Patents by Inventor Michail Y. Vorobiev

Michail Y. Vorobiev 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: 6674399
    Abstract: GPS and GLONASS Satellites broadcast code signals which are modulated onto respective carrier signals, and which are received by two receivers on Earth. The first receiver is situated at a point with known coordinates. The results of its measurements are transmitted to a user at a second receiver through a connection link, the user wanting to know the position of the second receiver. The measurements of two receivers are related to a common time moment by extrapolating measurement data that has arrived through the connection link with a delay. An extrapolating unit examines the measurements to find and discard measurements with abnormal errors, and generates extrapolated measurement data (e.g., predictions) for the common time based upon the most reliable data. This enables the measurements of code delays and carrier phase shifts in the satellite signals received by two receivers to be processed for the position of the second receiver.
    Type: Grant
    Filed: August 22, 2002
    Date of Patent: January 6, 2004
    Assignee: Topcon GPS LLC
    Inventors: Mark Isaakovich Zhodzishky, Victor Abramovich Veitsel, Michail Y. Vorobiev, Javad Ashjaee
  • Publication number: 20030085839
    Abstract: GPS and GLONASS Satellites broadcast code signals which are modulated onto respective carrier signals, and which are received by two receivers on Earth. The first receiver is situated at a point with known coordinates. The results of its measurements are transmitted to a user at a second receiver through a connection link, the user wanting to know the position of the second receiver. The measurements of two receivers are related to a common time moment by extrapolating measurement data that has arrived through the connection link with a delay. An extrapolating unit examines the measurements to find and discard measurements with abnormal errors, and generates extrapolated measurement data (e.g., predictions) for the common time based upon the most reliable data. This enables the measurements of code delays and carrier phase shifts in the satellite signals received by two receivers to be processed for the position of the second receiver.
    Type: Application
    Filed: August 22, 2002
    Publication date: May 8, 2003
    Inventors: Mark Isaakovich Zhodzishky, Victor Abramovich Veitsel, Michail Y. Vorobiev, Javad Ashjaee
  • Patent number: 6456233
    Abstract: The measurements of two GPS and/or GLONASS receivers are related to a common time moment by extrapolating measurement data that has arrived through a connection link with a delay. This common time moment is defined by the user. Cycle slips in the phase-lock loops (PLLs) of the receivers, which may be caused by blockage of direct signals from the satellites, strong interference signals, and reflections, are deflected and corrected in a multi-loop nonlinear tracking system. The procedure of resolution of phase measurement ambiguities comprises the preliminary estimation of floating ambiguities by a recurrent (e.g., iterative) procedure including the simultaneous processing of code and phase measurements for all satellites for each processing time interval, and the gradual improvement of the result as the information is accumulated. After the resolution of ambiguity, the user coordinates are estimated with centimeter accuracy on the basis of phase measurements on the carrier frequency.
    Type: Grant
    Filed: June 5, 2001
    Date of Patent: September 24, 2002
    Assignee: Topcon GPS LLC
    Inventors: Mark Isaakovich Zhodzishky, Victor Abramovich Veitsel, Michail Y. Vorobiev, Javad Ashjaee
  • Publication number: 20020021241
    Abstract: Satellites of the GPS and GLONASS navigation systems broadcast code signals which are modulated onto respective carrier signals, and which are received by two receivers on Earth. The first receiver is situated at a point with known coordinates. The results of its measurements are transmitted to a user at a second receiver through a connection link, the user being interested in knowing his or her positioning. The second receiver is similar to the first receiver and it receives the signals of the same satellites. By processing data from the measurements of code delays and carrier phase shifts in the satellite signals received by two receivers, the methods and apparatuses of the inventions of the present application determine the location of the user with high precision and make the time indications of receiver clocks more accurate and exact.
    Type: Application
    Filed: June 5, 2001
    Publication date: February 21, 2002
    Inventors: Mark Isaakovich Zhodzishky, Victor Abramovich Veitsel, Michail Y. Vorobiev, Javad Ashjaee
  • Patent number: 6268824
    Abstract: Satellites of the GPS and GLONASS navigation systems broadcast code signals which are modulated onto respective carrier signals, and which are received by two receivers on Earth. The first receiver is situated at a point with known coordinates. The results of its measurements are transmitted to a user at a second receiver through a connection link, the user being interested in knowing his or her positioning. The second receiver is similar to the first receiver and it receives the signals of the same satellites. By processing data from the measurements of code delays and carrier phase shifts in the satellite signals received by two receivers, the methods and apparatuses of the inventions of the present application determine the location of the user with high precision and make the time indications of receiver clocks more accurate and exact.
    Type: Grant
    Filed: September 18, 1999
    Date of Patent: July 31, 2001
    Assignee: Topcon Positioning Systems, Inc.
    Inventors: Mark Isaakovich Zhodzishky, Victor Abramovich Veitsel, Michail Y. Vorobiev, Javad Ashjaee
  • Patent number: 6219376
    Abstract: Method of suppression of narrow-band interferences attending at the receiver input added to the useful broadband signal and noise. There is a disclosed compensator rejecting narrow-band interferences by means of adjustment loops. Two general methods of construction of such loops are considered. The first general method is based on filtration of the in-phase and quadrature components of the error vector—difference of the interference vector and compensating vector. The second method is based on filtration of the amplitude and full phase of the interference signal. Automatic tuning of the compensator to the mean frequency and effective interference band is ensured.
    Type: Grant
    Filed: February 21, 1998
    Date of Patent: April 17, 2001
    Assignee: Topcon Positioning Systems, Inc.
    Inventors: Mark I. Zhodzishsky, Michail Y. Vorobiev, Victor A. Prasolov, Javad Ashjaee