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    Dynamic subchannel and bit allocation in a multiuser-MIMO/OFDMA system
    1.
    发明申请
    Dynamic subchannel and bit allocation in a multiuser-MIMO/OFDMA system 有权
    多用户MIMO / OFDMA系统中的动态子信道和比特分配

    公开(公告)号：US20050254457A1

    公开(公告)日：2005-11-17

    申请号：US11130484

    申请日：2005-05-17

    申请人： Young-Ho Jung ,  In-Soon Park ,  Seung-Hoon Nam ,  In-Hyoung Kim ,  Yong-Hoon Lee

    发明人： Young-Ho Jung ,  In-Soon Park ,  Seung-Hoon Nam ,  In-Hyoung Kim ,  Yong-Hoon Lee

    IPC分类号： H04J11/00 ,  H04L1/06 ,  H04L5/02 ,  H04L27/26 ,  H04Q7/00

    CPC分类号： H04L1/06 ,  H04L1/0003 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0026 ,  H04L5/0037 ,  H04L5/0046 ,  H04L5/006 ,  H04L5/0064 ,  H04L5/0096

    摘要： A resource allocation method in a multiuser-multiple-input multiple-output/orthogonal frequency division multiple access (MIMO/OFDMA) system. In the multiuser-MIMO/OFDMA system feedback information is received from terminals. A channel gain and a transmission rate for each user are determined using the feedback information. An average channel gain for each user is computed according to the channel gain. The average number of bits for each user is determined according to the average channel gain. The number of subchannels for each user is computed according to the average number of bits for each user. At least one subchannel is allocated to each user according to the number of subchannels for each user. A modulation scheme for each of the at least one subchannel is determined. The resource allocation method adaptively allocates subchannels and bits according to channel environment, thereby considerably improving frequency use efficiency as well as a power gain.

    摘要翻译： 一种多用户多输入多输出/正交频分多址（MIMO / OFDMA）系统中的资源分配方法。 在多用户MIMO / OFDMA系统中，从终端接收反馈信息。 使用反馈信息确定每个用户的信道增益和传输速率。 根据通道增益计算每个用户的平均通道增益。 根据平均通道增益确定每个用户的平均位数。 根据每个用户的平均位数来计算每个用户的子信道数量。 根据每个用户的子信道数量，至少一个子信道被分配给每个用户。 确定对于至少一个子信道中的每一个的调制方案。 资源分配方法根据信道环境自适应地分配子信道和比特，从而显着提高频率使用效率以及功率增益。

    Dynamic subchannel and bit allocation in a multiuser-MIMO/OFDMA system
    2.
    发明授权
    Dynamic subchannel and bit allocation in a multiuser-MIMO/OFDMA system 有权
    多用户MIMO / OFDMA系统中的动态子信道和比特分配

    公开(公告)号：US07372830B2

    公开(公告)日：2008-05-13

    申请号：US11130484

    申请日：2005-05-17

    申请人： Young-Ho Jung ,  In-Soon Park ,  Seung-Hoon Nam ,  In-Hyoung Kim ,  Yong-Hoon Lee

    发明人： Young-Ho Jung ,  In-Soon Park ,  Seung-Hoon Nam ,  In-Hyoung Kim ,  Yong-Hoon Lee

    IPC分类号： H04Q7/00 ,  H04Q7/28 ,  H04Q7/24 ,  H04B7/204 ,  H04B7/208 ,  H04B7/02 ,  H04B7/10 ,  H04M1/00

    CPC分类号： H04L1/06 ,  H04L1/0003 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0026 ,  H04L5/0037 ,  H04L5/0046 ,  H04L5/006 ,  H04L5/0064 ,  H04L5/0096

    摘要： A resource allocation method in a multiuser-multiple-input multiple-output/orthogonal frequency division multiple access (MIMO/OFDMA) system. In the multiuser-MIMO/OFDMA system feedback information is received from terminals. A channel gain and a transmission rate for each user are determined using the feedback information. An average channel gain for each user is computed according to the channel gain. The average number of bits for each user is determined according to the average channel gain. The number of subchannels for each user is computed according to the average number of bits for each user. At least one subchannel is allocated to each user according to the number of subchannels for each user. A modulation scheme for each of the at least one subchannel is determined. The resource allocation method adaptively allocates subchannels and bits according to channel environment, thereby considerably improving frequency use efficiency as well as a power gain.

    摘要翻译： 一种多用户多输入多输出/正交频分多址（MIMO / OFDMA）系统中的资源分配方法。 在多用户MIMO / OFDMA系统中，从终端接收反馈信息。 使用反馈信息确定每个用户的信道增益和传输速率。 根据通道增益计算每个用户的平均通道增益。 根据平均通道增益确定每个用户的平均位数。 根据每个用户的平均位数来计算每个用户的子信道数量。 根据每个用户的子信道数量，至少一个子信道被分配给每个用户。 确定对于至少一个子信道中的每一个的调制方案。 资源分配方法根据信道环境自适应地分配子信道和比特，从而显着提高频率使用效率以及功率增益。

    Method for allocating subchannels in an OFDMA mobile communication system
    3.
    发明授权
    Method for allocating subchannels in an OFDMA mobile communication system 有权
    在OFDMA移动通信系统中分配子信道的方法

    公开(公告)号：US07411924B2

    公开(公告)日：2008-08-12

    申请号：US10996699

    申请日：2004-11-24

    申请人： Yoon-Ok Cho ,  Yong-Hoon Lee ,  Young-Ho Jung ,  Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Jae-Hak Chung ,  Chang-Soo Hwang ,  Seung-Hoon Nam

    发明人： Yoon-Ok Cho ,  Yong-Hoon Lee ,  Young-Ho Jung ,  Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Jae-Hak Chung ,  Chang-Soo Hwang ,  Seung-Hoon Nam

    IPC分类号： H04Q7/24

    CPC分类号： H04L5/023 ,  H04L1/0003 ,  H04L1/0015 ,  H04L27/2608

    摘要： An adaptive modulation scheme relating to an RA problem for maximizing the transmission rates of all users for maximum transmission rates in an OFDMA system including some users requiring to use services at fixed data rates. The scheme proposes introduction of an adaptive modulation using linear programming into an existing scheme for a system including a single kind of users, thereby enabling simultaneous execution of the adaptive modulation for all users in a system including two kinds of users. Further, the invention proposes another scheme of sequentially allocating subchannels to the users when the fixed transmission rate has a sufficiently small value, in order to reduce the complexity.

    摘要翻译： 一种与RA问题有关的自适应调制方案，用于在包括一些需要以固定数据速率的业务的用户的OFDMA系统中最大化所有用户的最大传输速率的传输速率。 该方案提出了使用线性规划的自适应调制引入到包括单一用户的系统的现有方案中，从而能够在包括两种用户的系统中为所有用户同时执行自适应调制。 此外，为了降低复杂度，本发明提出了当固定传输速率具有足够小的值时向用户顺序分配子信道的另一方案。

    Pilot designing method in an uplink OFDMA system
    9.
    发明授权
    Pilot designing method in an uplink OFDMA system 有权
    上行OFDMA系统中的导频设计方法

    公开(公告)号：US07710918B2

    公开(公告)日：2010-05-04

    申请号：US11078157

    申请日：2005-03-11

    申请人： Young-Ho Jung ,  Jae-Hak Chung ,  Chan-Soo Hwang ,  Seung-Hoon Nam ,  Yong-Hoon Lee ,  Hong-Sun Park

    发明人： Young-Ho Jung ,  Jae-Hak Chung ,  Chan-Soo Hwang ,  Seung-Hoon Nam ,  Yong-Hoon Lee ,  Hong-Sun Park

    IPC分类号： H04W4/00

    CPC分类号： H04L5/0048 ,  H04L5/0023 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/0232

    摘要： A pilot designing method in an uplink OFDMA system is provided. In the uplink OFDMA system, communications are carried out in a frame divided into time-frequency lattices, and each time-frequency lattice includes a plurality of data symbol periods and a plurality of pilot symbol periods intermittently arranged with respect to the data symbol periods. The frame is divided into a plurality of blocks. The blocks are allocated to the terminals. A predetermined allocated pilot time-frequency lattice is shared between adjacent terminals.

    摘要翻译： 提供了一种上行链路OFDMA系统中的导频设计方法。 在上行链路OFDMA系统中，以划分为时频格点的帧进行通信，并且每个时间频率格子包括相对于数据符号周期间歇地布置的多个数据符号周期和多个导频符号周期。 该帧被分成多个块。 这些块分配给终端。 在相邻的终端之间共享预定的分配的导频时间频率点阵。

    ICI cancellation method for an OFDM system
    10.
    发明授权
    ICI cancellation method for an OFDM system 有权
    OFDM系统的ICI消除方法

    公开(公告)号：US07433419B2

    公开(公告)日：2008-10-07

    申请号：US10973372

    申请日：2004-10-26

    申请人： Jae-Yeun Yun ,  Yong-Hoon Lee ,  Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Ho-Jin Kim ,  Chan-Soo Hwang ,  Seung-Hoon Nam

    发明人： Jae-Yeun Yun ,  Yong-Hoon Lee ,  Eung-Sun Kim ,  Jong-Hyeuk Lee ,  Ho-Jin Kim ,  Chan-Soo Hwang ,  Seung-Hoon Nam

    IPC分类号： H04K1/02 ,  H04L25/03 ,  H04L25/49 ,  H03K9/00 ,  H04L27/00

    CPC分类号： H04L27/2647 ,  H04L25/0228

    摘要： In the ICI cancellation method for OFDM communication system, a receiver performs channel estimation using pilot subcarriers included in transmission signals transmitted from at least one transmitter. The transmitter generates the transmission signal in which pilot subcarriers and data subcarriers are regularly arranged, performs preceding on the transmission signal, modulates the pre-coded transmission signal into an OFDM symbol, and transmits the OFDM symbol. The receiver receives the OFDM symbol; demodulates the OFDM symbol, detects the pilot subcarriers from a demodulated signal, estimates channels using the pilot subcarriers, and restores the transmission signal using the estimated channels.

    摘要翻译： 在OFDM通信系统的ICI取消方法中，接收机使用从至少一个发射机发送的发送信号中包含的导频子载波来执行信道估计。 发射机产生导频子载波和数据子载波规则排列的传输信号，在传输信号之前执行，将预编码的传输信号调制为OFDM符号，并发送OFDM符号。 接收机接收OFDM符号; 解调OFDM符号，从解调信号中检测导频子载波，使用导频子载波估计信道，并使用所估计的信道来恢复发送信号。