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    • 51. 发明授权
    • Rear suspension system for motorcycles
    • 摩托车后悬挂系统
    • US4489803A
    • 1984-12-25
    • US426258
    • 1982-09-29
    • Kiyoshi Fukuchi
    • Kiyoshi Fukuchi
    • B62K25/26B62K25/28B62K25/20
    • B62K25/286
    • A rear suspension system for motorcycles in which a front end of a rear wheel supporting member having the rear wheel supported thereby is connected to a chassis frame in such a manner as to permit oscillation thereof in an upward or downward direction, a damper having one end connected to the chassis frame is connected to the rear wheel supporting member at the other end thereof by a first link, and the chassis frame and the first link are connected by the second link. Due to an arrangement of the first link in which its longitudinal axis extends substantially in a vertical direction, a space occupied by the progressive link mechanism is made to be relatively small and thus it is possible to provide a sufficient space for units such as a battery and air cleaner and the like.
    • 一种用于摩托车的后悬挂系统,其中后支撑构件的前端由其支撑,后轮被支撑在底盘框架上,以便允许其向上或向下的方向振动;一个阻尼器,其一端 连接到底盘框架的另一端通过第一连杆连接到后轮支撑构件,并且底架框架和第一连杆通过第二连杆连接。 由于第一连杆的布置,其纵向轴线基本上在垂直方向上延伸,所以渐进连杆机构占据的空间相对较小,因此可以为诸如电池的单元提供足够的空间 和空气净化器等。
    • 53. 发明授权
    • Equalization signal processor, optical receiver including the same, and method for equalization signal processing
    • 均衡信号处理器,包括相同的光接收机以及均衡信号处理方法
    • US09160459B2
    • 2015-10-13
    • US14362784
    • 2011-12-07
    • Manabu ArikawaDaisaku OgasaharaEmmanuel Le Taillandier De GaboryKiyoshi Fukuchi
    • Manabu ArikawaDaisaku OgasaharaEmmanuel Le Taillandier De GaboryKiyoshi Fukuchi
    • H03H7/30H04B10/61H04B10/079
    • H04B10/6162H04B10/0795H04B10/616
    • It becomes difficult to perform the optimum equalization signal processing in coherent receiving systems if a channel response in an optical fiber transmission line includes a factor without temporal centrosymmetry, therefore, an equalization signal processor according to an exemplary aspect of the invention includes an equalization filter means configured to receive digital signals by coherent receiving systems; a coefficient control means configured to control coefficients defining characteristics of the equalization filter means; a significant coefficient holding means configured to hold significant coefficients of significant values among initial values of the coefficients; a significant coefficient positioning means configured to determine a significant coefficient position, a position of the significant coefficients in the initial values, so that equalization characteristics of the equalization filter means may be optimized; and a significant coefficient setting means configured to allocate the significant coefficients to the significant coefficient position.
    • 如果光纤传输线路中的信道响应包含没有时间中心对称性的因素,则在相干接收系统中执行最佳均衡信号处理变得困难,因此,根据本发明示例性方面的均衡信号处理器包括均衡滤波器装置 被配置为通过相干接收系统接收数字信号; 系数控制装置,被配置为控制限定所述均衡滤波器装置的特性的系数; 有效系数保持装置,被配置为在系数的初始值中保持有效值的有效系数; 确定有效系数位置的有效系数定位装置,初始值中有效系数的位置,使均衡滤波器装置的均衡特性可以被优化; 以及重要系数设定装置,被配置为将有效系数分配给有效系数位置。
    • 55. 发明申请
    • COHERENT OPTICAL RECEIVER, APPARATUS AND METHOD FOR DETECTING INTER-CHANNEL SKEW IN COHERENT OPTICAL RECEIVER
    • 相关的光接收机,检测相干光接收机中的通道间的方法
    • US20140140690A1
    • 2014-05-22
    • US14082875
    • 2013-11-18
    • Junichi ABEWakako YASUDAKiyoshi FUKUCHI
    • Junichi ABEWakako YASUDAKiyoshi FUKUCHI
    • H04B10/61H04B10/077
    • H04B10/616H04B10/0775H04B10/6164H04B10/6165
    • In a coherent optical receiver, sufficient demodulation becomes impossible and consequently receiving performance deteriorates if an inter-channel skew arises, therefore, a method for detecting inter-channel skew in a coherent optical receiver according to an exemplary aspect of the invention includes the steps of: outputting a plurality of optical signals separated into a plurality of signal components by making a test light from a test light source interfere with a local light from a local light source; detecting the optical signals and outputting detected electrical signals; quantizing the detected electrical signals and outputting quantized signals; performing a fast Fourier transform process on the quantized signals; and calculating a difference in propagation delay between the plurality of signal components on the basis of a plurality of peak values in the results of performing the fast Fourier transform process.
    • 在相干光接收机中,如果出现信道间偏移,则不能进行足够的解调,因此接收性能恶化,因此根据本发明的示例性方面的用于检测相干光接收机中的信道间偏移的方法包括以下步骤: 通过使来自测试光源的测试光与本地光源的局部光干扰而输出分离成多个信号分量的多个光信号; 检测光信号并输出​​检测到的电信号; 量化检测到的电信号并输出​​量化信号; 对量化信号执行快速傅立叶变换处理; 以及基于执行快速傅立叶变换处理的结果中的多个峰值来计算多个信号分量之间的传播延迟的差异。
    • 57. 发明申请
    • OPTICAL RECEIVER, POLARIZATION DEMULTIPLEXER, AND OPTICAL RECEIVING METHOD
    • 光接收器,极化解复用器和光接收方法
    • US20130336654A1
    • 2013-12-19
    • US14002266
    • 2012-02-28
    • Manabu ArikawaDaisaku OgasaharaEmmanuel Le Taillandier De GaboryKiyoshi Fukuchi
    • Manabu ArikawaDaisaku OgasaharaEmmanuel Le Taillandier De GaboryKiyoshi Fukuchi
    • H04J14/06
    • H04J14/06H04B10/614H04B10/6166
    • In order to appropriately demultiplex the polarization multiplexed BPSK signal without using a training sequence and decreasing the resistance to a frequency offset, an optical receiver includes a coherent optical detection unit receiving an optical signal in which BPSK modulated carrier waves are polarization-multiplexed, performing coherent detection by mixing the received optical signal with local light, and outputting first electrical signals corresponding to the carrier waves; a butterfly FIR filter receiving the first electrical signals and extracting second electrical signals corresponding to each of the carrier waves from the first electrical signals; and a coefficient control unit for calculating a sum of respective phases of the second electrical signals output from the butterfly FIR filter, adaptively controlling tap coefficients of the butterfly FIR filter so that the calculated phase sum may become equal to 0 or π, and outputting tap coefficients after being controlled to the butterfly FIR filter.
    • 为了适当地解复用偏振复用的BPSK信号而不使用训练序列并降低对频偏的电阻,光接收机包括相干光检测单元,其接收光信号,其中BPSK调制载波被偏振复用,执行相干 通过将接收的光信号与本地光混合来检测,并输出与载波对应的第一电信号; 蝶形FIR滤波器,接收第一电信号并从第一电信号中提取对应于每个载波的第二电信号; 以及系数控制单元,用于计算从蝶形FIR滤波器输出的第二电信号的各相的和,自适应地控制蝶形FIR滤波器的抽头系数,使得计算出的相位和可以变为等于0或pi,并输出抽头 系数被控制到蝴蝶FIR滤波器。
    • 60. 发明授权
    • Optical modulator and optical communication system
    • 光调制器和光通信系统
    • US08204387B2
    • 2012-06-19
    • US12682367
    • 2008-10-10
    • Kiyoshi Fukuchi
    • Kiyoshi Fukuchi
    • H04B10/04
    • H04B10/5053G02F1/21G02F2001/212H04B10/5055H04B10/5561
    • The optical modulator comprises an optical branching unit branching incident light into a first signal light and a second signal light; a first Mach-Zehnder modulator modulating the first signal light; a second Mach-Zehnder modulator modulating the second signal light; a phase shifter giving a fixed phase shift to the phase of the output light from the second Mach-Zehnder modulator; and an optical multiplexer multiplexing the output light from the first Mach-Zehnder modulator and the output light from the phase shifter. The phase shifter gives the phase shift so that the two input lights to the optical multiplexer have a phase difference of 60 degrees, and the first and second Mach-Zehnder modulators are driven by three-level signals.
    • 光调制器包括将入射光分为第一信号光和第二信号光的光分支单元; 调制第一信号光的第一马赫 - 曾德调制器; 调制第二信号光的第二马赫 - 曾德调制器; 移相器,其给出来自第二马赫 - 策德尔调制器的输出光的相位的固定相移; 以及多路复用来自第一马赫 - 曾德调制器的输出光和来自移相器的输出光的光复用器。 移相器给出相移,使得光复用器的两个输入光具有60度的相位差,并且第一和第二马赫 - 曾德调制器由三电平信号驱动。