Patents Assigned to Viasat, Inc.
  • Patent number: 10320073
    Abstract: Systems and methods for aligning a satellite antenna mounted on a mobile platform to the platform are disclosed. At each of several arbitrary orientations, a first directional vector is determined from the antenna to a satellite. For each orientation, an alias transformation is performed to transform the first vector having coordinates defined with respect to a first reference frame to a second vector having coordinates defined with respect to a second reference frame. A third vector is determined based on the orientation of the antenna after peaking the antenna. A rotation matrix is derived from the collection of second and third vectors. An estimate of the rotational offset of the satellite antenna with respect to the platform is determined based on the rotation matrix. The rotational offset is applied to the attitude of the platform to accurately point the antenna to the satellite.
    Type: Grant
    Filed: January 12, 2015
    Date of Patent: June 11, 2019
    Assignee: Viasat, Inc.
    Inventors: Brian T. Sleight, David H. Schmitz, Clifford K. Burdick, Arthur S. Loh
  • Patent number: 10320042
    Abstract: Methods, systems, and devices are described that include one or more sidewall features to improve performance of a waveguide device. In particular, the sidewall features may be utilized within a polarizer section of a polarizer device such as a septum polarizers. The sidewall feature(s) may include recesses and/or protrusions. When a plurality of sidewall features are employed, the size, shape, spacing and kind (e.g., recess or protrusion) may vary according to a particular design.
    Type: Grant
    Filed: August 24, 2018
    Date of Patent: June 11, 2019
    Assignee: Viasat, Inc.
    Inventor: Anders Jensen
  • Patent number: 10320472
    Abstract: Systems and methods are described for robust scheduling of beam switching patterns in satellite communications systems. Embodiments operate in context of a hub-spoke satellite communications architecture having a number of gateway terminals servicing large numbers of user terminals over a number of spot beams. The satellite includes switching subsystems that distribute capacity to the user beams from multiple of the gateway terminals in a shared manner according to a beam group switching pattern. The beam group switching pattern is robustly formulated to continue distributing capacity during gateway outages (e.g., when one or two gateway terminals are temporarily non-operational due to rain fade, equipment failure, etc.). For example, the beam group switching pattern can be formulated to minimize worst-case degradation of capacity across user beams, to prioritize certain beams or beam groups, etc.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: June 11, 2019
    Assignee: VIASAT, INC.
    Inventors: John Hai O'Neill, Donald W. Becker, Mark J. Miller
  • Publication number: 20190170846
    Abstract: A system and method of the disclosure relates to satellite tracking. The system may comprise a tracking receiver that includes a first analog-to-digital (A/D) converter coupled between a sum input and a digital signal processor (DSP), a second A/D converter coupled between a difference input and the DSP, and a calibration output coupled to the sum input and coupled to the difference input. The first A/D converter may convert an signal received at the sum input into a sum digital signal, and provide the sum digital signal to the DSP. The second A/D converter may convert an signal received at the difference input into a difference digital signal, and provide the difference digital signal to the DSP. The tracking receiver may generate an calibration signal and provide the calibration signal through the calibration output.
    Type: Application
    Filed: December 4, 2018
    Publication date: June 6, 2019
    Applicant: VIASAT, INC.
    Inventors: CHRISTOPHER A. ROSE, BRIAN D. CHANDLER, DAVID E. SINYARD, CHARLES M. LUKE
  • Patent number: 10313002
    Abstract: Systems and methods for supporting more flexible coverage areas and spatial capacity assignments using satellite communications systems are disclosed. A hub-spoke, bent-pipe satellite communications system includes: terminals; gateways; a controller for specifying data for controlling satellite operations in accordance with a frame definition including timeslots for a frame and defining an allocation of capacity between forward and return traffic; and a satellite including: pathways; at least one LNA, an output of which is for coupling to a pathway and to amplify uplink beam signals in accordance with the allocation; and at least one HPA, an input of which is for coupling to the pathway and to amplify downlink beam signals in accordance with the allocation, and wherein the frame definition specifies at least one pathway as a forward pathway for at least one timeslot and as a return pathway for at least one other timeslot in the frame.
    Type: Grant
    Filed: October 19, 2015
    Date of Patent: June 4, 2019
    Assignee: VIASAT, INC.
    Inventors: Mark J Miller, Charles N Pateros
  • Patent number: 10313000
    Abstract: Methods and systems are described for providing end-to-end beamforming. For example, end-to-end beamforming systems include end-to-end relays and ground networks to provide communications to user terminals located in user beam coverage areas. The ground segment can include geographically distributed access nodes and a central processing system. Return uplink signals, transmitted from the user terminals, have multipath induced by a plurality of receive/transmit signal paths in the end to end relay and are relayed to the ground network. The ground network, using beamformers, recovers user data streams transmitted by the user terminals from return downlink signals. The ground network, using beamformers generates forward uplink signals from appropriately weighted combinations of user data streams that, after relay by the end-end-end relay, produce forward downlink signals that combine to form user beams.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: June 4, 2019
    Assignee: VIASAT, INC.
    Inventors: Kenneth V. Buer, Mark J. Miller, Christopher J. Cronin, Mark D Dankberg, Donald L. Runyon
  • Patent number: 10305199
    Abstract: In an exemplary embodiment, a phased array antenna comprises multiple subcircuits in communication with multiple radiating elements. The radio frequency signals are independently adjusted for both polarization control and beam steering. In a receive embodiment, multiple RF signals of various polarizations are received and combined into at least one receive beam output. In a transmit embodiment, at least one transmit beam input is divided and transmitted through multiple radiating elements, with the transmitted beams having various polarizations. In an exemplary embodiment, the phased array antenna provides multi-beam formation over multiple operating frequency bands. The wideband nature of the active components allows for operation over multiple frequency bands simultaneously.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: May 28, 2019
    Assignee: VIASAT, INC.
    Inventors: David W. Corman, Rob Zienkewicz, David Saunders
  • Patent number: 10305581
    Abstract: Systems and methods are described herein for performing mispointing correction operations that can provide accurate pointing of an antenna towards a satellite, while also satisfying interference requirements with other satellites. As a result, the mispointing correction operations described herein can improve resource efficiency of communication systems using such antennas and help ensure compliance with interference requirements of other satellites.
    Type: Grant
    Filed: September 19, 2016
    Date of Patent: May 28, 2019
    Assignee: Viasat, Inc.
    Inventors: James E Petranovich, Bradley H Smith, Eric L Cross, Douglas J Merrell, Samuel C Finney
  • Patent number: 10305579
    Abstract: Disclosed is a satellite communication system that allocates bandwidth to maximize the capacity of the communication system while providing service to geographical areas having different demands. A smaller portion of the frequency spectrum can be allocated for subscriber beams that supply service to low demand areas. A larger portion of the frequency spectrum can be provided to subscriber beams that provide access to high demand areas. Allocation of bandwidth can be determined by the amount of demand in low demand areas versus the amount of demand in high demand areas. High demand gateways are physically located in low demand subscriber beams, while low demand gateways are physically located in high demand subscriber beams, which prevents interference.
    Type: Grant
    Filed: April 13, 2017
    Date of Patent: May 28, 2019
    Assignee: Viasat, Inc.
    Inventor: Erwin C. Hudson
  • Publication number: 20190157734
    Abstract: Methods, systems, and devices are described that include one or more septum features to improve performance of a waveguide device. In particular, the septum features may be utilized within a polarizer section of a polarizer device such as a septum polarizers. The septum feature(s) may be a ridge. When a plurality of septum features are employed, the location, size, shape and spacing may vary according to a particular design.
    Type: Application
    Filed: July 10, 2018
    Publication date: May 23, 2019
    Applicant: VIASAT, INC.
    Inventors: SHARAD V PAREKH, DOMINIC Q NGUYEN
  • Publication number: 20190157741
    Abstract: In an example embodiment, an azimuth combiner comprises: a septum layer comprising a plurality of septum dividers; first and second housing layers attached to first and second sides of the septum layer; a linear array of ports on a first end of the combiner; wherein the first and second housing layers each comprise waveguide H-plane T-junctions; wherein the waveguide T-junctions can be configured to perform power dividing/combining; and wherein the septum layer evenly bisects each port of the linear array of ports. A stack of such azimuth combiners can form a two dimensional planar array of ports to which can be added a horn aperture layer, and a grid layer, to form a dual-polarized, dual-BFN, dual-band antenna array.
    Type: Application
    Filed: January 25, 2019
    Publication date: May 23, 2019
    Applicant: VIASAT, INC.
    Inventors: DONALD L. RUNYON, DOMINIC Q. NGUYEN, JAMES W. MAXWELL
  • Patent number: 10284284
    Abstract: Systems and methods are described for paired-beam satellite communications in a flexible satellite architecture. Embodiments include one or more “bent pipe” satellites having multiple transponders for servicing a number of spot beams. Implementations include novel types of paired-beam transponders that communicatively couple gateway terminals and user terminals in different spot beams. Some implementations also include loopback transponders that communicatively couple gateway terminals and user terminals in the same spot beam. The transponders can use similar components, can provide for flexible forward-link and return-link spectrum allocation, and/or can provide other features. Certain embodiments further include support for utility gateway terminal service and/or redundancy (e.g., active spares) for one or more active components.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: May 7, 2019
    Assignee: VIASAT, INC.
    Inventors: Aaron J Mendelsohn, Mark J Miller
  • Patent number: 10283837
    Abstract: Methods, systems, and devices are described for mounting an antenna assembly to a vehicle, whereby rotational degrees of freedom between the antenna assembly and the vehicle are constrained. For example, an antenna mount may employ an intermediate structure between the antenna assembly and the vehicle. In various examples, the intermediate structure may be coupled with one of the vehicle or the antenna assembly by a linear coupling, and the intermediate structure may be coupled with the other of the vehicle or the antenna assembly by a planar coupling. The antenna assembly may be coupled with the vehicle by a compliant coupling that provides a centering force between the antenna assembly and the vehicle. According to various examples, rotational movement between the antenna assembly and the vehicle may be suppressed, and vibration from the vehicle to the antenna assembly may be attenuated.
    Type: Grant
    Filed: October 18, 2016
    Date of Patent: May 7, 2019
    Assignee: Viasat, Inc.
    Inventors: Kenneth J. Larson, Steven L. Shrinkle
  • Patent number: 10277514
    Abstract: Methods and systems for individual forward-link and return-link policies for network communication are disclosed. In some aspects, the individual forward-link and return-link policies define how data is routed over a plurality of access networks between a client-side enforcement unit and a provider-side enforcement unit. In some aspects, the individual policies may be based on metrics collected by the client-side and provider-side enforcement units, which may be positioned on each end of one or more access networks.
    Type: Grant
    Filed: July 21, 2016
    Date of Patent: April 30, 2019
    Assignee: VIASAT, INC.
    Inventor: Girish Chandran
  • Patent number: 10277308
    Abstract: Systems and methods are described herein for adaptive pointing operations of a mobile antenna system that can be used to provide communication with a target satellite over a large geographical area, while also satisfying interference requirements with one or more other satellites. In particular, the adaptive pointing operations described herein control pointing of a beam of the antenna system towards the target satellite in a manner that takes into consideration the interference requirements of the other satellites. In some embodiments, the mobile antenna system can provide non-interfering communication with the target satellite, over the entire or substantially the entire coverage area (or footprint) of the target satellite. In doing so, services such as Internet, telephone and/or television services provided by the target satellite can be delivered to users throughout most or all of the satellite's coverage area, while also satisfying interference requirements with other satellites.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: April 30, 2019
    Assignee: Viasat, Inc.
    Inventors: Eric L Cross, Samuel C Finney
  • Patent number: 10278203
    Abstract: Methods, systems, and devices are described for providing network access services to mobile users via mobile terminals over a satellite system. In embodiments, dynamic multiplexing of traffic from fixed terminals and mobile users on the same satellite beam can take advantage of statistical multiplexing of large numbers of users and on different usage patterns between fixed terminals and mobile users. In embodiments, quality-of-service (QoS) is controlled for mobile devices at a per-user level. Mobile users may be provisioned on the satellite system according to a set of traffic policies based on their service level agreement (SLA). System resources of the satellite may be allocated to mobile users based on the demand of each mobile user and the set of traffic polices associated with each mobile user, regardless of which mobile terminal is used to access the system.
    Type: Grant
    Filed: July 5, 2017
    Date of Patent: April 30, 2019
    Assignee: Viasat, Inc.
    Inventors: Corey Ryan Johnson, Brian T. Sleight, Thomas Duncan Lookabaugh, James Esserman, William F. Sullivan, Meherwan Polad
  • Patent number: 10277310
    Abstract: Methods, systems, and devices are described for providing dynamic spatial allocation of satellite capacity based on aircraft load forecasting. In embodiments, a satellite communications system provides network access service over a service area via a plurality of satellite user beams, predicts spatial network resource demand for the service area over one or more service periods based at least in part on forecasted travel paths of a plurality of mobile multi-user terminals over the one or more service periods and respective predicted service demands for the plurality of mobile multi-user terminals, determines a satellite capacity resource configuration for the plurality of satellite user beams for the one or more service periods based on the predicted spatial network resource demand, and then adapts at least one characteristic of the plurality of satellite user beams for the one or more service periods based on the determined satellite capacity resource configuration.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: April 30, 2019
    Assignee: Viasat, Inc.
    Inventor: George M. Peponides
  • Publication number: 20190123813
    Abstract: Broadband satellite communications systems using optical feeder links are disclosed. Various optical modulation schemes are disclosed that can provide improved capacity for fixed spot beam, on board beamforming, and ground-based beamforming broadband satellite systems.
    Type: Application
    Filed: June 29, 2018
    Publication date: April 25, 2019
    Applicant: VIASAT, INC.
    Inventor: AARON J MENDELSOHN
  • Patent number: 10270842
    Abstract: Systems and methods are described for avoiding redundant data transfers using delta coding techniques when reliably and opportunistically communicating data to multiple user systems. According to embodiments, user systems track received block sequences for locally stored content blocks. An intermediate server intercepts content requests between user systems and target hosts, and deterministically chucks and fingerprints content data received in response to those requests. A fingerprint of a received content block is communicated to the requesting user system, and the user system determines based on the fingerprint whether the corresponding content block matches a content block that is already locally stored. If so, the user system returns a set of fingerprints representing a sequence of next content blocks that were previously stored after the matching content block.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: April 23, 2019
    Assignee: ViaSat, Inc.
    Inventor: David Lerner
  • Patent number: 10263791
    Abstract: Examples for acceleration of online certificate status checking with an Internet hinting service are disclosed. For example, one method includes receiving, by a computing device from a hinting server, hint information comprising certificate information; receiving, from a remote computing device, a certificate in response to a request to establish secure communications with the remote computing device; and determining a validity of the certificate based on the certificate information.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: April 16, 2019
    Assignee: VIASAT, INC.
    Inventors: Michael J Schexnaydre, Peter J Lepeska, Douglas C Larrick