Patents by Inventor Subramanian S. Meiyappan

Subramanian S. Meiyappan 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).

  • Publication number: 20190141635
    Abstract: Reducing power consumption of a receiver in association with estimating the receiver's position using ranging signals. Systems and methods may determine power reduction strategy information, identify a power reduction strategy using the determined power reduction strategy information, and place one or more modules of the receiver into a reduced power state using the identified power reduction strategy. The power reduction strategy may result in powering off different circuitry of the receiver at different times, and under different circumstances.
    Type: Application
    Filed: December 14, 2018
    Publication date: May 9, 2019
    Applicant: NextNav, LLC
    Inventors: ARUN RAGHUPATHY, SUBRAMANIAN S. MEIYAPPAN
  • Patent number: 10231201
    Abstract: Synchronizing the local time of beacons. Systems and methods discipline a high-stability local clock of a designated beacon within a geographic region to a network time, and synchronize a local clock of another beacon within the geographic region to the network time.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: March 12, 2019
    Assignee: NextNav, LLC
    Inventors: Subramanian S. Meiyappan, Wouter Pelgrum, Arun Raghupathy
  • Patent number: 10194395
    Abstract: Reducing power consumption of a receiver in association with estimating the receiver's position using ranging signals. Systems and methods may determine power reduction strategy information, identify a power reduction strategy using the determined power reduction strategy information, and place one or more modules of the receiver into a reduced power state using the identified power reduction strategy. The power reduction strategy may result in powering off different circuitry of the receiver at different times, and under different circumstances.
    Type: Grant
    Filed: April 13, 2017
    Date of Patent: January 29, 2019
    Assignee: NextNav, LLC
    Inventors: Arun Raghupathy, Subramanian S. Meiyappan
  • Patent number: 10175945
    Abstract: Systems and methods for improving correlation. In at least one system and method, a signal is received and divided into a plurality of slices. Each of the slices is divided into a plurality of sub-slices. A plurality of chips of a PN code are generated, and sub-slice correlation results are generated in parallel. Summation of the sub-slice correlation results generates a slice correlation results, and the accumulated slice correlation results provide a correlation result.
    Type: Grant
    Filed: April 19, 2017
    Date of Patent: January 8, 2019
    Assignee: NextNav, LLC
    Inventors: Vikram V. Kalkunte, Subramanian S. Meiyappan
  • Publication number: 20180227868
    Abstract: Synchronizing the local time of beacons using two way time transfer methods and hardware enabling such methods. Certain systems incorporate receive hardware into beacon circuitry used for transmitting signals so that the beacon can transmit RF signals during transmission periods, and can also receive RF signals from other beacons during non-transmission periods. Receive hardware may be incorporated into beacon circuitry such that the beacon receives an incoming signal and passes that incoming signal to a digital pre-distortion linearization module, which can process that received signal.
    Type: Application
    Filed: March 30, 2018
    Publication date: August 9, 2018
    Inventors: Arun Raghupathy, Subramanian S. Meiyappan
  • Patent number: 9967845
    Abstract: Synchronizing the local time of beacons using two way time transfer methods and hardware enabling such methods. Certain systems incorporate receive hardware into beacon circuitry used for transmitting signals so that the beacon can transmit RF signals during transmission periods, and can also receive RF signals from other beacons during non-transmission periods. Receive hardware may be incorporated into beacon circuitry such that the beacon receives an incoming signal and passes that incoming signal to a digital pre-distortion linearization module, which can process that received signal. Methods for controlling whether a beacon transmits RF signals or receives RF signals are also discussed, as are methods for using RF signals received from other beacons for synchronization.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: May 8, 2018
    Assignee: NextNav, LLC
    Inventors: Arun Raghupathy, Subramanian S. Meiyappan
  • Publication number: 20180095176
    Abstract: Positioning systems and methods for estimating an altitude of a receiver. In some embodiments, pressure and temperature information from a network of sensors is received by the receiver, and the pressure and temperature information from the network of sensors is used along with pressure information measured at a position of the receiver to estimate the altitude of the receiver.
    Type: Application
    Filed: September 15, 2017
    Publication date: April 5, 2018
    Inventors: ARUN RAGHUPATHY, SUBRAMANIAN S MEIYAPPAN, THOMAS WOLF
  • Publication number: 20170366219
    Abstract: Systems and methods for improving correlation. In at least one system and method, a signal is received and divided into a plurality of slices. Each of the slices is divided into a plurality of sub-slices. A plurality of chips of a PN code are generated, and sub-slice correlation results are generated in parallel. Summation of the sub-slice correlation results generates a slice correlation results, and the accumulated slice correlation results provide a correlation result.
    Type: Application
    Filed: April 19, 2017
    Publication date: December 21, 2017
    Inventors: VIKRAM V. KALKUNTE, SUBRAMANIAN S. MEIYAPPAN
  • Publication number: 20170338855
    Abstract: Systems and methods are described for determining position of a receiver. The positioning system comprises a transmitter network including transmitters that broadcast positioning signals. The positioning system comprises a remote receiver that acquires and tracks the positioning signals and/or satellite signals. The satellite signals are signals of a satellite-based positioning system. A first mode of the remote receiver uses terminal-based positioning in which the remote receiver computes a position using the positioning signals and/or the satellite signals. The positioning system comprises a server coupled to the remote receiver. A second operating mode of the remote receiver comprises network-based positioning in which the server computes a position of the remote receiver from the positioning signals and/or satellite signals, where the remote receiver receives and transfers to the server the positioning signals and/or satellite signals.
    Type: Application
    Filed: July 27, 2017
    Publication date: November 23, 2017
    Inventors: ARUN RAGHUPATHY, GANESH PATTABIRAMAN, SUBRAMANIAN S. MEIYAPPAN
  • Patent number: 9810788
    Abstract: Positioning systems and methods for estimating an altitude of a receiver. In some embodiments, pressure and temperature information from a network of sensors is received by the receiver, and the pressure and temperature information from the network of sensors is used along with pressure information measured at a position of the receiver to estimate the altitude of the receiver.
    Type: Grant
    Filed: April 26, 2015
    Date of Patent: November 7, 2017
    Assignee: NextNav, LLC
    Inventors: Arun Raghupathy, Subramanian S. Meiyappan, Thomas Wolf
  • Publication number: 20170311264
    Abstract: Reducing power consumption of a receiver in association with estimating the receiver's position using ranging signals. Systems and methods may determine power reduction strategy information, identify a power reduction strategy using the determined power reduction strategy information, and place one or more modules of the receiver into a reduced power state using the identified power reduction strategy. The power reduction strategy may result in powering off different circuitry of the receiver at different times, and under different circumstances.
    Type: Application
    Filed: April 13, 2017
    Publication date: October 26, 2017
    Inventors: ARUN RAGHUPATHY, SUBRAMANIAN S. MEIYAPPAN
  • Patent number: 9787649
    Abstract: Controlling access to position information at a receiver, or at another device external to the receiver. Various considerations, including a requested service type, a user type, a device type, a software application type, a payment, and/or other characteristics associated with a particular software application or distributor of that software application, may be used to control access to position information.
    Type: Grant
    Filed: January 9, 2016
    Date of Patent: October 10, 2017
    Assignee: NextNav, LLC
    Inventors: Arun Raghupathy, Subramanian S. Meiyappan, Deepak Joseph, Varaprasad Vajjhala
  • Publication number: 20170230925
    Abstract: Synchronizing the local time of beacons. Systems and methods discipline a high-stability local clock of a designated beacon within a geographic region to a network time, and synchronize a local clock of another beacon within the geographic region to the network time.
    Type: Application
    Filed: April 25, 2017
    Publication date: August 10, 2017
    Inventors: SUBRAMANIAN S. MEIYAPPAN, WOUTER PELGRUM, ARUN RAGHUPATHY
  • Patent number: 9591438
    Abstract: Systems and methods are described for determining position of a receiver. The positioning system comprises a transmitter network including transmitters that broadcast positioning signals. The positioning system comprises a remote receiver that acquires and tracks the positioning signals and/or satellite signals. The satellite signals are signals of a satellite-based positioning system. A first mode of the remote receiver uses terminal-based positioning in which the remote receiver computes a position using the positioning signals and/or the satellite signals. The positioning system comprises a server coupled to the remote receiver. A second operating mode of the remote receiver comprises network-based positioning in which the server computes a position of the remote receiver from the positioning signals and/or satellite signals, where the remote receiver receives and transfers to the server the positioning signals and/or satellite signals.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: March 7, 2017
    Assignee: NextNav, LLC
    Inventors: Arun Raghupathy, Ganesh Pattabiraman, Subramanian S Meiyappan, Hari Sankar
  • Patent number: 9408024
    Abstract: Systems and methods are described for determining position of a receiver. The positioning system comprises a transmitter network including transmitters that broadcast positioning signals. The positioning system comprises a remote receiver that acquires and tracks the positioning signals and/or satellite signals. The satellite signals are signals of a satellite-based positioning system. A first mode of the remote receiver uses terminal-based positioning in which the remote receiver computes a position using the positioning signals and/or the satellite signals. The positioning system comprises a server coupled to the remote receiver. A second operating mode of the remote receiver comprises network-based positioning in which the server computes a position of the remote receiver from the positioning signals and/or satellite signals, where the remote receiver receives and transfers to the server the positioning signals and/or satellite signals.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: August 2, 2016
    Assignee: NextNav, LLC
    Inventors: Arun Raghupathy, Ganesh Pattabiraman, Subramanian S Meiyappan
  • Publication number: 20160165562
    Abstract: Synchronizing the local time of beacons using two way time transfer methods and hardware enabling such methods. Certain systems incorporate receive hardware into beacon circuitry used for transmitting signals so that the beacon can transmit RF signals during transmission periods, and can also receive RF signals from other beacons during non-transmission periods. Receive hardware may be incorporated into beacon circuitry such that the beacon receives an incoming signal and passes that incoming signal to a digital pre-distortion linearization module, which can process that received signal. Methods for controlling whether a beacon transmits RF signals or receives RF signals are also discussed, as are methods for using RF signals received from other beacons for synchronization.
    Type: Application
    Filed: November 30, 2015
    Publication date: June 9, 2016
    Inventors: Arun Raghupathy, Subramanian S. Meiyappan
  • Publication number: 20160161613
    Abstract: A receiver having a plurality of tracking channels for tracking received positioning signals. A pseudo random number (PRN) sequence is generated in each tracking channel. Each PRN sequence is offset from the PRN sequence generated by each other tracking channel to create a tracking window that can be extended and for which the sample rate can be set.
    Type: Application
    Filed: November 30, 2015
    Publication date: June 9, 2016
    Inventors: Arun Raghupathy, Subramanian S. Meiyappan
  • Publication number: 20160127329
    Abstract: Controlling access to position information at a receiver, or at another device external to the receiver. Various considerations, including a requested service type, a user type, a device type, a software application type, a payment, and/or other characteristics associated with a particular software application or distributor of that software application, may be used to control access to position information.
    Type: Application
    Filed: January 9, 2016
    Publication date: May 5, 2016
    Inventors: Arun RAGHUPATHY, Subramanian S. MEIYAPPAN, Deepak JOSEPH, Varaprasad VAJJHALA
  • Publication number: 20160124069
    Abstract: Estimating a two-dimensional position of a receiver based on an altitude of an object other than the receiver in a geographical region within which the receiver is believed to reside. In one embodiment, when a high-accuracy estimate of the receiver's altitude is available, latitude and longitude coordinates of the receiver are estimated using the high-accuracy estimate of the receiver's altitude. When the high-accuracy estimate of the receiver's altitude is not available, the latitude and longitude coordinates of the receiver are estimated using an alternative altitude value that is based on one or more altitudes of one or more things other than the receiver.
    Type: Application
    Filed: October 12, 2015
    Publication date: May 5, 2016
    Inventors: Andrew Sendonaris, Subramanian S. Meiyappan, Jagadish Venkataraman
  • Publication number: 20150289089
    Abstract: Systems and methods are described for determining position of a receiver. The positioning system comprises a transmitter network including transmitters that broadcast positioning signals. The positioning system comprises a remote receiver that acquires and tracks the positioning signals and/or satellite signals. The satellite signals are signals of a satellite-based positioning system. A first mode of the remote receiver uses terminal-based positioning in which the remote receiver computes a position using the positioning signals and/or the satellite signals. The positioning system comprises a server coupled to the remote receiver. A second operating mode of the remote receiver comprises network-based positioning in which the server computes a position of the remote receiver from the positioning signals and/or satellite signals, where the remote receiver receives and transfers to the server the positioning signals and/or satellite signals.
    Type: Application
    Filed: May 26, 2015
    Publication date: October 8, 2015
    Inventors: Arun Raghupathy, Ganesh Pattabiraman, Subramanian S. Meiyappan