Patents by Inventor Javad Ashjaee

Javad Ashjaee 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: 9035826
    Abstract: A rover processor determines position of a rover based upon the interaction between multiple antennas located at the rover and multiple antennas located at a base. The rover antennas may include a rover master antenna having a phase center located at the centroid of the antennas patterns of at least two auxiliary rover antennas. The rover processor may determine the position of the rover master antenna based upon the relative positions of at least two rover antennas (e.g., the rover master antenna and at least one rover auxiliary antenna, or at least two rover auxiliary antennas) with respect to at least two antennas of a base transceiver.
    Type: Grant
    Filed: February 8, 2012
    Date of Patent: May 19, 2015
    Assignee: Javad GNSS, Inc.
    Inventors: Javad Ashjaee, Lev B. Rapoport, Dmitry Kinkulkin, Vladimir Yefriemov
  • Publication number: 20150116145
    Abstract: Systems and methods for aggregating interference data and generating visual representations of the interference data are provided. In one example method, interference data may be received from multiple GNSS receivers positioned at various geographical locations. A request for a visual representation of interference at a location may be received. In response to the request, a visual representation of interference at the requested location may be generated based on at least a portion of the received interference data. The visual representation may include a map overlaid with visual indicators of interference indicating a location and magnitude of the interference. The visual representation of interference at the requested location may then be transmitted to a computing device requesting the representation.
    Type: Application
    Filed: October 7, 2014
    Publication date: April 30, 2015
    Inventor: Javad ASHJAEE
  • Publication number: 20150100269
    Abstract: Systems and methods for performing automated localization are provided. In one example method, a plurality of coordinates representing positions of a plurality of locations may be received. The plurality of coordinates may be from two or more different coordinate systems. The numerical values of each of the plurality of coordinates may be evaluated to determine the coordinate system to which the coordinate belongs. The coordinates may be grouped into sets of coordinates based on their determined coordinate systems. Coordinates from one coordinate system may be paired with coordinates that represent the same locations from another coordinate system. A shape matching algorithm may be used to determine coordinates from different systems that represent the same locations. A localization process may then be used to convert the coordinates of the first coordinate system into coordinates of the second coordinate system based on the paired coordinates.
    Type: Application
    Filed: October 2, 2014
    Publication date: April 9, 2015
    Inventor: Javad ASHJAEE
  • Patent number: 8975967
    Abstract: A low-noise amplifier (LNA) filter for use with global navigation satellite system (GNSS) devices is disclosed. A first LNA stage, which is configured to connect to an antenna configured to receive GNSS signals, includes an LNA. A second LNA stage, which is connected to the output of the first LNA stage, has a surface acoustic wave (SAW) filter and an LNA. A third LNA stage, which is connected to the output of the second LNA stage, also has a SAW filter and an LNA.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: March 10, 2015
    Assignee: Javad GNSS, Inc.
    Inventors: Javad Ashjaee, Dmitry Dubrovsky
  • Publication number: 20150054685
    Abstract: Systems and methods for surveying using a GNSS device are provided. In one example method, a GNSS device may be used to determine the location of points along a path and to add those points to a set of points representing the path. When adding each point, the device may determine if the point represents a new point or a previously measured point. If the point is a new point, the device may add the point to the set of points. If the point is a previously measured point, the device may display one or more previously measured points to allow the user to select which previously measured point corresponds to the point currently being measured. The user may select a previously measured point and a point may be added to the set of points using the location of the selected previously measured point.
    Type: Application
    Filed: August 23, 2013
    Publication date: February 26, 2015
    Applicant: JAVAD GNSS, INC.
    Inventor: Javad ASHJAEE
  • Patent number: 8872700
    Abstract: The position of a global navigation satellite system (GNSS) surveying receiver is determined based on a plurality of RTK engines. A first RTK engine is implementing using a first set of parameters. A second RTK engine is implemented using a second set of parameter different than the first set. A plurality of GNSS signals are received from multiple satellites. At least one correction signal is received from at least one base receiver. A first position is determined from the first RTK engine based on the GNSS signals and the at least one correction signal. A second position is determined from the first RTK engine based on the GNSS signals and the at least one correction signal. A final position of the GNSS surveying receiver is determined based on the first position or the second position or a combination of both positions.
    Type: Grant
    Filed: April 2, 2012
    Date of Patent: October 28, 2014
    Assignee: Javad GNSS, Inc.
    Inventors: Javad Ashjaee, Lev B. Rapoport
  • Patent number: 8717233
    Abstract: A method for mitigating the effects of multipath errors in GNSS devices is provided. Signals from GNSS satellites are received. Image data from an image sensor is received. Orientation data from an orientation sensor is received. The orientation data describes the orientation of the image sensor. Obstruction data is determined based on the image data. The obstruction data includes an obstruction region that indicates the sky in that region is obstructed by a structure. Based on the orientation data, obstruction data, and GNSS satellite location data, the position of GNSS satellites with respect to the obstruction region is determined. The location of the GNSS device is determined based on signals from some of the GNSS satellites and the position of GNSS satellites with respect to the obstruction region.
    Type: Grant
    Filed: November 21, 2011
    Date of Patent: May 6, 2014
    Assignee: Javad GNSS, Inc.
    Inventors: Javad Ashjaee, Mikhail Gribkov
  • Patent number: 8717232
    Abstract: A handheld GNSS device includes a housing, handgrips integral to the housing for enabling a user to hold the device, and a display screen integral with the housing. The device has a GNSS antenna and a communication antenna, both integral with the housing. The GNSS antenna receives position data from GNSS satellites. The communication antenna receives positioning assistance data from a base station. The GNSS antenna has a first antenna pattern, and the communication antenna has a second antenna pattern. The first and second antenna patterns are substantially separated. Coupled to the GNSS antenna, within the housing, is at least one receiver. Further, the device includes, within the housing, orientation circuitry for generating orientation data, imaging circuitry for obtaining image data, and positioning circuitry for determining a position for the point of interest based on the position data, the positioning assistance data, the orientation data, and the image data.
    Type: Grant
    Filed: January 18, 2012
    Date of Patent: May 6, 2014
    Assignee: Javad GNSS, Inc.
    Inventors: Javad Ashjaee, Lev B. Rapoport, Mikhail Gribkov, Alexander I. Gribkov
  • Publication number: 20140081570
    Abstract: A graphics-aided geodesic device is provided. The device includes an antenna for receiving position data from a plurality of satellites and a receiver coupled to the antenna. The device further includes orientation circuitry for obtaining orientation data. The orientation data represents an orientation of the apparatus with respect to a plane parallel with a horizon. The device further includes positioning circuitry for determining the position of the point of interest based at least on the position data and the orientation data.
    Type: Application
    Filed: November 22, 2013
    Publication date: March 20, 2014
    Applicant: JAVAD GNSS, INC.
    Inventors: Javad ASHJAEE, Mikhail GRIBKOV, Lev B. RAPOPORT
  • Publication number: 20140077865
    Abstract: Low-noise amplifier (LNA) filters and processes for filtering global navigation satellite system (GNSS) signals are disclosed. The LNA filters can be used to down-convert a received GNSS signal to a lower frequency, filter the GNSS signal at the lower frequency, and up-convert the GNSS signal to the original frequency of the GNSS signal. The down-converted frequency can be selected based on a temperature of the GNSS signal to compensate for shifts in the frequency response of the filter due to temperature changes.
    Type: Application
    Filed: September 19, 2013
    Publication date: March 20, 2014
    Applicant: JAVAD GNSS, INC.
    Inventors: Javad ASHJAEE, Dmitry DUBROVSKY
  • Publication number: 20140062778
    Abstract: Systems and methods for detecting and displaying cycle slips are provided. In one example method, a first L1 signal and a second L2 signal may be received. The coarse/acquisition code from the L1 signal may be extracted and may be monitored to detect a phase shift in the code. In response to detecting a phase shift in the code, a data bit of the L1 signal may be monitored for a predetermined length of time to detect a change in the data bit. A cycle slip may be detected in response to detecting a change in the data bit during the predetermined length of time. In another example, a cycle slip may be detected in response to detecting a change between a phase of the L1 signal and a phase of the L2 signal.
    Type: Application
    Filed: August 28, 2013
    Publication date: March 6, 2014
    Applicant: JAVAD GNSS, INC.
    Inventors: Javad ASHJAEE, Sergey YUDANOV
  • Publication number: 20130016006
    Abstract: An apparatus for determining signal strength data within allocated GNSS frequency band(s) is provided. The apparatus includes a GNSS antenna. The GNSS antenna receives signals within the allocated GNSS frequency band. The apparatus further includes receiving circuitry. The receiving circuitry is for demodulating the received signals. The apparatus further includes a processor and memory for storing instructions, executable by the processor. The instructions include instructions for generating signal strength data for the received signals within the GNSS allocated frequency based on the demodulated signals, and for determining a position for a point of interest based upon the demodulated signals. Included in the apparatus is a display screen for displaying a graphical representation of the signal strength data of at least a portion of the at least one GNSS allocated frequency band.
    Type: Application
    Filed: September 20, 2012
    Publication date: January 17, 2013
    Inventors: Javad ASHJAEE, Sergey YUDANOV
  • Publication number: 20120299936
    Abstract: A graphics-aided geodesic device is provided. The device includes an antenna for receiving position data from a plurality of satellites and a receiver coupled to the antenna. The device further includes orientation circuitry for obtaining orientation data. The orientation data represents an orientation of the apparatus with respect to a plane parallel with a horizon. The device further includes positioning circuitry for determining the position of the point of interest based at least on the position data and the orientation data.
    Type: Application
    Filed: November 21, 2011
    Publication date: November 29, 2012
    Applicant: JAVAD GNSS, Inc.
    Inventors: Javad Ashjaee, Mikhail Gribkov, Lev B. Rapoport
  • Publication number: 20120293365
    Abstract: A method for mitigating the effects of multipath errors in GNSS devices is provided. Signals from GNSS satellites are received. Image data from an image sensor is received. Orientation data from an orientation sensor is received. The orientation data describes the orientation of the image sensor. Obstruction data is determined based on the image data. The obstruction data includes an obstruction region that indicates the sky in that region is obstructed by a structure. Based on the orientation data, obstruction data, and GNSS satellite location data, the position of GNSS satellites with respect to the obstruction region is determined. The location of the GNSS device is determined based on signals from some of the GNSS satellites and the position of GNSS satellites with respect to the obstruction region.
    Type: Application
    Filed: November 21, 2011
    Publication date: November 22, 2012
    Applicant: JAVAD GNSS, Inc.
    Inventors: Javad Ashjaee, Mikhail Gribkov
  • Publication number: 20120256788
    Abstract: The position of a global navigation satellite system (GNSS) surveying receiver is determined based on a plurality of RTK engines. A first RTK engine is implementing using a first set of parameters. A second RTK engine is implemented using a second set of parameter different than the first set. A plurality of GNSS signals are received from multiple satellites. At least one correction signal is received from at least one base receiver. A first position is determined from the first RTK engine based on the GNSS signals and the at least one correction signal. A second position is determined from the first RTK engine based on the GNSS signals and the at least one correction signal. A final position of the GNSS surveying receiver is determined based on the first position or the second position or a combination of both positions.
    Type: Application
    Filed: April 2, 2012
    Publication date: October 11, 2012
    Applicant: JAVAD GNSS, INC.
    Inventors: Javad ASHJAEE, Lev B. RAPOPORT
  • Publication number: 20120242542
    Abstract: Dynamic inter-channel bias calibration of a navigational receiver is provided. A reference signal is propagated through front-end circuitry of the receiver. A delay caused by the propagation of the reference signal through the front-end circuitry is measured. The inter-channel bias of the navigational receiver is reduced using the measured delay associated with the front-end circuitry of the receiver.
    Type: Application
    Filed: September 20, 2011
    Publication date: September 27, 2012
    Applicant: JAVAD GNSS, Inc.
    Inventors: Sergey YUDANOV, Vyacheslav VARYUKHIN, Nikolay SHURYGIN, Javad ASHJAEE
  • Publication number: 20120229333
    Abstract: An apparatus for determining signal strength data within at least one allocated GNSS frequency band is provided. The apparatus includes a GNSS antenna. The GNSS antenna receives signals within the allocated GNSS frequency band. The apparatus further includes receiving circuitry. The receiving circuitry is for demodulating the received signals. The apparatus further includes a processor and memory for storing instructions, executable by the processor. The instructions include instructions for generating signal strength data for the received signals within the GNSS allocated frequency based on the demodulated signals, and for determining a position for a point of interest based upon the demodulated signals. Included in the apparatus is a display screen for displaying a graphical representation of the signal strength data of at least a portion of the at least one GNSS allocated frequency band.
    Type: Application
    Filed: September 8, 2011
    Publication date: September 13, 2012
    Applicant: JAVAD GNSS, INC.
    Inventors: Javad Ashjaee, Sergey Yudanov
  • Publication number: 20120188122
    Abstract: A handheld GNSS device includes a housing, handgrips integral to the housing for enabling a user to hold the device, and a display screen integral with the housing. The device has a GNSS antenna and a communication antenna, both integral with the housing. The GNSS antenna receives position data from GNSS satellites. The communication antenna receives positioning assistance data from a base station. The GNSS antenna has a first antenna pattern, and the communication antenna has a second antenna pattern. The first and second antenna patterns are substantially separated. Coupled to the GNSS antenna, within the housing, is at least one receiver. Further, the device includes, within the housing, orientation circuitry for generating orientation data, imaging circuitry for obtaining image data, and positioning circuitry for determining a position for the point of interest based on the position data, the positioning assistance data, the orientation data, and the image data.
    Type: Application
    Filed: January 18, 2012
    Publication date: July 26, 2012
    Applicant: JAVAD GNSS, Inc.
    Inventors: Javad Ashjaee, Lev B. Rapoport, Mikhail Gribkov, Alexander Gribkov
  • Publication number: 20120139784
    Abstract: A rover processor determines position of a rover based upon the interaction between multiple antennas located at the rover and multiple antennas located at a base. The rover antennas may include a rover master antenna having a phase center located at the centroid of the antennas patterns of at least two auxiliary rover antennas. The rover processor may determine the position of the rover master antenna based upon the relative positions of at least two rover antennas (e.g., the rover master antenna and at least one rover auxiliary antenna, or at least two rover auxiliary antennas) with respect to at least two antennas of a base transceiver.
    Type: Application
    Filed: February 8, 2012
    Publication date: June 7, 2012
    Applicant: JAVAD GNSS, Inc.
    Inventors: Javad Ashjaee, Lev B. Rapoport, Dmitry Kinkulkin, Vladimir Yefriemov
  • Publication number: 20120050099
    Abstract: A handheld GNSS device for determining position data for a point of interest is provided. The device includes a housing, handgrips integral to the housing for enabling a user to hold the device, and a display screen integral with the housing for displaying image data and orientation data to assist a user in positioning the device. The device further includes a GNSS antenna and at least one communication antenna, both integral with the housing. The GNSS antenna receives position data from a plurality of satellites. One or more communication antennas receive positioning assistance data related to the position data from a base station. The GNSS antenna has a first antenna pattern, and the at least one communication antenna has a second antenna pattern. The GNSS antenna and the communication antenna(s) are configured such that the first and second antenna patterns are substantially separated. Coupled to the GNSS antenna, within the housing, is at least one receiver.
    Type: Application
    Filed: August 30, 2010
    Publication date: March 1, 2012
    Applicant: JAVAD GNSS, INC.
    Inventors: Javad ASHJAEE, Lev B. Rapoport, Mikhail Gribkov, Alexander Gribkov