公开(公告)号：US20080253768A1

公开(公告)日：2008-10-16

申请号：US12060351

申请日：2008-04-01

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

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

IPC: H04J14/00

CPC classification number: H04J14/0227 ,  H04B10/5165 ,  H04B10/54 ,  H04B10/5561 ,  H04J14/0246 ,  H04J14/0279 ,  H04L5/0005 ,  H04L5/0044 ,  H04L5/0053 ,  H04L27/02

Abstract: Optical packets are generated by generating a first optical beam with a first wavelength and a second optical beam with a second optical beam. The first optical beam is modulated with a payload signal and then filtered to reduce the bandwidth of the signal. The second optical beam is modulated with a label signal. The filtered modulated first optical beam and modulated second optical beam are combined to generate a dual-wavelength optical beam.

Abstract translation: 通过产生具有第一波长的第一光束和具有第二光束的第二光束来产生光学分组。 用有效载荷信号调制第一个光束，然后滤波以减少信号的带宽。 用标签信号调制第二光束。 经过滤波的调制的第一光束和调制的第二光束被组合以产生双波长光束。

公开(公告)号：US07373089B2

公开(公告)日：2008-05-13

申请号：US10215460

申请日：2002-08-09

Applicant: Jianjun Yu ,  Keisuke Kojima ,  Naresh Chand

Inventor： Jianjun Yu ,  Keisuke Kojima ,  Naresh Chand

IPC: H04B10/04 ,  H04B10/12

CPC classification number: H04B10/25137

Abstract: Methods and apparatus for providing improving optical signal transmission results over standard mode fiber using a combination of negative chirp, low extinction ratio, and self-phase modulation transmission techniques in combination are described. The use of pre-transmission signal distortion in combinations with one or more of the other transmission techniques is also described. Pre-transmission signal distortion may be introduced by controlling a modulator with a large symmetric AC signal which causes the modulator to operation in a non-linear region or, alternatively, by using a relatively small non-symmetric AC signal to drive the modulator. Use of the small non-symmetric signal has the advantage of reduced power requirements. The pre-transmission distortion acts to counter some of the distortion introduced by the transmission of the signal over an optic fiber.

Abstract translation: 描述了结合使用负啁啾，低消光比和自相位调制传输技术的组合的标准模式光纤提供改进的光信号传输结果的方法和装置。 还描述了与一种或多种其它传输技术组合使用预发射信号失真。 可以通过控制具有大对称AC信号的调制器来引入预发送信号失真，其使得调制器在非线性区域中操作，或者通过使用相对较小的非对称AC信号来驱动调制器。 使用小的非对称信号具有减少功率要求的优点。 预发射失真用于抵消通过光纤传输信号引入的一些失真。

公开(公告)号：US20070166054A1

公开(公告)日：2007-07-19

申请号：US11621765

申请日：2007-01-10

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

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

IPC: H04B10/04

CPC classification number: H04B10/508 ,  H04B10/2575 ,  H04B10/505 ,  H04J14/02 ,  H04J14/0256

Abstract: A method of generating a dark-RZ pulse in an optical communications system with a dual-arm modulator by setting a direct current bias on the modulator to a specific value such that an output optical power from the modulator achieves a maximum value when the RF signals on the first and second arms of the modulator are off and maintaining the direct current bias at the specific value and applying RF signals to the first and second arms of the modulator and delaying one of the RF signals applied to one of the first and second arms relative to the other of the RF signals such that a dark-RZ pulse is generated with a duty cycle based on the delay. Another aspect of the invention provides a method for generating dense wave division multiplexing (DWDM) optical mm-waves in an optical transmission system by phase modulated DWDM optical signal and applying the phase modulated DWDM optical signal to an input port of an optical interleaver, the optical interleaver having a specified bandwidth to suppress the optical carriers and convert the DWDM optical signal to DWDM optical mm-waves; and amplifying the DWDM optical mm-waves and transmitting the DWDM optical mm-waves over single mode fiber (SMF).

Abstract translation: 一种在具有双臂调制器的光通信系统中通过将调制器上的直流偏置设置为特定值来产生暗RZ脉冲的方法，使得来自调制器的输出光功率在RF信号 在调制器的第一和第二臂处关闭并将直流偏压保持在特定值并且将RF信号施加到调制器的第一和第二臂并且延迟施加到第一和第二臂之一的RF信号之一 相对于RF信号中的另一个，使得以基于延迟的占空比产生暗RZ脉冲。 本发明的另一方面提供了一种通过相位调制DWDM光信号在光传输系统中产生密集波分复用（DWDM）光学毫米波的方法，并将相位调制的DWDM光信号应用于光交织器的输入端口， 具有指定带宽的光交错器以抑制光载波并将DWDM光信号转换为DWDM光学毫米波; 并放大DWDM光学毫米波，并通过单模光纤（SMF）传输DWDM光学毫米波。

公开(公告)号：US20140233964A1

公开(公告)日：2014-08-21

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: H04B10/516 ,  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：US20130259491A1

公开(公告)日：2013-10-03

申请号：US13991068

申请日：2010-12-01

Applicant: Jianjun Yu

Inventor： Jianjun Yu

IPC: H04L1/00

CPC classification number: H04L1/0011 ,  H03M13/2957 ,  H03M13/31 ,  H03M13/6362 ,  H04L1/0013 ,  H04L1/0041 ,  H04L1/0066 ,  H04L1/0068 ,  H04L1/04 ,  H04L27/2634 ,  H04L27/2697

Abstract: A system and method for improving receiver sensitivity of an DD-OFDM system without using frequency guard band. The method having: interleaving input data to the DD-OFDM system to generate interleaved data; encoding the input data with a first recursive systematic convolutional code to generate a first recursive systematic convolutional encoded data; encoding the interleaved data with a second recursive systematic convolutional code to generate a second recursive systematic convolutional encoded data; puncturing the first recursive systematic convolutional encoded data and the second recursive systematic convolutional encoded data to generate a parity sequence; and combining the input data with the parity sequence to generate coded DD-OFDM data; wherein the parity sequence is generated by using different puncturing rates for different OFDM subcarriers, so as to obtain higher spectral efficiency.

Abstract translation: 一种用于在不使用频率保护频带的情况下改善DD-OFDM系统的接收机灵敏度的系统和方法。 该方法具有：将输入数据交织到DD-OFDM系统以产生交错数据; 用第一递归系统卷积码对输入数据进行编码，以产生第一递归系统卷积编码数据; 用第二递归系统卷积码对交织数据进行编码，以生成第二递归系统卷积编码数据; 刺穿第一递归系统卷积编码数据和第二递归系统卷积编码数据以产生奇偶校验序列; 并将输入数据与奇偶校验序列组合以产生编码的DD-OFDM数据; 其中通过对不同OFDM子载波使用不同的打孔率来生成奇偶校验序列，以便获得更高的频谱效率。

公开(公告)号：US08385494B2

公开(公告)日：2013-02-26

申请号：US12841458

申请日：2010-07-22

Applicant: Shu-Hao Fan ,  Jianjun Yu

Inventor： Shu-Hao Fan ,  Jianjun Yu

IPC: H04L7/04

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：US20130028603A1

公开(公告)日：2013-01-31

申请号：US13556928

申请日：2012-07-24

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

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

IPC: H04J14/06

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

Abstract: An optical signal transmitting system, comprising: an optical transmitter including one or more input terminals and an output terminal; and a temporal polarization interleaver including an input terminal and an output terminal, wherein the output terminal of the optical transmitter is communicatively coupled to the input terminal of the temporal polarization interleaver, wherein: the optical transmitter is configured to receive one or more input signals through its one or more input terminals, generate an output signal using the one or more input signals, the output signal including a x-polarized tributary and a y-polarized tributary that is pulse-to-pulse aligned with the x-polarized tributary, and transmit the output signal to the temporal polarization interleaver; and the temporal polarization interleaver is configured to receive the output signal from the optical transmitter and cause a predefined phase delay to one of the x-polarized tributary and the y-polarized tributary.

Abstract translation: 一种光信号传输系统，包括：光发射机，包括一个或多个输入端和一输出端; 以及包括输入端和输出端的时间偏振交织器，其中所述光发送器的输出端通信地耦合到所述时间偏振交织器的输入端，其中：所述光发送器被配置为通过以下方式接收一个或多个输入信号： 其一个或多个输入端子使用一个或多个输入信号产生输出信号，该输出信号包括与x偏振支路脉冲对脉冲对准的x偏振支路和y偏振支路，以及 将输出信号发送到时间偏振交织器; 并且时间偏振交织器被配置为从光发射器接收输出信号，并且对x偏振支流和y偏振支路之一引起预定的相位延迟。

公开(公告)号：US08358933B2

公开(公告)日：2013-01-22

申请号：US12562353

申请日：2009-09-18

Applicant: Jianjun Yu ,  Ting Wang

Inventor： Jianjun Yu ,  Ting Wang

IPC: H04B10/00

CPC classification number: H04B10/90 ,  H04B10/25759

Abstract: An optical wireless network includes an optical coupler for diverting received millimeter-wave signals comprised of an optical carrier and second order sidebands into multiple transmission paths; a downstream optical path being one of the multiple transmission paths and including an optical filter for filtering passing through the optical carrier with a single sideband, a converter for converting the optical carrier and single sideband to a corresponding electrical signal for amplification and broadcast transmission from an antenna; and an upstream path being one of the multiple transmission paths and having a filter for passing through the optical carrier only from the mm-wave signals and an intensity modulator driven by data received over the antenna to modulate the optical carrier for optical transmission to a receiving destination.

Abstract translation: 光无线网络包括用于将接收到的由光载波和二阶边带构成的毫米波信号转换成多个传输路径的光耦合器; 下行光路是多个传输路径之一，并且包括用于通过单个边带通过光载波的滤波器的滤光器，用于将光载波和单边带转换为相应的电信号的转换器，用于放大和广播传输 天线; 并且上游路径是多个传输路径中的一个，并且具有仅从mm波信号通过光载波的滤波器和由天线接收的数据驱动的强度调制器，以将用于光传输的光载波调制到接收 目的地。

公开(公告)号：US20120321320A1

公开(公告)日：2012-12-20

申请号：US13494227

申请日：2012-06-12

Applicant: Jianjun Yu

Inventor： Jianjun Yu

IPC: H04J14/00

CPC classification number: H04L27/2697 ,  H04B10/548 ,  H04J14/0298

Abstract: The present method includes providing a continuous wave CW optical source with a fixed frequency spacing, separating multiple wavelengths of said CW optical source into different channels, modulating the multiple wavelengths of the CW optical source to generate an OFDM electrical signal with multiple sub-channels and each sub-channel has a channel subcarrier spacing , mixing the OFDM electrical signal with a radio frequency RF sinusoidal signal at a frequency ξf by an electrical mixer and generating a double sideband optical signal, filtering the double sideband signal to generate a single sideband optical signal, combining all channels of the single sideband optical signal, and directly detecting each sub-band of the single sideband optical OFDM signal with a respective detector, the detector converting the optical signal to an electrical signal for digital signal processing.

Abstract translation: 本方法包括提供具有固定频率间隔的连续波CW源，将所述CW光源的多个波长分离成不同的信道，调制CW光源的多个波长以产生具有多个子信道的OFDM电信号， 每个子信道具有信道子载波间隔，通过电混频器将OFDM电信号与频率为xgr f的射频RF正弦信号混合并产生双边带光信号，对双边带信号进行滤波以产生单个边带 光信号，组合单边带光信号的所有信道，并用相应检测器直接检测单边带光OFDM信号的每个子带，检测器将光信号转换为电信号进行数字信号处理。

公开(公告)号：US20120321248A1

公开(公告)日：2012-12-20

申请号：US13492775

申请日：2012-06-08

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

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

IPC: G02B6/26

CPC classification number: G02B6/26 ,  H04B10/516 ,  H04J14/00 ,  H04J14/02

Abstract: Methods and devices are provided to facilitate production of optical signals that exhibit reduced crosstalk noise and intersymbol interference. In some configurations, a multi-stage optical interleaver, including a first and a second optical interleaver, is used to process a first and a second set of input optical channels. The composite optical output of the multi-stage interleaver includes the first set of optical channels and the second set of optical channels, where each of the first and second set of input optical channels is processed once by the first optical interleaver and once by the second optical interleaver. As such, the first and second sets of input optical channels are each filtered twice using only two optical interleavers.

Abstract translation: 提供了方法和装置，以便于生产表现出减少的串扰噪声和符号间干扰的光信号。 在一些配置中，使用包括第一和第二光交织器的多级光交织器来处理第一和第二组输入光信道。 多级交织器的复合光输出包括第一组光通道和第二组光通道，其中第一和第二组输入光通道中的每一个由第一光交错器处理一次，一次由第二组 光学交织器。 这样，第一组和第二组输入光通道每个仅使用两个光交错器进行两次滤波。