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184 条记录 (耗时 0.025 秒)

    Colorless Differential Phase Shift Keyed and Low Crosstalk Demodulators
    11.
    发明申请
    Colorless Differential Phase Shift Keyed and Low Crosstalk Demodulators 审中-公开
    无色差分相移键控和低串扰解调器

    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。

    High speed LDPC decoding
    13.
    发明授权
    High speed LDPC decoding 有权
    高速LDPC解码

    公开(公告)号：US08181091B2

    公开(公告)日：2012-05-15

    申请号：US12571501

    申请日：2009-10-01

    申请人： Ivan Djordjevic ,  Lei Xu ,  Ting Wang

    发明人： Ivan Djordjevic ,  Lei Xu ,  Ting Wang

    IPC分类号： H03M13/00

    CPC分类号： H03M13/116 ,  H03M13/1111 ,  H03M13/6597

    摘要： An optical probability-domain LDPC decoder suitable for implementation at 100 Gb/s and above provides large coding gains when based on large-girth LDPC codes. A basic building block, the probabilities multiplier circuit, used to implement both check node and probability node update circuits can be implemented using Mach-Zehnder delay interferometer.

    摘要翻译： 适用于100Gb / s以上的光概率域LDPC解码器在基于大围尺码LDPC码时提供较大的编码增益。 用于实现校验节点和概率节点更新电路的基本构建块，概率乘法器电路可以使用Mach-Zehnder延迟干涉仪来实现。

    Reverse concatenated encoding and decoding
    14.
    发明授权
    Reverse concatenated encoding and decoding 有权
    反向级联编码和解码

    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。

    Reduced-complexity LDPC decoding
    15.
    发明授权
    Reduced-complexity LDPC decoding 有权
    降低复杂度的LDPC解码

    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。

    CARRIER AND SUBCARRIER HOPPING FOR OPTICAL OFDM SECURITY
    16.
    发明申请
    CARRIER AND SUBCARRIER HOPPING FOR OPTICAL OFDM SECURITY 有权
    携带器和散热器用于光学OFDM安全

    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。

    Coherent Interleaved Polarization-Multiplexing Optical Communications with Single IQ Modulator
    17.
    发明申请
    Coherent Interleaved Polarization-Multiplexing Optical Communications with Single IQ Modulator 审中-公开
    具有单IQ调制器的相干交错极化复用光通信

    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。

    Differential delay receiver using cross-polarization interferometer for PolMux-DPSK system
    19.
    发明授权
    Differential delay receiver using cross-polarization interferometer for PolMux-DPSK system 有权
    差分延迟接收机采用PolMux-DPSK系统的交叉偏振干涉仪

    公开(公告)号：US08090271B2

    公开(公告)日：2012-01-03

    申请号：US12236694

    申请日：2008-09-24

    申请人： Dayou Qian ,  Ting Wang ,  Lei Xu ,  Philip Nan Ji

    发明人： Dayou Qian ,  Ting Wang ,  Lei Xu ,  Philip Nan Ji

    IPC分类号： H04B10/06

    CPC分类号： H04J14/06

    摘要： A differential delay detection system and method includes an optical splitter to split an incoming optical signal between a first path and a second path. The first path includes a cross-polarization interferometer configured to separately generate polarization independent outputs using split paths and to generate cross-polarization interference outputs, and a polarization demultiplexer configured to combine the polarization independent outputs and the cross-polarization interference outputs from the cross-polarization interferometer with updated coefficients received from the second path to remove the cross-polarization mixed signals. The second path includes a training signal receiver configured to compute the updated coefficients and output the updated coefficients to the polarization demultiplexer.

    摘要翻译： 差分延迟检测系统和方法包括：光分路器，用于在第一路径和第二路径之间分离输入光信号。 第一路径包括交叉偏振干涉仪，其被配置为使用分离路径分开产生偏振无关的输出并产生交叉极化干扰输出;以及偏振解复用器，被配置为组合来自交叉偏振干涉输出的偏振无关输出和交叉极化干扰输出， 偏振干涉仪具有从第二路径接收的更新的系数以去除交叉极化混合信号。 第二路径包括被配置为计算更新的系数并将更新的系数输出到偏振解复用器的训练信号接收器。

    High frequency optical millimeter-wave generation and wavelength reuse
    20.
    发明授权
    High frequency optical millimeter-wave generation and wavelength reuse 有权
    高频光学毫米波发生和波长重用

    公开(公告)号：US08064774B2

    公开(公告)日：2011-11-22

    申请号：US12117347

    申请日：2008-05-08

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

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

    IPC分类号： H04B10/00

    CPC分类号： H04B10/25758

    摘要： A method includes generating an optical millimeter wave signal for modulation of a first data signal, and deriving from the generated optical millimeter wave signal a subsequent light source for modulation of a second data signal. More specifically the generating includes modulating a light wave to a multiple of a frequency of an oscillating signal. Alternatively, the generating includes modulating a data signal mixed with an oscillating signal to a multiple of a frequency of the oscillating signal. The deriving includes modulating a frequency component filtered from a data modulation of the generated optical millimeter wave signal.

    摘要翻译： 一种方法包括产生用于调制第一数据信号的光学毫米波信号，以及从所生成的光学毫米波信号中导出用于调制第二数据信号的后续光源。 更具体地，生成包括将光波调制到振荡信号的频率的倍数。 或者，生成包括将与振荡信号混合的数据信号调制为振荡信号的频率的倍数。 导出包括调制从产生的光学毫米波信号的数据调制滤波的频率分量。