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    • 91. 发明授权
    • Method and system for generating shared information
    • 生成共享信息的方法和系统
    • US07616765B2
    • 2009-11-10
    • US11261669
    • 2005-10-31
    • Wakako MaedaAkio TajimaAkihiro Tanaka
    • Wakako MaedaAkio TajimaAkihiro Tanaka
    • H04K1/00H04L9/00
    • H04L9/0852H04L2209/34
    • A sender sends original random-number data to a receiver through a quantum channel. The receiver generates a raw key from information received through the quantum channel and notifies the received information to the sender. The sender performs received-bit comparison and basis reconciliation based on the received information and provisionally shares a sifted key with the receiver. The receiver sends part of its version of the sifted key to the sender, by which an error rate is calculated. The calculated error rate is compared with a predetermined threshold value for bit position synchronization determination. When the calculated error rate is larger, the sender notifies the receiver that bit position synchronization is not established. The receiver reassigns bit numbers to the sifted key, and received-bit comparison and basis reconciliation are performed again. This procedure is repeated until the calculated error rate becomes smaller than the threshold value.
    • 发送者通过量子信道向接收者发送原始随机数数据。 接收机通过量子信道接收到的信息生成原始密钥,并将接收到的信息通知发送方。 发送者根据接收到的信息执行接收比特比较和基础协调,并临时与接收者共享筛选密钥。 接收方将其筛选密钥的一部分版本发送给发送方,由此计算错误率。 计算的误差率与用于位位置同步确定的预定阈值进行比较。 当计算出的错误率较大时,发送方通知接收端位位置同步不成立。 接收器将位号重新分配到筛选的密钥,并且再次执行接收比特比较和基础协调。 重复该过程,直到计算的误差率变得小于阈值。
    • 92. 发明授权
    • Multiplexing communication system and crosstalk elimination method
    • 多路复用通信系统和串扰消除方法
    • US07613396B2
    • 2009-11-03
    • US11217319
    • 2005-09-02
    • Wakako MaedaAkio TajimaAkihiro Tanaka
    • Wakako MaedaAkio TajimaAkihiro Tanaka
    • H04J14/02H04B10/12
    • H04B10/70
    • In a system where a quantum channel and a classical channel are multiplexed on a single optical transmission line and information is transmitted from a transmitter to a receiver through the quantum channel, the classical channel is inhibited from affecting the quantum channel. To this end, the transmission characteristics of a transmitter-side wavelength multiplexer/demultiplexer for the classical channel, the transmission characteristics of a receiver-side wavelength multiplexer/demultiplexer for the quantum channel, and the optical power of a light source for the classical channel are designed so that crosstalk light due to spontaneous emission light and crosstalk light due to nonlinear optical effects can be suppressed, and the classical channel does not affect the quantum channel.
    • 在量子信道和经典信道被复用在单个光传输线上并且信息通过量子信道从发射机发射到接收机的系统中,禁止经典信道影响量子信道。 为此,用于经典信道的发射机侧波长多路复用器/解复用器的传输特性,用于量子信道的接收机侧波长多路复用器/解复用器的传输特性以及用于经典信道的光源的光功率 被设计成可以抑制由于非线性光学效应引起的自发发射光和串扰光的串扰光,并且经典通道不影响量子通道。
    • 94. 发明申请
    • UNIVERSAL-HASH-FUNCTION-FAMILY CALCULATION UNIT AND SHARED-KEY GENERATION SYSTEM
    • 通用 - 功能 - 功能 - 家庭计算单元和共享密钥生成系统
    • US20090240913A1
    • 2009-09-24
    • US12067618
    • 2006-09-07
    • Satoshi ObanaAkihiro Tanaka
    • Satoshi ObanaAkihiro Tanaka
    • G06F12/08
    • H04L9/0662H04L9/0838H04L9/0852H04L2209/34
    • An input data enlarging unit (100) derives a first enlargement unit output and a second enlargement unit output that are uniquely specified by input data (103) to output the same. The first enlargement unit output and the second enlargement unit output are elements of output data set B which forms a group. An ε-Δ hash function calculation unit (101) receives as input the first enlargement unit output to calculate an hΔ function which is specified by hash-function-specifying data (104) and an element of the HΔ function set. The function set HΔ is such that the number of h∈H Δ which satisfies h(x)−h(y)=d for an arbitrary element d of the output data set B and two different elements x and y of the output data set B is equal to or smaller than |HΔ|·ε. An adding unit (102) adds together the result of calculation of the function HΔ and the second enlargement unit output to output a result of the addition.
    • 输入数据放大单元(100)导出由输入数据(103)唯一指定的第一放大单元输出和第二放大单元输出,以输出它们。 第一放大单元输出和第二放大单元输出是形成组的输出数据组B的元件。 ε-Δ散列函数计算单元(101)接收作为输入的第一放大单元输出,以计算由哈希函数指定数据(104)指定的hDelta函数和HDelta函数集的元素。 函数集HDelta是对于输出数据组B的任意元素d满足h(x)-h(y)= d的h∈HDelta的数量和输出数据集合的两个不同元素x和y的数量 B等于或小于| HDelta | .epsilon。 添加单元(102)将功能HDelta和第二放大单元输出的计算结果相加,输出相加结果。
    • 95. 发明授权
    • Transmission method, transmitter-receiver, and transmitting-receiving system
    • 传输方式,发射机和发射接收系统
    • US07580634B2
    • 2009-08-25
    • US10971047
    • 2004-10-25
    • Takeshi TakeuchiAkio TajimaShigekazu HaradaAkihiro TanakaWakako Maeda
    • Takeshi TakeuchiAkio TajimaShigekazu HaradaAkihiro TanakaWakako Maeda
    • H04B10/08
    • H04B10/077H04B10/07955
    • A transmitter-receiver having a means for automatically determining the status of transmission medium such as optical fiber, and a means for automatically setting and resetting the transmission rate and/or output power according to the status of the transmission medium, a transmission loss and gain measurement method, and a transmitting-receiving system. A transmitter-receiver comprises at least: an output power controller for controlling the output power of a transmitter; an input power measuring section for measuring the strength of input signals; and an information processor for deriving the loss or gain of a path to change the output power of the transmitter and/or the rate of data transmission according to the derived loss or gain of the path. A transmission loss and gain measurement method applied to a system comprising transmission media and a plurality of the transmitter-receivers connected via the transmission media, comprises the steps of: transmitting information on the output power of a first transmitter-receiver from the first transmitter-receiver to a second transmitter-receiver; measuring reception strength by the second transmitter-receiver when the second transmitter-receiver receives the output power information; reading the output power information by the second transmitter-receiver; and comparing the reception strength with the output power information to calculate a transmission loss or gain by the second transmitter-receiver.
    • 具有用于自动确定诸如光纤的传输介质的状态的装置的发射机 - 接收机,以及根据传输介质的状态自动设置和重置传输速率和/或输出功率的装置,传输损耗和增益 测量方法和发送接收系统。 发射机 - 接收机至少包括:用于控制发射机的输出功率的输出功率控制器; 用于测量输入信号的强度的输入功率测量部分; 以及信息处理器,用于根据导出的路径损失或增益导出用于改变发射机的输出功率的路径的损失或增益和/或数据传输速率。 一种应用于包括通过传输介质连接的传输介质和多个发射机 - 接收机的系统的传输损耗和增益测量方法包括以下步骤:从第一发射机 - 接收机发送关于第一发射机 - 接收机的输出功率的信息, 接收机到第二发射机 - 接收机; 当第二发射机 - 接收机接收到输出功率信息时,测量第二发射机 - 接收机的接收强度; 通过第二发射机 - 接收机读取输出功率信息; 以及将接收强度与输出功率信息进行比较,以计算第二发射机 - 接收机的传输损耗或增益。
    • 97. 发明授权
    • Card adapter
    • 卡适配器
    • US07416451B2
    • 2008-08-26
    • US12001785
    • 2007-12-12
    • Akihiro TanakaYasuo Nakai
    • Akihiro TanakaYasuo Nakai
    • H01R24/00
    • H01R31/06G06K7/0021H01R12/714H01R13/2442H01R13/5045H01R13/514H01R13/6583H01R43/24Y10S439/945
    • A card adapter comprises a main body (50) having an insertion slot (51) into which a memory card (M) is inserted; a first contact member (10) having first contact points (11) for contacting a first array of electrodes (M1) and first connecting portions (12) to be connected to a connector with base portions (13) located between the first contact points (11) and the first connecting portions (12); a second contact member (20) having second contact points (21) for contacting a second array of electrodes (M2) and second connecting portions (22) to be connected to a connector with base portions (23) located between the second contact points (21) and the second connecting portions (22); the first contact member (10) and the second contact member (20) being arranged within the main body (50) in such a way that the first contact points (11) and the second contact points (21) are located at different positions in a direction to which the memory card (M) is inserted.
    • 卡适配器包括具有插入槽(51)的主体(50),存储卡(M)插入其中; 具有用于接触第一电极阵列(M1)和第一连接部分(12)的第一接触点(11)的第一接触部件(10),所述第一接触点与第一接触点 (11)和第一连接部分(12); 第二接触构件(20),具有用于接触第二电极阵列(M2)和第二连接部分(22)的第二接触点(21),以连接到具有位于第二接触点之间的基部(23)的连接器 (21)和第二连接部分(22); 所述第一接触构件(10)和所述第二接触构件(20)以所述第一接触点(11)和所述第二接触点(21)位于所述主体(50)内的不同位置 插入存储卡(M)的方向。
    • 100. 发明授权
    • Lens actuator, optical pickup unit and optical disk apparatus
    • 透镜致动器,光学拾取单元和光盘装置
    • US07102966B2
    • 2006-09-05
    • US10671612
    • 2003-09-29
    • Akihiro Tanaka
    • Akihiro Tanaka
    • G11B7/095
    • G11B7/0935G11B7/0933G11B7/0956
    • A lens actuator includes a lens holder to support an objective lens and having a pair of first side surfaces in a tracking direction and a pair of second side surfaces in a tangential direction, a fixed magnet disposed to confront the second side surface and comprising four regions having approximately the same area and are magnetic, such that magnetic directions of the four regions are perpendicular to a plane including a focusing direction and the tracking direction but are in opposite directions between two mutually adjacent regions, a pair of tracking coils disposed between the second surface and the magnet and having centers located on an outer side of corresponding centers of the four regions in the tracking direction, a focusing coil disposed between the second surface and the magnet and having a center located on an outer side of corresponding centers of the four regions in the focusing direction, and a radial tilt coil disposed between the second surface and the magnet and having a center located on an outer side of corresponding centers of the four regions in the focusing direction.
    • 透镜致动器包括:透镜保持器,用于支撑物镜并具有在跟踪方向上的一对第一侧表面和沿切线方向的一对第二侧表面;固定磁铁,设置成面对第二侧表面并且包括四个区域 具有大致相同的面积并且是磁性的,使得四个区域的磁方向垂直于包括聚焦方向和跟踪方向的平面,但是在两个相互相邻的区域之间处于相反的方向,一对跟踪线圈设置在第二 表面和磁体,并且具有位于跟踪方向上的四个区域的对应中心的外侧上的中心,设置在第二表面和磁体之间的聚焦线圈,并且具有位于四个区域的相应中心的外侧的中心 聚焦方向的区域和设置在第二表面和磁体之间的径向倾斜线圈 位于沿聚焦方向的四个区域的对应中心的外侧的中心。