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    • 64. 发明申请
    • METHODS FOR TRANSMITTING A FRAME IN A MULTI-USER BASED WIRELESS COMMUNICATION SYSTEM
    • 在多用户无线通信系统中发送帧的方法
    • US20120230242A1
    • 2012-09-13
    • US13478069
    • 2012-05-22
    • Yun-Joo KimJae-Seung LeeSok-Kyu Lee
    • Yun-Joo KimJae-Seung LeeSok-Kyu Lee
    • H04W4/06
    • H04B7/0452H04W4/08H04W8/186H04W84/12
    • The present invention relates to methods for transmitting a frame by grouping a plurality of wireless terminals in a multiuser based wireless communication system. The present invention includes a method for transmitting a frame by including information about multiple receiver terminals in a MAC frame, another method for transmitting a frame by allocating group addresses and then using a corresponding group address for frame transmission, and yet another method for transmitting a frame by using a unique group sequence number that is allocated to each group and group control information that contains bitmap information. The group control information is included in a destination address field of a MAC layer, or in a signal field of a physical layer, or in both the MAC layer and the physical layer.
    • 本发明涉及通过在多用户无线通信系统中对多个无线终端进行分组来发送帧的方法。 本发明包括一种通过在MAC帧中包含关于多个接收机终端的信息来发送帧的方法,用于通过分配组地址然后使用相应的组地址进行帧传输来发送帧的另一种方法,以及另一种用于发送帧 帧,通过使用分配给每个组的唯一组序列号和包含位图信息的组控制信息。 组控制信息包括在MAC层的目的地地址字段中,或者在物理层的信号字段中,或MAC层和物理层中。
    • 68. 发明授权
    • QR decomposition apparatus and method for MIMO system
    • 用于MIMO系统的QR分解装置和方法
    • US08068560B2
    • 2011-11-29
    • US12139904
    • 2008-06-16
    • Yu-Ro LeeJung-Bo SonMinho CheongSok-Kyu Lee
    • Yu-Ro LeeJung-Bo SonMinho CheongSok-Kyu Lee
    • H04L27/14H04L1/02
    • H04B7/0413H04B7/0854H04L27/2601
    • Provided is a QR decomposition apparatus and method that can reduce the number of computers by sharing hardware in an MIMO system employing OFDM technology to simplify a structure of hardware. The QR decomposition apparatus includes a norm multiplier for calculating a norm; a Q column multiplier for calculating a column value of a unitary Q matrix to thereby produce a Q matrix vector; a first storage for storing the Q matrix vector calculated in the Q column multiplier; an R row multiplier for calculating a value of an upper triangular R matrix by multiplying the Q matrix vector by a reception signal vector; and a Q update multiplier for receiving the reception signal vector and an output of the R row multiplier, calculating an Q update value through an accumulation operation, and providing the Q update value to the Q column multiplier to calculate a next Q matrix vector.
    • 提供了一种QR分解装置和方法,其可以通过在采用OFDM技术的MIMO系统中共享硬件来减少计算机的数量,以简化硬件的结构。 QR分解装置包括用于计算范数的标准倍数; Q列乘法器,用于计算酉矩阵的列值,从而产生Q矩阵向量; 用于存储在Q列乘法器中计算出的Q矩阵向量的第一存储器; R行乘法器,用于通过将Q矩阵向量乘以接收信号向量来计算上三角形R矩阵的值; 以及Q更新乘法器,用于接收接收信号矢量和R行乘法器的输出,通过累加操作计算Q更新值,并将Q更新值提供给Q列乘法器以计算下一个Q矩阵向量。
    • 70. 发明申请
    • METHOD AND APPARATUS FOR TRANSMITTING TRAINING SEQUENCE IN MULTI USER WIRELESS COMMUNICATION SYSTEM
    • 用于多用户无线通信系统中传输训练序列的方法与装置
    • US20110255488A1
    • 2011-10-20
    • US13035105
    • 2011-02-25
    • Yu-Ro LEESok-Kyu Lee
    • Yu-Ro LEESok-Kyu Lee
    • H04W72/04
    • H04L5/0048H04L5/0023H04L25/0226H04L25/0228H04W24/00H04W28/06
    • An apparatus of transmitting a long training field includes: a station number determination unit configured to determine at least one station to be transmitted using transmission data or channel status information; a transmission stream allocation unit configured to determine the number of transmission streams for each of the least one station determined by the station number determination unit; a long training field number calculation unit configured to calculate the number of long training fields required for each of the at least one station determined by the transmission stream allocation unit and determines the least common multiple of the number of calculated long training fields of each station; and a long training field allocation unit configured to allocate the long training fields for each station to subcarriers allocated to each station to correspond to the least common multiple of the determined long training fields.
    • 发送长训练场的装置包括:站号确定单元,被配置为使用发送数据或信道状态信息确定要发送的至少一个站; 发送流分配单元,被配置为确定由所述站号确定单元确定的所述至少一个站中的每一个的传输流的数量; 长训练场号计算单元,被配置为计算由所述传输流分配单元确定的所述至少一个站中的每一个所需的长训练场的数量,并确定每个站的计算的长训练场数的最小公倍数; 以及长训练场分配单元,被配置为将每个站的长训练场分配给分配给每个站的子载波以对应于所确定的长训练场的最小公倍数。