公开(公告)号：US20070133987A1

公开(公告)日：2007-06-14

申请号：US11276486

申请日：2006-03-02

申请人： Lei Xu ,  Lei Zong ,  Philip Ji ,  Ting Wang ,  Yuji Abe

发明人： Lei Xu ,  Lei Zong ,  Philip Ji ,  Ting Wang ,  Yuji Abe

IPC分类号： H04J14/00

CPC分类号： H04J14/0226 ,  H04B10/40 ,  H04J14/0232 ,  H04J14/0247 ,  H04J14/0252 ,  H04J14/0282 ,  H04J14/0298

摘要： An optical triplexer transceiver that utilizes parallel signal detection for use in broadband passive optical networks (B-PONs). The triplexer transceiver includes an optical filter comprising a first port coupled to a laser for receiving upstream optical data signals, a second port for passing the upstream optical data signals to a network, and for receiving combined downstream optical data and video signals from the network, the video signals modulated by subcarrier modulation (SCM), and a third port for communicating the combined downstream optical data and video signals to a photodetector constructed and arranged for simultaneously receiving the combined downstream optical data and video signals and converting the optical data and video signals to electrical signals. A plurality of filters are coupled to the photodetector for separating the combined downstream data and video signals, including a low-pass filter for passing the downstream data signals, and a band-pass filter for passing the video signals. The video signals are coherently detected in a number of stages corresponding to stages of SCM applied to the video signals. The triplexer transceiver is adapted to receive optical video signals that have been subjected first and second stages of SCM to move the spectra of the SCM video signals to a higher frequency range that does not overlap with a frequency range of the baseband data signals.

摘要翻译： 一种使用并行信号检测用于宽带无源光网络（B-PON）的光学三重收发器。 三重收发器包括光滤波器，其包括耦合到激光器的第一端口用于接收上游光数据信号，用于将上游光数据信号传递到网络的第二端口，以及用于从网络接收组合的下行光数据和视频信号， 通过副载波调制（SCM）调制的视频信号和用于将组合的下行光数据和视频信号传送到光电探测器的第三端口，该光电探测器被构造和布置成同时接收组合的下行光数据和视频信号并转换光数据和视频信号 到电信号。 多个滤波器耦合到光电检测器，用于分离组合的下行数据和视频信号，包括用于通过下行数据信号的低通滤波器和用于传递视频信号的带通滤波器。 视频信号在对应于应用于视频信号的单片机的阶段的多个级中被相干检测。 三重收发器适于接收已经经历SCM的第一和第二级的光学视频信号，以将SCM视频信号的频谱移动到与基带数据信号的频率范围不重叠的较高频率范围。

公开(公告)号：US07529484B2

公开(公告)日：2009-05-05

申请号：US11276486

申请日：2006-03-02

申请人： Lei Xu ,  Lei Zong ,  Philip Nan Ji ,  Ting Wang ,  Yuji Abe

发明人： Lei Xu ,  Lei Zong ,  Philip Nan Ji ,  Ting Wang ,  Yuji Abe

IPC分类号： H04J14/00 ,  H04J14/02

CPC分类号： H04J14/0226 ,  H04B10/40 ,  H04J14/0232 ,  H04J14/0247 ,  H04J14/0252 ,  H04J14/0282 ,  H04J14/0298

摘要： An optical triplexer transceiver that utilizes parallel signal detection for use in broadband passive optical networks (B-PONs). The triplexer transceiver includes an optical filter comprising a first port coupled to a laser for receiving upstream optical data signals, a second port for passing the upstream optical data signals to a network, and for receiving combined downstream optical data and video signals from the network, the video signals modulated by subcarrier modulation (SCM), and a third port for communicating the combined downstream optical data and video signals to a photodetector constructed and arranged for simultaneously receiving the combined downstream optical data and video signals and converting the optical data and video signals to electrical signals. A plurality of filters are coupled to the photodetector for separating the combined downstream data and video signals, including a low-pass filter for passing the downstream data signals, and a band-pass filter for passing the video signals. The video signals are coherently detected in a number of stages corresponding to stages of SCM applied to the video signals. The triplexer transceiver is adapted to receive optical video signals that have been subjected first and second stages of SCM to move the spectra of the SCM video signals to a higher frequency range that does not overlap with a frequency range of the baseband data signals.

摘要翻译： 一种使用并行信号检测用于宽带无源光网络（B-PON）的光学三重收发器。 三重收发器包括光滤波器，其包括耦合到激光器的第一端口用于接收上游光数据信号，用于将上游光数据信号传递到网络的第二端口，以及用于从网络接收组合的下行光数据和视频信号， 通过副载波调制（SCM）调制的视频信号和用于将组合的下行光数据和视频信号传送到光电探测器的第三端口，该光电探测器被构造和布置成同时接收组合的下行光数据和视频信号并转换光数据和视频信号 到电信号。 多个滤波器耦合到光电检测器，用于分离组合的下行数据和视频信号，包括用于通过下行数据信号的低通滤波器和用于传递视频信号的带通滤波器。 视频信号在对应于应用于视频信号的单片机的阶段的多个级中被相干检测。 三重收发器适于接收已经经历SCM的第一和第二级的光学视频信号，以将SCM视频信号的频谱移动到与基带数据信号的频率范围不重叠的较高频率范围。

公开(公告)号：US20060232848A1

公开(公告)日：2006-10-19

申请号：US11279767

申请日：2006-04-14

申请人： Lei Xu ,  Ting Wang ,  Philip Ji ,  Lei Zong ,  Milorad Cvijetic

发明人： Lei Xu ,  Ting Wang ,  Philip Ji ,  Lei Zong ,  Milorad Cvijetic

IPC分类号： G02F2/00

CPC分类号： H04B10/66

摘要： A new differential phase-shift-keyed demodulator is disclosed which can achieve signal demodulation at different wavelengths on ITU grids without requiring active thermal tuning. In accordance with another aspect of the invention, a low-crosstalk demodulator is disclosed which reduces channel leakage by placing neighboring channels at non-optimal interference positions. A demodulator in accordance with the invention may be deployed in a WDM optical system.

摘要翻译： 公开了一种新的差分相移键控解调器，其可以在ITU网格上实现不同波长的信号解调，而不需要主动热调谐。 根据本发明的另一方面，公开了一种低串扰解调器，其通过将相邻信道置于非最佳干扰位置来减少信道泄漏。 根据本发明的解调器可以部署在WDM光学系统中。

公开(公告)号：US08064775B2

公开(公告)日：2011-11-22

申请号：US12183368

申请日：2008-07-31

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

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

IPC分类号： H04B10/04 ,  H04B10/12

CPC分类号： H04B10/5165 ,  H04B10/54 ,  H04B10/548 ,  H04L27/2601

摘要： 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.

摘要翻译： 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：US20070166054A1

公开(公告)日：2007-07-19

申请号：US11621765

申请日：2007-01-10

申请人： Jianjun Yu ,  Lei Xu ,  Philip Ji ,  Ting Wang

发明人： Jianjun Yu ,  Lei Xu ,  Philip Ji ,  Ting Wang

IPC分类号： H04B10/04

CPC分类号： H04B10/508 ,  H04B10/2575 ,  H04B10/505 ,  H04J14/02 ,  H04J14/0256

摘要： 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).

摘要翻译： 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：US08595585B2

公开(公告)日：2013-11-26

申请号：US13116249

申请日：2011-05-26

申请人： Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

发明人： Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

IPC分类号： H03M13/00 ,  G06F11/00

CPC分类号： H03M13/2963 ,  H03M13/1102 ,  H03M13/1117 ,  H03M13/136 ,  H03M13/152 ,  H03M13/6331 ,  H04L1/005 ,  H04L1/0057

摘要： Methods and systems for transmitting and receiving data include reverse concatenated encoding and decoding. Reverse concatenated decoding includes inner decoding the encoded stream with an inner decoder that uses a low-complexity linear-block code to produce an inner-decoder output stream, outer decoding the inner-decoder output stream with an outer decoder that uses a low-density parity-check code to produce an information stream, and iterating extrinsic bit reliabilities from the outer decoding for use in subsequent inner decoding to improve decoding performance.

摘要翻译： 发送和接收数据的方法和系统包括反向级联编码和解码。 反向级联解码包括使用内部解码器对编码流进行内部解码，内部解码器使用低复杂度线性块码来产生内部解码器输出流，使用外部解码器对内部解码器输出流进行外部解码，外部解码器使用低密度 奇偶校验码产生信息流，以及从外部解码中迭代外部位可靠性，用于随后的内部解码以提高解码性能。

公开(公告)号：US08589755B2

公开(公告)日：2013-11-19

申请号：US13114793

申请日：2011-05-24

申请人： Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

发明人： Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

IPC分类号： H03M13/00 ,  G06F11/00

CPC分类号： H03M13/1117 ,  H03M13/6502 ,  H03M13/658 ,  H04L1/0047 ,  H04L1/0054 ,  H04L1/0057 ,  H04L1/0071

摘要： Methods and systems for reduced-complexity decoding of low-density parity-check (LDPC) information. An encoded input stream is received. The received stream is decoded with one or more reduced-complexity min-sum or a posteriori probability LDPC decoders. A v-node update rule in the reduced complexity decoder is omitted.

摘要翻译： 用于低密度奇偶校验（LDPC）信息的降低复杂度解码的方法和系统。 接收编码的输入流。 所接收的流被解码为一个或多个复杂度较低的最小和或后验概率LDPC解码器。 省略了复杂度降低的解码器中的v节点更新规则。

公开(公告)号：US08386879B2

公开(公告)日：2013-02-26

申请号：US12189759

申请日：2008-08-11

申请人： Ivan B Djordjevic ,  Lei Xu ,  Ting Wang ,  Milorad Cvijetic

发明人： Ivan B Djordjevic ,  Lei Xu ,  Ting Wang ,  Milorad Cvijetic

IPC分类号： G06F11/00

CPC分类号： H03M13/1174 ,  H03M13/136

摘要： A method of encoding for optical transmission of information includes encoding information with a generalized low-density parity-check (GLDPC) code for providing coding gains, and constructing the GLDPC code with a Reed-Muller RM code as a component code, the component code being decodable using a maximum posterior probability (MAP) decoding. In a preferred embodiment, the GLDPC code includes a codeword length of substantially 4096, an information word length of substantially 3201, a lower-bound on minimum distance of substantially greater than or equal to 16, a code rate of substantially 0.78 and the RM component code includes an order of substantially 4 and an r parameter of substantially 6.

摘要翻译： 用于信息的光传输的编码方法包括使用用于提供编码增益的广义低密度奇偶校验（GLDPC）码的编码信息，以及用作为分量代码的里德 - 穆勒RM码构建GLDPC码， 使用最大后验概率（MAP）解码来解码。 在优选实施例中，GLDPC代码包括基本上为4096的码字长度，基本为3201的信息字长度，基本上大于或等于16的最小距离的下限，码率基本上为0.78，并且RM分量 代码包括基本为4的顺序和基本为6的r参数。

公开(公告)号：US20120321318A1

公开(公告)日：2012-12-20

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： 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：US20120321311A1

公开(公告)日：2012-12-20

申请号：US13523045

申请日：2012-06-14

申请人： Shaoliang Zhang ,  Fatih Yaman ,  Lei Xu ,  Ting Wang ,  Yoshihisa Inada ,  Takaaki Ogata ,  Yasuhiro Aoki

发明人： Shaoliang Zhang ,  Fatih Yaman ,  Lei Xu ,  Ting Wang ,  Yoshihisa Inada ,  Takaaki Ogata ,  Yasuhiro Aoki

IPC分类号： H04J14/06

CPC分类号： H04B10/616 ,  H04B10/5051 ,  H04B10/532 ,  H04B10/5561 ,  H04J14/06

摘要： An inventive method for coherent interleaved polarization-multiplexing PolMux optical communications with a single IQ modulator includes modulating a light source to generate a 50% return-to-zero RZ signal pulse at a frequency Rs, driving a single IQ modulator with inphase I and quadrature phase Q data at a bit rate of sais Rs to introduce phase modulation on said 50% RZ signal pulse to produce a QPSK pulse signal with all symbols being in a same polarization state without any time overlapping; and polarization modulating said QPSK signal to alternatively convert said QPSK signal into two orthogonal polarizations states enabling an interleaving PolMux signal with a symbol rate of Rs/2.

摘要翻译： 用于具有单个IQ调制器的相干交错偏振复用PolMux光通信的创新方法包括调制光源以产生频率为Rs的50％归零RZ信号脉冲，以同相I和正交驱动单个IQ调制器 相位Q数据以sais的比特率在所述50％RZ信号脉冲上引入相位调制以产生QPSK脉冲信号，所有符号处于相同的极化状态，没有任何时间重叠; 以及对所述QPSK信号进行极化调制，以将所述QPSK信号交替地转换为使得能够以Rs / 2的符号率进行交织的PolMux信号的两个正交极化状态。