公开(公告)号：US08761612B2

公开(公告)日：2014-06-24

申请号：US12562260

申请日：2009-09-18

申请人： Jianjun Yu ,  Ting Wang ,  Dayou Qian

发明人： Jianjun Yu ,  Ting Wang ,  Dayou Qian

IPC分类号： H04B10/00

CPC分类号： H04B10/5053 ,  H04B10/541

摘要： An optical transmitter includes a dividing optical coupler, a first optical modulator driven by an I component of a first signal and a I component of a second signal for modulating a lightwave, a DC bias of the first optical, a second optical modulator driven by a Q component of the first signal and a Q component of the second signal for modulating a lightwave, a DC bias of the second optical modulator, a phase shifter, and a combining optical coupler for combining the modulated lightwave from the first optical coupler and the phase shifted Q components of the first and second signals for generating a quadrature amplitude modulated signal.

摘要翻译： 光发射机包括分光光耦合器，由第一信号的I分量驱动的第一光调制器和用于调制光波的第二信号的I分量，第一光学器件的DC偏置，第二光调制器驱动的第二光调制器 第一信号的Q分量和用于调制光波的第二信号的Q分量，第二光调制器的DC偏置，移相器和组合光耦合器，用于组合来自第一光耦合器的调制光波和相位 用于产生正交幅度调制信号的第一和第二信号的移位Q分量。

公开(公告)号：US08724998B2

公开(公告)日：2014-05-13

申请号：US13478892

申请日：2012-05-23

申请人： Lei Xu ,  Dayou Qian ,  Ting Wang

发明人： Lei Xu ,  Dayou Qian ,  Ting Wang

IPC分类号： H04B10/04 ,  H04J14/00

CPC分类号： H04L5/0012 ,  H04L5/0008 ,  H04L27/2642 ,  H04L27/2647

摘要： Methods and systems for secure communication include assigning data streams to respective orthogonal sub-carriers according to random number information at a transmitter. The data streams are modulated onto the respective orthogonal sub-carriers before the orthogonal sub-carriers are transmitted. The random number information is transmitted on a second medium, separate from the transmission medium. The orthogonal sub-carriers are received from the transmission medium at a receiver, while the random number information is received from the second medium at the receiver. The orthogonal sub-carriers are associated with data streams using the random number information and demodulated to produce data for the associated data stream.

摘要翻译： 用于安全通信的方法和系统包括根据发射机处的随机数信息将数据流分配给各个正交子载波。 在发送正交子载波之前，将数据流调制到各个正交子载波上。 在与传输介质分离的第二介质上发送随机数信息。 在接收机处从传输介质接收正交子载波，而在接收机处从第二媒体接收随机数信息。 正交子载波与使用随机数信息的数据流相关联并被解调以产生用于相关联的数据流的数据。

公开(公告)号：US08718474B2

公开(公告)日：2014-05-06

申请号：US13267131

申请日：2011-10-06

申请人： Dayou Qian ,  Junqiang Hu ,  Ting Wang ,  Yoshiaki Aono ,  Tsutomu Tajima

发明人： Dayou Qian ,  Junqiang Hu ,  Ting Wang ,  Yoshiaki Aono ,  Tsutomu Tajima

IPC分类号： H04B10/00 ,  H04J14/02 ,  H04B10/04

CPC分类号： H04B10/25133

摘要： Methods and devices for compensating for chromatic dispersion are shown that include receiving an input data signal, applying a filter to the data signal, and outputting a CD compensated signal. Applying the filter includes convolving known filter coefficients with a plurality of delayed versions of the data signal using addition and at least one inverse sign operation or using lookup tables and combining outputs to produce a CD compensated signal.

摘要翻译： 示出了用于补偿色散的方法和装置，其包括接收输入数据信号，向数据信号施加滤波器，以及输出CD补偿信号。 应用滤波器包括使用加法和至少一个逆符号操作或使用查找表并组合输出以产生CD补偿信号的具有多个延迟版本的数据信号的已知滤波器系数。

公开(公告)号：US08615171B2

公开(公告)日：2013-12-24

申请号：US13077748

申请日：2011-03-31

申请人： Neda Cvijetic ,  Narayan Prasad ,  Dayou Qian ,  Ting Wang

发明人： Neda Cvijetic ,  Narayan Prasad ,  Dayou Qian ,  Ting Wang

IPC分类号： H04B10/00

CPC分类号： H04L25/0208 ,  H04J14/06 ,  H04L25/022 ,  H04L25/024 ,  H04L27/2647

摘要： A method for joint transmitter and receiver processing for computationally efficient equalization in polarization multiplexed (POLMUX) optical orthogonal frequency division multiplexed (OFDM) transmission with direct detection.

摘要翻译： 一种用于在具有直接检测的偏振复用（POLMUX）光学正交频分复用（OFDM）传输中的计算上有效均衡的联合发射机和接收机处理方法。

公开(公告)号：US08358936B2

公开(公告)日：2013-01-22

申请号：US12562251

申请日：2009-09-18

申请人： Jianjun Yu ,  Lei Xu ,  Dayou Qian ,  Ting Wang

发明人： Jianjun Yu ,  Lei Xu ,  Dayou Qian ,  Ting Wang

IPC分类号： H04B10/04 ,  H04B10/12

CPC分类号： H04B10/50

摘要： An optical apparatus includes a quadrature phase shift keying modulator for generating a non-return-to-zero quadrature phase shift keyed NRZ-QPSK signal from a received lightwave, the modulator being driven by a radio frequency RF signal, an intensity modulator for carving the NRZ-QPSK signal to return-to-zero RZ pulses with a different duty cycle than that of the NRZ-QPSK, the intensity modulator being driven by a radio frequency RF clock signal to change the NRZ-QPSK to an RZ-QPSK signal, and an optical filter with a narrow band for filtering the signal from the intensity modulator to increase optical power that is useable by an optical digital coherent detection system.

摘要翻译： 光学装置包括：正交相移键控调制器，用于从接收到的光波产生不归零正交相移键控的NRZ-QPSK信号，调制器由射频RF信号驱动;强度调制器，用于雕刻 NRZ-QPSK信号以与NRZ-QPSK的占空比不同的占空比的归零RZ脉冲，强度调制器由射频RF时钟信号驱动，以将NRZ-QPSK改变为RZ-QPSK信号， 以及具有窄带的滤光器，用于对来自强度调制器的信号进行滤波，以增加可由光学数字相干检测系统使用的光功率。

公开(公告)号：US08233809B2

公开(公告)日：2012-07-31

申请号：US12607125

申请日：2009-10-28

申请人： Dayou Qian ,  Ting Wang ,  Kai Yang ,  Junqiang Hu

发明人： Dayou Qian ,  Ting Wang ,  Kai Yang ,  Junqiang Hu

IPC分类号： H04B10/06

CPC分类号： H04J14/002 ,  H04B10/2513 ,  H04B10/60 ,  H04B10/6161 ,  H04B10/6162 ,  H04J14/06

摘要： A method for the polarization independent frequency domain equalization (FDE) chromatic dispersion compensation on polarization multiplexing (POLMUX) coherent systems. Operationally, time domain signals are converted to frequency domain signals such that time domain convolution can be done as simple multiplications in the frequency domain. These frequency domain signals then converted back to time domain for subsequent use. The input signal size and FFT size are advantageously designed so that the output signals can be continuous with some overlap between two successive frames.

摘要翻译： 一种用于偏振复用（POLMUX）相干系统上的偏振独立频域均衡（FDE）色散补偿的方法。 在操作上，时域信号被转换成频域信号，使得时域卷积可以作为频域中的简单乘法来完成。 然后，这些频域信号被转换回到时域以供后续使用。 有利地设计输入信号尺寸和FFT尺寸，使得输出信号可以是连续的，在两个连续帧之间具有一些重叠。

公开(公告)号：US08184731B2

公开(公告)日：2012-05-22

申请号：US12372378

申请日：2009-02-17

申请人： Dayou Qian ,  Jianjun Yu ,  Ting Wang

发明人： Dayou Qian ,  Jianjun Yu ,  Ting Wang

IPC分类号： H04L5/12

CPC分类号： H04L27/233

摘要： A system and method to adjust the symbol constellation used to de-map a signal in an optical coherent communications system. A feedback de-mapper adjustment module is configured to compare average Error Vector Magnitude and Bit Error Ratio to a pre-defined table to determine when a constellation de-mapper mismatch occurs. The feedback de-mapper adjustment module then rotates the de-mapper constellation in order to compensate for phase drift.

摘要翻译： 一种用于调整用于在光学相干通信系统中去映射信号的符号星座的系统和方法。 反馈解映射器调整模块被配置为将平均误差矢量幅度和误码率与预定义的表进行比较，以确定何时发生星座解映射器失配。 反馈解映射器调整模块随后旋转去映射器星座以便补偿相位漂移。

公开(公告)号：US08000604B2

公开(公告)日：2011-08-16

申请号：US12039981

申请日：2008-02-29

申请人： Dayou Qian ,  Junqiang Hu ,  Jianjun Yu ,  Philip Nan Ji ,  Lei Xu ,  Ting Wang ,  Milorad Cvijetic ,  Toshihiko Kusano

发明人： Dayou Qian ,  Junqiang Hu ,  Jianjun Yu ,  Philip Nan Ji ,  Lei Xu ,  Ting Wang ,  Milorad Cvijetic ,  Toshihiko Kusano

IPC分类号： H04J14/02

CPC分类号： H04L5/023 ,  H04J14/0226 ,  H04J14/0227 ,  H04J14/0246 ,  H04J14/0247 ,  H04J14/025 ,  H04J14/0252 ,  H04J14/0282 ,  H04J14/0298 ,  H04L5/0007

摘要： A passive optical network (PON) device, system and method include an optical line terminal (OLT) receiver configured to receive multiple signals at different wavelengths simultaneously and enable multiple transmitters to operate at the same time during one upstream time slot. The optical line terminal employs Orthogonal Frequency Division Multiple Access (OFDMA) to transparently support a plurality of applications and enable dynamic bandwidth allocation among these applications where the bandwidth is allocated in two dimensional frequency and time space.

摘要翻译： 无源光网络（PON）设备，系统和方法包括配置为同时接收不同波长的多个信号的光线路终端（OLT）接收机，并使得多个发射机能够在一个上行时隙同时进行操作。 光线路终端使用正交频分多址（OFDMA）来透明地支持多个应用，并且在带宽被分配在二维频率和时间空间中的这些应用中实现动态带宽分配。

公开(公告)号：US20110020003A1

公开(公告)日：2011-01-27

申请号：US12789943

申请日：2010-05-28

申请人： Jianjun Yu ,  Dayou Qian ,  Philip Nan Ji ,  Ting Wang

发明人： Jianjun Yu ,  Dayou Qian ,  Philip Nan Ji ,  Ting Wang

IPC分类号： H04J14/02 ,  H04B10/04

CPC分类号： H04B10/548 ,  H04J14/06

摘要： A method for generating a 400 Gb/s single channel optical signal from multiple modulated subchannels includes carving respective modulated subchannels into return-to-zero RZ modulated subchannels having non-overlapping peaks with intensity modulators having a duty cycle less than 50%, and combining the subchannels into a single channel signal aggregating the bit rate of each of the subchannels. The subchannels are combined with a flat top optical component for increased subsequent receiver sensitivity.

摘要翻译： 用于从多个调制子信道生成400Gb / s单信道光信号的方法包括将具有非重叠峰值的相应调制子信道刻蚀成具有占空比小于50％的强度调制器的归零至零RZ调制子信道，以及组合 将子信道转换成单个信道信号，聚合每个子信道的比特率。 子通道与平顶光学部件组合，以增加后续的接收灵敏度。

公开(公告)号：US20100028002A1

公开(公告)日：2010-02-04

申请号：US12184781

申请日：2008-08-01

申请人： Dayou Qian ,  Junqiang Hu ,  Philip Nan Ji ,  Ting Wang

发明人： Dayou Qian ,  Junqiang Hu ,  Philip Nan Ji ,  Ting Wang

IPC分类号： H04J14/02

CPC分类号： H04Q11/0067 ,  H04J14/0227 ,  H04J14/025 ,  H04J14/0282 ,  H04J14/0298 ,  H04L5/0007 ,  H04L5/0037 ,  H04Q2011/0086

摘要： Implementations of the present principles include methods, systems and apparatuses for transmitting data through a sub-carrier multiplexing and orthogonal frequency-division multiple access passive optical network. In accordance with aspects of the present principles, a plurality of optical network units are assigned electrical carrier frequency bandwidths that are narrower than a system capacity bandwidth. Modulation of optical waves transmitted between an optical line terminal and each optical network unit is conducted on different orthogonal sub-carrier frequencies within the assigned bandwidths such that sampling of said orthogonal sub-carrier frequencies is limited to the assigned electrical carrier frequency bandwidths. The waves are thereafter received and demodulated for the extraction of data.

摘要翻译： 本原理的实现包括通过副载波复用和正交频分多址无源光网络传输数据的方法，系统和装置。 根据本原理的方面，多个光网络单元分配比系统容量带宽窄的电载波频率带宽。 在光线路终端和每个光网络单元之间传输的光波的调制在所分配的带宽内的不同正交子载波频率上进行，使得所述正交子载波频率的采样被限制为所分配的电载波频率带宽。 之后接收和解调波以提取数据。