Patents by Inventor Yao-Hwa Wen

Yao-Hwa Wen 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: 8884814
    Abstract: A processing method for radar signal with dual pulse repetition frequency, comprising: generating a first transmission signal and a second transmission signal, and perform a transmission process; reflecting a first echo signal and a second echo signal from an object, and converting the first transmission signal and the second transmission signal to a frequency domain information by using 2D (Two Dimension) fast Fourier transform (FFT); and filtering noise in the frequency domain information, and performing a calculation program by using a algorithm to obtain Doppler shift of the object. Thereby, the processing method of the present invention can overcome the bad operation ability of the lower hardware and advance the radar target detection speed restrictions.
    Type: Grant
    Filed: December 6, 2012
    Date of Patent: November 11, 2014
    Assignee: Chung Shan Institute of Science and Technology, Armaments Bureau, M. N.D.
    Inventors: Yao-Hwa Wen, Min-Fang Lo
  • Publication number: 20140159947
    Abstract: A processing method for radar signal with dual pulse repetition frequency, comprising: generating a first transmission signal and a second transmission signal, and perform a transmission process; reflecting a first echo signal and a second echo signal from an object, and converting the first transmission signal and the second transmission signal to a frequency domain information by using 2D (Two Dimension) fast Fourier transform (FFT); and filtering noise in the frequency domain information, and performing a calculation program by using a algorithm to obtain Doppler shift of the object. Thereby, the processing method of the present invention can overcome the bad operation ability of the lower hardware and advance the radar target detection speed restrictions.
    Type: Application
    Filed: December 6, 2012
    Publication date: June 12, 2014
    Inventors: YAO-HWA WEN, MIN-FANG LO
  • Patent number: 7474255
    Abstract: The present invention relates to a target tracking method of radar with frequency modulated continuous wave, which transmits a transmitted signal to receive a return wave of the transmitted signal that is used for detecting the target and obtaining the relative distance between the target and the radar. The target tracking method includes transmitting a frequency modulated continuous wave and receiving the reflected wave; getting a reflected wave corresponding to the target by detecting the reflected wave; getting a range gate error by seeking the plurality of the range gates corresponding to the reflected wave; and getting a position and a speed of the target at next time by knowing the position of the target at present time basis of the range gate error. Hence, the relative distance between the radar and the target is got.
    Type: Grant
    Filed: December 5, 2006
    Date of Patent: January 6, 2009
    Assignee: Chung Shan Institute of Science and Technology, Armaments Bureau, M.N.D.
    Inventors: Hung-Tao Hsieh, Feng-Ling Liu, Yao-Hwa Wen
  • Publication number: 20080129582
    Abstract: The present invention relates to a tracking target method of radar with frequency modulation continuous wave, which transmits a transmitted signal to receive a return wave of the transmitted signal that is used for detecting the target and obtaining the relative distance between the target and the radar. The tracking target method includes transmitting a frequency modulation continuous wave and receiving the reflective wave; getting a reflective wave corresponding to the target by detecting the reflective wave; getting a range gate error by seeking the plurality of the range gates corresponding to the reflective wave; and getting a position and a speed of the target at next time by knowing the position of the target at present time basis of the range gate error. Hence, the relative distance between the radar and the target is got.
    Type: Application
    Filed: December 5, 2006
    Publication date: June 5, 2008
    Inventors: Hung-Tao Hsieh, Feng-Ling Liu, Yao-Hwa Wen
  • Patent number: 7327308
    Abstract: A test device for a frequency modulated continuous wave (FMCW) radar is provided. The test device has a central control unit for monitoring the FMCW radar. When the FMCW radar transmits a frequency modulated continuous signal to search for a target, the central control unit of the test device in present invention will simulate the motion of the target according to a plurality of setting parameters and generate an echo signal to the FMCW radar. The present invention also includes a first digital signal synthesizer and a transmitting unit. The first digital signal synthesizer is coupled to the central control unit for generating and transmitting an intermediate-frequency signal to the transmitting unit according to the settings in the central control unit and a reference clock. The transmitting unit generates the echo signal according to the intermediate-frequency signal.
    Type: Grant
    Filed: April 28, 2005
    Date of Patent: February 5, 2008
    Assignee: Chung Shan Institute of Science and Technology, Armaments Bureau, M.N.D.
    Inventors: Shih-Tung Cheng, Yao-Hwa Wen, Ke-Tand Chien
  • Publication number: 20060244654
    Abstract: A test device for a frequency modulated continuous wave (FMCW) radar is provided. The test device has a central control unit for monitoring the FMCW radar. When the FMCW radar transmits a frequency modulated continuous signal to search for a target, the central control unit of the test device in present invention will simulate the motion of the target according to a plurality of setting parameters and generate an echo signal to the FMCW radar. The present invention also includes a first digital signal synthesizer and a transmitting unit. The first digital signal synthesizer is coupled to the central control unit for generating and transmitting an intermediate-frequency signal to the transmitting unit according to the settings in the central control unit and a reference clock. The transmitting unit generates the echo signal according to the intermediate-frequency signal.
    Type: Application
    Filed: April 28, 2005
    Publication date: November 2, 2006
    Inventors: Shih-Tung Cheng, Yao-Hwa Wen, Ke-Tand Chien