公开(公告)号：US20090196362A1

公开(公告)日：2009-08-06

申请号：US12304291

申请日：2006-09-28

申请人： Myung-Sun Song ,  Sung-Hyun Hwang ,  Gwang-Zeen Ko ,  Kyung-Hi Chang ,  Sung-Ho Park ,  Sang-Jun Ko ,  Joo Heo ,  Jung-Ju Kim

发明人： Myung-Sun Song ,  Sung-Hyun Hwang ,  Gwang-Zeen Ko ,  Kyung-Hi Chang ,  Sung-Ho Park ,  Sang-Jun Ko ,  Joo Heo ,  Jung-Ju Kim

IPC分类号： H04L27/28

CPC分类号： H04L5/0058 ,  H04B7/0408 ,  H04L1/0003 ,  H04L1/0009 ,  H04L5/0023 ,  H04L5/0032 ,  H04L5/0037 ,  H04L5/0046

摘要： Provided are a transmission method and apparatus for allocating a subchannel and forming a stationary beam to maximize transmission efficiency in an OFDMA based wireless communication system. The method includes determining the subchannel for the equipment of each user based on the channel state of the equipment of each user, determining a beam index for the equipment of each user, based on location information and direction of arrival information of the equipment of each user, generating an OFDM symbol by mapping a modulation symbol corresponding to the equipment of each user to the determined subchannel, and transmitting the generated OFDM symbol to a wireless space by forming a beam following the determined beam index. Using the method, the equipment of each user can be allocated with an advantageous subchannel, can remove an interference signal at low cost, and can increase total throughput of an OFDMA system downlink.

摘要翻译： 提供了一种用于分配子信道并形成固定波束以在基于OFDMA的无线通信系统中最大化传输效率的传输方法和装置。 该方法包括基于每个用户的设备的信道状态来确定每个用户的设备的子信道，基于每个用户的设备的位置信息和到达方向信息确定每个用户的设备的波束索引 通过将与每个用户的设备相对应的调制符号映射到所确定的子信道来生成OFDM符号，并且通过形成遵循所确定的波束索引的波束来将生成的OFDM符号发送到无线空间。 使用该方法，可以为每个用户的设备分配有利的子信道，可以以低成本去除干扰信号，并且可以增加OFDMA系统下行链路的总吞吐量。

公开(公告)号：US20080232320A1

公开(公告)日：2008-09-25

申请号：US12063933

申请日：2006-08-17

申请人： Hee-Soo Lee ,  Jae-Young Ahn ,  Kyung-Hi Chang ,  Joo Heo ,  In-Suk Cha

发明人： Hee-Soo Lee ,  Jae-Young Ahn ,  Kyung-Hi Chang ,  Joo Heo ,  In-Suk Cha

IPC分类号： H04Q7/00 ,  H04L27/28

CPC分类号： H04W16/10 ,  H04W28/22 ,  H04W72/0453

摘要： Provided are a dynamic resource allocation method based on frequency reuse partitioning for an Orthogonal Frequency Division Multiple Access (OFDMA) system, and a frame transmission method therefor. The dynamic resource allocation method includes: a) dividing a coverage into cells based on frequency reuse partitioning; b) selecting a candidate user to receive a channel allocated thereto based on the ratio; c) acquiring distance information for the candidate user; and d) checking whether the candidate user is in an inner or outer cell area based on the distance information. If the candidate user is in the inner cell area, a subchannel group among subchannel groups having a Frequency Reuse Factor (FRF) lower than a threshold value is selected and subcarriers of the selected subchannel group is allocated. If the candidate user is in the outer cell area, a subchannel group among subchannel groups having a FRF higher than the threshold value is selected.

摘要翻译： 提供了一种基于正交频分多址（OFDMA）系统的频率复用分割的动态资源分配方法及其帧传输方法。 动态资源分配方法包括：a）基于频率重用分区将覆盖划分为小区; b）基于所述比率选择候选用户以接收分配给其的信道; c）获取候选用户的距离信息; 以及d）基于距离信息来检查候选用户是否在内部或外部小区区域。 如果候选用户在内部小区区域，则选择具有低于阈值的频率重用因子（FRF）的子信道组之中的子信道组，并且分配所选择的子信道组的子载波。 如果候选用户在外部小区区域，则选择FRF高于阈值的子信道组之中的子信道组。

公开(公告)号：US08116780B2

公开(公告)日：2012-02-14

申请号：US12063933

申请日：2006-08-17

申请人： Hee-Soo Lee ,  Jae-Young Ahn ,  Kyung-Hi Chang ,  Joo Heo ,  In-Suk Cha

发明人： Hee-Soo Lee ,  Jae-Young Ahn ,  Kyung-Hi Chang ,  Joo Heo ,  In-Suk Cha

IPC分类号： H04W72/00

CPC分类号： H04W16/10 ,  H04W28/22 ,  H04W72/0453

摘要： Provided are a dynamic resource allocation method based on frequency reuse partitioning for an Orthogonal Frequency Division Multiple Access (OFDMA) system, and a frame transmission method therefor. The dynamic resource allocation method includes: a) dividing a coverage into cells based on frequency reuse partitioning; b) selecting a candidate user to receive a channel allocated thereto based on the ratio; c) acquiring distance information for the candidate user; and d) checking whether the candidate user is in an inner or outer cell area based on the distance information. If the candidate user is in the inner cell area, a subchannel group among subchannel groups having a Frequency Reuse Factor (FRF) lower than a threshold value is selected and subcarriers of the selected subchannel group is allocated. If the candidate user is in the outer cell area, a subchannel group among subchannel groups having a FRF higher than the threshold value is selected.

摘要翻译： 提供了一种基于正交频分多址（OFDMA）系统的频率复用分割的动态资源分配方法及其帧传输方法。 动态资源分配方法包括：a）基于频率重用分区将覆盖划分为小区; b）基于所述比率选择候选用户以接收分配给其的信道; c）获取候选用户的距离信息; 以及d）基于距离信息来检查候选用户是否在内部或外部小区区域。 如果候选用户在内部小区区域，则选择具有低于阈值的频率重用因子（FRF）的子信道组之中的子信道组，并且分配所选择的子信道组的子载波。 如果候选用户在外部小区区域，则选择FRF高于阈值的子信道组之中的子信道组。

公开(公告)号：US07123887B2

公开(公告)日：2006-10-17

申请号：US10723528

申请日：2003-11-25

申请人： Yun-Hee Kim ,  Kwang-Soon Kim ,  Sang-Hyun Lee ,  Kyu-Jong Hwang ,  Kyung-Hi Chang

发明人： Yun-Hee Kim ,  Kwang-Soon Kim ,  Sang-Hyun Lee ,  Kyu-Jong Hwang ,  Kyung-Hi Chang

IPC分类号： H04B1/02

CPC分类号： H04L1/0003 ,  H04B7/0417 ,  H04B7/0669 ,  H04B7/0689 ,  H04B7/0697 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/0026 ,  H04L1/0618 ,  Y02D70/1244 ,  Y02D70/142 ,  Y02D70/444

摘要： Disclosed is an adaptive transmit and receive method and device in a multiple-antenna wireless communication system. A transmit mode comprises different main transmit modes each of which includes one or both of a sub-transmit mode based on STBC and a sub-transmit mode based on SM. A receiver calculates an STBC performance parameter and a SM performance parameter, and a transmitter uses the parameters to determine a main transmit mode with maximum data rates and select a sub-transmit mode for minimizing power consumption. The transmitter channel-encodes, modulates and antenna-maps input data according to the selected transmit mode, and outputs results to the receiver. The receiver antenna/symbol-demodulates and channel-decodes the received data.

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：US20110059700A1

公开(公告)日：2011-03-10

申请号：US12874629

申请日：2010-09-02

申请人： Yun-Hee Kim ,  Kwang-Soon Kim ,  Sang-Hyun Lee ,  Kyu-Jong Hwang ,  Kyung-Hi Chang

发明人： Yun-Hee Kim ,  Kwang-Soon Kim ,  Sang-Hyun Lee ,  Kyu-Jong Hwang ,  Kyung-Hi Chang

IPC分类号： H04B7/00

CPC分类号： H04L1/0003 ,  H04B7/0417 ,  H04B7/0669 ,  H04B7/0689 ,  H04B7/0697 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/0026 ,  H04L1/0618 ,  Y02D70/1244 ,  Y02D70/142 ,  Y02D70/444

摘要： Disclosed is an adaptive transmit and receive method and device in a multiple-antenna wireless communication system. A transmit mode comprises different main transmit modes each of which includes one or both of a sub-transmit mode based on STBC and a sub-transmit mode based on SM. A receiver calculates an STBC performance parameter and a SM performance parameter, and a transmitter uses the parameters to determine a main transmit mode with maximum data rates and select a sub-transmit mode for minimizing power consumption. The transmitter channel-encodes, modulates and antenna-maps input data according to the selected transmit mode, and outputs results to the receiver. The receiver antenna/symbol-demodulates and channel-decodes the received data.

摘要翻译： 公开了一种在多天线无线通信系统中的自适应发射和接收方法和装置。 发送模式包括不同的主发送模式，每个发送模式包括基于STBC的子发送模式和基于SM的子发送模式中的一个或两个。 接收机计算STBC性能参数和SM性能参数，发射机使用参数来确定具有最大数据速率的主发射模式，并选择用于最小化功耗的子发射模式。 发射机根据选择的发射模式对输入数据进行信道编码，调制和天线映射，并将结果输出到接收机。 接收机天线/符号解调并对接收的数据进行通道解码。

公开(公告)号：US07460466B2

公开(公告)日：2008-12-02

申请号：US10539166

申请日：2003-06-02

申请人： Sok-Kyu Lee ,  Kwang-Soon Kim ,  Kyung-Hi Chang

发明人： Sok-Kyu Lee ,  Kwang-Soon Kim ,  Kyung-Hi Chang

IPC分类号： H04Q7/00

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：US08428524B2

公开(公告)日：2013-04-23

申请号：US13364991

申请日：2012-02-02

申请人： Yun-Hee Kim ,  Kwang-Soon Kim ,  Sang-Hyun Lee ,  Kyu-Jong Hwang ,  Kyung-Hi Chang

发明人： Yun-Hee Kim ,  Kwang-Soon Kim ,  Sang-Hyun Lee ,  Kyu-Jong Hwang ,  Kyung-Hi Chang

IPC分类号： H04B1/04 ,  H04B1/00 ,  H04B7/00 ,  H04B7/02 ,  H04L1/02

CPC分类号： H04L1/0003 ,  H04B7/0417 ,  H04B7/0669 ,  H04B7/0689 ,  H04B7/0697 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/0026 ,  H04L1/0618 ,  Y02D70/1244 ,  Y02D70/142 ,  Y02D70/444

摘要： Disclosed is an adaptive transmit and receive method and device in a multiple-antenna wireless communication system. A transmit mode comprises different main transmit modes each of which includes one or both of a sub-transmit mode based on STBC and a sub-transmit mode based on SM. A receiver calculates an STBC performance parameter and a SM performance parameter, and a transmitter uses the parameters to determine a main transmit mode with maximum data rates and select a sub-transmit mode for minimizing power consumption. The transmitter channel-encodes, modulates and antenna-maps input data according to the selected transmit mode, and outputs results to the receiver. The receiver antenna/symbol-demodulates and channel-decodes the received data.

摘要翻译： 公开了一种在多天线无线通信系统中的自适应发射和接收方法和装置。 发送模式包括不同的主发送模式，每个发送模式包括基于STBC的子发送模式和基于SM的子发送模式中的一个或两个。 接收机计算STBC性能参数和SM性能参数，发射机使用参数来确定具有最大数据速率的主发射模式，并选择用于最小化功耗的子发射模式。 发射机根据选择的发射模式对输入数据进行信道编码，调制和天线映射，并将结果输出到接收机。 接收机天线/符号解调并对接收的数据进行通道解码。