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    Orthogonal frequency division multiplexing-code division multiple access system
    3.
    发明授权
    Orthogonal frequency division multiplexing-code division multiple access system 有权
    正交频分复用码分多址系统

    公开(公告)号：US08705641B2

    公开(公告)日：2014-04-22

    申请号：US12984101

    申请日：2011-01-04

    申请人： Yingming Tsai ,  Guodong Zhang ,  Jung-Lin Pan

    发明人： Yingming Tsai ,  Guodong Zhang ,  Jung-Lin Pan

    IPC分类号： H04L27/28 ,  H04B1/707

    CPC分类号： H04B1/711 ,  H04L5/026 ,  H04L2025/03414

    摘要： An orthogonal frequency division multiplexing (OFDM)-code division multiple access (CDMA) system is disclosed. The system includes a transmitter and a receiver. At the transmitter, a spreading and subcarrier mapping unit spreads an input data symbol with a complex quadratic sequence code to generate a plurality of chips and maps each chip to one of a plurality of subcarriers. An inverse discrete Fourier transform is performed on the chips mapped to the subcarriers and a cyclic prefix (CP) is inserted to an OFDM frame. A parallel-to-serial converter converts the time-domain data into a serial data stream for transmission. At the receiver, a serial-to-parallel converter converts received data into multiple received data streams and the CP is removed from the received data. A discrete Fourier transform is performed on the received data streams and equalization is performed. A despreader despreads an output of the equalizer to recover the transmitted data.

    摘要翻译： 公开了一种正交频分复用（OFDM）码分多址（CDMA）系统。 该系统包括发射机和接收机。 在发射机处，扩展和副载波映射单元利用复数二次序列码扩展输入数据符号，以产生多个码片，并将每个码片映射到多个副载波中的一个。 对映射到子载波的芯片执行逆离散傅立叶变换，并且将循环前缀（CP）插入到OFDM帧中。 并行到串行转换器将时域数据转换为串行数据流以进行传输。 在接收机处，串并转换器将接收的数据转换成多个接收的数据流，并从接收的数据中移除CP。 对接收的数据流执行离散付里叶变换，并进行均衡。 去扩展器对均衡器的输出进行解扩以恢复发送的数据。

    Hybrid orthogonal frequency division multiple access WTRU and method
    4.
    发明授权
    Hybrid orthogonal frequency division multiple access WTRU and method 有权
    混合正交频分多址WTRU和方法

    公开(公告)号：US08340153B2

    公开(公告)日：2012-12-25

    申请号：US13236147

    申请日：2011-09-19

    申请人： Yingming Tsai ,  Guodong Zhang ,  Jung-Lin Pan

    发明人： Yingming Tsai ,  Guodong Zhang ,  Jung-Lin Pan

    IPC分类号： H04B1/00

    CPC分类号： H04L5/0007 ,  H04L5/0016 ,  H04L5/0037 ,  H04L5/0044 ,  H04L5/005 ,  H04L5/0073 ,  H04L27/2601 ,  H04L27/2647

    摘要： A hybrid orthogonal frequency division multiple access (OFDMA) wireless transmit/receive unit (WTRU) and method are disclosed. A WTRU includes a transmitter and a receiver. The receiver processes received data to recover data mapped to the subcarriers using OFDMA. The receiver recovers first input data by separating user data from multi-user spread data and recovers second input data from non-spread data.

    摘要翻译： 公开了一种混合正交频分多址（OFDMA）无线发射/接收单元（WTRU）和方法。 WTRU包括发射机和接收机。 接收机处理接收到的数据以恢复使用OFDMA映射到子载波的数据。 接收机通过从多用户扩展数据分离用户数据并从非扩展数据中恢复第二输入数据来恢复第一输入数据。

    Hybrid orthogonal frequency division multiple access system and method
    6.
    发明授权
    Hybrid orthogonal frequency division multiple access system and method 有权
    混合正交频分多址系统及方法

    公开(公告)号：US07715460B2

    公开(公告)日：2010-05-11

    申请号：US11406878

    申请日：2006-04-19

    申请人： Yingming Tsai ,  Guodong Zhang ,  Jung-Lin Pan

    发明人： Yingming Tsai ,  Guodong Zhang ,  Jung-Lin Pan

    IPC分类号： H04B1/00 ,  H04K1/10

    CPC分类号： H04L5/0007 ,  H04L5/0016 ,  H04L5/0037 ,  H04L5/0044 ,  H04L5/005 ,  H04L5/0073 ,  H04L27/2601 ,  H04L27/2647

    摘要： A hybrid orthogonal frequency division multiple access (OFDMA) system including a transmitter and a receiver is disclosed. The transmitter includes a first spread OFDMA subassembly, a first non-spread OFDMA subassembly and a first common subassembly. The first spread OFDMA subassembly spreads input data and maps the spread data to a first group of subcarriers. The first non-spread OFDMA subassembly maps input data to a second group of subcarriers. The first common subassembly transmits the input data mapped to the first and second group of subcarriers using OFDMA. The receiver includes a second spread OFDMA subassembly, a second non-spread OFDMA subassembly and a second common subassembly. The second common subassembly processes received data to recover data mapped to the subcarriers using OFDMA. The second spread OFDMA subassembly recovers the first input data by separating user data in a code domain and the second non-spread OFDMA subassembly recovers the second input data.

    摘要翻译： 公开了一种包括发射机和接收机的混合正交频分多址（OFDMA）系统。 发射机包括第一扩展OFDMA子组件，第一非扩展OFDMA子组件和第一公共子组件。 第一扩频OFDMA子组件扩展输入数据并将扩展数据映射到第一组子载波。 第一非扩展OFDMA子组件将输入数据映射到第二组副载波。 第一公共子组件使用OFDMA发送映射到第一和第二组子载波的输入数据。 接收机包括第二扩展OFDMA子组件，第二非扩展OFDMA子组件和第二公共子组件。 第二个公共子组件使用OFDMA来处理接收的数据以恢复映射到子载波的数据。 第二扩频OFDMA子组件通过分离码域中的用户数据并且第二非扩展OFDMA子组件恢复第二输入数据来恢复第一输入数据。

    Wireless communication method and apparatus for selecting cells in an OFDMA system
    8.
    发明授权
    Wireless communication method and apparatus for selecting cells in an OFDMA system 失效
    用于在OFDMA系统中选择小区的无线通信方法和装置

    公开(公告)号：US08503356B2

    公开(公告)日：2013-08-06

    申请号：US11478816

    申请日：2006-06-30

    申请人： Guodong Zhang ,  Jung-Lin Pan ,  Yingming Tsai

    发明人： Guodong Zhang ,  Jung-Lin Pan ,  Yingming Tsai

    IPC分类号： H04W80/04 ,  H04W36/18 ,  H04W88/06 ,  H04W36/30 ,  H04B1/707 ,  H04B1/08

    CPC分类号： H04L27/2601 ,  H04B7/26 ,  H04W36/08 ,  H04W36/30

    摘要： A wireless communication method and apparatus for selecting cells in an orthogonal frequency division multiple access (OFDMA) system are disclosed. A wireless transmit/receive unit (WTRU) measures a downlink path loss of a current serving cell and at least one other cell. The WTRU determines whether a path loss difference between the serving cell and the other cell is below a threshold. If the path loss difference is below the threshold, the WTRU measures a channel quality indicator (CQI) for each of the plurality of subcarrier blocks in the downlink of the current serving cell and the other cell, respectively. The WTRU reports the CQIs to a serving Node-B which selects a new cell based on the CQIs. Alternatively, a centralized access gateway (aGW) may select the new serving cell/Node-B, or the cell selection decision made by the serving Node-B may be forwarded to another Node-B via the centralized aGW.

    摘要翻译： 公开了一种用于在正交频分多址（OFDMA）系统中选择小区的无线通信方法和装置。 无线发射/接收单元（WTRU）测量当前服务小区和至少一个其他小区的下行链路路径损耗。 WTRU确定服务小区和另一小区之间的路径损耗差是否低于阈值。 如果路径损耗差低于阈值，则WTRU分别针对当前服务小区和另一个小区的下行链路中的多个子载波块中的每一个分别测量信道质量指示符（CQI）。 WTRU向基于CQI选择新小区的服务节点B报告CQI。 或者，集中接入网关（aGW）可以选择新的服务小区/节点B，或者由服务节点B做出的小区选择决定可以经由集中式aGW被转发到另一节点B。

    MIMO BEAMFORMING-BASED SINGLE CARRIER FREQUENCY DIVISION MULTIPLE ACCESS SYSTEM
    9.
    发明申请
    MIMO BEAMFORMING-BASED SINGLE CARRIER FREQUENCY DIVISION MULTIPLE ACCESS SYSTEM 失效
    基于MIMO射频的单载波频分多址接入系统

    公开(公告)号：US20100246377A1

    公开(公告)日：2010-09-30

    申请号：US12377975

    申请日：2006-09-25

    申请人： Guodong Zhang ,  Jung-Lin Pan ,  Robert Lind Olesen ,  Yingming Tsai

    发明人： Guodong Zhang ,  Jung-Lin Pan ,  Robert Lind Olesen ,  Yingming Tsai

    IPC分类号： H04J11/00

    CPC分类号： H04B7/0417 ,  H04B7/0617 ,  H04B7/086 ,  H04L5/023 ,  H04L25/0248 ,  H04L27/2601 ,  H04L27/2614 ,  H04L27/2647

    摘要： A multiple-input multiple-output (MIMO) beamforming-based single carrier frequency division multiple access (SC-FDMA) system is disclosed. At the transmitter, a fast Fourier transform (FFT) is performed on transmission data to generate frequency domain data. The frequency domain transmit data is mapped to assigned subcarriers. An inverse fast Fourier transform (IFFT) is performed on the transmit data mapped to the assigned subcarriers to generate time domain transmit data. The time domain transmit data is transmitted via antennas. At a receiver, an FFT is performed on the received data to generate frequency domain received data. Subcarrier demapping is performed to extract data mapped on the assigned subcarriers. A channel estimator generates a channel matrix which is decomposed into U, D and VH matrices. A channel distortion and interference between transmit and receive antennas are equalized based on the decomposed channel matrices to the extracted frequency domain received data.

    摘要翻译： 公开了一种基于多输入多输出（MIMO）波束成形的单载波频分多址（SC-FDMA）系统。 在发射机上，对传输数据进行快速傅里叶变换（FFT）以产生频域数据。 频域发射数据被映射到分配的子载波。 对映射到所分配的子载波的发送数据执行快速傅里叶逆变换（IFFT），以生成时域发送数据。 时域发送数据通过天线发送。 在接收机处，对接收到的数据执行FFT以产生频域接收的数据。 执行子载波解映射以提取映射在所分配的子载波上的数据。 信道估计器生成分解为U，D和VH矩阵的信道矩阵。 基于分解的信道矩阵到提取的频域接收数据，发送和接收天线之间的信道失真和干扰被均衡。

    Frequency domain joint detection for wireless communication systems
    10.
    发明授权
    Frequency domain joint detection for wireless communication systems 有权
    无线通信系统的频域联合检测

    公开(公告)号：US07548577B2

    公开(公告)日：2009-06-16

    申请号：US11441881

    申请日：2006-05-26

    申请人： Jung-Lin Pan ,  Yingming Tsai ,  Guodong Zhang

    发明人： Jung-Lin Pan ,  Yingming Tsai ,  Guodong Zhang

    IPC分类号： H04B1/00

    CPC分类号： H04L25/03159 ,  H04B1/71055 ,  H04L5/026 ,  H04L25/03331 ,  H04L2025/03414

    摘要： A method and apparatus for frequency domain joint detection for multicarrier code division multiple access (MC-CDMA) and spread orthogonal frequency division multiple access (OFDMA) systems are disclosed. The apparatus includes a receiver having a frequency domain joint detector, whereby channel distortion and data symbols are jointly equalized and detected by the frequency domain joint detector in a frequency domain. Users of the data symbols may be assigned all or a subset of subcarriers with variable spreading factor codes. Alternatively, the subset of subcarriers may be further divided into multiple partitions and the frequency domain joint detection may be performed on the subcarriers in the partition. The users are assigned a spreading code, which may be a Hadamard code, a spread complex quadratic sequence (SCQS) code or any type of orthogonal spreading code.

    摘要翻译： 公开了一种用于多载波码分多址（MC-CDMA）和扩频正交频分多址（OFDMA）系统的频域联合检测的方法和装置。 该装置包括具有频域联合检测器的接收机，由此频域联合检测器在频域中共同平衡和检测信道失真和数据符号。 数据符号的用户可以分配具有可变扩展因子代码的全部或一部分子载波。 或者，子载波的子集可以进一步划分为多个分区，并且可以在分区中的子载波上执行频域联合检测。 用户被分配一个扩展码，其可以是Hadamard码，扩展复数二次序列（SCQS）码或任何类型的正交扩展码。