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1. 发明授权

US06983108B2 Optical switching apparatus and optical transmission apparatus 失效
公开(公告)号：US06983108B2
公开(公告)日：2006-01-03
申请号：US09978637
申请日：2001-10-18
申请人： Mitsuru Sugawara , Takashi Yano , Kyosuke Dobashi , Katsumi Kusama , Sadao Tanikoshi , Kazuhiko Ide , Mitsuru Otani , Masayuki Takami , Mototaka Kitajima
发明人： Mitsuru Sugawara , Takashi Yano , Kyosuke Dobashi , Katsumi Kusama , Sadao Tanikoshi , Kazuhiko Ide , Mitsuru Otani , Masayuki Takami , Mototaka Kitajima
IPC分类号： H04J14/00
CPC分类号： H04J14/0294 , H04J14/0204 , H04J14/0205 , H04J14/0206 , H04J14/0212 , H04J14/0216 , H04J14/0219 , H04J14/0283 , H04J14/0291 , H04Q11/0005 , H04Q2011/0081
摘要： Optical signals inputted to input ports are split in half by 1×2 optical splitters respectively and the resulting signals are inputted to the input terminals of an optical matrix switch. The optical matrix switch switches between the routes of the individual optical signals and outputs the signal at any of the output ports. This enables the optical signal from the same input port to be outputted at two different output ports, which makes it possible to effect “bridge” at the time of protection switching.

2. 发明申请

US20110195657A1 RADIO RELAY APPARATUS 审中-公开
标题翻译：无线电继电器
公开(公告)号：US20110195657A1
公开(公告)日：2011-08-11
申请号：US13020885
申请日：2011-02-04
申请人： Daisuke Takeda , Ren Sakata , Noritaka Deguchi , Mototaka Kitajima
发明人： Daisuke Takeda , Ren Sakata , Noritaka Deguchi , Mototaka Kitajima
IPC分类号： H04B3/36
CPC分类号： H04B7/15585
摘要： According to one embodiment, a radio relay apparatus includes a reception unit, a cancellation unit, a weight calculation unit, and a weight multiplication unit. The reception unit generates M first baseband signals based on M first RF signals supplied by M reception antennas. The cancellation unit subtracts M replicated signals replicating loop interference signals in the M reception antennas, from the respective M first baseband signals, to obtain M second baseband signals. The weight calculation unit calculates M×M weights corresponding to M×M loop interference channels. The weight multiplication unit multiplies the M second baseband signals by the M weights corresponding to the respective M reception antennas and then combines resultant signals together to obtain M replicated signals to be supplied to the cancellation unit.
摘要翻译：根据一个实施例，无线电中继设备包括接收单元，消除单元，权重计算单元和加权乘法单元。接收单元基于由M个接收天线提供的M个第一RF信号来生成M个第一基带信号。消除单元从各个M个第一基带信号中减去M个接收天线中的M个复制信号复制环路干扰信号，以获得M个第二基带信号。权重计算单元计算对应于M×M个环路干扰信道的M×M个权重。权重乘法单元将M个第二基带信号乘以与各个M个接收天线相对应的M个权重，然后将合成的信号合并在一起，获得提供给取消单元的M个复制信号。

3. 发明授权

US07751715B2 Optical transmission system, optical receiver, and its gain adjustment method 有权
标题翻译：光传输系统，光接收机及其增益调整方法
公开(公告)号：US07751715B2
公开(公告)日：2010-07-06
申请号：US11808214
申请日：2007-06-07
申请人： Masayuki Takami , Mototaka Kitajima , Yoshiki Namba
发明人： Masayuki Takami , Mototaka Kitajima , Yoshiki Namba
IPC分类号： H04B10/00
CPC分类号： H03G3/3084 , H04B10/6931
摘要： An optical transmission system comprises master unit and remote unit, the master unit includes optical transmitter transmits the optical signal to the optical fiber at a fixed averaged output level, the remote unit includes optical receiver receives optical signal via optical fiber, and optical receiver includes light receiving element converts optical signal into electric signal, variable gain amplifier amplifies the electric signal at a gain corresponding to a value of a given adjustment voltage, gain controller supplied power for, a defined control period, controls the adjustment voltage to stabilize an averaged level of the electric signal to a defined value, and feed-forward-controls a gain of variable gain amplifier, a shut off unit shuts off supply of power to the gain control circuit when the control period ends, and a keeping unit keeps a value of an adjustment voltage applied to the variable gain amplifier.
摘要翻译：光传输系统包括主单元和远程单元，主单元包括光发射机以固定的平均输出电平将光信号发送到光纤，远端单元包括光接收机通过光纤接收光信号，光接收机包括光接收元件将光信号转换为电信号，可变增益放大器以对应于给定调整电压的值的增益放大电信号，在限定的控制周期内增益控制器提供的功率，控制调节电压以稳定平均电平电信号为规定值，并且前馈控制可变增益放大器的增益，当控制周期结束时，切断单元切断对增益控制电路的供电，保持单元保持值施加到可变增益放大器的调整电压。

4. 发明申请

US20070286601A1 Optical transmission system, optical receiver, and its gain adjustment method 有权
标题翻译：光传输系统，光接收机及其增益调整方法
公开(公告)号：US20070286601A1
公开(公告)日：2007-12-13
申请号：US11808214
申请日：2007-06-07
申请人： Masayuki Takami , Mototaka Kitajima , Yoshiki Namba
发明人： Masayuki Takami , Mototaka Kitajima , Yoshiki Namba
IPC分类号： H04J14/00
CPC分类号： H03G3/3084 , H04B10/6931
摘要： An optical transmission system comprises master unit and remote unit, the master unit includes optical transmitter transmits the optical signal to the optical fiber at a fixed averaged output level, the remote unit includes optical receiver receives optical signal via optical fiber, and optical receiver includes light receiving element converts optical signal into electric signal, variable gain amplifier amplifies the electric signal at a gain corresponding to a value of a given adjustment voltage, gain controller supplied power for, a defined control period, controls the adjustment voltage to stabilize an averaged level of the electric signal to a defined value, and feed-forward-controls a gain of variable gain amplifier, a shut off unit shuts off supply of power to the gain control circuit when the control period ends, and a keeping unit keeps a value of an adjustment voltage applied to the variable gain amplifier.
摘要翻译：光传输系统包括主单元和远程单元，主单元包括光发射机以固定的平均输出电平将光信号发送到光纤，远端单元包括光接收机通过光纤接收光信号，光接收机包括光接收元件将光信号转换为电信号，可变增益放大器以对应于给定调整电压的值的增益放大电信号，在限定的控制周期内增益控制器提供的功率，控制调节电压以稳定平均电平电信号为规定值，并且前馈控制可变增益放大器的增益，当控制周期结束时，切断单元切断对增益控制电路的供电，保持单元保持值施加到可变增益放大器的调整电压。

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