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公开(公告)号：US11682312B2
公开(公告)日：2023-06-20
申请号：US16516937
申请日：2019-07-19
发明人： Tamara Casey , Santanu Dutta , Michael Gagne
CPC分类号： G08G5/025 , B64D45/04 , G05D1/0088 , G05D1/101 , G08G5/0013 , G08G5/0069 , G08G5/045 , H04W4/40 , B64D2045/0085
摘要： The present disclosure includes devices, systems, and methods for autonomously landing unmanned aerial vehicles (UAVs) with collaborative information sharing and without a central coordinating entity. In one embodiment, the present disclosure includes an unmanned aerial vehicle including a communication interface, a memory; and an electronic processor. The communication interface is configured to establish a wireless communication link with one or more unmanned aerial vehicles. The electronic processor configured to autonomously coordinate landings at a landing strip with the one or more unmanned aerial vehicles to prevent collisions exchanging messages with the one or more unmanned aerial vehicles via the wireless communication link according to a collision avoidance protocol, and wherein the autonomous coordination occurs without a central coordination entity.
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公开(公告)号：US11632168B2
公开(公告)日：2023-04-18
申请号：US17205798
申请日：2021-03-18
发明人： Dunmin Zheng , Santanu Dutta , Gary Churan
摘要： Devices, methods, and systems for uplink synchronization in time division multiple access (TDMA) satellite network. In one embodiment, an earth-based satellite terminal is configured to communicate with a satellite hub through a satellite using the TDMA communication protocol. The earth-based satellite terminal is configured to determine its own location, a location of the satellite, estimate a distance between the location of the terminal and the location of the satellite, determine a Coarse Timing Advance based on the distance that is estimated, and transmit data to the satellite based on the Coarse Timing Advance and the TDMA communication protocol. The Coarse Timing Advance may allow uplink TDMA communication without a preamble transmission on a random access channel, the preamble transmission being required in many conventional systems.
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公开(公告)号：US20220224403A1
公开(公告)日：2022-07-14
申请号：US17574121
申请日：2022-01-12
申请人： ATC TECHNOLOGIES LLC
发明人： Santanu Dutta
IPC分类号： H04B7/185
摘要： Systems and methods operating a spotbeam satellite network. One example embodiment provides a satellite broadcast system. The system includes an electronic processor communicatively coupled to a satellite, and a user equipment. The electronic processor receives a plurality of bearer signals, each bearing identical broadcast or multicast program information. For each of the plurality of bearer signals, the electronic processor generates one of a plurality of spotbeams for transmission by the satellite within a coverage area. The electronic processor introduces into the bearer signal of each spotbeam of the plurality of spotbeams a differential delay with respect to the bearer signals of each of the other spotbeams of the plurality of spotbeams The user equipment is receives the bearer signals from a plurality of adjacent spotbeams of the plurality of spotbeams. The user equipment constructively utilizes the bearer signals received from the plurality of adjacent spotbeams to decode the program information.
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公开(公告)号：US11070266B2
公开(公告)日：2021-07-20
申请号：US16796322
申请日：2020-02-20
发明人： Dunmin Zheng , Santanu Dutta
摘要： Systems and methods for adaptive beamforming for a mobile satellite system (MSS). Embodiments described herein provide individual-user-optimized, adaptive beamforming. One example system creates a user beam optimized based either on known user locations or the waveforms received from all cochannel users. The user beam maximizes the signal-to-interference-noise relative to the desired user, both in the forward and return links. The optimization process considers the spatial distribution of all cochannel users in the footprint of the satellite. The user beam adapts to the user's location and co-channel interference environment.
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公开(公告)号：US20210211191A1
公开(公告)日：2021-07-08
申请号：US17205798
申请日：2021-03-18
发明人： Dunmin Zheng , Santanu Dutta , Gary Churan
摘要： Devices, methods, and systems for uplink synchronization in time division multiple access (TDMA) satellite network. In one embodiment, an earth-based satellite terminal is configured to communicate with a satellite hub through a satellite using the TDMA communication protocol. The earth-based satellite terminal is configured to determine its own location, a location of the satellite, estimate a distance between the location of the terminal and the location of the satellite, determine a Coarse Timing Advance based on the distance that is estimated, and transmit data to the satellite based on the Coarse Timing Advance and the TDMA communication protocol. The Coarse Timing Advance may allow uplink TDMA communication without a preamble transmission on a random access channel, the preamble transmission being required in many conventional systems.
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公开(公告)号：US20200374976A1
公开(公告)日：2020-11-26
申请号：US16881322
申请日：2020-05-22
发明人： Santanu Dutta , Ajay Parikh
摘要： Hybrid self-organizing networks. One example system includes a cellular network and a mobile satellite network. The cellular network includes a cellular base station configured to perform at least one cellular interference mitigation measure. The cellular network is configured to provide wireless communications in a first frequency band within a first deployed area. The mobile satellite network includes a mobile satellite network terminal configured to perform at least one satellite interference mitigation measure. The mobile satellite network is configured to provide wireless communications in the first frequency band within a second deployed area separated from the first deployed area by a first standoff distance. Performance of one or both of the at least one cellular interference mitigation measure and the at least one satellite interference mitigation measure results in a second standoff distance that is less than the first standoff distance.
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7.发明公开公开(公告)号：US20240194082A1
公开(公告)日：2024-06-13
申请号：US18206757
申请日：2023-06-07
发明人： Tamara Casey , Santanu Dutta , Michael Gagne
CPC分类号： G08G5/025 , B64D45/04 , G08G5/0013 , G08G5/0069 , G08G5/045 , H04W4/40 , B64D2045/0085
摘要： The present disclosure includes devices, systems, and methods for autonomously landing unmanned aerial vehicles (UAVs) with collaborative information sharing and without a central coordinating entity. In one embodiment, the present disclosure includes an unmanned aerial vehicle including a communication interface, a memory; and an electronic processor. The communication interface is configured to establish a wireless communication link with one or more unmanned aerial vehicles. The electronic processor configured to autonomously coordinate landings at a landing strip with the one or more unmanned aerial vehicles to prevent collisions exchanging messages with the one or more unmanned aerial vehicles via the wireless communication link according to a collision avoidance protocol, and wherein the autonomous coordination occurs without a central coordination entity.
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公开(公告)号：US11984951B2
公开(公告)日：2024-05-14
申请号：US17323289
申请日：2021-05-18
发明人： Dunmin Zheng , Santanu Dutta
CPC分类号： H04B7/0617 , H04B7/18513 , H04B7/18515 , H04B7/18541 , H04B7/2041 , H04B7/216
摘要： Systems and methods for adaptive beamforming for a mobile satellite system (MSS). Embodiments described herein provide individual-user-optimized, adaptive beamforming. One example system creates a user beam optimized based either on known user locations or the waveforms received from all cochannel users. The user beam maximizes the signal-to-interference-noise relative to the desired user, both in the forward and return links. The optimization process considers the spatial distribution of all cochannel users in the footprint of the satellite. The user beam adapts to the user's location and co-channel interference environment.
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9.发明授权公开(公告)号：US11909503B2
公开(公告)日：2024-02-20
申请号：US17387017
申请日：2021-07-28
发明人： Santanu Dutta , Dunmin Zheng
CPC分类号： H04B7/18513 , H04B7/18515
摘要： Systems and methods operating a spotbeam satellite network to provide single frequency network broadcast and multicast services. One example embodiment provides a satellite broadcast system. The system includes an electronic processor communicatively coupled to a satellite and a user equipment. The electronic processor is configured to receive a plurality of bearer signals, each bearing identical broadcast program information. The electronic processor is configured to, for each of the plurality of bearer signals, generate one of a plurality of spotbeams for transmission by the satellite within a coverage area. The user equipment is configured to receive the bearer signals from a plurality of adjacent spotbeams of the plurality of spotbeams. The user equipment is configured to constructively utilize the bearer signals received from the plurality of adjacent spotbeams to decode the program information.
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公开(公告)号：US20210266087A1
公开(公告)日：2021-08-26
申请号：US17180079
申请日：2021-02-19
申请人： ATC Technologies LLC
发明人： Santanu Dutta , Gary Churan , Dunmin Zheng
摘要： The present disclosure describes the concept of operations and the medium access control protocols of a wireless communication system using code-division multiple access with interference avoidance (CDMA-IA) as its physical layer. The system can dynamically share a common band with other networks without a central radio resource controller. In one embodiment, the wireless communication system includes a plurality of radio nodes forming a wireless mesh network, wherein the pairs of radio nodes use, individually optimized, time division duplexing. At least one radio node includes a software-defined radio, a memory, and an electronic processor. The electronic processor is configured to control the software-defined radio to transmit a pilot signal and share various state information with the other nodes of the network. The shared information includes local spectrum occupancy and node connectivity sets. The pervasive sharing of spectrum occupancy among all nodes enables the usage of the shared band to be maximized.
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