公开(公告)号：US20070206956A1

公开(公告)日：2007-09-06

申请号：US10590055

申请日：2005-11-10

申请人： Koji Kikushima ,  Satoshi Ikeda

发明人： Koji Kikushima ,  Satoshi Ikeda

IPC分类号： H04B10/04

CPC分类号： H04J1/12 ,  H04B10/25751 ,  H04B10/50593 ,  H04B10/588 ,  H04H20/69 ,  H04J14/0298 ,  H04N7/20 ,  H04N7/22

摘要： In an optical transmission system by frequency-division multiplexing, the interference due to distortions of a first signal against a second signal can be reduced. In the optical transmission system where a modulated optical signal by the first signal is further modulated with the second signal for transmission, distortions of the first signal corresponding to a frequency band of the second signal is extracted. The extracted signal is phase-inverted and then adjusted in phase and amplitude with respect to the distortions of the first signal to obtain a correction signal. By intensity-modulating the first signal containing the distortions by the correction signal, the distortions of the first signal against the second signal can be cancelled out. Alternatively, by intensity-modulating the first signal containing the distortions by a combined signal of the correction signal and the second signal, the distortions of the first signal against the second signal can be cancelled out.

摘要翻译： 在通过频分复用的光传输系统中，可以减少由于第一信号对第二信号的失真引起的干扰。 在光传输系统中，利用第二信号进一步调制由第一信号进行调制的光信号，以提取对应于第二信号的频带的第一信号的失真。 提取的信号被相位反相，然后相对于第一信号的失真以相位和幅度进行调整，以获得校正信号。 通过用校正信号强调调制包含失真的第一信号，可以消除第一信号对第二信号的失真。 或者，通过用校正信号和第二信号的组合信号强调调制包含失真的第一信号，可以抵消第一信号对第二信号的失真。

公开(公告)号：US07865085B2

公开(公告)日：2011-01-04

申请号：US10590055

申请日：2005-11-10

申请人： Koji Kikushima ,  Satoshi Ikeda

发明人： Koji Kikushima ,  Satoshi Ikeda

IPC分类号： H04B10/04

CPC分类号： H04J1/12 ,  H04B10/25751 ,  H04B10/50593 ,  H04B10/588 ,  H04H20/69 ,  H04J14/0298 ,  H04N7/20 ,  H04N7/22

摘要： In an optical transmission system by frequency-division multiplexing, the interference due to distortions of a first signal against a second signal can be reduced. In the optical transmission system where a modulated optical signal by the first signal is further modulated with the second signal for transmission, distortions of the first signal corresponding to a frequency band of the second signal is extracted. The extracted signal is phase-inverted and then adjusted in phase and amplitude with respect to the distortions of the first signal to obtain a correction signal. By intensity-modulating the first signal containing the distortions by the correction signal, the distortions of the first signal against the second signal can be cancelled out. Alternatively, by intensity-modulating the first signal containing the distortions by a combined signal of the correction signal and the second signal, the distortions of the first signal against the second signal can be cancelled out.

摘要翻译： 在通过频分复用的光传输系统中，可以减少由于第一信号对第二信号的失真引起的干扰。 在光传输系统中，利用第二信号进一步调制由第一信号进行调制的光信号，以提取对应于第二信号的频带的第一信号的失真。 提取的信号被相位反相，然后相对于第一信号的失真以相位和幅度进行调整，以获得校正信号。 通过用校正信号强调调制包含失真的第一信号，可以消除第一信号对第二信号的失真。 或者，通过用校正信号和第二信号的组合信号强调调制包含失真的第一信号，可以抵消第一信号对第二信号的失真。

公开(公告)号：US20070212073A1

公开(公告)日：2007-09-13

申请号：US10589689

申请日：2005-07-21

申请人： Koji Kikushima ,  Satoshi Ikeda ,  Akihiro Morita

发明人： Koji Kikushima ,  Satoshi Ikeda ,  Akihiro Morita

IPC分类号： H04J14/02

CPC分类号： H04N7/22 ,  H04J14/0298

摘要： According to the present invention, an apparatus, a system and a method for transmitting a FM batch converted signal and another signal on the same optical fiber can be provided. For example, a first signal such as CATV signal may be FM converted in batch. This converted signal may then be frequency-multiplexed with a second signal such as BS/CS satellite broadcasting RF signal to transmit over optical fiber as an optical signal. The optical signal transmitted via the optical fiber is photoelectrically converted by a single photo-receiving element and is frequency-separated by a filter after passing through a preamplifier. The frequency-separated, FM batch converted signal is FM-demodulated and restored to the first signal, and the frequency-separated second signal is converted to an IF signal by a BS/CS converter. With appropriate setting of the center frequency of the FM batch converted signal, the influence by spurious interference can be minimized.

摘要翻译： 根据本发明，可以提供用于在同一光纤上发送FM批量转换信号和另一信号的装置，系统和方法。 例如，诸如CATV信号的第一信号可以批量FM转换。 然后可以将该转换的信号与诸如BS / CS卫星广播RF信号的第二信号进行频率复用，以通过光纤作为光信号进行发送。 通过光纤传输的光信号由单个光接收元件进行光电转换，并在通过前置放大器之后被滤波器分频。 FM分频转换信号被FM解调并恢复到第一信号，频率分离的第二信号由BS / CS转换器转换成IF信号。 通过适当设置FM批量转换信号的中心频率，可以最大限度地减少杂散干扰的影响。

公开(公告)号：US20080253776A1

公开(公告)日：2008-10-16

申请号：US10587050

申请日：2005-08-05

申请人： Koji Kikushima ,  Satoshi Ikeda

发明人： Koji Kikushima ,  Satoshi Ikeda

IPC分类号： H04B10/06

CPC分类号： H04B10/66 ,  H04B10/25751 ,  H04N7/22

摘要： An optical signal receiver is provided for converting an optical signal being intensity-modulated with high frequency signals, to desired frequency electric signals for output. The optical signal receiver (50) according to the invention receives and converts an optical signal being intensity-modulated with high frequency signals such as a microwave or millimeter wave, to electric signals, which are converted to desired intermediate frequencies by a block down converter (52). By converting the high frequency signals to the desired intermediate frequencies, the transmission loss through transmission media such as a coaxial cable (60) can be reduced. Also, the high frequency characteristics required for an electric connector used at a connecting point with the transmission media are alleviated, so that an inexpensive connector can be used.

摘要翻译： 提供了一种光信号接收器，用于将用高频信号进行强度调制的光信号转换成期望的频率电信号以用于输出。 根据本发明的光信号接收器（50）接收并转换被高频信号（例如微波或毫米波）强度调制的光信号到电信号，该信号通过块降频转换器转换成所需的中频 52）。 通过将高频信号转换为期望的中频，可以减少诸如同轴电缆（60）之类的传输介质的传输损耗。 此外，减轻了在与传输介质的连接点处使用的电连接器所需的高频特性，从而可以使用便宜的连接器。

公开(公告)号：US5896216A

公开(公告)日：1999-04-20

申请号：US671819

申请日：1996-06-25

申请人： Koji Kikushima ,  Nori Shibata ,  Kouichi Suto ,  Katsushi Iwashita ,  Satoshi Ikeda ,  Hiroshi Nakamoto ,  Chisei Kishimoto ,  Kiyomi Kumozaki ,  Naoya Sakurai

发明人： Koji Kikushima ,  Nori Shibata ,  Kouichi Suto ,  Katsushi Iwashita ,  Satoshi Ikeda ,  Hiroshi Nakamoto ,  Chisei Kishimoto ,  Kiyomi Kumozaki ,  Naoya Sakurai

IPC分类号： H04N7/22 ,  H04B10/04

CPC分类号： H04N7/22

摘要： The AM/FM converter of the present invention comprises an optical frequency modulation section which receives multi-channel AM video signals and outputs an optical-frequency-modulated optical signal beam; and an optical heterodyne detection section comprising an optical frequency oscillator composed of a semiconductor local laser which outputs a local oscillator optical beam having an optical frequency separated by a designated intermediate frequency, an optical coupler, and a photoelectric converter composed of a photodiode, which receives the optical signal beam and outputs an electrical batched FM modulation signal which is frequency-modulated and frequency-converted to the intermediate frequency. By means of this configuration, the invention offers an AM/FM converter wherein the frequency band is made considerably wider.

摘要翻译： 本发明的AM / FM转换器包括光频调制部分，其接收多声道AM视频信号并输出​​光调制光信号光束; 以及光学外差检测部分，包括由半导体局部激光器组成的光频率振荡器，所述半导体局部激光器输出具有由指定中间频率分开的光频的本地振荡器光束，光耦合器和由光电二极管组成的光电转换器，所述光电转换器接收 光信号光束并输出被频率调制并频率转换为中频的电批量FM调制信号。 通过这种配置，本发明提供一种AM / FM转换器，其中使频带变得更宽。

公开(公告)号：US20060116143A1

公开(公告)日：2006-06-01

申请号：US10559268

申请日：2004-08-11

申请人： Koji Kikushima

发明人： Koji Kikushima

IPC分类号： H04B15/00

CPC分类号： H04B10/58 ,  H04B10/548

摘要： It is an object of the present invention to provide a distortion generator circuit that generates a distortion substantially equal to that of an FM batch conversion circuit even when input electric signals in a wide frequency range are subjected to frequency modulation by the FM batch conversion circuit. It is another object of the present invention to provide a pre-distortion circuit that compensates for the distortion of the FM batch conversion circuit, an optical signal transmitter having less distortion, an optical signal transmission system by using the distortion generator circuit. A distortion generator circuit of the present invention comprises a distribution circuit (21) that distributes an input electric signal into two electric signals, an FM batch conversion circuit (12) that subjects one output emitted from the distribution circuit to frequency modulation and outputs a frequency-modulated signal, an FM demodulation circuit (92) that subjects an output emitted from the FM batch conversion circuit to frequency demodulation and outputs a frequency-demodulated signal, an amplitude/delay adjustment circuit (38, 39) that subjects the other output emitted from the distribution circuit to amplitude adjustment and delay adjustment and outputs an amplitude-delay-adjusted signal, and a combining circuit that combines an output emitted from the FM demodulation circuit and an output emitted from the amplitude-delay adjustment circuit and outputs a combined signal.

摘要翻译： 本发明的目的是提供一种失真发生器电路，即使在宽频率范围内的输入电信号经过FM批量转换电路进行频率调制时，也产生与FM批次转换电路基本相同的失真。 本发明的另一个目的是提供一种预失真电路，其补偿FM批转换电路的失真，具有较小失真的光信号发射器，通过使用失真发生器电路的光信号传输系统。 本发明的失真发生器电路包括将输入电信号分配成两个电信号的分配电路（21），将从分配电路发出的一个输出进行频率调制的FM批次转换电路（12），并输出频率 FM调制电路（92），其对从FM批量转换电路发出的输出进行频率解调并输出频率解调信号;幅度/延迟调整电路（38,39），其使得另一个输出发出 从分配电路到幅度调整和延迟调整并输出幅度延迟调整信号，以及组合电路，其组合从FM解调电路发射的输出和从振幅延迟调整电路发射的输出，并输出组合信号 。

公开(公告)号：US07248803B2

公开(公告)日：2007-07-24

申请号：US10541162

申请日：2004-11-17

申请人： Koji Kikushima

发明人： Koji Kikushima

IPC分类号： H04J14/02 ,  H04B10/00 ,  H04B10/04 ,  H04B10/06

CPC分类号： H04B10/85 ,  H04B10/506 ,  H04J14/02

摘要： A wavelength multiplex transmission system is provided to reduce crosstalk among wavelengths and reduce deterioration of signals. At a transmission apparatus, one input signal is differentially divided into two; each of the two is converted to an optical signal; and then they are wavelength-multiplexed and transmitted. When crosstalk is arisen in the wavelength multiplex transmission system, the crosstalk is superposed on the two optical signals. The crosstalk is equally superposed on each of the signals with inverted polarities. Accordingly, converting the optical signals to electrical signals and then differentially combining them at a receiving apparatus, their signal components are accumulated, while their crosstalk components are cancelled out. Thereby, in the wavelength multiplex transmission system, deterioration of optical signals due to crosstalk can be reduced.

摘要翻译： 提供了一种波长复用传输系统，以减少波长之间的串扰并减少信号的恶化。 在发送装置中，一个输入信号被差分地分成两个; 两者中的每一个被转换成光信号; 然后它们被波长多路复用并传输。 当波长多路复用传输系统发生串扰时，串扰叠加在两个光信号上。 串扰被叠加在具有反向极性的每个信号上。 因此，将光信号转换为电信号，然后在接收装置处差分地组合它们，其信号分量被累积，同时它们的串扰分量被抵消。 由此，在波分复用发送系统中，可以降低由于串扰引起的光信号的劣化。

公开(公告)号：US20060115273A1

公开(公告)日：2006-06-01

申请号：US10541162

申请日：2004-11-17

申请人： Koji Kikushima

发明人： Koji Kikushima

IPC分类号： H04J14/02

CPC分类号： H04B10/85 ,  H04B10/506 ,  H04J14/02

摘要： A wavelength multiplex transmission system is provided to reduce crosstalk among wavelengths and reduce deterioration of signals. At a transmission apparatus, one input signal is differentially divided into two; each of the two is converted to an optical signal; and then they are wavelength-multiplexed and transmitted. When crosstalk is arisen in the wavelength multiplex transmission system, the crosstalk is superposed on the two optical signals. The crosstalk is equally superposed on each of the signals with inverted polarities. Accordingly, converting the optical signals to electrical signals and then differentially combining them at a receiving apparatus, their signal components are accumulated, while their crosstalk components are cancelled out. Thereby, in the wavelength multiplex transmission system, deterioration of optical signals due to crosstalk can be reduced.

摘要翻译： 提供了一种波长复用传输系统，以减少波长之间的串扰并减少信号的恶化。 在发送装置中，一个输入信号被差分地分成两个; 两者中的每一个被转换成光信号; 然后它们被波长多路复用并传输。 当波长多路复用传输系统发生串扰时，串扰叠加在两个光信号上。 串扰被叠加在具有反向极性的每个信号上。 因此，将光信号转换为电信号，然后在接收装置处差分地组合它们，其信号分量被累积，同时它们的串扰分量被抵消。 由此，在波分复用发送系统中，可以降低由于串扰引起的光信号的劣化。

公开(公告)号：US20060072876A1

公开(公告)日：2006-04-06

申请号：US10532900

申请日：2004-09-03

申请人： Koji Kikushima

发明人： Koji Kikushima

IPC分类号： G02B6/42 ,  G02B6/26

CPC分类号： H04B10/66

摘要： The optical signal receiver of this invention is an optical signal receiver that receives and frequency-demodulates an optical signal, comprising: an optical branch device for splitting an input optical signal into two optical signals (13); an optical delay line for delaying one of the two branched optical signals (15); a first photoelectric conversion circuit (17) for converting the optical signal from the optical delay line into the first electrical signal (17); a second photoelectric conversion circuit (19) for converting the other optical signal of the two branched optical signals into a second electrical signal; the rectangular-wave forming circuit (21, 23, 25) for outputting a single rectangular-wave signal using the first electrical signal from the first photoelectric conversion circuit and the second electrical signal from the second photoelectric conversion circuit as inputs; and a smoothing circuit (12) for smoothing the rectangular-wave signal from the rectangular-wave forming circuit.

摘要翻译： 本发明的光信号接收机是接收和频率解调光信号的光信号接收机，包括：光分支装置，用于将输入光信号分成两个光信号（13）; 用于延迟两个分支光信号之一的光延迟线; 第一光电转换电路（17），用于将来自光延迟线的光信号转换成第一电信号（17）; 第二光电转换电路（19），用于将两个分支光信号的另一光信号转换成第二电信号; 用于使用来自第一光电转换电路的第一电信号和来自第二光电转换电路的第二电信号输出单个矩形波信号的矩形波形成电路（21,23,25）作为输入; 以及用于平滑来自矩形波形成电路的矩形波信号的平滑电路（12）。

公开(公告)号：US07391978B2

公开(公告)日：2008-06-24

申请号：US10525615

申请日：2004-07-09

申请人： Koji Kikushima

发明人： Koji Kikushima

IPC分类号： H04B10/04

CPC分类号： H04J14/02 ,  H04B10/54 ,  H04B10/548 ,  H04J14/0298

摘要： The invention provides an optical signal transmitter low in noise and in distortion and provides an optical signal transmission system using this optical signal transmitter.The optical signal transmitter includes a plurality of frequency modulation means for distributing an electric signal into a plurality of electric signals and applying frequency modulation to the distributed electric signals to output and a multiplexing mean for multiplexing a plurality of signals output from the plurality of frequency modulation means and outputting a multiplexed signal. The plurality of frequency modulation means are set to be substantially equal to each other in frequency deviation and in intermediate frequency and to be substantially identical to each other in the phase of each output.

摘要翻译： 本发明提供了一种噪声低且失真的光信号发射机，并提供了一种使用该光信号发射机的光信号传输系统。 光信号发射机包括多个频率调制装置，用于将电信号分配到多个电信号中并对分配的电信号进行频率调制输出;以及多路复用装置，用于多路复用从多个频率调制 表示并输出多路复用信号。 多个频率调制装置被设置为在频率偏差和中频中彼此基本相等，并且在每个输出的相位中彼此基本相同。