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公开(公告)号：US20180102791A1
公开(公告)日：2018-04-12
申请号：US15729110
申请日：2017-10-10
发明人： Shaoliang Zhang , Fatih Yaman , Ting Wang , Yoshihisa Inada
CPC分类号： H03M13/116 , H03M13/1171 , H03M13/2792 , H03M13/2906 , H03M13/2957 , H03M13/616 , H04B10/27 , H04B10/516 , H04B10/616 , H04L1/0041 , H04L1/0045 , H04L1/005 , H04L1/0058 , H04L1/0065
摘要： Systems and methods for data transport in optical communications systems, including a transmitter for encoding a received information sequence by constructing an outer and inner quasi cyclic-low-density parity check (QC-LDPC) code. The encoding includes dividing the received information sequence into a plurality of messages of equal length, encoding each of the messages into a codeword to generate a plurality of outer codewords, cascading the plurality of outer codewords to generate a bit sequence, and executing inner encoding to encode each of the plurality of outer codewords into codewords in QC-LDPC inner code. A receiver decodes a received data stream based on the QC-LDPC inner code using two-phase decoding including iteratively performing at least one of inner/outer and outer/inner decoding until a threshold condition is reached.
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公开(公告)号：US09887729B2
公开(公告)日：2018-02-06
申请号：US14934708
申请日：2015-11-06
发明人： Yue-Kai Huang , Shaoliang Zhang
IPC分类号： H04B10/61 , H04B1/7073 , H04J14/02
CPC分类号： H04B1/7073 , H04B10/616 , H04J14/02
摘要： Systems and methods are disclosed for receiving data by radio frequency (RF) mixing to down-convert in-phase and quadrature parts of a photo-detected electrical RF band signal to baseband for data conversion; controlling a mixing phase of a electrical local oscillator (LO) at one or more RF mixing modules; selecting one of the RF sub-bands to be down-converted to baseband after coherent photo-detection; and performing RF sub-band de-multiplexing for ultra-wide band optical digital coherent detection.
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63.发明授权Rhombic-QPSK modulation for improved tolerance to nonlinearity in fiber communication systems 有权菱形QPSK调制，用于改善光纤通信系统中对非线性的容限公开(公告)号：US09385903B2
公开(公告)日：2016-07-05
申请号：US14456427
申请日：2014-08-11
CPC分类号： H04L27/2067 , H04B2201/709709 , H04L25/03343
摘要： This invention proposes an alternative modulation format for channels that present improved performance when such channels co-propagate with existing intensity modulated channels. This modulation format is named Rhombic-QPSK (R-QPSK) and it is designed in such a way that it presents more tolerance to phase noise created by the nonlinear interaction with the legacy channels.
摘要翻译： 本发明提出了一种用于在这种信道与现有的强度调制信道共同传播时呈现改善的性能的信道的替代调制格式。 该调制格式被称为菱形QPSK（R-QPSK），并且它被设计成使得它对由与传统通道的非线性相互作用产生的相位噪声具有更大的容限。
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64.发明授权Optical square QAM signal emulation using all-optical PAM to QAM signal conversion 有权光学平方QAM信号仿真采用全光PAM至QAM信号转换公开(公告)号：US09369211B2
公开(公告)日：2016-06-14
申请号：US14511560
申请日：2014-10-10
发明人： Yue Kai Huang , Shaoliang Zhang , Ezra Ip
CPC分类号： H04B10/541 , H04B10/676 , H04B2210/516
摘要： An optical communication method includes converting an optical pulse amplitude modulation (PAM) signal to a square QAM signal using an optical delay interferometer (DI) to perform all-optical PAM to QAM conversion in the DI; performing optical de-correlation of I and Q tributaries of the QAM signal to avoid frequency dependent attenuation in RF cabling which impacts signal quality; and finding optimal phase control mechanism of the DI by monitoring and equalizing down-converted I and Q electrical signal amplitudes, using coherent detection; and emulating a square quadrature amplitude modulation (QAM) optical signal with duplicated data copies.
摘要翻译： 光通信方法包括使用光学延迟干涉仪（DI）将光脉冲幅度调制（PAM）信号转换为平方QAM信号，以在DI中执行全光PAM至QAM转换; 执行QAM信号的I和Q支路的光学去相关，以避免影响信号质量的RF布线中的频率相关衰减; 并通过监测和均衡下变频的I和Q电信号幅度，使用相干检测找到DI的最佳相位控制机制; 并仿真具有重复数据副本的正方形正交幅度调制（QAM）光信号。
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公开(公告)号：US09337868B2
公开(公告)日：2016-05-10
申请号：US14336074
申请日：2014-07-21
发明人： Shaoliang Zhang , Fatih Yaman , Yoshihisa Inada , Takaaki Ogata , Takanori Inoue
CPC分类号： H03M13/1111 , H03M13/256 , H03M13/2957 , H03M13/4138 , H04L1/005 , H04L1/0057 , H04L1/006 , H04L1/0064 , H04L1/0076
摘要： At a receiver side, to enhance the performance of concatenated LDPC and TCM coding, an iterative decoding between TCM decoder and LDPC decoder enables improvement in the reliability of received LLRs of each symbol after each iteration. A SOVA output of the TCM is used for LDPC decoding, and then the updated LLRs from LDPC decoder are further looped back to the TCM decoder for the next iteration. In such a manner, the decoding performance could be significantly improved after just several iterations.
摘要翻译： 在接收机侧，为了提高级联LDPC和TCM编码的性能，TCM解码器和LDPC解码器之间的迭代解码器能够在每次迭代后提高每个符号的接收LLR的可靠性。 TCM的SOVA输出用于LDPC解码，然后来自LDPC解码器的更新的LLR进一步循环回TCM解码器进行下一次迭代。 以这种方式，在几次迭代之后，解码性能可以显着提高。
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66.发明申请Interleaved Bidirectional Sub-Nyquist Transmission with Overlapping Counter-Propagating Signal Spectral Bands 审中-公开具有重叠反向传播信号谱带的交织双向子奈奎斯特传输公开(公告)号：US20150304036A1
公开(公告)日：2015-10-22
申请号：US14689099
申请日：2015-04-17
发明人： Yue-Kai Huang , Shaoliang Zhang , Fatih Yaman , Ezra Ip
IPC分类号： H04B10/2507 , H04B10/25 , H04J14/02
CPC分类号： H04B10/25073 , H04B10/2543 , H04J14/0265
摘要： A controller for generating higher fiber spectral efficiency without using high-order modulation formats includes operating an interleaved bidirectional transmission IBT with sub-Nyquist optical regime exchange reach for spectral efficiency.
摘要翻译： 用于在不使用高阶调制格式的情况下产生较高光纤频谱效率的控制器包括以子奈奎斯特光学方式的交换范围来操作具有频谱效率的交错双向传输IBT。
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67.发明授权Optical phase conjugation aided long-haul transmission system with enhanced signal-to-noise ratio and nonlinear tolerance 有权光相位共轭辅助长距离传输系统具有增强的信噪比和非线性公差公开(公告)号：US09088365B2
公开(公告)日：2015-07-21
申请号：US14044530
申请日：2013-10-02
发明人： Yue Tian , Yue-Kai Huang , Shaoliang Zhang
IPC分类号： H04B10/00 , H04B10/2507 , H04B10/2543 , H04B10/50 , H04B10/61
CPC分类号： H04B10/2507 , H04B10/2543 , H04B10/50 , H04B10/61
摘要： A long haul transmission system uses a digital signal processor DSP instead of an additional optical phase conjugate copier because the optical phase conjugate copier requires high quality optical carrier regeneration to recover the pump and optical PLL to maintain phase matching between signal and pump. Therefore, the use of DSP to process the signal and idler at receiver end greatly simplifies the system setup, increases the system stability and decreases the system cost.
摘要翻译： 长距离传输系统使用数字信号处理器DSP而不是附加的光学相位共轭复印机，因为光学相位共轭复印机需要高质量的光载波再生以恢复泵浦和光学PLL以维持信号和泵之间的相位匹配。 因此，在接收端使用DSP处理信号和空闲信号大大简化了系统设置，提高了系统稳定性，降低了系统成本。
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68.发明申请Rhombic-QPSK Modulation for Improved Tolerance to Nonlinearity in Fiber Communication Systems 有权用于提高光纤通信系统中非线性公差的Rhombic-QPSK调制公开(公告)号：US20150043680A1
公开(公告)日：2015-02-12
申请号：US14456427
申请日：2014-08-11
IPC分类号： H04L27/20
CPC分类号： H04L27/2067 , H04B2201/709709 , H04L25/03343
摘要： This invention proposes an alternative modulation format for channels that present improved performance when such channels co-propagate with existing intensity modulated channels. This modulation format is named Rhombic-QPSK (R-QPSK) and it is designed in such a way that it presents more tolerance to phase noise created by the nonlinear interaction with the legacy channels.
摘要翻译： 本发明提出了一种用于在这种信道与现有的强度调制信道共同传播时呈现改善的性能的信道的替代调制格式。 该调制格式被称为菱形QPSK（R-QPSK），并且它被设计成使得它对由与传统通道的非线性相互作用产生的相位噪声具有更大的容限。
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69.发明授权Variable bit-rate QPSK transmitter and method employing polarization manipulation 有权可变比特率QPSK发射机和采用极化处理的方法公开(公告)号：US08953939B2
公开(公告)日：2015-02-10
申请号：US13667708
申请日：2012-11-02
发明人： Shaoliang Zhang , Dayou Qian , Junqiang Hu , Lei Xu , Ting Wang
CPC分类号： H04J14/06 , H04B10/5055
摘要： Disclosed are universal QPSK transmitter structures and methods for generating different QPSK signals exhibiting different polarization schemes, namely PolMux, PolMod and PolSw. The bit rate of the generated signals is variable, thereby allowing the transmitter to adjust to varying network traffic conditions. Advantageously, the generated signals may be detected by analog receivers (PolSw-QPSK) and coherent receivers (PolMux-QPSK, PolMod-QPSK, and PolSw-QPSK).
摘要翻译： 公开了用于产生表现出不同偏振方案的不同QPSK信号的通用QPSK发射机结构和方法，即PolMux，PolMod和PolSw。 所产生的信号的比特率是可变的，从而允许发射机适应不同的网络业务状况。 有利地，所产生的信号可以由模拟接收机（PolSw-QPSK）和相干接收机（PolMux-QPSK，PolMod-QPSK和PolSw-QPSK）来检测。
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公开(公告)号：US20140310580A1
公开(公告)日：2014-10-16
申请号：US14249609
申请日：2014-04-10
发明人： Shaoliang Zhang , Fatih Yaman , Yequn Zhang
IPC分类号： H03M13/45
CPC分类号： H03M13/1111 , H03M13/1145 , H03M13/353 , H03M13/3723 , H03M13/3746 , H03M13/3776 , H03M13/3905 , H03M13/3972
摘要： A computer implemented method for a cyclic (forward-backward) decoding for a forward error-correction FEC scheme includes decoding a given k−1th codeword in in a block code of length N in an optical communication system, forwarding M symbols' enhanced log likelihood ratios LLRs produced by decoding the k−1th codeword, decoding the kth codeword together with forwarded M symbols' enhanced LLRS, and feeding backward, to the initial step i) decoding, corresponding overlapped M symbols' enhanced LLRs for decoding of the k−1 th codeword again.
摘要翻译： 用于前向纠错FEC方案的循环（前向 - 反向）解码的计算机实现方法包括在光通信系统中以长度为N的块码解码给定的第k-1个码字，将M个符号的增强对数似然 比较通过解码第k-1个码字产生的LLR，将第k个码字与转发的M个符号的增强的LLRS一起解码，并向后馈送到初始步骤i）解码相应的重叠的M个符号的增强的LLR以解码k-1 th码字。
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