SOFT-DECISION NON-BINARY LDPC CODING FOR ULTRA-LONG-HAUL OPTICAL TRANSOCEANIC TRANSMISSIONS
    1.
    发明申请
    SOFT-DECISION NON-BINARY LDPC CODING FOR ULTRA-LONG-HAUL OPTICAL TRANSOCEANIC TRANSMISSIONS 审中-公开
    用于超长距离光电传输的软决策非二进制LDPC编码

    公开(公告)号:US20120216093A1

    公开(公告)日:2012-08-23

    申请号:US13402462

    申请日:2012-02-22

    IPC分类号: H03M13/29 G06F11/10

    摘要: Methods and systems for soft-decision non-binary low-density parity-check (LDPC) coding for ultra-long-haul optical transoceanic transmissions are provided. A receiver includes one or more maximum a posteriori (MAP) equalizers configured to decode one or more symbols of an encoded input stream to provide one or more symbol log-likelihood ratios (LLRs). One or more LLR estimators are configured to estimate the log-likelihood ratios of the one or more symbol LLRs to provide one or more bit LLRs. One or more non-binary LDPC decoders are configured to decode the input stream using the one or more bit LLRs to recover an original input stream.

    摘要翻译: 提供了用于超长距离光学跨洋传输的软判决非二进制低密度奇偶校验(LDPC)编码的方法和系统。 接收机包括一个或多个最大后验(MAP)均衡器,其被配置为解码编码输入流的一个或多个符号以提供一个或多个符号对数似然比(LLR)。 一个或多个LLR估计器被配置为估计一个或多个符号LLR的对数似然比以提供一个或多个比特LLR。 一个或多个非二进制LDPC解码器被配置为使用一个或多个比特LLR解码输入流,以恢复原始输入流。

    Polarization-alternating optical signal generation using CSRZ modulation
    3.
    发明授权
    Polarization-alternating optical signal generation using CSRZ modulation 有权
    使用CSRZ调制的极化交替光信号生成

    公开(公告)号:US08787709B2

    公开(公告)日:2014-07-22

    申请号:US13435775

    申请日:2012-03-30

    IPC分类号: G02F1/035 G02F1/01

    摘要: A method for optical chirp-free optical polarization modulation includes dividing a data modulated optical signal into a first optical path and a second optical path, using a Mach-Zehnder intensity modulator in the first optical path for imparting a π phase difference between adjacent symbols of the data modulated optical signal in the first optical path, adjusting a delay and amplitude of symbols of the data modulated optical signal in the second path so that the symbols in the first path and the symbols in the second path are synchronized and have substantially equal power levels, and combining the first and second optical paths so that symbols from the first and second optical paths are in orthogonal polarizations.

    摘要翻译: 一种用于无啁啾光学偏振调制的方法包括:使用第一光路中的马赫 - 曾德尔强度调制器将数据调制光信号划分成第一光路和第二光路, 在第一光路中的数据调制光信号的相邻符号之间的相位差,调整第二路径中的数据调制光信号的符号的延迟和幅度,使得第一路径中的符号和第二路径中的符号为 同步并且具有基本上相等的功率电平,并且组合第一和第二光路,使得来自第一和第二光路的符号处于正交偏振。

    Coherent Interleaved Polarization-Multiplexing Optical Communications with Single IQ Modulator
    4.
    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

    IPC分类号: 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。

    Polarization-Alternating Optical Signal Generation using CSRZ Modulation
    7.
    发明申请
    Polarization-Alternating Optical Signal Generation using CSRZ Modulation 有权
    使用CSRZ调制的极化交替光信号生成

    公开(公告)号:US20120251028A1

    公开(公告)日:2012-10-04

    申请号:US13435775

    申请日:2012-03-30

    IPC分类号: G02F1/01

    摘要: A method for optical chirp-free optical polarization modulation includes dividing a data modulated optical signal into a first optical path and a second optical path, using a Mach-Zehnder intensity modulator in the first optical path for imparting a π phase difference between adjacent symbols of the data modulated optical signal in the first optical path, adjusting a delay and amplitude of symbols of the data modulated optical signal in the second path so that the symbols in the first path and the symbols in the second path are synchronized and have substantially equal power levels, and combining the first and second optical paths so that symbols from the first and second optical paths are in orthogonal polarizations.

    摘要翻译: 一种用于无啁啾光学偏振调制的方法包括:使用第一光路中的马赫 - 曾德尔强度调制器将数据调制光信号划分成第一光路和第二光路, 在第一光路中的数据调制光信号的相邻符号之间的相位差,调整第二路径中的数据调制光信号的符号的延迟和幅度,使得第一路径中的符号和第二路径中的符号为 同步并且具有基本上相等的功率电平,并且组合第一和第二光路,使得来自第一和第二光路的符号处于正交偏振。

    Reverse concatenated encoding and decoding
    8.
    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

    IPC分类号: H03M13/00 G06F11/00

    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
    9.
    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

    IPC分类号: H03M13/00 G06F11/00

    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。

    GLDPC encoding with Reed-Muller component codes for optical communications
    10.
    发明授权
    GLDPC encoding with Reed-Muller component codes for optical communications 有权
    用于光通信的Reed-Muller组件代码的GLDPC编码

    公开(公告)号:US08386879B2

    公开(公告)日:2013-02-26

    申请号:US12189759

    申请日:2008-08-11

    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。