Patents by Inventor Jianqiang Xuan

Jianqiang Xuan 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).

  • Systems and methods for providing improved TCAS bearing measurement
    Patent number: 8965680
    Abstract: Systems and methods for improving bearing accuracy in a Traffic Collision Avoidance System (TCAS) environment. An interrogation signal is transmitted from an array of antenna elements. A response to the transmitted interrogation signal from a target is received at a first pair of elements of the array. The first pair of elements is separated by at most ½? of the response signal. A processor determines coarse bearing of the received response. A second pair of elements of the array of antenna elements receives a response to the interrogation signal. The second pair of elements is separated by approximately N? of the response signal. N is an integer not equal to zero. A first bearing value to the target is determined based on the determined coarse bearing and the received response at the second pair of elements. The array is mounted on an aircraft or on a ground installation.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: February 24, 2015
    Assignee: Honeywell International Inc.
    Inventors: Guoqing Wang, Jianqiang Xuan
  • SYSTEMS AND METHODS FOR PROVIDING IMPROVED TCAS BEARING MEASUREMENT
    Publication number: 20130325314
    Abstract: Systems and methods for improving bearing accuracy in a Traffic Collision Avoidance System (TCAS) environment. An interrogation signal is transmitted from an array of antenna elements. A response to the transmitted interrogation signal from a target is received at a first pair of elements of the array. The first pair of elements is separated by at most ½? of the response signal. A processor determines coarse bearing of the received response. A second pair of elements of the array of antenna elements receives a response to the interrogation signal. The second pair of elements is separated by approximately N? of the response signal. N is an integer not equal to zero. A first bearing value to the target is determined based on the determined coarse bearing and the received response at the second pair of elements. The array is mounted on an aircraft or on a ground installation.
    Type: Application
    Filed: February 25, 2011
    Publication date: December 5, 2013
    Applicant: Honeywell International Inc.
    Inventors: Guoqing Wang, Jianqiang Xuan