Patents by Inventor Yajun LONG

Yajun LONG 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: 11520006
    Abstract: A method and apparatus for generating a NLFM signal in real time, and a computer storage medium are disclosed, including: determining a signal parameter of a signal according to a system parameter, the signal parameter includes: a signal bandwidth, a signal pulse width and a PSLR; determining a power spectrum density function according to PSLR; calculating the power spectrum density function to obtain a group delay vector; calculating a frequency axial vector according to a system sampling rate; calculating a time axial vector according to the signal pulse width; performing linear interpolation calculation on the group delay vector to obtain an instantaneous frequency vector; integrating the instantaneous frequency vector to obtain a phase vector; determining a signal time domain discrete vector; and generating a digital signal according to the signal time domain discrete vector, and performing digital-to-analog conversion on the digital signal to obtain the NLFM signal.
    Type: Grant
    Filed: March 16, 2020
    Date of Patent: December 6, 2022
    Assignee: Institute of Electronics Chinese Academy of Sciences
    Inventors: Yu Wang, Kaiyu Liu, Wei Wang, Guodong Jin, Yu Sha, Yunkai Deng, Dacheng Liu, Yajun Long, Yongwei Zhang
  • Patent number: 10948579
    Abstract: Provided are a method and device for designing and optimizing a multi-degree-of-freedom frequency-modulation (FM) signal, and a computer storage medium. The method includes that: a time domain function of the multi-degree-of-freedom FM signal is determined; the constraint condition and the objective function of multi-degree-of-freedom FM signal optimization are established; an algorithm model of augmented Lagrangian genetic algorithm is determined based on the constraint condition and the objective function; characteristic parameters of the first iteration of the algorithm model are initialized, where the characteristic parameters of the first iteration at least include the Lagrange multiplier of the first iteration and the offset of the first iteration; initialization signal of the multi-degree-of-freedom FM signal is acquired, and initialization frequency control points of the initialization signal are determined based on the initialization signal.
    Type: Grant
    Filed: November 19, 2018
    Date of Patent: March 16, 2021
    Assignee: Institute of Electronics, Chinese Academy of Sciences
    Inventors: Yu Wang, Guodong Jin, Yunkai Deng, Yajun Long, Wei Wang
  • Publication number: 20210003666
    Abstract: A method and apparatus for generating a NLFM signal in real time, and a computer storage medium are disclosed, including: determining a signal parameter of a signal according to a system parameter, the signal parameter includes: a signal bandwidth, a signal pulse width and a PSLR; determining a power spectrum density function according to PSLR; calculating the power spectrum density function to obtain a group delay vector; calculating a frequency axial vector according to a system sampling rate; calculating a time axial vector according to the signal pulse width; performing linear interpolation calculation on the group delay vector to obtain an instantaneous frequency vector; integrating the instantaneous frequency vector to obtain a phase vector; determining a signal time domain discrete vector; and generating a digital signal according to the signal time domain discrete vector, and performing digital-to-analog conversion on the digital signal to obtain the NLFM signal.
    Type: Application
    Filed: March 16, 2020
    Publication date: January 7, 2021
    Inventors: Yu WANG, Kaiyu LIU, Wei WANG, Guodong JIN, Yu SHA, Yunkai DENG, Dacheng LIU, Yajun LONG, Yongwei ZHANG
  • Publication number: 20190293774
    Abstract: Provided are a method and device for designing and optimizing a multi-degree-of-freedom frequency-modulation (FM) signal, and a computer storage medium. The method includes that: a time domain function of the multi-degree-of-freedom FM signal is determined; the constraint condition and the objective function of multi-degree-of-freedom FM signal optimization are established; an algorithm model of augmented Lagrangian genetic algorithm is determined based on the constraint condition and the objective function; characteristic parameters of the first iteration of the algorithm model are initialized, where the characteristic parameters of the first iteration at least include the Lagrange multiplier of the first iteration and the offset of the first iteration; initialization signal of the multi-degree-of-freedom FM signal is acquired, and initialization frequency control points of the initialization signal are determined based on the initialization signal.
    Type: Application
    Filed: November 19, 2018
    Publication date: September 26, 2019
    Inventors: Guodong JIN, Yunkai DENG, Yu WANG, Yajun LONG, Wei WANG