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    • 4. 发明申请
    • ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING CODE DIVISION MULTIPLE ACCESS SYSTEM
    • 正交频分多路复用代码多路访问系统
    • WO2006102403A3
    • 2007-11-15
    • PCT/US2006010385
    • 2006-03-22
    • INTERDIGITAL TECH CORPTSAI YINGMINGZHANG GUODONGPAN JUNG-LIN
    • TSAI YINGMINGZHANG GUODONGPAN JUNG-LIN
    • H04L27/28
    • H04B1/711H04L5/026H04L2025/03414
    • 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.
    • 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子载波中的一个。 对映射到子载波的码片执行逆离散付里叶变换,并将循环前缀(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。 对所接收的数据流执行离散付里叶变换,并执行均衡。 去扩展器对均衡器的输出进行解扩以恢复发送的数据。
    • 8. 发明申请
    • WIRELESS COMMUNICATION METHOD AND APPARATUS FOR SELECTING A SERVING CELL AND NODE-B IN AN SC-FDMA SYSTEM
    • 用于在SC-FDMA系统中选择服务小区和节点B的无线通信方法和设备
    • WO2007025003A2
    • 2007-03-01
    • PCT/US2006033007
    • 2006-08-23
    • INTERDIGITAL TECH CORPZHANG GUODONGPAN JUNG-LINTSAI YINGMING
    • ZHANG GUODONGPAN JUNG-LINTSAI YINGMING
    • H04J1/00
    • H04W36/30H04B2201/70702H04L1/0026H04L5/023H04L27/2601H04W36/08H04W92/04
    • A method and apparatus for selecting a serving cell/Node-B in a single carrier frequency division multiple access (SC-FDMA) system are disclosed. For intra-Node-B serving cell selection, a serving Node-B measures channel quality indicators (CQIs) of each subcarrier block in an uplink of each cell controlled by the serving Node-B and selects a new serving cell based on the CQIs. The serving Node-B reports the selected new serving cell to a wireless transmit/receive unit (WTRU). For inter-Node-B serving cell selection, each of a plurality of Node-Bs measures a CQI of each of a plurality of subcarrier blocks in an uplink transmission in each cell controlled by each Node-B and forwards the CQIs to a serving cell selection entity. The serving cell selection entity selects a new serving cell/Node-B based on the CQIs. The serving cell selection entity may be a centralized access gateway, a current serving Node-B or a WTRU.
    • 公开了一种用于在单载波频分多址(SC-FDMA)系统中选择服务小区/节点B的方法和设备。 对于节点B内的服务小区选择,服务节点B测量由服务节点B控制的每个小区的上行链路中的每个子载波块的信道质量指示符(CQI),并且基于CQI选择新的服务小区。 服务节点B将选择的新服务小区报告给无线发射/接收单元(WTRU)。 对于节点B间服务小区选择,多个节点B中的每一个测量由每个节点B控制的每个小区中的上行链路传输中的多个子载波块中的每一个的CQI,并且将CQI转发到服务小区 选择实体。 服务小区选择实体基于CQI选择新的服务小区/节点B. 服务小区选择实体可以是集中式接入网关,当前服务节点B或WTRU。