hardware complexity of a receiver.

摘要翻译： 提供了一种用于估计正交频分复用（OFDM）系统中的频率偏移的装置和方法。 通过具有不同延迟时间的两个观察窗从一个接收的OFDM符号生成两个时域信号。 对候选频率偏移补偿两个时域信号。 执行频域中的离散付里叶变换处理和相位补偿处理。 针对每个候选频率偏移计算补偿相位差的两个频域信号之间的差异。 对于所有候选频率偏移量，将差值进行比较。 映射到最小差值的候选频率偏移被检测为最佳频率偏移。 可以更精确地估计频率偏移，而不消耗带宽并增加接收机的硬件复杂度。

公开(公告)号：US07542504B2

公开(公告)日：2009-06-02

申请号：US10532734

申请日：2002-11-26

申请人： Kyung-Hi Chang ,  Kwang-Soon Kim ,  Yong-Soo Cho ,  Suk-Won Ha

发明人： Kyung-Hi Chang ,  Kwang-Soon Kim ,  Yong-Soo Cho ,  Suk-Won Ha

IPC分类号： H04B1/00 ,  H04B1/66

CPC分类号： H04L5/0044 ,  H04B1/713 ,  H04B1/7136 ,  H04B1/7143 ,  H04B2001/71367 ,  H04B2001/7154 ,  H04L1/0025 ,  H04L5/0007 ,  H04L5/0048 ,  H04L25/0226 ,  H04L27/2613 ,  H04L27/2628 ,  H04L27/2657

摘要： Method for providing frequency-hopping OFDMA using symbols of comb patter, the method including the steps of: a) assigning frequency domain signal X(k) of comb pattern (comb symbol, k is frequency index) to modulated data sequence, the comb symbol comprising predetermined number of sub carriers (sub carrier group) which are placed with predetermined interval in the whole available frequency band; b) getting the comb symbol hopped for the comb symbol to have independent frequency offset; and c) inverse fast fourier transforming the comb symbol to time domain signal x(n) (n is time index) and transmitting the signal.

摘要翻译： 一种用于使用梳状图案符号提供跳频OFDMA的方法，所述方法包括以下步骤：a）将梳状模式（梳状符号，k为频率索引）的频域信号X（k）分配给调制数据序列，梳状符号 包括在整个可用频带中以预定间隔放置的预定数量的子载波（子载波组）; b）使梳状符号跳转的梳状符号具有独立的频率偏移; 和c）将梳状符号逆向快速傅立叶变换成时域信号x（n）（n是时间索引）并发送信号。

公开(公告)号：US20060146867A1

公开(公告)日：2006-07-06

申请号：US10539166

申请日：2003-06-02

申请人： Lok-kyu Lee ,  Kwang-Soon Kim ,  Kyung-Hi Chang

发明人： Lok-kyu Lee ,  Kwang-Soon Kim ,  Kyung-Hi Chang

IPC分类号： H04Q7/20 ,  H04J3/16 ,  H04J3/22 ,  H04J11/00

CPC分类号： H04J11/0026 ,  H04L1/0618 ,  H04L5/0023 ,  H04L5/0046 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/006 ,  H04L5/0085 ,  H04L5/06 ,  H04L25/0204 ,  H04L25/0226 ,  H04L27/2602

摘要： Disclosed are an adaptive pilot symbol assignment method that flexibly controls the number of transmit antennas according to each user's moving speed, channel status, or user request, and assigns proper pilot symbols in the downlink of an OFDMA (Orthogonal Frequency Division Multiplexing Access) based cellular system; and a sub-carrier allocation method for high-speed mobile that allocates some sub-carriers to assign proper pilot symbols for ultrahigh-speed mobile users, and the rest of the sub-carriers to the other users to assign proper pilot symbols to the users, on the assumption that the ultrahigh-speed mobile users have a traffic volume almost insignificant to the whole traffic volume.

摘要翻译： 公开了一种根据每个用户的移动速度，信道状态或用户请求灵活地控制发射天线数量的自适应导频符号分配方法，并且在基于OFDMA（正交频分复用接入）的蜂窝小区的下行链路中分配适当的导频符号 系统; 以及用于高速移动的子载波分配方法，其分配一些子载波以为超高速移动用户分配适当的导频符号，并且将剩余的子载波分配给其他用户以向用户分配适当的导频符号 假设超高速移动用户的流量对整个流量几乎无关紧要。

公开(公告)号：US20060072649A1

公开(公告)日：2006-04-06

申请号：US10532734

申请日：2002-11-26

申请人： Kyung-Hi Chang ,  Kwang-Soon Kim ,  Yong-Soo Cho ,  Suk-Won Ha

发明人： Kyung-Hi Chang ,  Kwang-Soon Kim ,  Yong-Soo Cho ,  Suk-Won Ha

IPC分类号： H04B1/713 ,  H04K1/10

CPC分类号： H04L5/0044 ,  H04B1/713 ,  H04B1/7136 ,  H04B1/7143 ,  H04B2001/71367 ,  H04B2001/7154 ,  H04L1/0025 ,  H04L5/0007 ,  H04L5/0048 ,  H04L25/0226 ,  H04L27/2613 ,  H04L27/2628 ,  H04L27/2657

摘要： Method for providing frequency-hopping OFDMA using symbols of comb patter, the method including the steps of: a) assigning frequency domain signal X(k) of comb pattern (comb symbol, k is frequency index) to modulated data sequence, the comb symbol comprising predetermined number of sub carriers (sub carrier group) which are placed with predetermined interval in the whole available frequency band; b) getting the comb symbol hopped for the comb symbol to have independent frequency offset; and c) inverse fast fourier transforming the comb symbol to time domain signal x(n) (n is time index) and transmitting the signal.

公开(公告)号：US08259644B2

公开(公告)日：2012-09-04

申请号：US12098168

申请日：2008-04-04

申请人： Jin-Ghoo Choi ,  Sung-Yoon Jung ,  Sang-Boh Yun ,  Kwang-Soon Kim ,  Young-Jin Sang ,  Jin-Bae Park ,  Seong-Lyun Kim

发明人： Jin-Ghoo Choi ,  Sung-Yoon Jung ,  Sang-Boh Yun ,  Kwang-Soon Kim ,  Young-Jin Sang ,  Jin-Bae Park ,  Seong-Lyun Kim

IPC分类号： H04B7/212

CPC分类号： H04W72/048

摘要： A method and apparatus for transmitting and receiving data in a Base Station (BS) of a communication system are provided. A controller determines a location of a Mobile Station (MS), and determines a transmission/reception scheme for data transmission and reception to/from the MS according to the location of the MS. A transceiver transmits and receives data to/from the MS using the determined transmission/reception scheme. Preferably, the MS is located in any one of a cell's inner region and a cell's outer region, the cell's inner region has a radius which varies according to interference between adjacent cells, and the cell's outer region is a region defined by excepting the cell's inner region from the entire cell region.

摘要翻译： 提供了一种用于在通信系统的基站（BS）中发送和接收数据的方法和装置。 控制器确定移动台（MS）的位置，并且根据MS的位置确定用于向/从MS的数据发送和接收的发送/接收方案。 收发机使用确定的发送/接收方案向/从MS发送和从MS接收数据。 优选地，MS位于单元的内部区域和单元的外部区域中的任一个中，单元的内部区域具有根据相邻单元之间的干扰而变化的半径，并且单元的外部区域是除了单元的内部 区域。

公开(公告)号：US08117516B2

公开(公告)日：2012-02-14

申请号：US11935259

申请日：2007-11-05

申请人： Dong-Ho Kim ,  Yung-Soo Kim ,  Tak-Ki Yu ,  Keum-Chan Whang ,  Kwang-Soon Kim ,  Hyo-Yol Park

发明人： Dong-Ho Kim ,  Yung-Soo Kim ,  Tak-Ki Yu ,  Keum-Chan Whang ,  Kwang-Soon Kim ,  Hyo-Yol Park

IPC分类号： H03M13/00

CPC分类号： H03M13/1102 ,  H03M13/033 ,  H03M13/6393

摘要： A method and an apparatus for transmitting a signal in a communication system are provided. An information vector is encoded according to a Low Density Parity Check (LDPC) encoding scheme, thereby generating an LDPC codeword. Minimum surviving check nodes are reserved for recovery of punctured nodes in the LDPC codeword. A check node is selected having a smallest cost function from among unreserved check nodes. A variable node is selected being unpunctured and having a smallest cost function from among variable nodes connected to the selected check node. The selected variable node is punctured when the selected variable node is not connected to the reserved check node. A stopping set check is performed when the selected variable node is connected to the reserved check node. The variable node is punctured when the stopping set check has been successfully performed. The check node is selected until there remains no variable node to be punctured and puncturing the variable node.

摘要翻译： 提供了一种用于在通信系统中发送信号的方法和装置。 根据低密度奇偶校验（LDPC）编码方案对信息向量进行编码，从而生成LDPC码字。 保留最小存活检查节点用于恢复LDPC码字中的穿孔节点。 从未预留的校验节点中选择具有最小成本函数的校验节点。 从连接到所选择的校验节点的变量节点中选择变量节点是未穿刺的并且具有最小的成本函数。 当所选择的变量节点未连接到保留的校验节点时，所选择的变量节点被打孔。 当所选变量节点连接到保留校验节点时，执行停止集检查。 当成功执行停止设置检查时，变量节点被打孔。 选中校验节点，直到不存在要删除的变量节点并对该变量节点进行删截。

公开(公告)号：US20070140178A1

公开(公告)日：2007-06-21

申请号：US10582636

申请日：2004-09-08

申请人： Soo-Jung Jung ,  Kwang-Soon Kim ,  Byung-Han Ryu

发明人： Soo-Jung Jung ,  Kwang-Soon Kim ,  Byung-Han Ryu

IPC分类号： H04B7/216

CPC分类号： H04W72/1294 ,  H04J11/0026 ,  H04L1/1671 ,  H04L5/023 ,  H04L27/261 ,  H04W72/048 ,  H04W72/14 ,  H04W74/002 ,  H04W74/006 ,  H04W74/0833 ,  H04W74/0866

摘要： Disclosed is a random access data transmission system and method using OFDMA. The system includes a scheduling ID into an access grant on a preamble for a random access, and transmits it together with an acknowledgment or a non-acknowledgment of the preamble, a base station uses the scheduling ID to notify the mobile station of a random access data transmittable time and a data transmission channel through a control channel, and the mobile station transmits a preamble in advance. After receiving a transmission assignment instruction corresponding to a scheduling ID through the control channel, the mobile station transmits random access data through an assigned channel.

摘要翻译： 公开了使用OFDMA的随机接入数据传输系统和方法。 该系统将调度ID包括在用于随机接入的前同步码上的接入许可中，并与前导码的确认或不确认一起发送，基站使用调度ID向移动台通知随机接入 数据发送时间和通过控制信道的数据传输信道，并且移动台预先发送前同步码。 在通过控制信道接收到与调度ID相对应的发送分配指令之后，移动站通过分配的信道发送随机接入数据。

公开(公告)号：US20060239368A1

公开(公告)日：2006-10-26

申请号：US11401484

申请日：2006-04-11

申请人： Jong-Yoon Hwang ,  Kwang-Soon Kim ,  Keum-Chan Whang

发明人： Jong-Yoon Hwang ,  Kwang-Soon Kim ,  Keum-Chan Whang

IPC分类号： H04K1/10

CPC分类号： H04L27/2657 ,  H04L27/2676

摘要： An apparatus and method for estimating a frequency offset in an Orthogonal Frequency Division Multiplexing (OFDM) system are provided. Two time domain signals are generated from one received OFDM symbol through two observation windows with different delay times. The two time domain signals are compensated for a candidate frequency offset. A discrete Fourier transform process and a phase compensation process in a frequency domain are performed. A difference between two frequency domain signals compensated for a phase difference is computed with respect to each candidate frequency offset. For all candidate frequency offsets, difference values are compared with each other. A candidate frequency offset mapped to a minimum difference value is detected as an optimal frequency offset. The frequency offset can be more exactly estimated without consuming a bandwidth and increasing hardware complexity of a receiver.

摘要翻译： 提供了一种用于估计正交频分复用（OFDM）系统中的频率偏移的装置和方法。 通过具有不同延迟时间的两个观察窗从一个接收的OFDM符号生成两个时域信号。 对候选频率偏移补偿两个时域信号。 执行频域中的离散付里叶变换处理和相位补偿处理。 针对每个候选频率偏移计算补偿相位差的两个频域信号之间的差异。 对于所有候选频率偏移量，将差值进行比较。 映射到最小差值的候选频率偏移被检测为最佳频率偏移。 可以更精确地估计频率偏移，而不消耗带宽并增加接收机的硬件复杂度。