Patents by Inventor Ji-Shang Yu

Ji-Shang Yu 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: 9635619
    Abstract: A wireless network device includes an antenna array and a lobe interleaver. The antenna array includes a plurality of antenna elements with different squint angles. The lobe interleaver is coupled to the antenna elements and has a plurality of output lobe ports. The lobe interleaver divides and interleaves the radio signal of the antenna array with the same phase and the same power to generate a plurality of lobes with different squint angles. The number of lobes is twice the number of antenna elements.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: April 25, 2017
    Assignee: ACCTON TECHNOLOGY CORPORATION
    Inventors: I-Ru Liu, Ji-Shang Yu, Chao-Pin Liu, Wen-Pin Lo, Hsin-Hsiung Kang, Hua-Chung Kung
  • Patent number: 9584207
    Abstract: An embodiment of a method for adaptive multi-antenna selection, executed by an AP (access point), which contains at least the following steps. After a data transmission request or a data receipt request is received from a client station, it is determined whether the client station is the first time connected client station within a predetermined time interval. If the client station is the first time connected client station, a first antenna combination is selected to transmit/receive data with the client station using a first antenna selection procedure. If the client station is not the first time connected client station, a second antenna combination is selected to transmit/receive data with the client station using a second antenna selection procedure.
    Type: Grant
    Filed: April 1, 2015
    Date of Patent: February 28, 2017
    Assignee: Accton Technology Corporation
    Inventors: I-Ru Liu, Ji-Shang Yu
  • Publication number: 20150365955
    Abstract: A wireless network device includes an antenna array and a lobe interleaver. The antenna array includes a plurality of antenna elements with different squint angles. The lobe interleaver is coupled to the antenna elements and has a plurality of output lobe ports. The lobe interleaver divides and interleaves the radio signal of the antenna array with the same phase and the same power to generate a plurality of lobes with different squint angles. The number of lobes is twice the number of antenna elements.
    Type: Application
    Filed: June 15, 2015
    Publication date: December 17, 2015
    Applicant: Accton Technology Corporation
    Inventors: I-Ru LIU, Ji-Shang YU, Chao-Pin LIU, Wen-Pin LO, Hsin-Hsiung KANG, Hua-Chung KUNG
  • Publication number: 20150289247
    Abstract: An embodiment of a method for adaptive multi-antenna selection, executed by an AP (access point), which contains at least the following steps. After a data transmission request or a data receipt request is received from a client station, it is determined whether the client station is the first time connected client station within a predetermined time interval. If the client station is the first time connected client station, a first antenna combination is selected to transmit/receive data with the client station using a first antenna selection procedure. If the client station is not the first time connected client station, a second antenna combination is selected to transmit/receive data with the client station using a second antenna selection procedure.
    Type: Application
    Filed: April 1, 2015
    Publication date: October 8, 2015
    Applicant: ACCTON TECHNOLOGY CORPORATION
    Inventors: I-Ru LIU, Ji-Shang YU
  • Patent number: 5448594
    Abstract: A one-bit differential detector for a GMSK signal operates independently of an offset frequency. In particular, a decision signal used by a decision circuit to distinguish between logic "0" and logic "1" is always equal to sin[.DELTA..phi.(T)]. The inventive detector has an improved bit error rate performance in comparison to the prior art.
    Type: Grant
    Filed: January 21, 1993
    Date of Patent: September 5, 1995
    Assignee: Industrial Technology Research Institute
    Inventors: Yung-Liang Huang, Chung H. Lu, Ji-Shang Yu, June-Dan Shih
  • Patent number: 5404379
    Abstract: An apparatus and method for receiving a continuous time pulse amplitude-modulated passband signal is disclosed. The pulse amplitude modulated signal is periodically sampled by a local clock to generate received samples. A convolution of the received samples and an impulse response function is evaluated at a particular value of a phase difference variable to derive corrected samples. Using a narrow transmission band filter, a periodic signal is derived from the corrected samples. The periodic signal has a period equal to a symbol period of the pulse-amplitude modulated signal. Successive samples in each period of the periodic signal are compared to determine if the corrected samples lag or are ahead of optimal samples. If the corrected samples lag or are ahead of the optimal samples, the phase difference variable used to evaluate the convolution is varied by a fixed discrete stepsize.
    Type: Grant
    Filed: June 5, 1992
    Date of Patent: April 4, 1995
    Assignee: Industrial Technology Research Institute
    Inventors: Sammy Shyue, Ching-Hsiang Lin, Ji-Shang Yu, Yen-Chun Lin