Patents by Inventor Hongbin Zhang

Hongbin Zhang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20140010532
    Abstract: Methods and systems for processing an optical signal in a communication system are disclosed. The disclosed methods yield benefits for estimation and tracking of carrier phase of received signals at a digital coherent receiver. Specifically, phase ambiguity is removed by the insertion of pilot symbols into a transmitted data stream. Pilot symbols are detected from a received signal, and carrier phase is estimated for the detected pilot symbols. If carrier phase track of received data symbols was lost, a correction is applied to recover the track. Coherent symbol decoding may be used which has not been possible with prior art techniques due to the possibility of phase tracking loss.
    Type: Application
    Filed: September 16, 2013
    Publication date: January 9, 2014
    Applicant: TYCO ELECTRONICS SUBSEA COMMUNICATIONS LLC
    Inventors: Hongbin Zhang, Dmitri Foursa
  • Publication number: 20130331390
    Abstract: Nitrogen-containing biphenyl compounds as represented by formula (I), pharmaceutically acceptable salts or derivatives thereof, pharmaceutical compositions, and preparation methods therefore, and anti-HIV-1 use of the compound. Each substituent group in formula (I) is as defined in the description.
    Type: Application
    Filed: October 13, 2011
    Publication date: December 12, 2013
    Applicants: Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming Institute of Zoology, The Chinese Academy of Sciences, Yunnan University
    Inventors: Jingping Liu, Handong Sun, Hongbin Zhang, Yongtong Zheng, Weilie Xiao, Jianxin Pu, Ruirui Wang, Liumeng Yang
  • Patent number: 8588624
    Abstract: Methods and systems for processing an optical signal in a communication system are disclosed. The disclosed methods yield benefits for estimation and tracking of carrier phase of received signals at a digital coherent receiver. Specifically, phase ambiguity is removed by the insertion of pilot symbols into a transmitted data stream. Pilot symbols are detected from a received signal, and carrier phase is estimated for the detected pilot symbols. If carrier phase track of received data symbols was lost, a correction is applied to recover the track. Coherent symbol decoding may be used which has not been possible with prior art techniques due to the possibility of phase tracking loss.
    Type: Grant
    Filed: May 7, 2010
    Date of Patent: November 19, 2013
    Assignee: Tyco Electronics Subsea Communications LLC
    Inventors: Hongbin Zhang, Dmitri Foursa
  • Publication number: 20130216239
    Abstract: A system and method for blind equalization of a QAM signal. Equalization is achieved using an algorithm characterized by cost function that is a function the Euclidian distance, e.g. the minimum Euclidian distance, between points of the constellation associated with the QAM signal, i.e. the distance between symbols.
    Type: Application
    Filed: August 8, 2012
    Publication date: August 22, 2013
    Applicant: TYCO ELECTRONICS SUBSEA COMMUNICATIONS LLC
    Inventors: Hongbin Zhang, Yu Sun, Alexei N. Pilipetskii
  • Publication number: 20130216221
    Abstract: A system and method with a modified bit-interleaved coded modulation with iterative decoding (BICM-ID). Coded and interleaved bits are combined and coded with a second FEC code that is then mapped to a modulation format. The second FEC code may be a single parity check (SPC) and the scheme may be referred to as a SPC-BICM-ID scheme.
    Type: Application
    Filed: August 8, 2012
    Publication date: August 22, 2013
    Applicant: TYCO ELECTRONICS SUBSEA COMMUNICATIONS LLC
    Inventors: Hongbin Zhang, Hussam G. Batshon
  • Publication number: 20130202021
    Abstract: A system and method for polarization de-multiplexing in a coherent optical receiver. De-multiplexing is achieved using a modified constant modulus algorithm (CMA) wherein filter coefficients are determined as a function of a coupling coefficient to avoid convergence of the CMA outputs.
    Type: Application
    Filed: February 3, 2012
    Publication date: August 8, 2013
    Applicant: TYCO ELECTRONICS SUBSEA COMMUNICATIONS LLC
    Inventors: Hongbin Zhang, Oleg Sinkin
  • Patent number: 8483559
    Abstract: A system and method for monitoring an optical communication system. The system may include trunk terminals coupled through a trunk path and a branch terminal coupled the trunk path. A monitoring signal routing device within the branch terminal routes a monitoring signal from a branch-drop path to a branch-add path.
    Type: Grant
    Filed: January 7, 2011
    Date of Patent: July 9, 2013
    Assignee: Tyco Electronics Subsea Communications LLC
    Inventors: Hongbin Zhang, Haifeng Li, Ralph Brian Jander
  • Patent number: 8483574
    Abstract: An optical transmitter utilizing a multi-level data modulator to produce a PDM-QPSK signal, a one-bit delay interferometer configured to correlate the multi-level data modulated signal and an optical filter configured to combine the correlated multi-level data modulated signal with one or more neighboring signals prior to transmitting over one of a plurality of optical channels. The PDM-QPSK correlated signal is configured to reduce the signal spectrum thereby increasing spectral efficiency of the transmitted signal.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: July 9, 2013
    Assignee: Tyco Electronics Subsea Communications, LLC
    Inventors: Hongbin Zhang, Yu Sun, Carl Davidson, Yi Cai
  • Publication number: 20130158198
    Abstract: The invention relates to an epoxy resin composition and preparation thereof. The composition comprises the following blended components: 100 weight parts of epoxy resins; 30 to 120 weight parts of anhydride curing agents; 1 to 45 weight parts of powdery nitrile rubbers; no curing accelerator is included in the composition. The composition of the invention has both higher heat resistance and higher toughness, and is suitable for the fields which require high heat resistance, such as circuit board, electronics packaging, binder and electrical insulating coating etc.
    Type: Application
    Filed: June 3, 2011
    Publication date: June 20, 2013
    Inventors: Guicun Qi, Jinliang Qiao, Xiaohong Zhang, Jianming Gao, Zhihai Song, Binghai Li, Chuanlun Cai, Hongbin Zhang, Ya Wang, Jinmei Lai
  • Patent number: 8437644
    Abstract: In general, optical communication systems and methods may implement a vestigial phase shift keying (PSK) modulation format to enable relatively high transmission rates with closer channel spacing and improved signal detection in a WDM optical communication system. A PSK modulated signal may be correlated with a phase shift, for example, using a delay line interferometer (DLI), to generate a vestigial PSK signal, which may be pre-filtered, combined, and transmitted in the WDM system. The correlation with a phase shift compresses and shifts the signal spectrum such that intersymbol interference (ISI) length may be reduced with minimal increase in the bit error rate (BER) when the vestigial PSK signal is detected.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: May 7, 2013
    Assignee: Tyco Electronics Subsea Communications LLC
    Inventors: Hongbin Zhang, Carl R. Davidson, Jin-Xing Cai, Yi Cai
  • Patent number: 8270847
    Abstract: Polarization multiplexing with different differential phase shift keying (DPSK) schemes generally uses DPSK modulated signals modulated using different DPSK modulation schemes and combined with orthogonal polarizations relative to each other. The different DPSK modulation schemes may use different DPSK phase shifts to represent data, such as a regular DPSK modulation scheme and a ?/2 DPSK modulation scheme. By using different DPSK modulation schemes to represent data on the orthogonally polarized signals, the DPSK demodulators may effectively separate the orthogonally polarized signals using the property of the DPSK receivers. To optimize performance, the DPSK modulated signals may also be bit-interleaved when combined with orthogonal polarization.
    Type: Grant
    Filed: February 2, 2009
    Date of Patent: September 18, 2012
    Assignee: Tyco Electronics Subsea Communications LLC
    Inventors: Hongbin Zhang, Jin-Xing Cai
  • Publication number: 20120213521
    Abstract: In general, optical communication systems and methods may implement a vestigial phase shift keying (PSK) modulation format to enable relatively high transmission rates with closer channel spacing and improved signal detection in a WDM optical communication system. A PSK modulated signal may be correlated with a phase shift, for example, using a delay line interferometer (DLI), to generate a vestigial PSK signal, which may be pre-filtered, combined, and transmitted in the WDM system. The correlation with a phase shift compresses and shifts the signal spectrum such that intersymbol interference (ISI) length may be reduced with minimal increase in the bit error rate (BER) when the vestigial PSK signal is detected.
    Type: Application
    Filed: February 23, 2011
    Publication date: August 23, 2012
    Applicant: TYCO ELECTRONICS SUBSEA COMMUNICATIONS LLC
    Inventors: Hongbin Zhang, Carl R. Davidson, Jin-Xing Cai, Yi Cai
  • Publication number: 20120213522
    Abstract: In general, optical communication systems and methods may generate higher-level nmQAM from nQAM signals using one or more delay line interferometers (DLIs) arranged in various configurations. The nQAM signals may be generated by a lower-level modulator, such as a BPSK modulator, QPSK modulator or lower-level QAM modulator, with binary driving signals. Different parameters of the DLIs, such as free spectral range (FSR), phase shift, and amplitude imbalance, may be selected to accomplish the desired higher-level nmQAM depending upon the nQAM signal.
    Type: Application
    Filed: February 23, 2011
    Publication date: August 23, 2012
    Applicant: TYCO ELECTRONICS SUBSEA COMMUNICATIONS LLC
    Inventors: Hongbin Zhang, Jin-Xing Cai, Yu Sun, Carl R. Davidson, Yi Cai, Georg Heinrich Mohs
  • Publication number: 20120196022
    Abstract: Disclosed herein is a composition (composite thickener) that generally contains about 1 wt % to about 99 wt % (e.g., 1 wt % to 99 wt %) corn fiber gum (CFG) and about 99 wt % to about 1 wt % (e.g., 99 wt % to 1 wt %) polymer thickener. The polymer thickener may be anionic polysaccharides, cationic polysaccharide, neutral polysaccharides, or mixtures thereof. When applied to aqueous solutions, CFG produced synergistic effects with one or more polymer thickener components and showed a superior thickening effect than individual CFG and other polymer thickener components.
    Type: Application
    Filed: January 18, 2012
    Publication date: August 2, 2012
    Inventors: Madhav P. Yadav, Hongbin Zhang, Tu Luan, Lijiao Wu
  • Publication number: 20120177362
    Abstract: A system and method for monitoring an optical communication system. The system may include trunk terminals coupled through a trunk path and a branch terminal coupled the trunk path. A monitoring signal routing device within the branch terminal routes a monitoring signal from a branch-drop path to a branch-add path.
    Type: Application
    Filed: January 7, 2011
    Publication date: July 12, 2012
    Applicant: TYCO ELECTRONICS SUBSEA COMMUNICATIONS LLC
    Inventors: Hongbin Zhang, Haifeng Li, Ralph Brian Jander
  • Publication number: 20120093510
    Abstract: An optical transmitter utilizing a multi-level data modulator to produce a PDM-QPSK signal, a one-bit delay interferometer configured to correlate the multi-level data modulated signal and an optical filter configured to combine the correlated multi-level data modulated signal with one or more neighboring signals prior to transmitting over one of a plurality of optical channels. The PDM-QPSK correlated signal is configured to reduce the signal spectrum thereby increasing spectral efficiency of the transmitted signal.
    Type: Application
    Filed: October 15, 2010
    Publication date: April 19, 2012
    Applicant: TYCO ELECTRONICS SUBSEA COMMUNICATIONS LLC
    Inventors: Hongbin Zhang, Yu Sun, Carl Davidson, Yi Cai
  • Patent number: 8135274
    Abstract: A system and method for fault identification in optical communication networks. One or more repeaters in the system includes a loop back path that couples an output a first amplifier for amplifying signals carried in a first direction through a repeater to an input of a second amplifier for amplifying signals carried in a second direction through said repeater. Fault analysis is conducted using loop gain data associated with test signals transmitted on the first or second paths and returned on the opposite path through the loop back paths.
    Type: Grant
    Filed: February 11, 2008
    Date of Patent: March 13, 2012
    Assignee: Tyco Electronics Subsea Communications LLC
    Inventors: Hongbin Zhang, Lee Richardson
  • Patent number: 8090270
    Abstract: An apparatus, system and method wherein a polarization multiplexed differential phase shift keying format (POLMUX-DPSK) is provided with offset and bit-interleaved frequency channels and demodulated using a DPSK demodulator.
    Type: Grant
    Filed: August 6, 2008
    Date of Patent: January 3, 2012
    Assignee: Tyco Electronics Subsea Communications LLC
    Inventors: Hongbin Zhang, Carl R. Davidson
  • Publication number: 20110274442
    Abstract: Methods and systems for processing an optical signal in a communication system are disclosed. The disclosed methods yield benefits for estimation and tracking of carrier phase of received signals at a digital coherent receiver. Specifically, phase ambiguity is removed by the insertion of pilot symbols into a transmitted data stream. Pilot symbols are detected from a received signal, and carrier phase is estimated for the detected pilot symbols. If carrier phase track of received data symbols was lost, a correction is applied to recover the track. Coherent symbol decoding may be used which has not been possible with prior art techniques due to the possibility of phase tracking loss.
    Type: Application
    Filed: May 7, 2010
    Publication date: November 10, 2011
    Applicant: Tyco Electronics Subsea Communications LLC
    Inventors: Hongbin Zhang, Dmitri Foursa
  • Patent number: 8009983
    Abstract: Various high loss loop back (HLLB) repeater architectures are disclosed that enable selectively monitoring (e.g., measuring, analyzing, etc) of Rayleigh signals from both inbound and outbound directions of an optical communication system. In one such embodiment, first and second optical test signal frequencies (or ranges) are used, in conjunction with selective filtering, for monitoring the outbound and inbound paths, respectively. The repeater architectures allow optical time domain reflectometry (OTDR) monitoring techniques to be employed, for example, in particularly long repeater spans, such as those in excess of 90 km in length.
    Type: Grant
    Filed: June 26, 2008
    Date of Patent: August 30, 2011
    Assignee: Tyco Electronics Subsea Communications LLC
    Inventor: Hongbin Zhang