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公开(公告)号：US11265078B2
公开(公告)日：2022-03-01
申请号：US16668055
申请日：2019-10-30
申请人： Viasat, Inc.
摘要： 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. The satellite communications system may employ a satellite with a feed array assembly and may use on-board beamforming or ground-based beamforming. Beam hopping within timeslots of the frame may be used to provide coverage to different cells in different time periods. The flexible coverage areas may be provided using changes in satellite position, antenna patterns, or beam resource allocations.
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72.发明授权公开(公告)号：US11258172B2
公开(公告)日：2022-02-22
申请号：US16800557
申请日：2020-02-25
申请人： Viasat Inc.
发明人： Donald L. Runyon , Sharad V. Parekh
IPC分类号： H01Q5/45 , H01Q19/19 , H01Q1/08 , H01Q1/12 , H01Q1/28 , H01Q3/08 , H01Q3/18 , H01Q15/14 , H01Q19/13 , H01Q25/00 , H04H40/90 , H04B7/185
摘要： A multi-beam antenna including a reflector having a single reflector surface defining a first focal region and a second focal region. A first feed group located within the first focal region includes a first feed oriented relative to the reflector to define a first beam pointed in a first direction. The multi-beam antenna further includes a fixed attachment mechanism attaching the first feed group to the reflector such that a position of the first feed group is fixed relative to the reflector. The multi-beam antenna further includes a second feed group located within the second focal region that includes a second feed oriented relative to the reflector to define a second beam pointed in a second direction. The multi-beam antenna further includes an adjustable attachment mechanism attaching the second feed group to the reflector, whereby a difference between the first direction and the second direction is adjustable.
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公开(公告)号：US11252210B2
公开(公告)日：2022-02-15
申请号：US17172757
申请日：2021-02-10
申请人： ViaSat, Inc.
IPC分类号： H04L29/06 , H04L12/18 , H04B7/185 , H04L12/911 , H04L29/08 , H04L12/743
摘要： Methods, apparatuses, and systems are provided for improving utilization of the satellite communications system through various “deltacasting” techniques for handling content sets (e.g., feeds or websites). Embodiments operate in a client-server context, including a server optimizer, a client optimizer, and, in some embodiments, a pre-positioning client. Within this client-server context, content sets are multicast (e.g., anticipatorily pre-positioned in a local dictionary) to end users of the communications system and are handled at the content set level, according to set-level metadata and/or user preferences. In some embodiments, when locally stored information from the content sets is requested by a user, deltacasting techniques are used to generate fingerprints for use in identifying and exploit multicasting and/or other opportunities for increased utilization of links of the communications system.
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公开(公告)号：US11245467B2
公开(公告)日：2022-02-08
申请号：US16634516
申请日：2018-01-25
申请人： VIASAT, INC.
发明人： Mark Dankberg
摘要： Systems and methods are described for scintillation mitigation in satellite communications systems with geographically distributed access nodes. Some embodiments operate in context of a bent-pipe satellite that illuminates user and gateway coverage areas with fixed spot beams. Beamforming can be used, along with coordinated, phase-synchronized communication by the distributed access nodes, to generate signals that coherently combine via the satellite. Scintillation and/or other atmospheric irregularities can degrade phase synchronization at the access nodes. Accordingly, embodiments can monitor phase tracking performance of the access nodes to detect when a phase tracking error occurs in at least one of the access nodes. In response to detecting the phase tracking error, embodiments can inhibit transmitting of forward uplink data signals by at least that access node.
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公开(公告)号：US20220038175A1
公开(公告)日：2022-02-03
申请号：US17387721
申请日：2021-07-28
申请人： ViaSat, Inc.
发明人： Kenneth V. Buer , Clifford K. Burdick , Ian A. Cleary , Ramanamurthy V. Darapu , David H. Irvine , Philip A. Lampe
IPC分类号： H04B7/185
摘要： The described features generally relate to determining dynamic signal quality criteria for an installation of satellite terminals for communications in a satellite communications system. In particular, the signal quality criteria for an installation may be based on an identified position of the satellite terminal to be installed, and in some examples based on the positions and signal characteristics of neighboring satellite terminals that have already been installed. In some examples, a signal quality map may be generated for a service beam coverage area, based on predetermined transmission characteristics and/or measured transmissions from a number of satellite terminals served by a communications satellite. The generated signal quality map may then be used to determine a signal quality threshold for the installation of a satellite terminal being installed for communications in a satellite communications system.
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76.发明申请公开(公告)号：US20220005770A1
公开(公告)日：2022-01-06
申请号：US17372797
申请日：2021-07-12
申请人： VIASAT, INC.
IPC分类号： H01L23/66 , H01L21/50 , H01L23/498 , H01L23/538 , H01Q1/22 , H01Q1/38
摘要： Disclosed is an antenna apparatus including a substrate having a cavity in a first outer surface thereof. The substrate has a sidewall defining a portion of the cavity, and a first edge contact is formed at the sidewall. An IC chip is disposed within the cavity and has a side surface facing the sidewall and a second edge contact formed on the side surface electrically connected to the first edge contact. An antenna element, disposed at a second outer surface of the substrate opposite the first outer surface, is electrically connected to RF circuitry within the IC chip through a conductive via extending within the substrate.
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公开(公告)号：US20210384965A1
公开(公告)日：2021-12-09
申请号：US17375485
申请日：2021-07-14
申请人： ViaSat, Inc.
IPC分类号： H04B7/185 , H04B7/06 , H04W84/06 , H01Q19/13 , H01Q21/24 , H01Q25/00 , H04B7/024 , H04B7/0413 , H04W4/00 , H04B7/204 , H01Q3/40 , H04W76/10 , H01Q5/50 , H01Q1/06 , H01Q1/28 , H01Q3/24 , H01Q21/00 , H04W16/28 , H04W40/20 , H04B10/118
摘要： 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.
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公开(公告)号：US11176219B1
公开(公告)日：2021-11-16
申请号：US16502688
申请日：2019-07-03
申请人： Viasat, Inc.
IPC分类号： G06F16/957 , H04L29/08 , G06F16/955
摘要： The present invention relates to systems, apparatus, and methods of accelerating web transactions. One embodiment includes observing, with a web browser plug-in operating on a computer, at least a portion of a first web page transaction in a web browser operating on the computer. A web browser module may be used to identify transaction information from the observing of the at least a portion of the first web page transaction. The browser may communicates transaction information to a prefetching system in a communication separate from the first web page transaction; and the transaction information may be used to perform a prefetch operation.
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公开(公告)号：US11171716B2
公开(公告)日：2021-11-09
申请号：US16811556
申请日：2020-03-06
申请人： ViaSat, Inc.
发明人： Kenneth V. Buer , Mark J. Miller
IPC分类号： H04B7/185 , H04B7/06 , H04W84/06 , H01Q19/13 , H01Q21/24 , H01Q25/00 , H04B7/024 , H04B7/0413 , H04W4/00 , H04B7/204 , H01Q3/40 , H04W76/10 , H01Q5/50 , H01Q1/06 , H01Q1/28 , H01Q3/24 , H01Q21/00 , H04W16/28 , H04W40/20 , H04B10/118 , H01Q1/24 , H04W16/26
摘要： 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.
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公开(公告)号：US11165151B2
公开(公告)日：2021-11-02
申请号：US16403439
申请日：2019-05-03
申请人： VIASAT, INC.
发明人： Donald L Runyon
摘要： Systems, devices, and methods for determining and applying true time delay (TTD) values for compensating for free-space path length differences between a phased array and a reflector in wideband communication are disclosed. TTD values are determined for individual and groups of antenna elements in phased array fed reflector (PAFR) antennas based distances from a focal region of the reflector. The distance from the focal region of the reflector and the offset of the phased array from the reflectors focal plane can be used to determine path length differences. Corresponding TTD values for antenna elements are then determined based on the path length difference associated with the antenna elements. Each antenna element can be coupled to a TTD element to provide the corresponding TTD value to the signals received by and generated by the antenna elements of the phased array. The TTD elements include transverse electromagnetic (TEM) mode mechanisms.
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