公开(公告)号：US5539657A

公开(公告)日：1996-07-23

申请号：US54195

申请日：1993-04-30

申请人： Kuniaki Utsumi ,  Hiroaki Nakata ,  Susumu Morikura ,  Hiroaki Yamamoto ,  Kazuki Maeda ,  Masaru Fuse

发明人： Kuniaki Utsumi ,  Hiroaki Nakata ,  Susumu Morikura ,  Hiroaki Yamamoto ,  Kazuki Maeda ,  Masaru Fuse

IPC分类号： H04B10/27 ,  H04B10/29 ,  H04B10/54 ,  H04B10/556 ,  H04N5/00 ,  H04N5/44 ,  H04N7/10 ,  H04N7/16 ,  H04N7/22 ,  H04N21/61 ,  H04N21/647 ,  H04J4/00

CPC分类号： H04N7/16 ,  H04N7/22

摘要： A picture image distributing apparatus provided within a passenger moving vehicle, consists of: a head end portion for multichannel FDM picture image signals; an electrical optical for converting the FDM picture image signals into optical signals; an optical amplifier for optically amplifying the optical outputs; one optical fiber transmission path connected to optical taps of unequal distribution for branching halfway on one portion of the optical power except for the branching at a final point, an optical/electrical converter for receiving optical signals branched at the final point or halfway so as to convert them into electrical signals; and a passenger seat picture image receiving terminal connected to the optical/electrical converter so as to receive the electrical signals.

摘要翻译： 设置在乘客移动车辆内的图像分配装置包括：用于多通道FDM图像信号的头端部分; 用于将FDM图像信号转换成光信号的电光学装置; 用于光学放大光输出的光放大器; 一个光纤传输路径连接到不同分布的光学抽头，用于除了最终点之间的分支之外的一部分光功率的一部分上的分支;光/电转换器，用于接收在最终点或中途分支的光信号，以便 将其转换为电信号; 以及连接到光/电转换器的乘客座位图像接收终端，以便接收电信号。

公开(公告)号：US5850303A

公开(公告)日：1998-12-15

申请号：US775247

申请日：1996-12-30

申请人： Hiroaki Yamamoto ,  Hiroyuki Sasai ,  Susumu Morikura ,  Katsuyuki Fujito

发明人： Hiroaki Yamamoto ,  Hiroyuki Sasai ,  Susumu Morikura ,  Katsuyuki Fujito

IPC分类号： H04B10/155 ,  H04J14/02 ,  H04B10/04

CPC分类号： H04J14/02 ,  H04B10/504 ,  H04B10/506 ,  H04J14/0224

摘要： A signal processing circuit 113 subjects a transmission signal outputted from a signal source 111 and a carrier outputted from a carrier generation circuit 112 to predetermined signal processing, to generate a modulation signal amplitude-modulated by the transmission signal and so adapted that its envelop on the high level side (or on the low level side) has a shape analogous to the waveform of the transmission signal and its envelope on the low level side (or on the high level side) is at an approximately constant level. A light source 114 converts the modulation signal into a light intensity modulation signal, and outputs the light intensity modulation signal to an optical coupler 120. The above-mentioned signal processing is performed by the signal processing circuit 113, whereby the spectrum distribution of the light signal outputted from the light source 114 is dispersed, and the peak value of light spectra is decreased. The peak value of beat noise produced after receiving is proportional to the peak value of the light spectra, whereby the peak value of the beat noise is also decreased.

摘要翻译： 信号处理电路113对从信号源111输出的发送信号和从载波生成电路112输出的载波进行规定的信号处理，生成由发送信号进行了幅度调制的调制信号， 高电平侧（或低电平侧）具有与发送信号的波形类似的形状，并且其低电平侧（或高电平侧）的包络处于大致恒定的水平。 光源114将调制信号转换为光强度调制信号，并将光强度调制信号输出到光耦合器120.由信号处理电路113进行上述信号处理，由此光的频谱分布 从光源114输出的信号被分散，光谱的峰值减小。 接收后产生的拍噪噪声的峰值与光谱的峰值成比例，从而峰值噪声也降低。

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。

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。

公开(公告)号：US20060239630A1

公开(公告)日：2006-10-26

申请号：US10546618

申请日：2004-11-22

申请人： Kazutoshi Hase ,  Hiroaki Yamamoto ,  Kuniaki Utsumi

发明人： Kazutoshi Hase ,  Hiroaki Yamamoto ,  Kuniaki Utsumi

IPC分类号： G02B6/00

CPC分类号： H04B10/25759 ,  H03F3/08

摘要： An optical fiber radio transmission system is provided which is capable of considerably improving the received dynamic range of radio signals and, in addition, is capable of optically transmitting radio signals while preventing the deterioration of transmission performance and the loss of linearity of an input signal more easily. A received level detection section 111 detects which one of predetermined levels, i.e., Level I, Level II, and Level III, the received level of a radio signal received by an antenna 400 falls under. A signal control section 112 performs an amplification/attenuation process on the radio signal in accordance with the detected level. A control information sending section 113 superimposes control information indicating the detected level on a primary signal obtained after the amplification/attenuation process. This signal is converted to an optical signal and transmitted. An optical to electrical conversion section 211 converts the optical signal received from a transmitting unit to an electrical signal. A control information extraction section 212 extracts the level from the control information, which has been superimposed on the primary signal. A signal control section 213 performs an amplification/attenuation process on the primary signal in accordance with the extracted level.

摘要翻译： 提供了一种光纤无线电传输系统，其能够显着地改善无线电信号的接收动态范围，并且还能够光学地传输无线电信号，同时防止传输性能的恶化和输入信号的线性度的损失更多 容易。 接收电平检测部分111检测由天线400接收的无线电信号的接收电平的预定电平即电平I，电平II和电平III中的哪一个下降。 信号控制部分112根据检测到的电平对无线电信号进行放大/衰减处理。 控制信息发送部113将表示检测电平的控制信息叠加在放大/衰减处理后获得的主信号上。 该信号被转换成光信号并发送。 光电转换部分211将从发送单元接收的光信号转换为电信号。 控制信息提取部212从叠加在主信号上的控制信息中提取电平。 信号控制部213根据提取的电平对主信号进行放大/衰减处理。

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。

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。

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。

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。

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 。