Patents by Inventor Lihua NI

Lihua NI 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).

  • Patent number: 11368276
    Abstract: A phase calibration method includes: segmenting a received measurement sequence according to a preset rule; respectively determining a phase calibration factor of each of segmented measurement sequences, wherein the each of the segmented measurement sequences respectively corresponds to a segmented phase; and when performing a phase calibration on a sequence to be verified, according to a matching relation between a phase of the sequence to be verified and the each of the segmented phases, using the phase calibration factor corresponding to a matched segmented phase to perform the phase calibration on the sequence to be verified. The embodiments of the phase calibration method and the device are equivalent to dividing a non-linear measurement sequence into several approximately linear measurement sequences, and then calibrating each of the several approximately linear measurement sequences using a corresponding phase calibration factor respectively.
    Type: Grant
    Filed: January 21, 2019
    Date of Patent: June 21, 2022
    Assignee: DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD
    Inventors: Yong Zhang, Jing Shi, Qinghua Li, Lihua Ni
  • Publication number: 20220094516
    Abstract: A phase calibration method includes: segmenting a received measurement sequence according to a preset rule; respectively determining a phase calibration factor of each of segmented measurement sequences, wherein the each of the segmented measurement sequences respectively corresponds to a segmented phase; and when performing a phase calibration on a sequence to be verified, according to a matching relation between a phase of the sequence to be verified and the each of the segmented phases, using the phase calibration factor corresponding to a matched segmented phase to perform the phase calibration on the sequence to be verified. The embodiments of the phase calibration method and the device are equivalent to dividing a non-linear measurement sequence into several approximately linear measurement sequences, and then calibrating each of the several approximately linear measurement sequences using a corresponding phase calibration factor respectively.
    Type: Application
    Filed: January 21, 2019
    Publication date: March 24, 2022
    Applicant: DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD
    Inventors: Yong ZHANG, Jing SHI, Qinghua LI, Lihua NI
  • Patent number: 10530525
    Abstract: Disclosed are a method and apparatus for demodulating a signal. The method comprises: obtaining a received signal, wherein the received signal comprises a phase noise signal; establishing a likelihood probability ratio integral model on the basis of the received signal and a preset phase noise parameter, wherein the phase noise parameter represents the phase noise signal and is a random variable; performing phase rotation angle extraction and transformation processing and discretization processing on the likelihood probability ratio integral model to obtain a likelihood probability ratio discrete model, wherein the phase rotation angle represents the phase rotation angle obtained on the basis of the phase noise signal; and determining a likelihood probability ratio corresponding to the received signal on the basis of the likelihood probability ratio discrete model to obtain a demodulation result.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: January 7, 2020
    Assignee: DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD
    Inventors: Yuetan Chen, Ling Wang, Lihua Ni
  • Publication number: 20190393982
    Abstract: Disclosed are a method and apparatus for demodulating a signal. The method comprises: obtaining a received signal, wherein the received signal comprises a phase noise signal; establishing a likelihood probability ratio integral model on the basis of the received signal and a preset phase noise parameter, wherein the phase noise parameter represents the phase noise signal and is a random variable; performing phase rotation angle extraction and transformation processing and discretization processing on the likelihood probability ratio integral model to obtain a likelihood probability ratio discrete model, wherein the phase rotation angle represents the phase rotation angle obtained on the basis of the phase noise signal; and determining a likelihood probability ratio corresponding to the received signal on the basis of the likelihood probability ratio discrete model to obtain a demodulation result.
    Type: Application
    Filed: August 31, 2017
    Publication date: December 26, 2019
    Applicant: DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD
    Inventors: Yuetan CHEN, Ling WANG, Lihua NI