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    Receiving apparatus and transmitting apparatus
    42.
    发明授权
    Receiving apparatus and transmitting apparatus 有权
    接收装置和发送装置

    公开(公告)号：US07715504B2

    公开(公告)日：2010-05-11

    申请号：US10580398

    申请日：2004-11-04

    申请人： Yutaka Murakami ,  Kiyotaka Kobayashi ,  Masayuki Orihashi ,  Akihiko Matsuoka

    发明人： Yutaka Murakami ,  Kiyotaka Kobayashi ,  Masayuki Orihashi ,  Akihiko Matsuoka

    IPC分类号： H04L27/06 ,  H03M13/03

    CPC分类号： H04L1/06 ,  H04B7/0413 ,  H04B7/0854 ,  H04L1/0054 ,  H04L1/006 ,  H04L1/007 ,  H04L25/03305 ,  H04L25/03324 ,  H04L25/03891 ,  H04L25/061 ,  H04L27/3488 ,  H04L27/38 ,  H04L2025/03611 ,  H04N19/39

    摘要： A partial bit demodulation section demodulates partial bits among a plurality of bits that form one symbol of each modulated signal using a detection method different from likelihood detection. Signal point reduction sections reduce the number of candidate signal points using demodulated partial bits. A likelihood detection section obtains received digital signals by performing likelihood detection based on the Euclidian distances between the reduced candidate signal points and a reception point. Only some bits which are unlikely to be erroneous are found by the partial bit demodulation section, and other bits can be found by the likelihood detection section, enabling bit error rate performances to be effectively improved with a comparatively small computational complexity.

    摘要翻译： 部分位解调部分使用与似然检测不同的检测方法解调形成每个调制信号的一个符号的多个比特中的部分比特。 信号点减少部分使用解调的部分比特减少候选信号点的数量。 似然度检测部通过基于缩小候补信号点与接收点之间的欧几里德距离进行似然度检测来获得接收数字信号。 只有部分比特解调部分才能发现一些不太可能出错的比特，可以通过似然度检测部分找到其他比特，从而能够以较小的计算复杂度有效提高误码率性能。

    TRANSMISSION METHOD, TRANSMITTER APPARATUS AND RECEPTION METHOD
    43.
    发明申请
    TRANSMISSION METHOD, TRANSMITTER APPARATUS AND RECEPTION METHOD 有权
    传输方法，发射机装置和接收方法

    公开(公告)号：US20100070828A1

    公开(公告)日：2010-03-18

    申请号：US12447885

    申请日：2007-11-01

    申请人： Yutaka Murakami ,  Shutai Okamura ,  Kiyotaka Kobayashi ,  Masayuki Orihashi ,  Kazuaki Takahashi

    发明人： Yutaka Murakami ,  Shutai Okamura ,  Kiyotaka Kobayashi ,  Masayuki Orihashi ,  Kazuaki Takahashi

    IPC分类号： H03M13/05 ,  G06F11/10

    CPC分类号： H04L1/0071 ,  H03M13/15 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0059 ,  H04L1/22 ,  H04L5/0007 ,  H04L27/0008 ,  H04L27/2647 ,  H04L27/36 ,  H04L27/38

    摘要： A transmitter apparatus wherein a simple structure is used to successfully suppress the degradation of error rate performance that otherwise would be caused by fading or the like. There are included encoding parts (11—1-11—4) that encode transport data; a mapping part (3304) that performs such a mapping that encoded data sequentially formed by the encoding parts (11—1-11—4) are not successively included in the same symbol, thereby forming data symbols; and a symbol interleaver (3301) that interleaves the data symbols. In this way, a low computational complexity can be used to perform an interleaving process equivalent to a bit interleaving process to effectively improve the reception quality at a receiving end.

    摘要翻译： 一种发射机装置，其中使用简单的结构来成功地抑制否则将由衰落等引起的误码率性能的降级。 包括编码传输数据的编码部分（11-1-11-4）; 执行编码由编码部分（11-1-11-4）顺序形成的数据的映射的映射部分（3304）不被连续地包括在相同的符号中，从而形成数据符号; 以及交错数据符号的符号交织器（3301）。 以这种方式，可以使用低的计算复杂度来执行等同于比特交织处理的交织处理，以有效地提高接收端的接收质量。

    MULTI-ANTENNA TRANSMISSION DEVICE, MULTI-ANTENNA RECEPTION DEVICE, MULTI-ANTENNA TRANSMISSION METHOD, MULTI-ANTENNA RECEPTION METHOD, TERMINAL DEVICE, AND BASE STATION DEVICE
    44.
    发明申请
    MULTI-ANTENNA TRANSMISSION DEVICE, MULTI-ANTENNA RECEPTION DEVICE, MULTI-ANTENNA TRANSMISSION METHOD, MULTI-ANTENNA RECEPTION METHOD, TERMINAL DEVICE, AND BASE STATION DEVICE 有权
    多天线发射装置，多天线接收装置，多天线发射方法，多天线接收方法，终端装置和基站装置

    公开(公告)号：US20100046658A1

    公开(公告)日：2010-02-25

    申请号：US12523481

    申请日：2008-01-21

    申请人： Naoya Yosoku ,  Yutaka Murakami

    发明人： Naoya Yosoku ,  Yutaka Murakami

    IPC分类号： H04B7/02 ,  H04B1/06 ,  H04L27/00

    CPC分类号： H04B7/0689 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L5/0023 ,  H04L25/0224 ,  H04L25/03343 ,  H04L27/368 ,  H04L2025/03426

    摘要： Provided is a multi-antenna transmission device (400) which can perform MLD by using a simple configuration of a reception device in a MIMO-AMC system. The multi-antenna transmission device (400) includes common signal point mapping units (401, 402) for mapping data transmitted from different antennas (111, 112) in transmission scheme using MIMO spatial multiplexing, to common signal points shared by respective modulation methods. Thus, the arrangement of baseband signal points obtained by mapping a code word after channel encoding onto an IQ plane can be shared as common signal points shared by modulation methods. Accordingly, the reception device need not prepare a particular circuit for performing MLD calculation in accordance with a combination of the methods for modulating the signals which have been MIMO-space multiplexed. This can reduce the circuit size of the MLD calculation circuit.

    摘要翻译： 提供一种可以通过使用MIMO-AMC系统中的接收装置的简单配置来执行MLD的多天线发送装置（400）。 多天线发送装置（400）包括用于将使用MIMO空间复用的传输方案中的不同天线（111,112）发送的数据映射到由各个调制方式共享的公共信号点的公共信号点映射单元（401,402）。 因此，通过将通道编码之后的码字映射到IQ平面上而获得的基带信号点的布置可以被共享为由调制方法共享的公共信号点。 因此，接收装置不需要根据用于调制已被MIMO空间多路复用的信号的方法的组合来准备用于执行MLD计算的特定电路。 这可以减少MLD计算电路的电路尺寸。

    PILOT SIGNAL TRANSMISSION TECHNIQUE AND DIGITAL COMMUNICATION SYSTEM USING SAME
    47.
    发明申请
    PILOT SIGNAL TRANSMISSION TECHNIQUE AND DIGITAL COMMUNICATION SYSTEM USING SAME 审中-公开
    引导信号传输技术和数字通信系统

    公开(公告)号：US20080240289A1

    公开(公告)日：2008-10-02

    申请号：US12132817

    申请日：2008-06-04

    申请人： Yutaka Murakami ,  Masayuki Orihashi ,  Akihiko Matsuoka ,  Morikazu Sagawa

    发明人： Yutaka Murakami ,  Masayuki Orihashi ,  Akihiko Matsuoka ,  Morikazu Sagawa

    IPC分类号： H04L27/36

    CPC分类号： H04L27/3455

    摘要： In a digital communication system such as a mobile radio system, fading distortion is compensated with a raised precision. In a transmitter, pilot signals are regularly inserted in the information signals. The amplitude of the pilot signals are set larger than the maximum possible amplitude of the information signals. The modulation scheme of the pilot signals may be different from that of the information signals. In a receiver, the fading distortion of each of the pilot signals is determined. The fading distortions of the information signals are estimated by interpolation using the determined fading distortion of the pilot signal, and then compensated. The frequency band of each information signal is preferably limited with a roll-off filter with a roll-off coefficient ranging from 0.1 to 0.4.

    摘要翻译： 在诸如移动无线电系统的数字通信系统中，以提高的精度补偿衰落失真。 在发射机中，导频信号被定期插入信息信号中。 导频信号的幅度被设定为大于信息信号的最大可能幅度。 导频信号的调制方式可能与信息信号的调制方式不同。 在接收机中，确定每个导频信号的衰落失真。 通过使用确定的导频信号的衰落失真的内插来估计信息信号的衰落失真，然后进行补偿。 每个信息信号的频带优选地通过具有从0.1到0.4的滚降系数的滚降滤波器来限制。

    Apparatus and method for digital wireless communications
    49.
    发明授权
    Apparatus and method for digital wireless communications 有权
    数字无线通信的装置和方法

    公开(公告)号：US07359454B2

    公开(公告)日：2008-04-15

    申请号：US10781839

    申请日：2004-02-20

    申请人： Yutaka Murakami ,  Shinichiro Takabayashi ,  Masayuki Orihashi ,  Akihiko Matsuoka

    发明人： Yutaka Murakami ,  Shinichiro Takabayashi ,  Masayuki Orihashi ,  Akihiko Matsuoka

    IPC分类号： H04L27/26 ,  H04L23/02 ,  H04B7/216

    CPC分类号： H04L7/04 ,  H04L7/06 ,  H04L27/0008 ,  H04L27/206 ,  H04L27/34 ,  H04L27/3405 ,  H04L27/3455 ,  H04L2027/0024 ,  H04L2027/0087 ,  H04L2027/0093

    摘要： A digital wireless communication apparatus includes a first modulator that modulates a pilot symbol according to a first modulation scheme, and a second modulator that modulates specific symbols according to a second modulation scheme, the second modulation scheme being different than the first modulation scheme. A third modulator modulates symbols other than the pilot symbol and the specific symbols according to a third modulation scheme, the third modulation scheme being different than the first and second modulation schemes. A timing controller controls timing such that the specific symbols are inserted immediately before and after the pilot symbol. The signal points of the specific symbols are allocated on an imaginary line that connects the origin point and a signal point of the pilot symbol on a signal space diagram.

    摘要翻译： 数字无线通信装置包括根据第一调制方案调制导频符号的第一调制器和根据第二调制方案调制特定符号的第二调制器，所述第二调制方案不同于第一调制方案。 第三调制器根据第三调制方案调制除导频符号和特定符号之外的符号，第三调制方案不同于第一和第二调制方案。 定时控制器控制定时，使得在导频符号之前和之后立即插入特定符号。 特定符号的信号点分配在连接信号空间图上的导频符号的原点和信号点的假想线上。

    Objective Lens Drive
    50.
    发明申请
    Objective Lens Drive 审中-公开
    物镜透镜

    公开(公告)号：US20080019025A1

    公开(公告)日：2008-01-24

    申请号：US11665560

    申请日：2005-08-05

    申请人： Yutaka Murakami ,  Hironori Tomita

    发明人： Yutaka Murakami ,  Hironori Tomita

    IPC分类号： G02B7/04

    CPC分类号： G11B7/0932

    摘要： An objective lens drive is provided which is capable of reducing a primary resonance frequency in the tracking direction while suppressing lowering of a buckling resonance frequency in the focus direction. In this objective lens drive: an objective lens secured to an objective lens holder is displaced relatively to a securing member in the focus direction and tracking direction through bending deformation of resilient supporting members; each resilient supporting member is provided with a trapezoidal portion in which the width in the tracking direction becomes narrower toward the end of the resilient supporting member; and the trapezoidal portion has a length of 27-50% of the effective length of the resilient deformation portion.

    摘要翻译： 提供一种物镜驱动器，其能够在抑制聚焦方向的屈曲共振频率的降低的同时降低跟踪方向上的主谐振频率。 在该物镜驱动中：固定到物镜支架的物镜通过弹性支撑构件的弯曲变形相对于固定构件在聚焦方向和跟踪方向上移位; 每个弹性支撑构件设置有梯形部分，跟踪方向上的宽度朝向弹性支撑构件的端部变窄; 并且所述梯形部分具有所述弹性变形部分的有效长度的27-50％的长度。