Patents by Inventor Samina Chowdhury

Samina Chowdhury 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).

  • Coherent detection with remotely delivered local oscillators
    Patent number: 10651947
    Abstract: An integrated coherent receiver that is configured to receive an optical signal and receive a local oscillator (LO) source from a remote location. The integrated coherent receiver is configured to extract phase and frequency information carried by the optical signal using the LO source from the remote location.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: May 12, 2020
    Assignee: Futurewei Technologies, Inc.
    Inventors: Xiao Andy Shen, An Li, Hongzhen Wei, Samina Chowdhury, Feng Zhang, YuSheng Bai
  • Coherent Detection with Remotely Delivered Local Oscillators
    Publication number: 20190260476
    Abstract: An integrated coherent receiver that is configured to receive an optical signal and receive a local oscillator (LO) source from a remote location. The integrated coherent receiver is configured to extract phase and frequency information carried by the optical signal using the LO source from the remote location.
    Type: Application
    Filed: February 20, 2018
    Publication date: August 22, 2019
    Inventors: Xiao Andy Shen, An Li, Hongzhen Wei, Samina Chowdhury, Feng Zhang, YuSheng Bai
  • Frequency domain optical channel estimation
    Patent number: 9680574
    Abstract: An optical transceiver in an optical communications network, comprising a receiver configured to receive an optical signal comprising an X-polarization component that comprises a first frame and a Y-polarization component that comprises a second frame. The optical transceiver also comprises a processor coupled to the receiver and configured to determine, in a time domain, a phase estimate according to the first frame and the second frame, determine, in a frequency domain, a channel estimate for the optical signal according to a relationship between the first frame, the second frame, and the phase estimate, and determine a compensated optical signal according to the channel estimate. The optical transceiver further comprises a transmitter coupled to the processor and configured to transmit the compensated optical signal to a downstream component in the optical communications network.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: June 13, 2017
    Assignee: Futurewei Technologies, Inc.
    Inventors: Murali Krishnan, Qing Guo, Samina Chowdhury, Fei Zhu, Yu Sheng Bai
  • Frequency Domain Optical Channel Estimation
    Publication number: 20170155448
    Abstract: An optical transceiver in an optical communications network, comprising a receiver configured to receive an optical signal comprising an X-polarization component that comprises a first frame and a Y-polarization component that comprises a second frame. The optical transceiver also comprises a processor coupled to the receiver and configured to determine, in a time domain, a phase estimate according to the first frame and the second frame, determine, in a frequency domain, a channel estimate for the optical signal according to a relationship between the first frame, the second frame, and the phase estimate, and determine a compensated optical signal according to the channel estimate. The optical transceiver further comprises a transmitter coupled to the processor and configured to transmit the compensated optical signal to a downstream component in the optical communications network.
    Type: Application
    Filed: November 30, 2015
    Publication date: June 1, 2017
    Inventors: Murali Krishnan, Qing Guo, Samina Chowdhury, Fei Zhu, Yu Sheng Bai