Patents by Inventor Shun-Fang Liu

Shun-Fang Liu 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: 11950016
    Abstract: The present invention provides a control method of a receiver. The control method includes the steps of: when the receiver enters a sleep/standby mode, continually detecting an auxiliary signal from an auxiliary channel to generate a detection result; and if the detection result indicates that the auxiliary signal has a preamble or a specific pattern, generating a wake-up control signal to wake up the receiver before successfully receiving the auxiliary signal having a wake-up command.
    Type: Grant
    Filed: April 15, 2020
    Date of Patent: April 2, 2024
    Assignee: MEDIATEK INC.
    Inventors: Chun-Chia Chen, Chih-Hung Pan, Chia-Chi Liu, Shun-Fang Liu, Meng-Kun Li, Chao-An Chen
  • Publication number: 20210329191
    Abstract: The present invention provides a control method of a receiver. The control method includes the steps of: when the receiver enters a sleep/standby mode, continually detecting an auxiliary signal from an auxiliary channel to generate a detection result; and if the detection result indicates that the auxiliary signal has a preamble or a specific pattern, generating a wake-up control signal to wake up the receiver before successfully receiving the auxiliary signal having a wake-up command.
    Type: Application
    Filed: April 15, 2020
    Publication date: October 21, 2021
    Inventors: Chun-Chia Chen, Chih-Hung Pan, Chia-Chi Liu, Shun-Fang Liu, Meng-Kun Li, Chao-An Chen
  • Patent number: 9584245
    Abstract: The present invention relates to a non-coherent neighbor cell search method for primary synchronization signal (PSS) and secondary synchronization signal (SSS). In order to eliminate the channel response of the home cell, the present invention utilizes the similarity of channel responses at adjacent subcarriers, components at the kth subcarrier and the (k+1)th subcarrier of the received signal are respectively multiplied by the conjugation of the corresponding local synchronization signal to respectively obtain the kth product and the (k+1)th product. Afterward, a combination signal is obtained by examining the difference of the kth product and the (k+1)th product. By mathematical simplification and analysis, the main unknown component of the combination signal is the synchronization signal of neighbor cell, also in a compound form. Thus, the neighbor cell ID can be obtained by performing the correlation operation of the combination signal to the compound reference sequence.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: February 28, 2017
    Assignee: NATIONAL CENTRAL UNIVERSITY
    Inventors: Pei-Yun Tsai, Shun-Fang Liu
  • Publication number: 20150280849
    Abstract: The present invention relates to a non-coherent neighbor cell search method for primary synchronization signal (PSS) and secondary synchronization signal (SSS). In order to eliminate the channel response of the home cell, the present invention utilizes the similarity of channel responses at adjacent subcarriers, components at the kth subcarrier and the (k+1)th subcarrier of the received signal are respectively multiplied by the conjugation of the corresponding local synchronization signal to respectively obtain the kth product and the (k+1)th product. Afterward, a combination signal is obtained by examining the difference of the kth product and the (k+1)th product. By mathematical simplification and analysis, the main unknown component of the combination signal is the synchronization signal of neighbor cell, also in a compound form. Thus, the neighbor cell ID can be obtained by performing the correlation operation of the combination signal to the compound reference sequence.
    Type: Application
    Filed: March 26, 2014
    Publication date: October 1, 2015
    Applicant: National Central University
    Inventors: Pei-Yun Tsai, Shun-Fang Liu