Patents by Inventor Chang Il AHN

Chang Il AHN 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: 12261722
    Abstract: A method of processing a signal in a compressive sensing receiver, includes: obtaining a first signal received via an antenna; generating a first baseband signal by mixing the first signal with a second signal generated by a local oscillator based on a pseudo random binary sequence (PRBS); removing a spurious from the first baseband signal based on a pre-stored estimation value obtained by estimating the spurious generated by the local oscillator in advance; and detecting a spectral slice including the first signal based on the first baseband signal from which the spurious is removed and a measurement matrix.
    Type: Grant
    Filed: December 28, 2022
    Date of Patent: March 25, 2025
    Assignee: AGENCY FOR DEFENCE DEVELOPMENT
    Inventors: Jun Il Ahn, Sung Jin Jo, Chang Hun Lee, Sun Phil Nah
  • Patent number: 10066169
    Abstract: The present invention relates to a mesoporous cobalt-metal oxide catalyst for the Fischer-Tropsch synthesis and a method of preparing the same. The mesoporous cobalt-metal oxide catalyst for the Fischer-Tropsch synthesis of the present invention can very stably maintain the mesoporous structure even under a H2-rich high-temperature reduction condition and under a reaction condition of the low-temperature Fischer-Tropsch synthesis, easily transport reactants to the active site of the catalyst due to structural stability, and facilitate the release of heavier hydrocarbon products after production thereof. Additionally, unlike the conventional cobalt-based catalysts which are prepared by adding various co-catalysts for the purpose of improving reducibility, activity, selectivity and increasing thermal stability, etc.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: September 4, 2018
    Assignee: Research & Business Foundation Sungkyunkwan University
    Inventors: Jong Wook Bae, Chang Il Ahn
  • Publication number: 20170014808
    Abstract: The present invention relates to a mesoporous cobalt-metal oxide catalyst for the Fischer-Tropsch synthesis and a method of preparing the same. The mesoporous cobalt-metal oxide catalyst for the Fischer-Tropsch synthesis of the present invention can very stably maintain the mesoporous structure even under a H2-rich high-temperature reduction condition and under a reaction condition of the low-temperature Fischer-Tropsch synthesis, easily transport reactants to the active site of the catalyst due to structural stability, and facilitate the release of heavier hydrocarbon products after production thereof. Additionally, unlike the conventional cobalt-based catalysts which are prepared by adding various co-catalysts for the purpose of improving reducibility, activity, selectivity and increasing thermal stability, etc.
    Type: Application
    Filed: July 14, 2016
    Publication date: January 19, 2017
    Applicant: Research & Business Foundation Sungkyunkwan Univer sity
    Inventors: Jong Wook BAE, Chang Il AHN