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公开(公告)号：US20250126011A1
公开(公告)日：2025-04-17
申请号：US19000388
申请日：2024-12-23
Applicant: Space Exploration Technologies Corp.
Inventor： Martin S. McCormick , Feipeng Wang
Abstract: A wireless communications system includes a pre-distortion actuator configured to receive a carrier-modulated signal and convert the carrier-modulated signal into an output signal, the pre-distortion actuator comprising a behavioral model that models a transmit chain of the system including at least one antenna and predict an input-output relationship of the transmit chain of the system between an input to the transmit chain to an output of the transmit chain. The system includes a phased antenna array configured to transmit the output signal. The phased antenna array includes a plurality of antenna elements. The pre-distortion actuator is configured to generate the output signal by applying a correction to the carrier-modulated input signal that cancels out nonlinearities The behavioral model is updated based on feedback from a receiver from a previous output signal transmitted to the receiver.
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公开(公告)号：US12088398B1
公开(公告)日：2024-09-10
申请号：US17186627
申请日：2021-02-26
Applicant: Space Exploration Technologies Corp.
Inventor： Martin S. McCormick , Torbjorn Larsson , Alazar Tamrat , Jeffrey C. Strait , Chen Chen , Philip J. Treigherman , Stephan O. Roche , Ronald Gottula
CPC classification number: H04B7/18513 , H04B7/18517 , H04L5/001 , H04L25/0202 , H04L27/0014 , H04L27/2636 , H04L2027/0026
Abstract: A modem is configurable on a satellite, user terminal or gateway generates a radio frequency (RF) signal using an orthogonal frequency division multiplexing (OFDM) protocol including a radio frame including one or more bursts. A burst of the one or more bursts includes a first portion including burst detection data, a second portion including channel characteristic estimation data, a third portion including payload data, and fourth and fifth portions including pilot data. The first portion in a time domain is included in the burst prior to the second, third, fourth, and fifth portions. The first portion can include a pseudo-random noise sequence inserted in the time domain. The same physical modem can be configured to transmit signals on an uplink or downlink between a user terminal and a satellite or on the uplink or downlink between the satellite and the gateway.
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公开(公告)号：US12074683B1
公开(公告)日：2024-08-27
申请号：US17186706
申请日：2021-02-26
Applicant: Space Exploration Technologies Corp.
Inventor： Martin S. McCormick , Torbjorn Larsson , Alazar Tamrat , Jeffrey C. Strait , Chen Chen , Philip J. Treigherman , Stephan O. Roche , Ronald Gottula
IPC: H04B7/185 , H04L5/00 , H04W72/0453
CPC classification number: H04B7/18513 , H04L5/0048 , H04W72/0453
Abstract: A modem is configurable on a satellite, user terminal or gateway generates a radio frequency (RF) signal using an orthogonal frequency division multiplexing (OFDM) protocol including a radio frame including one or more bursts. A burst of the one or more bursts includes a first portion including burst detection data, a second portion including channel characteristic estimation data, a third portion including payload data, and fourth and fifth portions including pilot data. The first portion in a time domain is included in the burst prior to the second, third, fourth, and fifth portions. The first portion can include a pseudo-random noise sequence inserted in the time domain. The same physical modem can be configured to transmit signals on an uplink or downlink between a user terminal and a satellite or on the uplink or downlink between the satellite and the gateway.
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公开(公告)号：US11924821B1
公开(公告)日：2024-03-05
申请号：US17339860
申请日：2021-06-04
Applicant: Space Exploration Technologies Corp.
Inventor： Peter J. Worters , Martin S. McCormick , Andrew G. Whitlow
IPC: H04W72/121 , H04B7/185 , H04L5/16 , H04W56/00 , H04W72/1273
CPC classification number: H04W72/121 , H04B7/18513 , H04L5/16 , H04W56/0045 , H04W56/0055 , H04W72/1273
Abstract: Systems, methods, and non-transitory media are provided for timing half-duplex transmissions in a wireless communication system. An example method can include receiving, by a user terminal (UT), a radio frame transmitted by a satellite to a group of UTs; identifying an offset delay defined in the radio frame for scheduling transmissions between the satellite and each UT in the group of UTs, the offset delay providing non-overlapping time intervals for receive, process, and transmit operations at each UT; determining, based on the offset delay and a time when the radio frame was received by the UT, a time for transmitting an uplink radio burst to the satellite, wherein the uplink radio burst transmitted at the time is estimated to arrive at the satellite within a same radio frame interval as uplink radio bursts from other UTs; and transmitting, to the satellite, the uplink radio burst at the time.
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公开(公告)号：US12177060B2
公开(公告)日：2024-12-24
申请号：US18205958
申请日：2023-06-05
Applicant: Space Exploration Technologies Corp.
Inventor： Martin S. McCormick , Feipeng Wang
Abstract: A wireless communications system includes a pre-distortion actuator configured to receive a carrier-modulated signal and convert the carrier-modulated signal into an output signal, the pre-distortion actuator comprising a behavioral model that models a transmit chain of the system including at least one amplifier and at least one antenna and predict an input-output relationship of the transmit chain of the system between an input to the transmit chain to an output of the transmit chain. The system includes a phased antenna array configured to transmit the output signal. The phased antenna array includes a plurality of antenna elements, each antenna element electrically coupled to a respective power amplifier. The pre-distortion actuator is configured to generate the output signal by applying a correction to the carrier-modulated input signal that cancels out nonlinearities The behavioral model is updated based on feedback from a receiver from a previous output signal transmitted to the receiver.
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Patent Agency Ranking
公开(公告)号：US12137354B1
公开(公告)日：2024-11-05
申请号：US17333809
申请日：2021-05-28
Applicant: Space Exploration Technologies Corp.
Inventor： Martin S. McCormick
Abstract: In an embodiment, an apparatus includes an antenna assembly configured to transmit and receive beams in time-varying directions, and a beam steering controller configured to determine a first beam pointing vector by searching for a satellite from a plurality of satellites included in the communication system. The antenna assembly maintains a communication link with a satellite of the plurality of satellites by determining a plurality of beam pointing vectors that converge to increasing signal quality measurements, the satellite associated with the first beam pointing vector. The beam steering controller is configured to obtain, from the satellite, satellite ephemeris information of the satellite and one or more of remaining satellites of the plurality of satellites. The beam steering controller is configured to determine an orientation of the antenna assembly based on the satellite ephemeris information and the plurality of beam pointing vectors.
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公开(公告)号：US12003350B1
公开(公告)日：2024-06-04
申请号：US17186657
申请日：2021-02-26
Applicant: Space Exploration Technologies Corp.
Inventor： Martin S. McCormick , Torbjorn Larsson , Alazar Tamrat , Jeffrey C. Strait , Chen Chen , Philip J. Treigherman , Stephan O. Roche , Ronald Gottula
IPC: H04L25/02 , H04B7/185 , H04L5/00 , H04W72/044
CPC classification number: H04L25/0202 , H04B7/1851 , H04L5/0048 , H04W72/044
Abstract: A modem is configurable on a satellite, user terminal or gateway generates a radio frequency (RF) signal using an orthogonal frequency division multiplexing (OFDM) protocol including a radio frame including one or more bursts. A burst of the one or more bursts includes a first portion including burst detection data, a second portion including channel characteristic estimation data, a third portion including payload data, and fourth and fifth portions including pilot data. The first portion in a time domain is included in the burst prior to the second, third, fourth, and fifth portions. The first portion can include a pseudo-random noise sequence inserted in the time domain. The same physical modem can be configured to transmit signals on an uplink or downlink between a user terminal and a satellite or on the uplink or downlink between the satellite and the gateway.
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公开(公告)号：US20240154652A1
公开(公告)日：2024-05-09
申请号：US18537420
申请日：2023-12-12
Applicant: Space Exploration Technologies Corp.
Inventor： Martin S. McCormick
IPC: H04B7/0426 , H04B7/06 , H04B7/185 , H04B17/318 , H04W16/28
CPC classification number: H04B7/043 , H04B7/0617 , H04B7/18513 , H04B17/318 , H04W16/28
Abstract: In an embodiment, a method includes determining a first beam pointing vector associated with an antenna assembly by searching for a satellite from a plurality of satellites. The method includes maintaining a communication link with the satellite by determining a plurality of beam pointing vectors that converge to a signal quality value. The method includes obtaining, from the satellite, satellite ephemeris information of the satellite and one or more of remaining satellites of the plurality of satellites. The method includes determining an estimated orientation of the antenna assembly based on one or more of the satellite ephemeris information and the plurality of beam pointing vector. The method includes determining a second beam pointing vector based on the estimated orientation, the satellite ephemeris information, and an approximate position information of the antenna assembly.
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公开(公告)号：US20230308338A1
公开(公告)日：2023-09-28
申请号：US18205958
申请日：2023-06-05
Applicant: Space Exploration Technologies Corp.
Inventor： Martin S. McCormick , Feipeng Wang
CPC classification number: H04L27/367 , H03F1/3247 , H04B1/04 , H04L27/368 , H03F1/3294 , H04B2001/0425 , H03F1/3258 , H03F2201/3233 , H04B2001/0433
Abstract: A wireless communications system includes a pre-distortion actuator configured to receive a carrier-modulated signal and convert the carrier-modulated signal into an output signal, the pre-distortion actuator comprising a behavioral model that models a transmit chain of the system including at least one amplifier and at least one antenna and predict an input-output relationship of the transmit chain of the system between an input to the transmit chain to an output of the transmit chain. The system includes a phased antenna array configured to transmit the output signal. The phased antenna array includes a plurality of antenna elements, each antenna element electrically coupled to a respective power amplifier. The pre-distortion actuator is configured to generate the output signal by applying a correction to the carrier-modulated input signal that cancels out nonlinearities The behavioral model is updated based on feedback from a receiver from a previous output signal transmitted to the receiver.
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公开(公告)号：US12244396B1
公开(公告)日：2025-03-04
申请号：US17186579
申请日：2021-02-26
Applicant: Space Exploration Technologies Corp.
Inventor： Martin S. McCormick , Torbjorn Larsson , Alazar Tamrat , Jeffrey C. Strait , Chen Chen , Philip J. Treigherman , Stephan O. Roche , Ronald Gottula
IPC: H04B7/185 , H04L5/00 , H04W72/0453
Abstract: A modem is configurable on a satellite, user terminal or gateway generates a radio frequency (RF) signal using an orthogonal frequency division multiplexing (OFDM) protocol including a radio frame including one or more bursts. A burst of the one or more bursts includes a first portion including burst detection data, a second portion including channel characteristic estimation data, a third portion including payload data, and fourth and fifth portions including pilot data. The first portion in a time domain is included in the burst prior to the second, third, fourth, and fifth portions. The first portion can include a pseudo-random noise sequence inserted in the time domain. The same physical modem can be configured to transmit signals on an uplink or downlink between a user terminal and a satellite or on the uplink or downlink between the satellite and the gateway.
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