专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明公开

EP1953933A1 Transmission system and transmission method 有权
标题翻译： Übertragungssystemund -verfahren
公开(公告)号：EP1953933A1
公开(公告)日：2008-08-06
申请号：EP08001824.5
申请日：2008-01-31
申请人： Fujitsu Ltd.
发明人： Ooi, Hiroki , Miura, Akira , Hoshida, Takeshi , Nakamura, Kentaro , Sugaya, Yasushi , Goto, Ryosuke
IPC分类号： H04B10/18 , H04J14/02
CPC分类号： H04J14/02 , H04B10/2513 , H04B10/2557 , H04J14/0201
摘要： A wavelength division multiplexing system according to the present art adjusts the amount of dispersion compensation (the amount of dispersion compensation of an NZ-DSF and a DCF) every all spans on the basis of the time slot when an intensity modulation signal transmitter outputs an intensity modulation signal and the wavelength interval when a wavelength coupler multiplexes a phase modulation signal (output from a phase modulation signal transmitter) and the intensity modulation signal.
摘要翻译：根据本技术的波分复用系统根据强度调制信号发射机输出强度的时隙，调整每个跨度的色散补偿量（NZ-DSF和DCF的色散补偿量）调制信号和波长耦合器复用相位调制信号（相位调制信号发射机的输出）和强度调制信号的波长间隔。

2. 发明公开

EP1959590A3 Analog-to-digital conversion controller, optical receiving device, optical receiving method, and waveform-distortion compensating device 有权
标题翻译：控制用于模拟 - 数字转换，光接收装置，光接收方法和装置，用于补偿波形失真
公开(公告)号：EP1959590A3
公开(公告)日：2008-08-27
申请号：EP08000030.0
申请日：2008-01-02
申请人： Fujitsu Ltd.
发明人： Tanimura, Takahito , Nakashima, Hisao , Hoshida, Takeshi
IPC分类号： H04B10/18
CPC分类号： H04L7/007 , H03M1/1255 , H04B10/697
摘要： An optical receiving device of the present invention receives optical signals from an optical transmitting device which uses a modulation format wherein an optical intensity waveform of each symbol is return-to-zero (RZ) pulse, and converts the received optical signals into digital signals by a conversion process of an analog to digital (AD) converter. A control-value calculating unit subsequent to the AD converter digitally processes the digital signals, retrieves an absolute value of the digital signals or a value corresponding one-to-one with the absolute value of the digital signals, estimates errors from an appropriate timing of a sampling timing in the AD converter based on the absolute value of the digital signals or the value corresponding one-to-one with the absolute value of the digital signals, and calculates a control value controlling the sampling timing based on the estimated errors. Based on the control value, a phase of a pulse regulating the sampling timing of AD conversion can be compensated.

3. 发明授权

EP1959590B1 Analog-to-digital conversion controller, optical receiving device and optical receiving method 有权
标题翻译：控制用于模拟 - 数字转换，光接收装置和光接收方法
公开(公告)号：EP1959590B1
公开(公告)日：2011-03-30
申请号：EP08000030.0
申请日：2008-01-02
申请人： Fujitsu Ltd.
发明人： Tanimura, Takahito , Nakashima, Hisao , Hoshida, Takeshi
IPC分类号： H04B10/18
CPC分类号： H04L7/007 , H03M1/1255 , H04B10/697

4. 发明公开

EP1959590A2 Analog-to-digital conversion controller, optical receiving device, optical receiving method, and waveform-distortion compensating device 有权
标题翻译： SteuerungfürAnalog-Digital-Umwandlung，optische Empfangsvorrichtung und optisches Empfangsverfahren
公开(公告)号：EP1959590A2
公开(公告)日：2008-08-20
申请号：EP08000030.0
申请日：2008-01-02
申请人： Fujitsu Ltd.
发明人： Tanimura, Takahito , Nakashima, Hisao , Hoshida, Takeshi
IPC分类号： H04B10/18
CPC分类号： H04L7/007 , H03M1/1255 , H04B10/697
摘要： An optical receiving device of the present invention receives optical signals from an optical transmitting device which uses a modulation format wherein an optical intensity waveform of each symbol is return-to-zero (RZ) pulse, and converts the received optical signals into digital signals by a conversion process of an analog to digital (AD) converter. A control-value calculating unit subsequent to the AD converter digitally processes the digital signals, retrieves an absolute value of the digital signals or a value corresponding one-to-one with the absolute value of the digital signals, estimates errors from an appropriate timing of a sampling timing in the AD converter based on the absolute value of the digital signals or the value corresponding one-to-one with the absolute value of the digital signals, and calculates a control value controlling the sampling timing based on the estimated errors. Based on the control value, a phase of a pulse regulating the sampling timing of AD conversion can be compensated.
摘要翻译：本发明的光接收装置接收来自光发送装置的光信号，该光发送装置采用调制格式，其中每个符号的光强度波形为归零（RZ）脉冲，并将接收到的光信号转换为数字信号模数转换器（AD）转换器的转换过程。 AD转换器之后的控制值计算单元对数字信号进行数字处理，用数字信号的绝对值检索数字信号的绝对值或与之对应的值，从适当的定时估计误差基于数字信号的绝对值或与数字信号的绝对值相对应的值的AD转换器中的采样定时，并且基于估计的误差来计算控制采样定时的控制值。基于控制值，可以补偿调节AD转换的采样定时的脉冲的相位。

5. 发明公开

EP1816763A1 Optical receiving apparatus and optical communication system comprising it 有权
标题翻译： Optische Empfangsvorrichtung und optisches Kommunikationssystem damit
公开(公告)号：EP1816763A1
公开(公告)日：2007-08-08
申请号：EP07009948.6
申请日：2005-12-29
申请人： Fujitsu Ltd.
发明人： Akiyama, Yuichi , Hoshida, Takeshi , Miura, Akira , Kai, Yutaka , Ooi, Hiroki , Rasmussen, Jens C. , Nakamura, Kentaro , Kuwata, Naoki , Nishizawa, Yoshinori , Takahara, Tomoo , Yuki, Masahiro
IPC分类号： H04B10/158
CPC分类号： G02F1/2255 , G02F1/0123 , H04B10/505 , H04B10/5051 , H04B10/5053 , H04B10/50575 , H04B10/50577 , H04B10/50595 , H04B10/5162 , H04B10/5165 , H04B10/5561 , H04B10/66 , H04B10/677
摘要： A phase shift unit (12) provides a prescribed phase difference (π/2, for example) between a pair of optical signals transmitted via a pair of arms constituting a data modulation unit (20). A low-frequency signal f 0 is superimposed on one of the optical signals. A signal of which phase is shifted by π/2 from the low-frequency signal f 0 is superimposed on the other optical signal. A pair of the optical signals is coupled, and a part of which is converted into an electrical signal by a photodiode (3). 2f 0 component contained in the electrical signal is extracted. Bias voltage provided to the phase shift unit (12) is controlled by feedback control so that the 2f 0 component becomes the minimum.
摘要翻译：相移单元（12）在经由构成数据调制单元（20）的一对臂发送的一对光信号之间提供规定的相位差（例如，±2）。低频信号f 0叠加在一个光信号上。相位偏离低频信号f 0的信号被叠加在另一个光信号上。一对光信号被耦合，其一部分由光电二极管（3）转换成电信号。提取包含在电信号中的2f 0分量。通过反馈控制来控制提供给相移单元（12）的偏压，使得2f 0分量成为最小。

6. 发明授权

EP1816763B1 Optical receiving apparatus and optical communication system comprising it 有权
标题翻译：光接收装置和包括它的光通信系统
公开(公告)号：EP1816763B1
公开(公告)日：2009-11-25
申请号：EP07009948.6
申请日：2005-12-29
申请人： Fujitsu Ltd.
发明人： Akiyama, Yuichi , Hoshida, Takeshi , Miura, Akira , Kai, Yutaka , Ooi, Hiroki , Rasmussen, Jens C. , Nakamura, Kentaro , Kuwata, Naoki , Nishizawa, Yoshinori , Takahara, Tomoo , Yuki, Masahiro
IPC分类号： H04B10/158
CPC分类号： G02F1/2255 , G02F1/0123 , H04B10/505 , H04B10/5051 , H04B10/5053 , H04B10/50575 , H04B10/50577 , H04B10/50595 , H04B10/5162 , H04B10/5165 , H04B10/5561 , H04B10/66 , H04B10/677

7. 发明授权

EP1953933B1 Transmission system and transmission method 有权
标题翻译：传输系统及方法
公开(公告)号：EP1953933B1
公开(公告)日：2013-03-06
申请号：EP08001824.5
申请日：2008-01-31
申请人： Fujitsu Ltd.
发明人： Ooi, Hiroki , Miura, Akira , Hoshida, Takeshi , Nakamura, Kentaro , Sugaya, Yasushi , Goto, Ryosuke
IPC分类号： H04B10/2507 , H04J14/02
CPC分类号： H04J14/02 , H04B10/2513 , H04B10/2557 , H04J14/0201

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式