公开(公告)号：US08064775B2

公开(公告)日：2011-11-22

申请号：US12183368

申请日：2008-07-31

Applicant: Jianjun Yu ,  Lei Xu ,  Philip Ji ,  Ting Wang ,  Dayou Qian ,  Yutaka Yano

Inventor： Jianjun Yu ,  Lei Xu ,  Philip Ji ,  Ting Wang ,  Dayou Qian ,  Yutaka Yano

IPC: H04B10/04 ,  H04B10/12

CPC classification number: H04B10/5165 ,  H04B10/54 ,  H04B10/548 ,  H04L27/2601

Abstract: A method includes generating at least two lightwave carriers from a lightwave source, the carriers having a wavelength spacing, creating an up-subchannel and a down-subchannel orthogonal to one another and spaced apart based on the fixed wavelength spacing from modulations of the lightwave carriers according to respective up-converted OFDM signals that are carrier suppressed, and combining one lightwave from the up-subchannel and one lightwave from the down-subchannel into an optical channel for transmission over an optical fiber.

Abstract translation: 一种方法包括从光波源产生至少两个光波载波，所述载波具有波长间隔，产生基于与光波载波调制的固定波长间隔彼此正交并且间隔开的向上子信道和下信道 根据载波抑制的各自的上变换的OFDM信号，并将来自上信道的一个光波和来自下信道的一个光波组合成光信道以在光纤上传输。

公开(公告)号：US20110075764A1

公开(公告)日：2011-03-31

申请号：US12841458

申请日：2010-07-22

Applicant: Shu-Hao Fan ,  Jianjun Yu

Inventor： Shu-Hao Fan ,  Jianjun Yu

IPC: H04L7/00 ,  H04L27/00

CPC classification number: H04L27/2657 ,  H04L27/2613 ,  H04L27/2675 ,  H04L27/2697 ,  H04L2027/003

Abstract: A method includes synchronizing a received signal with at least two orthogonal frequency division multiplexed OFDM training signals having only in-phase values and being real in the time domain and determining a frequency offset correction from the synchronization of the received signal and training symbols responsive to a cross-correlation between said training symbols to enable estimating all possible frequency offsets for correction for enabling OFDM demodulation of said received signal.

Abstract translation: 一种方法包括使接收的信号与仅具有同相位值的至少两个正交频分多路复用OFDM训练信号同步并且在时域中为实数，并且响应于一个接收信号和训练符号从接收信号的同步和训练符号确定频率偏移校正 所述训练符号之间的互相关，以便能够估计用于所述接收信号的OFDM解调的校正的所有可能的频率偏移。

公开(公告)号：US20080279556A1

公开(公告)日：2008-11-13

申请号：US12115046

申请日：2008-05-05

Applicant: Jianjun Yu ,  Yuanqiu Luo ,  Junqiang Hu ,  Ting Wang

Inventor： Jianjun Yu ,  Yuanqiu Luo ,  Junqiang Hu ,  Ting Wang

IPC: H04J14/02

CPC classification number: H04B10/2587 ,  H04J14/0282

Abstract: Data is transmitted between a central office and customer premises by a wavelength division multiplex passive optical network. Two laser beams with separate wavelengths are transmitted from the central office to an optical network unit in the customer premises. Both laser beams carry downstream data. One laser beam is intensity modulated by on/off keying. The other laser beam is phase modulated by differential phase shift keying, which maintains a constant optical intensity. The first laser beam is received by a first optical receiver, which demodulates the first downstream data. The second laser beam is split in two. One laser beam is sent to a second optical receiver, which demodulates the second downstream data. The other laser beam is sent to a reflective semiconductor amplifier, which modulates the beam with upstream data and transmits the beam back to a receiver in the central optical system.

Abstract translation: 数据通过波分复用无源光网络在中心局和客户驻地之间传输。 具有分离波长的两个激光束从中心局传输到客户驻地的光网络单元。 两个激光束都携带下行数据。 一个激光束通过开/关键控进行强度调制。 其他激光束通过差分相移键控进行相位调制，保持恒定的光强度。 第一激光束由第一光接收器接收，第一光接收器解调第一下行数据。 第二激光束分为两部分。 一个激光束被发送到第二光接收器，其解调第二下行数据。 另一个激光束被发送到反射半导体放大器，该反射半导体放大器利用上行数据对光束进行调制，并将光束传送回中央光学系统中的接收器。

公开(公告)号：US20080063396A1

公开(公告)日：2008-03-13

申请号：US11690926

申请日：2007-03-26

Applicant: Jianjun Yu ,  Lei Xu ,  Philip Nan Ji ,  Ting Wang

Inventor： Jianjun Yu ,  Lei Xu ,  Philip Nan Ji ,  Ting Wang

IPC: H04B10/24

CPC classification number: H04B10/5561 ,  H04B10/505 ,  H04B10/5051 ,  H04B10/5053 ,  H04B10/5162 ,  H04B10/5165

Abstract: An apparatus includes a generator for obtaining at least two lightwave carriers from a single lightwave source, at least two modulators for selectively varying the lightwave carriers according to respective data signals; and a coupler for combining the modulated lightwave carriers for optical transmission. The generator can be one of an optical carrier suppression or phase modulation. The apparatus can employ a filter for separating the lightwave carriers by a fixed wavelength spacing before selectively varying the lightwave carriers according to the respective data signals. In an exemplary embodiment of the invention, the respective data signals are two 50 Gbit/s differential quadrature phase key DQPSK signals, each 50 Gbit/s DQPSK signal including a first 25 Gbit/s data signal out of phase with a second 25 Gbit/s data signal for selectively varying a respective one of the two lightwave carriers, and the combined modulated lightwave carriers are a 100 Gbit/s DQPSK signal. Preferably, the apparatus includes a modulator for pulse shaping the lightwave carriers.

Abstract translation: 一种装置包括用于从单个光波源获得至少两个光波载波的发生器，至少两个用于根据相应数据信号选择性地改变光波载波的调制器; 以及用于组合用于光传输的调制光波载波的耦合器。 发生器可以是光载波抑制或相位调制之一。 根据相应的数据信号，在选择性地改变光波载波之前，该装置可以采用用于将光波载波分离固定波长间隔的滤波器。 在本发明的示例性实施例中，相应的数据信号是两个50Gbit / s的差分正交相位键DQPSK信号，每个50Gbit / s的DQPSK信号包括与第二25Gbit / s的第二25Gbit / s数据信号异相， 用于选择性地改变两个光波载波中的相应一个的数据信号，并且组合的调制的光波载波是100Gbit / s的DQPSK信号。 优选地，该装置包括用于对光波载波进行脉冲整形的调制器。

公开(公告)号：US20070292143A1

公开(公告)日：2007-12-20

申请号：US11761021

申请日：2007-06-11

Applicant: Jianjun Yu ,  Lei Xu ,  Ting Wang

Inventor： Jianjun Yu ,  Lei Xu ,  Ting Wang

IPC: H04B10/04

CPC classification number: H04B10/25754

Abstract: An apparatus includes multiple signal paths for optically converting an optical signal to multiples of the optical signal at different respective carrier frequencies for reducing interference between wireless transmissions of the multiples of the optical signal. Preferably, the converting includes a first modulator for modulating the optical signal into a first optical carrier and an initial first-order sideband signal with a frequency spacing twice that of the first optical carrier and a first interleaver for separating the first optical carrier and the initial first-order sideband signal. The converting also includes a second phase modulator for modulating the first optical carrier into a second optical carrier and a second first-order sideband signal with a frequency spacing twice that of the second optical carrier.

Abstract translation: 一种装置包括多个信号路径，用于将光信号光学地转换成不同相应载波频率处的光信号的倍数，以减少光信号的倍数的无线传输之间的干扰。 优选地，转换包括用于将光信号调制成第一光载波的第一调制器和具有两倍于第一光载波的频率间隔的初始一阶边带信号和用于分离第一光载波的初始交织器和初始 一阶边带信号。 转换还包括用于将第一光载波调制成第二光载波的第二相位调制器和频率间隔是第二光载波的频率间隔的第二一阶边带信号。

公开(公告)号：US20060071612A1

公开(公告)日：2006-04-06

申请号：US10543952

申请日：2004-01-14

Applicant: Paul Veldman ,  Bernhard Van Dijk ,  Jianjun Yu

Inventor： Paul Veldman ,  Bernhard Van Dijk ,  Jianjun Yu

IPC: H05B41/16

CPC classification number: H05B41/2828 ,  Y10S315/05 ,  Y10S315/07

Abstract: In a bride circuit comprising a lamp choke that might partially saturate during the ignition of the lamp, at least one of the switches is switched off when the amount of charge displaced through it in forward direction equals a predetermined value. Despite the partial paturation of the lamp choke the amplitude of the ignition voltage is thereby effectively controlled.

Abstract translation: 在包括在灯的点火期间可能部分饱和的灯扼流圈的新电路中，当正向移动的电荷量等于预定值时，至少一个开关被切断。 尽管灯扼流圈的部分校正，因此有效地控制了点火电压的幅度。

公开(公告)号：US09825707B2

公开(公告)日：2017-11-21

申请号：US14377685

申请日：2013-02-08

Applicant: ZTE (USA) Inc. ,  Jianjun Yu ,  Jianqiang Li ,  Hung-chang Chien ,  Zhensheng Jia

Inventor： Jianjun Yu ,  Jianqiang Li ,  Hung-Chang Chien ,  Zhensheng Jia

IPC: H04B10/2507 ,  H04B1/50 ,  H04B10/548 ,  H04L27/26 ,  H04L27/20 ,  H04L25/03 ,  H04J14/02 ,  H04B10/50

CPC classification number: H04B10/2507 ,  H04B10/50 ,  H04B10/548 ,  H04J14/0298 ,  H04L25/03178 ,  H04L27/2096 ,  H04L27/2601 ,  H04L27/2627 ,  H04L27/2697 ,  H04L2025/03414

Abstract: Aspects of the present invention include apparatus and methods for transmitting and receiving signals in communication systems. A multicarrier generator generates a multicarrier signal. An optical demultiplexer separates the multicarrier signal into separate multicarrier signals. At least one QPSK modulator modulates signals from the separate multicarrier signals. An optical multiplexer combines the QPSK modulated signals into a multiplexed signal. The multiplexed signal is then transmitted.

公开(公告)号：US09312979B2

公开(公告)日：2016-04-12

申请号：US14238464

申请日：2012-08-10

Applicant: Jianjun Yu

Inventor： Jianjun Yu

IPC: H04B10/556 ,  H04J14/02 ,  H04L5/00 ,  H04L27/26

CPC classification number: H04J14/0221 ,  H04B10/556 ,  H04L5/0048 ,  H04L27/2601 ,  H04L27/2613

Abstract: Techniques for optical communications using optical orthogonal frequency division multiplexing (OFDM) include operating a signal transmitter to modulate laser light to produce modulated light that carries, in optical domain, OFDM subcarriers for carrying communication information, without a frequency guard band between the OFDM subcarriers, and pilot subcarriers for channel estimation at a signal receiver, each pilot subcarrier being free of communication information, and controlling optical power of the pilot subcarriers to vary with optical frequencies of the pilot subcarriers so that optical power of a pilot subcarrier at a high optical frequency is different from optical power of another pilot subcarrier at a low optical frequency.

Abstract translation: 使用光学正交频分复用（OFDM）的光通信技术包括操作信号发射机以调制激光以产生在光域中携带用于承载通信信息的OFDM子载波而不在OFDM子载波之间的频率保护带的调制光， 以及在信号接收机处进行信道估计的导频子载波，每个导频子载波没有通信信息，并且控制导频子载波的光功率随着导频子载波的光频率而变化，使得在高光频率下的导频子载波的光功率 与另一导频子载波的光功率不同，在低光频率。

公开(公告)号：US09294199B2

公开(公告)日：2016-03-22

申请号：US14343725

申请日：2012-09-13

Applicant: Hung-Chang Chien ,  Jianjun Yu ,  Ze Dong

Inventor： Hung-Chang Chien ,  Jianjun Yu ,  Ze Dong

IPC: H04B10/04 ,  H04B10/516 ,  H04J14/06 ,  H04B10/508 ,  H04J14/00 ,  H04B10/524

CPC classification number: H04B10/5162 ,  H04B10/508 ,  H04B10/524 ,  H04J14/002 ,  H04J14/06

Abstract: An optical transmitter comprises: first and second sets of optical in-phase and quadrature modulators; an integrable tunable laser assembly; a first polarization beam splitter that is configured to divide the continuous-waveform optical signal into a x-polarized tributary and a y-polarized tributary, each of the x-polarized tributary and the y-polarized tributary is modulated by one of the first and second sets of optical in-phase and quadrature modulators in accordance with the two respective input signals; a second polarization beam splitter that is configured to combine the modulated x-polarized tributary and the modulated y-polarized tributary into one optical signal; and an optical modulator that is configured to modulate the combined optical signal using a driving voltage, wherein the driving voltage has a bias point that is reduced by a predefined offset from a predefined reference voltage level.

Abstract translation: 光发射机包括：第一和第二组光同步和正交调制器; 可集成可调激光器组件; 第一偏振分束器，被配置为将连续波形光信号划分成x偏振支路和y偏振支路，x偏振支路和y偏振支路中的每一个由第一和/ 根据两个相应的输入信号的第二组光同步和正交调制器; 第二偏振分束器，被配置为将调制的x偏振支路和调制的y偏振支路组合成一个光信号; 以及光学调制器，其被配置为使用驱动电压来调制所述组合的光信号，其中所述驱动电压具有被减小预定义的偏离预定参考电压电平的偏置点。

公开(公告)号：US20140105615A1

公开(公告)日：2014-04-17

申请号：US14113012

申请日：2012-04-25

Applicant: Hung-Chang Chien ,  Jianjun Yu

Inventor： Hung-Chang Chien ,  Jianjun Yu

IPC: H04B10/548

CPC classification number: H04B10/548

Abstract: A method and apparatus for generating sub-carriers is disclosed. Coherent optical sub-carriers with sub-carrier spacing are generated for carrying an orthogonal frequency division multiplexed (OFDM) signal. Multiple peaks are generated by cascading multiple phase modulators driven by different radio frequency sources.

Abstract translation: 公开了一种用于生成副载波的方法和装置。 产生具有副载波间隔的相干光子载波，用于承载正交频分复用（OFDM）信号。 通过级联由不同射频源驱动的多个相位调制器产生多个峰值。