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1. 发明授权

US06271942B1 Optical transmission device and system 失效
标题翻译：光传输装置及系统
公开(公告)号：US06271942B1
公开(公告)日：2001-08-07
申请号：US08978820
申请日：1997-11-26
申请人： Hiroyuki Sasai , Hiroaki Yamamoto , Kuniaki Utsumi , Katsuyuki Fujito , Yutaka Fuke
发明人： Hiroyuki Sasai , Hiroaki Yamamoto , Kuniaki Utsumi , Katsuyuki Fujito , Yutaka Fuke
IPC分类号： H04J1402
CPC分类号： H04B10/564 , H04B10/504 , H04B10/572 , H04B10/58
摘要： An oscillator outputs an additional signal with a frequency which is higher than a frequency corresponding to a bandwidth of a frequency band allotted to an electrical signal to be transmitted and lower than a half of a lowest frequency of a frequency band allotted to the electrical signal to be transmitted. Thereby, if a second order intermodulation distortion between the additional signal and the electrical signal to be transmitted occurs, a frequency where distortion occurs is outside all of the frequency bands allotted to the electrical signal to be transmitted, and the occurring second order intermodulation distortion does not affect the electrical signal to be transmitted. Further, if the second order intermodulation distortion of the additional signal occurs, the frequency where distortion occurs is outside all of the frequency bands allotted to the electrical signal to be transmitted, and the occurring second order intermodulation distortion does not affect the electrical signal to be transmitted. Not only noise and distortions caused by reflected optical signal but also OBI noise can be reduced by using the additional signal.
摘要翻译：振荡器输出一个附加信号，该信号的频率高于分配给要发送的电信号的频带的带宽的频率，并且低于分配给电信号的频带的最低频率的一半，被传送。因此，如果发生附加信号和要发送的电信号之间的二阶互调失真，则发生失真的频率在分配给要发送的电信号的所有频带之外，并且发生的二阶互调失真不影响要传输的电信号。此外，如果发生附加信号的二阶互调失真，则发生失真的频率在分配给要发送的电信号的所有频带之外，并且发生的二阶互调失真不影响电信号传输。不仅可以通过使用附加信号来减少由反射光信号引起的噪声和失真，而且可以减少OBI噪声。

2. 发明授权

US5729281A Catv system in which chanel selection signal is transmitted from the subscriber location 失效
标题翻译：从用户位置发送通道选择信号的Catv系统
公开(公告)号：US5729281A
公开(公告)日：1998-03-17
申请号：US443699
申请日：1995-05-18
申请人： Kuniaki Utsumi , Hiroyuki Sasai , Hiroaki Yamamoto , Manabu Tanabe , Katsuyuki Fujito
发明人： Kuniaki Utsumi , Hiroyuki Sasai , Hiroaki Yamamoto , Manabu Tanabe , Katsuyuki Fujito
IPC分类号： H04H20/38 , H04H20/76 , H04H20/77 , H04H20/78 , H04H60/90 , H04N7/173 , H04N21/222 , H04N21/437 , H04N21/61 , H04N21/647 , H04N21/6587 , H04N7/14
CPC分类号： H04H60/90 , H04H20/38 , H04H20/76 , H04H20/77 , H04H20/78 , H04N7/173
摘要： A center station 1 generates an all-channel signal 2 obtained by multiplexing signals on all channels, and transmits the signals to a selective distribution station 10 through 1 wire transmission line such as an optical fiber. Subscribers' transmitting devices 40.sub.1 to 40.sub.N transmit requests for channels to be received by corresponding subscribers' receiving devices 30.sub.1 to 30.sub.N to the selective distribution station 10 in a radio transmission system. The selective distribution station 10 selects the signals on the channels requested from the all-channel signal 2 in response to requests to receive channels serving as up-signals transmitted in a radio transmission system from the subscribers' transmitting devices 40.sub.1 to 40.sub.N, and distributes and transmits the selected signals to the subscribers' receiving devices 30.sub.1 to 30.sub.N as down-signals.
摘要翻译：中心站1产生通过在所有信道上复用信号而获得的全信道信号2，并且通过诸如光纤的1线传输线将信号发送到选择分配站10。订户发送装置401〜40N向无线传送系统中的选择性分发站10发送要由相应的用户接收装置301〜30N接收的信道的请求。选择分配站10响应于从用户的发送设备401到40N在无线电传输系统中发送的用作接收信道的信道的请求，选择从全信道信号2请求的信道上的信号，并且将所选择的信号作为下行信号发送到用户接收装置301〜30N。

3. 发明授权

US5644389A Method for measuring distance between reflection points along light transmission line and reflectance thereof 失效
标题翻译：测量沿光传输线的反射点之间的距离及其反射率的方法
公开(公告)号：US5644389A
公开(公告)日：1997-07-01
申请号：US557478
申请日：1995-11-14
申请人： Hiroaki Yamamoto , Kuniaki Utsumi , Katsuyuki Fujito
发明人： Hiroaki Yamamoto , Kuniaki Utsumi , Katsuyuki Fujito
IPC分类号： G01M11/02 , G01M11/00 , H04B10/07 , H04B10/077 , H04B10/079 , H04B10/54 , G01N21/88
CPC分类号： G01M11/333 , G01M11/335
摘要： A signal for which the amplitude of envelope becomes substantially 0 only for a certain period of time within the time of a period T, and a measured signal having a certain amplitude are synthesized, and the synthesized signal is optically transmitted. When a plurality of reflection points are present on a light transmission line, there is an increase in harmonic distortion or intermodulation distortion as well as in cross modulation distortion after receiving. This increase in cross modulation distortion causes an increase in variation of amplitude of the measured signal. In such a case, it is possible to calculate the distance between, and/or reflectance of, reflection points present on end faces of optical elements and/or connecting points of optical fibers on the light transmission line by investigating first periodical characteristics of variation of the transmitted measured signal during transmission relative to the change in central light frequency of the signal light, or investigating second periodical characteristics of variation of the transmitted measured signal during transmission corresponding to the change in the frequency of the measured signal.
摘要翻译：在周期T的时间内，信号的幅度变为基本为0的信号在一段时间内被合成，并且合成具有一定幅度的测量信号，并且合成信号被光学传输。当在光传输线上存在多个反射点时，谐波失真或互调失真以及接收后的交叉调制失真增加。交叉调制失真的这种增加导致测量信号的幅度变化的增加。在这种情况下，可以通过调查光传输线上的光学元件的端面和/或光纤的连接点上的反射点之间的距离和/或反射率来计算第一周期特性在传输期间发射的测量信号相对于信号光的中心光频率的变化，或者调查在传输期间发射的测量信号的变化的第二周期特性，对应于测量信号的频率的变化。

4. 发明授权

US5532865A Fiber optic communication terminal, fiber optic communication system, and its wavelength setting method 失效
标题翻译：光纤通信终端，光纤通信系统及其波长设定方法
公开(公告)号：US5532865A
公开(公告)日：1996-07-02
申请号：US526578
申请日：1995-09-11
申请人： Kuniaki Utsumi , Hiroaki Yamamoto , Katsuyuki Fujito
发明人： Kuniaki Utsumi , Hiroaki Yamamoto , Katsuyuki Fujito
IPC分类号： H04B10/155 , H04J14/02 , H04B10/06 , H04B10/04
CPC分类号： H04J14/02 , H04B10/506 , H04B10/564 , H04B10/572
摘要： In a fiber optic communication terminal composed of a light mixing part for mixing an input light signal and a light signal from own station, a detecting part for picking up a part of the output of the light mixing part to detect its quality deterioration, and a light source part in which the wavelength of output light is variable, increase of noise level or occurrence of bit error due to beat interference caused by mixing of input light signal and light signal from the own station is detected as quality deterioration in the detecting part, and by controlling the wavelength of the light source part accordingly, generation of beat interference can be prevented, and moreover by using a fiber optic communication terminal capable of maintaining the wavelength so that the signal quality may be the set value, the output light wavelength can be arranged at high density on the whole as a fiber optic communication system.
摘要翻译：在由用于混合输入光信号的光混合部分和来自本站的光信号组成的光纤通信终端中，检测部分用于拾取光混合部分的输出的一部分以检测其质量劣化，以及作为检测部的质量恶化，检测输出光的波长可变的光源部分，噪声电平的增加或由于输入光信号的混合引起的拍频干扰和来自本台的光信号的位误差的发生，并且通过相应地控制光源部分的波长，可以防止产生拍频干扰，此外，通过使用能够保持波长的光纤通信终端，使得信号质量可以是设定值，输出光波长可以作为光纤通信系统，整体上以高密度排列。

5. 发明申请

US20060045054A1 Wireless communication system 失效
标题翻译：无线通信系统
公开(公告)号：US20060045054A1
公开(公告)日：2006-03-02
申请号：US10530651
申请日：2003-10-17
申请人： Kuniaki Utsumi , Hiroaki Yamamoto , Kouichi Masuda , Tsutomu Niiho , Mariko Nakaso , Hiroyuki Sasai
发明人： Kuniaki Utsumi , Hiroaki Yamamoto , Kouichi Masuda , Tsutomu Niiho , Mariko Nakaso , Hiroyuki Sasai
IPC分类号： H04Q7/24
CPC分类号： H04W4/18 , H04B10/25754 , H04W84/12 , H04W88/04 , H04W92/02
摘要： A SW (70) receives an Ethernet® signal from an outside of areas E and F. The SW (70) selects and outputs the obtained Ethernet® signal to any one of APs (91a to 91e) in accordance with a network structure managed by the SW (70). The AP (91a to 91e) converts the Ethernet® signal to an electrical signal type wireless LAN signal, which is in turn output to a main station (10). The main station (10) frequency-multiplexes the signal output from each of the APs (91a to 91e), and converts the signal to an optical signal, which is in turn output to sub-stations (20a and 20b) The sub-station (20a and 20b) transmits the signal transmitted from the main station (10) to a terminal in the form of a wireless radio wave. Thereby, when a plurality of communication areas are present, the accommodation capacity of an AP can be effectively utilized in each communication area.
摘要翻译： SW（70）从区域E和F的外部接收以太网（R）信号.SW（70）根据以下的方式选择并将获得的以太网（R）信号输出到任何一个AP（91a至91e）具有由SW（70）管理的网络结构。 AP（91a至91e）将以太网（R）信号转换为电信号型无线LAN信号，该电信号型无线LAN信号又输出到主站（10）。主站（10）对从每个AP（91a至91e）输出的信号进行频率复用，并将该信号转换为光信号，该光信号又输出到子站（20a和20b）子站（20A和20b）以无线电波的形式将从主站（10）发送的信号发送到终端。因此，当存在多个通信区域时，可以在每个通信区域中有效地利用AP的容纳能力。

6. 发明授权

US07650112B2 Method and system for extending coverage of WLAN access points via optically multiplexed connection of access points to sub-stations 失效
标题翻译：用于通过接入点的光复用连接来扩展WLAN接入点覆盖范围的方法和系统
公开(公告)号：US07650112B2
公开(公告)日：2010-01-19
申请号：US10530651
申请日：2003-10-17
申请人： Kuniaki Utsumi , Hiroaki Yamamoto , Kouichi Masuda , Tsutomu Niiho , Mariko Nakaso , Hiroyuki Sasai
发明人： Kuniaki Utsumi , Hiroaki Yamamoto , Kouichi Masuda , Tsutomu Niiho , Mariko Nakaso , Hiroyuki Sasai
IPC分类号： H04B7/15
CPC分类号： H04W4/18 , H04B10/25754 , H04W84/12 , H04W88/04 , H04W92/02
摘要： A SW (70) receives an Ethernet® signal from an outside of areas E and F. The SW (70) selects and outputs the obtained Ethernet® signal to any one of APs (91a to 91e) in accordance with a network structure managed by the SW (70). The AP (91a to 91e) converts the Ethernet® signal to an electrical signal type wireless LAN signal, which is in turn output to a main station (10). The main station (10) frequency-multiplexes the signal output from each of the APs (91a to 91e), and converts the signal to an optical signal, which is in turn output to sub-stations (20a and 20b). The sub-station (20a and 20b) transmits the signal transmitted from the main station (10) to a terminal in the form of a wireless radio wave. Thereby, when a plurality of communication areas are present, the accommodation capacity of an AP can be effectively utilized in each communication area.
摘要翻译： SW（70）从区域E和F的外部接收以太网（R）信号.SW（70）根据以下（a）所示的AP（91a至91e）中的任何一个选择并输出所获得的以太网（R）信号 SW（70）管理的网络结构。 AP（91a至91e）将以太网（R）信号转换为电信号型无线LAN信号，该电信号型无线LAN信号又输出到主站（10）。主站（10）对从每个AP（91a至91e）输出的信号进行频率复用，并将该信号转换为光信号，该信号又输出到子站（20a和20b）。子站（20a和20b）以无线电波的形式将从主站（10）发送的信号发送到终端。因此，当存在多个通信区域时，可以在每个通信区域中有效地利用AP的容纳能力。

7. 发明授权

US07460829B2 Wireless communication system 失效
标题翻译：无线通信系统
公开(公告)号：US07460829B2
公开(公告)日：2008-12-02
申请号：US10530976
申请日：2004-07-22
申请人： Kuniaki Utsumi , Hiroaki Yamamoto , Kouichi Masuda , Tsutomu Niiho , Mariko Nakaso , Kazuo Tanaka , Hiroyuki Sasai
发明人： Kuniaki Utsumi , Hiroaki Yamamoto , Kouichi Masuda , Tsutomu Niiho , Mariko Nakaso , Kazuo Tanaka , Hiroyuki Sasai
IPC分类号： H04B7/185
CPC分类号： H04W52/143 , H04B10/25754 , H04W52/24 , H04W88/085
摘要： A wireless communication system capable of keeping a level of a wireless signal received by a relay apparatus within a predetermined dynamic range. In a control apparatus, a transmitting section converts a downstream electric signal into a downstream optical signal and transmits the downstream optical signal to the relay apparatus via an optical transmission path. The relay apparatus converts the received downstream optical signal into a downstream electric signal and transmits the downstream electric signal as a wireless signal to a wireless communication terminal from a transmitting/receiving antenna section. In the relay apparatus, a level adjustment section adjusts the level of the wireless signal transmitted by the relay apparatus such that the receiving level of the wireless signal received by the relay apparatus is kept within a predetermined range.
摘要翻译：一种无线通信系统，其能够将中继装置接收到的无线信号的电平保持在规定的动态范围内。在控制装置中，发送部将下行电信号转换为下行光信号，经由光传输路径将下行光信号发送给中继装置。中继装置将接收到的下行光信号转换成下行电信号，并且将来自发送/接收天线部的无线信号的下行电信号发送到无线通信终端。在中继装置中，电平调整部分调整由中继装置发送的无线信号的电平，使得由中继装置接收的无线信号的接收电平保持在预定范围内。

8. 发明申请

US20050266797A1 Radio communication system 失效
标题翻译：无线通信系统
公开(公告)号：US20050266797A1
公开(公告)日：2005-12-01
申请号：US10530976
申请日：2004-07-22
申请人： Kuniaki Utsumi , Hiroaki Yamamoto , Kouichi Masuda , Tsutomu Niiho , Mariko Nakaso , Kazuo Tanaka , Hiroyuki Sasai
发明人： Kuniaki Utsumi , Hiroaki Yamamoto , Kouichi Masuda , Tsutomu Niiho , Mariko Nakaso , Kazuo Tanaka , Hiroyuki Sasai
IPC分类号： H04B7/005 , H04B10/00 , H04B10/071 , H04B10/077 , H04B10/079 , H04B10/272 , H04J13/00 , H04W52/04 , H04W52/14 , H04W52/24 , H04W88/08 , H04W92/00 , H04B7/14
CPC分类号： H04W52/143 , H04B10/25754 , H04W52/24 , H04W88/085
摘要： The present invention is directed to a wireless communication system capable of keeping a level of a wireless signal received by a relay apparatus (20) within a predetermined dynamic range. In a control apparatus (10), a transmitting section (102) converts a downstream electric signal into a downstream optical signal and transmits the downstream optical signal to the relay apparatus (20) via an optical transmission path (40). The relay apparatus (20) converts the received downstream optical signal into a downstream electric signal and transmits the downstream electric signal as a wireless signal to a wireless communication terminal (30) from a transmitting/receiving antenna section (204). In the relay apparatus (20), a level adjustment section (207) adjusts the level of the wireless signal transmitted by the relay apparatus (20) such that the receiving level of the wireless signal received by the relay apparatus is kept within a predetermined range.
摘要翻译：本发明涉及能够将由中继装置（20）接收的无线信号的电平保持在规定动态范围内的无线通信系统。在控制装置（10）中，发送部（102）将下行电信号转换为下行光信号，经由光传输路径（40）将下行光信号发送给中继装置（20）。中继装置（20）将接收到的下行光信号转换为下行电信号，并将发送/接收天线部（204）的下行电信号作为无线信号发送到无线通信终端（30）。在中继装置（20）中，电平调整部（207）调整由中继装置（20）发送的无线信号的电平，使得由中继装置接收到的无线信号的接收电平保持在预定范围内。

9. 发明授权

US5339315A Cable broadcasting system and the transmission center for on demand program services 失效
标题翻译：有线广播系统和按需节目服务的传输中心
公开(公告)号：US5339315A
公开(公告)日：1994-08-16
申请号：US887475
申请日：1992-05-22
申请人： Kazuki Maeda , Kuniaki Utsumi , Katsuyuki Fujito
发明人： Kazuki Maeda , Kuniaki Utsumi , Katsuyuki Fujito
IPC分类号： H04H20/16 , H04H20/33 , H04H20/69 , H04H20/76 , H04H60/15 , H04H60/23 , H04N7/16 , H04N7/173 , H04N7/22 , H04N21/2365 , H04N21/238
CPC分类号： H04H60/15 , H04H20/16 , H04H20/33 , H04H20/69 , H04H20/76 , H04H60/16 , H04H60/23 , H04N21/2383 , H04N21/4382 , H04N7/163 , H04N7/17336 , H04N7/22
摘要： The present invention provides a cable broadcasting system and the transmission center employed therein. In the transmission center, plural images are divided into several groups in the same kinds and each image in one kind is repeated not simultaneously so that they are outputted as independent plural image signals, and the image that the subscribers have requested is selected from those plural image signals which is enciphered, modulated, and multiplexed to be transmitted in optical transmission lines through an available channel to the subscribers, while the transmission channel is validated as well as the enciphered image signal is deciphered at the subscribers' end in order to enable the subscribers to watch the image they have requested.
摘要翻译：本发明提供一种有线广播系统及其中采用的传输中心。在传输中心，将多个图像分成相同种类的几个组，并且一个类型的每个图像不被同时重复，使得它们作为独立的多个图像信号输出，并且从多个图像中选择用户已经请求的图像图像信号被加密，调制和多路复用以在光传输线路中通过可用信道发送给用户，而传输信道被验证，并且加密的图像信号在用户端被解密，以使得能够订阅者观看他们要求的图像。

10. 发明授权

US06459519B1 Optical transmitter-receiver 失效
标题翻译：光收发器
公开(公告)号：US06459519B1
公开(公告)日：2002-10-01
申请号：US09056611
申请日：1998-04-08
申请人： Hiroyuki Sasai , Kazuki Maeda , Kuniaki Utsumi
发明人： Hiroyuki Sasai , Kazuki Maeda , Kuniaki Utsumi
IPC分类号： H04B1004
CPC分类号： H04B10/572 , H04B10/505 , H04B10/5051
摘要： A modulated electrical signal Smod produced upon amplitude-modulating a subcarrier having a high frequency (for example, a millimeter-wave band) by a baseband signal SBB to be transmitted and a main carrier MC outputted from a light source are inputted to an external optical modulating portion in an optical transmitter. The external optical modulating portion amplitude-modulates the main carrier MC by the modulated electrical signal Smod, to output a double-modulated optical signal OSdmod to an optical filter portion. The optical filter portion passes only a component of one of sidebands included in the double-modulated optical signal OSdmod, and outputs the component to an optical fiber as an optical signal OS. An optical/electrical converting portion in an optical receiver optical/electrical-converts the optical signal OS transmitted through the optical fiber, to directly obtain a baseband signal SBB. Consequently, the optical receiver is constructed simply and at low cost without requiring a wideband optical/electrical converting element for optical/electrical-converting a high-frequency electrical signal and a high-frequency electrical component (a frequency converter, a demodulator, a semirigid cable or a waveguide) which is very high in cost or is difficult to process.
摘要翻译：通过对要发送的基带信号SBB和从光源输出的主载波MC对具有高频（例如，毫米波频带）的子载波进行幅度调制而产生的调制电信号Smod被输入到外部光调制部分。外部光调制部通过调制后的电信号Smod对主载波MC进行振幅调制，将双调制光信号OSdmod输出到滤光器部。光滤波器部分仅通过包含在双调制光信号OSdmod中的一个边带的分量，并将该分量输出到光纤作为光信号OS。光接收机中的光/电转换部分对通过光纤传输的光信号OS进行光/电转换，以直接获得基带信号SBB。因此，光接收机简单且低成本地构成，而不需要用于光/电转换高频电信号和高频电气部件的宽带光/电转换元件（变频器，解调器，半刚性电缆或波导），其成本非常高或难以处理。

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