Patents by Inventor Yongzhao Lao

Yongzhao Lao 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).

  • Resampling technique for arbitrary sampling rate conversion
    Patent number: 11316501
    Abstract: A resampling method based on window function for flexible sampling rate conversion in broadband frequency measurement devices is described. The resampling algorithm can satisfy the requirements of different sampling rates. The frequency responses of the filter in the resampling model based on the Farrow structure are analyzed, and the design criterion of the filter in resampling model is considered. A fractional delay filter design model based on window function method is described. A fractional delay filter matrix, which is expressed by polynomial form, is constructed. Then the expression related to subfilter coefficients is obtained and subfilter coefficients are solved for by the least square method.
    Type: Grant
    Filed: November 5, 2021
    Date of Patent: April 26, 2022
    Assignee: North China Electric Power University
    Inventors: Hao Liu, Tianshu Bi, Jie Lin, Sudi Xu, Yongzhao Lao
  • Resampling algorithm based on window function
    Patent number: 11201604
    Abstract: A resampling method based on window function for flexible sampling rate conversion in broadband frequency measurement devices is described. The resampling algorithm can satisfy the requirements of different sampling rates. The frequency responses of the filter in the resampling model based on the Farrow structure are analyzed, and the design criterion of the filter in resampling model is considered. A fractional delay filter design model based on window function method is described. A fractional delay filter matrix, which is expressed by polynomial form, is constructed. Then the expression related to subfilter coefficients is obtained and subfilter coefficients are solved for by the least square method.
    Type: Grant
    Filed: March 29, 2021
    Date of Patent: December 14, 2021
    Assignee: North China Power Electric University
    Inventors: Hao Liu, Tianshu Bi, Jie Lin, Sudi Xu, Yongzhao Lao