-
公开(公告)号：US09094134B2
公开(公告)日：2015-07-28
申请号：US14003139
申请日：2011-04-05
申请人： Masaki Noda , Masamichi Nogami , Junichi Nakagawa
发明人： Masaki Noda , Masamichi Nogami , Junichi Nakagawa
CPC分类号： H04B10/6931 , H03G3/3084 , H04B10/693
摘要： An optical receiver including: a preamplifier capable of changing a conversion gain in accordance with a reception level of a received burst signal; a gain control circuit capable of switching between a fast time constant and a slow time constant; and a convergence determination circuit for outputting a time constant switching signal in accordance with a state of the gain control circuit (transient state or steady state) and a reset signal between the burst signals. This configuration can switch the time constant of the gain control circuit at an appropriate timing.
摘要翻译： 一种光接收机，包括：前置放大器，其能够根据接收到的突发信号的接收电平来改变转换增益; 能够在快速时间常数和慢时间常数之间切换的增益控制电路; 和用于根据增益控制电路的状态（瞬态或稳态）输出时间常数切换信号和突发信号之间的复位信号的会聚判定电路。 该配置可以在适当的时刻切换增益控制电路的时间常数。
-
公开(公告)号：US09002107B2
公开(公告)日：2015-04-07
申请号：US12962895
申请日：2010-12-08
申请人： Junichi Nakagawa , Hiroyuki Sakai , Kiyoshi Umeda
发明人： Junichi Nakagawa , Hiroyuki Sakai , Kiyoshi Umeda
CPC分类号： G06T11/001
摘要： An image processing apparatus for applying a color balance correction to input image data, comprises a detection unit which detects an object included in the image data; an object color calculation unit which calculates an object color as a color of the object; an acquisition unit which acquires a highlight color in the image data; a calculation unit which calculates a correction value for the object color and the highlight color based on a relative positional relationship between the object color and the highlight color on a color space; and a color balance correction unit which applies the color balance correction to the highlight color and the object color using the correction value.
摘要翻译： 一种用于对输入图像数据应用色彩平衡校正的图像处理装置，包括：检测单元，其检测包括在图像数据中的对象; 对象颜色计算单元，其计算作为对象的颜色的对象颜色; 获取单元，其获取图像数据中的高亮颜色; 计算单元，其基于颜色空间上的对象颜色和高亮颜色之间的相对位置关系来计算对象颜色和高亮颜色的校正值; 以及颜色平衡校正单元，其使用校正值将颜色平衡校正应用于高亮颜色和对象颜色。
-
23.发明申请OPTICAL ACCESS SYSTEM, STATION-SIDE TERMINATION APPARATUS, AND SUBSCRIBER-SIDE TERMINATION APPARATUS 审中-公开光接入系统，站端终端设备和订户端终端设备公开(公告)号：US20120099865A1
公开(公告)日：2012-04-26
申请号：US13379369
申请日：2009-06-23
申请人： Kenji Ishii , Junichi Nakagawa
发明人： Kenji Ishii , Junichi Nakagawa
CPC分类号： H04L25/03159 , H04L25/03343 , H04L27/2607 , H04L27/2636
摘要： In an optical access system, the OLT includes a CP inserting unit that inserts a CP into a downlink signal; a CP removing unit that removes a CP from an uplink signal received from the ONU; and an FFT unit, an EQ unit, and an inverse FFT unit that perform equalization on the uplink CP-removed signal according to a frequency domain equalization scheme based on an inverse characteristic of the characteristic of a transmission line leading to the ONU. The ONU includes a CP inserting unit; a CP removing unit; and an FFT unit, an EQ unit, and an inverse FFT unit that perform equalization on the downlink CP-removed signal according to the frequency domain equalization scheme based on an inverse characteristic of the prestored characteristic of the a transmission line leading to the OLT.
摘要翻译： 在光接入系统中，OLT包括将CP插入下行链路信号的CP插入单元; CP去除单元，从从ONU接收的上行链路信号中去除CP; 以及FFT单元，EQ单元和逆FFT单元，其基于通向ONU的传输线的特性的反特性，根据频域均衡方案对上行链路CP去除信号执行均衡。 ONU包括CP插入单元; CP去除单元; 以及FFT单元，EQ单元和逆FFT单元，其基于通向OLT的传输线的预存储特性的反特性，根据频域均衡方案对下行链路CP去除信号执行均衡。
-
公开(公告)号：US08155535B2
公开(公告)日：2012-04-10
申请号：US12086292
申请日：2006-03-03
申请人： Masaki Noda , Masamichi Nogami , Junichi Nakagawa
发明人： Masaki Noda , Masamichi Nogami , Junichi Nakagawa
IPC分类号： H04B10/06
CPC分类号： H03F3/08 , H03G3/001 , H03G3/3084 , H04B10/6931
摘要： An optical receiver for stably reproducing packets having different light receiving levels is disclosed. The optical receiver includes: a light receiving element for outputting a current in response to a light receiving level of an optical signal; a preamplifier for converting the current signal outputted from the light receiving element into a voltage signal; a circuit for detecting a consecutive same binary symbols portion from a binary symbols stream of the voltage signal outputted from the preamplifier to output a time constant switching signal in response to a detection result thereof; a level detecting circuit for detecting a voltage level of the voltage signal outputted from the preamplifier based upon a time constant which is switched/controlled in response to the time constant switching signal; and an amplifier for amplifying an output voltage of the level detecting circuit to apply a control voltage for controlling the gain to the preamplifier.
摘要翻译： 公开了一种用于稳定再现具有不同光接收电平的分组的光接收机。 光接收器包括：用于响应于光信号的光接收电平输出电流的光接收元件; 用于将从光接收元件输出的电流信号转换为电压信号的前置放大器; 用于从前置放大器输出的电压信号的二进制符号流检测连续相同的二进制符号部分的电路，以响应其检测结果输出时间常数切换信号; 电平检测电路，用于基于响应于时间常数切换信号而被切换/控制的时间常数来检测从前置放大器输出的电压信号的电压电平; 以及放大器，用于放大电平检测电路的输出电压，以将用于控制增益的控制电压施加到前置放大器。
-
公开(公告)号：US20050078628A1
公开(公告)日：2005-04-14
申请号：US10968377
申请日：2004-10-18
申请人： Toshiro Suzuki , Satoshi Takahashi , Junichi Nakagawa , Ken Takei
发明人： Toshiro Suzuki , Satoshi Takahashi , Junichi Nakagawa , Ken Takei
IPC分类号： H04W16/02 , C10G27/12 , C10G31/00 , C10G45/02 , C10G45/58 , H04B7/005 , H04B7/26 , H04J13/00 , H04W16/00 , H04W16/24 , H04W52/16 , H04W52/28 , H04W52/34 , H04J1/10
CPC分类号： H04W52/283 , C10G27/12 , C10G31/00 , C10G45/02 , C10G45/58 , H04B7/2618 , H04W16/00 , H04W52/16 , H04W52/281 , H04W52/282 , H04W52/343 , H04W52/346
摘要： A radio base station, comprising: a time slot preparing unit for preparing a time slot to be transmitted to a radio terminal; a selecting unit for selecting a modulation system and a coding method of the time slot prepared by the preparing unit; a signal processing unit for modulating and coding the time slot prepared by the preparing unit according to the modulation system and the coding method, which are selected by the selecting unit; an amplifying unit for amplifying a slot modulated and coded by the signal processing unit; a controlling unit for controlling the amplifying unit to amplify a transmitting power of a specified priority slot among the plurality of time slots so as to be larger than that of a non-priority slot; and an antenna unit for transmitting the time slot amplified by the amplifying unit.
-
26.发明授权公开(公告)号：US06657778B1
公开(公告)日：2003-12-02
申请号：US09806456
申请日：2001-04-18
IPC分类号： H04B1012
CPC分类号： H04B10/2941 , H04B10/296 , H04B2210/258 , H04J14/0221
摘要： Light signals of first to n-th bands amplified en bloc undergo proper attenuation through an adjustable optical attenuator in conformance with attenuation in an optical fiber connected to input of an optical amplifying repeater apparatus, whereon the light signals are demultiplexed or separated into individual bands and amplified by first to n-th fixed-gain optical amplifiers (#1, . . . , #n) each having a high fixed gain in the respective bands to be subsequently multiplexed by an optical multiplexer and then sent out onto a transmission line. A monitoring light branching device extracts a part of light power of a specific monitoring wavelength, which is then fed to an adjustable attenuator control circuit which controls the attenuation factor of the adjustable optical attenuator so that the light power of the specific wavelength remains constant. The gain of the optical amplifying repeater apparatus at the specific wavelength can thus be determined. By employing as the optical amplifying medium a substantially homogeneous medium, the gain for the other wavelengths can be fixed. The optical amplifying repeater apparatus whose gain is essentially independent of the change in the number of the wavelengths can thus be realized.
摘要翻译： 第一至第n个频带放大的光信号通过可调节的光衰减器经过适当的衰减，其符合连接到光放大中继器设备的输入的光纤中的衰减，其中光信号被解复用或分离成单个频带， 由第一至第n固定增益光放大器（＃1，...，#n）放大，每个固定增益光放大器（＃1，...，#n）在各个频带中具有高固定增益，随后由光复用器复用，然后发送到传输线。 监视光分支装置提取特定监视波长的一部分光功率，然后将其馈送到可调节衰减器控制电路，该可调节衰减器控制电路控制可调节光衰减器的衰减因子，使得特定波长的光功率保持恒定。 因此可以确定特定波长的光放大中继器装置的增益。 通过采用基本均匀的介质作为光放大介质，可以固定其它波长的增益。 因此可以实现其增益基本上与波长数量的变化无关的光放大中继器装置。
-
公开(公告)号：US4204176A
公开(公告)日：1980-05-20
申请号：US893014
申请日：1978-04-03
CPC分类号： H04B3/145
摘要： A variable equalizer whose frequency characteristic varies in a range of 1-1/Y(f).sup.2when the gain x of a variable amplifier varies from 0 (zero) to .infin. (infinity), and which reduces the number of shaping networks for the variable frequency characteristic.It is constructed of a forward pass circuit which consists of a variable amplifier and a frequency-dependent first circuit connected in the order mentioned between input and output terminals, a feedback pass circuit which is dependent upon the frequency and which feeds-back an output of the variable amplifier to an input thereof, and a feed forward pass circuit which is independent of the frequency and which feeds forward part of the input of the variable amplifier to an output of the first circuit.
摘要翻译： 当可变放大器的增益x从0（零）到INFINITY（无穷大）变化时，其频率特性在1-1 / Y（f）2的范围内变化的可变均衡器，并且这减少了 可变频率特性。 它由正向电路构成，该正向电路由可变放大器和按照输入和输出端之间的顺序连接的频率依赖的第一电路组成，反馈通道电路取决于频率，并且反馈输出 可变放大器到其输入端，以及前馈传输电路，其独立于频率，并且将可变放大器的输入的前部部分馈送到第一电路的输出。
-
公开(公告)号：US20130343769A1
公开(公告)日：2013-12-26
申请号：US14003139
申请日：2011-04-05
申请人： Masaki Noda , Masamichi Nogami , Junichi Nakagawa
发明人： Masaki Noda , Masamichi Nogami , Junichi Nakagawa
IPC分类号： H04B10/60
CPC分类号： H04B10/6931 , H03G3/3084 , H04B10/693
摘要： An optical receiver including: a preamplifier capable of changing a conversion gain in accordance with a reception level of a received burst signal; a gain control circuit capable of switching between a fast time constant and a slow time constant; and a convergence determination circuit for outputting a time constant switching signal in accordance with a state of the gain control circuit (transient state or steady state) and a reset signal between the burst signals. This configuration can switch the time constant of the gain control circuit at an appropriate timing.
摘要翻译： 一种光接收机，包括：前置放大器，其能够根据接收到的突发信号的接收电平来改变转换增益; 能够在快速时间常数和慢时间常数之间切换的增益控制电路; 和用于根据增益控制电路的状态（瞬态或稳态）输出时间常数切换信号和突发信号之间的复位信号的会聚判定电路。 该配置可以在适当的时刻切换增益控制电路的时间常数。
-
公开(公告)号：US20130308669A1
公开(公告)日：2013-11-21
申请号：US13983879
申请日：2011-02-07
IPC分类号： H01S5/00
CPC分类号： H01S5/0085 , H01S5/0427 , H01S5/06226 , H04B10/504
摘要： A laser diode drive circuit includes a laser diode (LD), a modulation-current differential drive circuit, a bias-current differential drive circuit, a first inductance connected between an anode of the LD and a positive power source, a second inductance connected between a cathode of the LD and a negative-phase output terminal of the bias-current differential drive circuit, a first resistor connected to a connection point of the anode of the LD and the first inductance and connected to a negative-phase output terminal of the modulation-current differential drive circuit, and a second resistor connected to a connection point of the cathode of the LD and the second inductance and connected to a positive-phase output terminal of the modulation-current differential drive circuit, and a positive-phase output terminal of the bias-current differential drive circuit is connected to the connection point.
摘要翻译： 激光二极管驱动电路包括激光二极管（LD），调制电流差分驱动电路，偏置电流差分驱动电路，连接在LD的阳极和正电源之间的第一电感， LD的阴极和偏置电流差分驱动电路的负相输出端子，连接到LD的阳极的连接点和第一电感的第一电阻器，并连接到所述偏置电流差动驱动电路的负相输出端子 调制电流差分驱动电路和连接到LD的阴极和第二电感的连接点并连接到调制电流差分驱动电路的正相输出端的第二电阻器，以及正相输出端 偏置电流差动驱动电路的端子连接到连接点。
-
公开(公告)号：US20100189436A1
公开(公告)日：2010-07-29
申请号：US12664678
申请日：2007-07-18
申请人： Junichi Nakagawa , Masamichi Nogami
发明人： Junichi Nakagawa , Masamichi Nogami
IPC分类号： H04J14/02
CPC分类号： H04B10/272 , H04J14/0226 , H04J14/0227 , H04J14/0246 , H04J14/0247 , H04J14/025 , H04J14/0252 , H04J14/0279 , H04J14/0282
摘要： Provided is a point-to-multipoint optical communication system capable of extending a transmission distance between a subscriber apparatus and a station apparatus without changing wavelengths of an upstream optical signal and a downstream optical signal, which are used in both of the apparatuses. The point-to-multipoint optical communication system includes, as a basic configuration thereof, an optical network for connecting one station apparatus (1) to a plurality of (n) subscriber apparatuses (4). Among m basic configurations, one station-side wavelength multiplexer/demultiplexer (22), one optical fiber transmission line (30), and one subscriber-side wavelength multiplexer/demultiplexer (12) are shared. The point-to-multipoint optical communication system further includes a station-side repeating unit (20) and a subscriber-side repeating unit (10) each including the one wavelength multiplexer/demultiplexer (22 or 12) and m wavelength converters (21 or 11). An optical signal having a conventionally-used wavelength is used between the station apparatus (1) and the station-side repeating unit (20) and between the subscriber apparatus (4) and the subscriber-side repeating unit (10), and an extensible optical signal, on which wavelength division multiplexing has been performed, is used between the wavelength multiplexers/demultiplexers (12 and 22) via the optical fiber transmission line (30).
摘要翻译： 提供了能够在不改变在两个装置中使用的上游光信号和下行光信号的波长的情况下扩展用户装置与站装置之间的传输距离的点对多点光通信系统。 点对多点光通信系统作为其基本配置包括用于将一个站设备（1）连接到多个（n）个用户设备（4）的光网络。 在m个基本配置中，共享一个站侧波长多路复用器/解复用器（22），一个光纤传输线（30）和一个用户侧波长复用器/解复用器（12）。 点对多点光通信系统还包括站侧重复单元（20）和用户侧重复单元（10），每个重复单元包括一个波长多路复用器/解复用器（22或12）和m个波长转换器（21或 11）。 在站设备（1）和站侧重复单元（20）之间以及用户设备（4）和用户侧重复单元（10）之间使用具有传统使用波长的光信号，并且可扩展 通过光纤传输线（30）在波分多路复用器/解复用器（12和22）之间使用已进行波分复用的光信号。
-
-
-
-
-
-
-
-
-
搜索结果
70 条记录 (耗时 0.041 秒)
