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    • 62. 发明申请
    • RADIO TRANSMITTING APPARATUS AND RADIO TRANSMITTING METHOD
    • 无线电发射装置和无线电发射方法
    • US20090245413A1
    • 2009-10-01
    • US12064698
    • 2006-08-25
    • Kenichi MiyoshiAkihiko NishioDaichi Imamura
    • Kenichi MiyoshiAkihiko NishioDaichi Imamura
    • H04L27/00H04L7/04
    • H04L27/2605H04L27/2607
    • A radio transmitting apparatus and a radio transmitting method wherein a guard interval having a variable length is used to allow a radio receiving apparatus to precisely and easily obtain a symbol synchronization. In the radio transmitting apparatus, a GI adding part (103) adds a short GI or a long GI, which is longer than the short GI, to the head of each of data parts into which a modulated signal outputted from a modulating part (102) has been put by a predetermined number of symbols. In a case of adding the short GI, the GI adding part (103) copies the symbols of a portion of the data part including the rear thereof, and adds the copied symbols to the head of that data part, thereby providing a GI. In a case of adding the long GI, the GI adding part (103) copies the symbols of a portion of a second data part, which immediately follows the first data part, including the rear of the second data part. Then, the GI adding part (103) adds the copied symbols to the head of the first data part, thereby providing the second GI. Moreover, the GI adding part (103) copies the symbols of a portion of the first data part including the rear thereof, and then adds the copied symbols to the head of the second GI added to the first data part, thereby providing the first GI.
    • 一种无线发送装置和无线发送方法,其中使用具有可变长度的保护间隔来允许无线电接收装置精确且容易地获得符号同步。 在无线发送装置中,GI附加部(103)将短GI(GI)或长GI(长GI)添加到从调制部(102)输出的调制信号的数据部分的头部 )已经被放置了预定数量的符号。 在添加短GI的情况下,GI附加部分(103)复制包括其后部的数据部分的一部分的符号,并将复制的符号添加到该数据部分的头部,从而提供GI。 在添加长GI的情况下,GI附加部分(103)复制紧跟在第一数据部分之后的包括第二数据部分的后部的第二数据部分的一部分的符号。 然后,GI添加部分(103)将复制的符号添加到第一数据部分的头部,从而提供第二GI。 此外,GI附加部(103)将包含其后部的第一数据部分的一部分的符号复制,然后将复制的符号与添加到第一数据部分的第二GI的头相加,从而提供第一GI 。
    • 64. 发明申请
    • MULTI-CARRIER COMMUNICATION DEVICE AND MULTI-CARRIER COMMUNICATION METHOD
    • 多载波通信设备和多载波通信方法
    • US20090036135A1
    • 2009-02-05
    • US11909404
    • 2006-03-27
    • Hidenori MatsuoAkihiko NishioDaichi Imamura
    • Hidenori MatsuoAkihiko NishioDaichi Imamura
    • H04W36/32
    • H04L5/023H04L5/0007H04L5/0037H04L5/006H04L27/2601H04W36/06H04W48/08H04W48/16H04W72/085
    • There is provided a multi-carrier communication method capable of preventing lowering of a throughput of another mobile device accompanying allocation of a sub-carrier for a new mobile station device. This multi-carrier communication method can acquire reception quality information for one of the sub-carriers already allocated in an MS (150a) from a BS (100a) and for one of the sub-carriers which can be allocated in the MS (150a) from the BS (100b). According to the reception quality information, a release sub-carrier is selected from the sub-carriers already allocated and a new-allocation sub-carrier is selected from the sub-carriers which can be allocated. The new-allocation sub-carrier has a frequency different from the already-allocated sub-carriers excluding the release sub-carrier. The BS (100a) is instructed to release the selected release sub-carrier and the BS (100b) is instructed to allocate the selected new-allocation sub-carrier in the MS (150a).
    • 提供了一种能够防止伴随新移动站装置的子载波分配的其他移动装置的吞吐量的降低的多载波通信方法。 该多载波通信方法可以从BS(100a)以及可以在MS(150a)中分配的子载波之一中获取已经分配在MS(150a)中的一个子载波的接收质量信息, 从BS(100b)。 根据接收质量信息,从已经分配的子载波中选择一个释放副载波,并且从可以分配的子载波中选择一个新的分配子载波。 新分配子载波的频率不同于已经分配的子载波,不包括释放子载波。 指示BS(100a)释放所选择的释放子载波,并且指示BS(100b)在MS(150a)中分配所选择的新分配子载波。
    • 65. 发明申请
    • Transmitting/receiving apparatus and transmitting/receiving method
    • 发射/接收装置和发射/接收方法
    • US20070155323A1
    • 2007-07-05
    • US10586970
    • 2005-01-27
    • Atsushi MatsumotoSadaki FutagiAkihiko NishioDaichi Imamura
    • Atsushi MatsumotoSadaki FutagiAkihiko NishioDaichi Imamura
    • H04B7/24H04B1/034
    • H04L5/0048H04L5/0007H04L5/0044H04L5/006
    • A transmission/reception apparatus capable of preventing degradation in system capacity, improving system throughput, and minimizing power consumption of an apparatus is disclosed. In this apparatus, a propagation path determining section (131) determines a propagation path state in all the regions in the used frequency band of a received multicarrier signal based on propagation path estimation information such as a channel estimation value and the like calculated in a propagation path estimating section (126), and specifies a frequency region having a good propagation path state from the used frequency band of OFDM. More specifically, the used frequency band is divided into a plurality of frequency bands (subbands), each comprised of smaller predetermined bandwidth, and by selecting a subband having a good propagation path state in the propagation pathdetermining section (131), a frequency region having the good propagation path state is specified. A transmitting section (110) reports the subband information to a base station.
    • 公开了一种能够防止系统容量降低,提高系统吞吐量并使装置的功耗最小化的发送/接收装置。 在该装置中,传播路径确定部(131)基于传播路径估计信息,例如在传播中计算出的信道估计值等,来确定接收到的多载波信号的使用频带中的所有区域中的传播路径状态 路径估计部(126),并且从OFDM的所使用的频带指定具有良好的传播路径状态的频率区域。 更具体地,所使用的频带被划分为多个频带(子带),每个频带包括较小的预定带宽,并且通过在传播路径确定部分(131)中选择具有良好传播路径状态的子带,具有 指定良好的传播路径状态。 发送部分(110)将子带信息报告给基站。