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公开(公告)号：US12183988B2
公开(公告)日：2024-12-31
申请号：US18505622
申请日：2023-11-09
Applicant: Space Exploration Technologies Corp.
Inventor： Masoud Kahrizi , Alex Ahmad Mirzaei , Ali Sajjadi , Bagher Afshar , Babak Vakili-Amini , Alireza Mehrnia , Behzad Nourani , Bernd Pregardier
Abstract: In an embodiment, an apparatus includes a first digital beamformer (DBF) associated with a first subset of antennas of a phased array antenna, the first DBF including a transmit section associated with transmission of a first signal at a first frequency in a transmit mode and a receive section associated with receiving of a second signal at a second frequency in a receive mode, the second frequency being different from the first frequency. The apparatus includes a second DBF associated with a second subset of antennas of the phased array antenna. The first and second DBFs are configured to receive a local oscillator signal having the first frequency from a common local oscillator in the transmit mode and receive the local oscillator signal having the second frequency from the common local oscillator in the receive mode.
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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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公开(公告)号：US12177009B1
公开(公告)日：2024-12-24
申请号：US17339807
申请日：2021-06-04
Applicant: Space Exploration Technologies Corp.
Inventor： Jeffrey A. Gardner , Yashodhan Dandekar , Ramakrishna Akella , Khasim Shaheed Shaik Mahammad
Abstract: Systems, methods, and techniques are provided for a radio link control (RLC) sublayer. An example satellite or user terminal can include a divisional of layer 2 of the OSI protocol layer structure. An example method includes providing a RLC sublayer on top of a MAC sublayer and adaptively switching, via the RLC sublayer and based on external data, between an unacknowledged mode and an acknowledged mode for the electronic communications. If the RLC sublayer is operating in the unacknowledged mode, the RLC sublayer provides one or more of (1) fragmentation and reassembly of service data units; (2) a use of RLC headers; and/or (3) no delivery guarantees. If the RLC sublayer is operating in the acknowledged mode, the RLC sublayer provides reliability in a sequence delivery service and one or more of (1) fragmentation and reassembly of service data units; and/or (2) the use of RLC headers.
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公开(公告)号：US20240388319A1
公开(公告)日：2024-11-21
申请号：US18665028
申请日：2024-05-15
Applicant: Space Exploration Technologies Corp.
Inventor： Masoud Kahrizi , Ali Sajjadi , Edward Yeuan , Alex Ahmad Mirzaei , Nooshin Vakilian , Eric Pepin
Abstract: Systems and techniques for distributing reference signals are disclosed. For example, a method includes generating, by a first phase-locked loop (PLL) included in a first beamformer (BF) chip, a first local oscillator (LO) signal; generating, by a second PLL included in a second BF chip, a second LO signal; and in a first BF configuration, transmitting radio frequency (RF) signals by a plurality of antenna elements based on the first LO signal. A first subset of the plurality of the antenna elements is associated with the first BF chip and a second subset of the plurality of antenna elements is associated with the second BF chip. The method includes, in a second BF configuration, receiving RF signals by the first subset of the plurality of antenna elements and the second subset of the plurality of antenna elements based on the second LO signal.
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公开(公告)号：US12148998B2
公开(公告)日：2024-11-19
申请号：US17993606
申请日：2022-11-23
Applicant: Space Exploration Technologies Corp.
Inventor： Trevor Cameron , Javier Rodriguez De Luis , Nil Apaydin
Abstract: In some embodiments, a phased array antenna system includes a carrier having a first side and a second side opposite the first side; a first antenna element and a second antenna element coupled to the first side of the carrier, the second antenna element spaced apart from the first antenna element by a space and a signal conditioning module including a support structure having a first side and a second side opposite the first side, one or more signal conditioning elements coupled to the first side of the support structure, and a plurality of coupling elements coupled to the second side of the support structure, wherein at least one of the plurality of coupling elements electrically couples the signal conditioning module to the first antenna element; and at least another of the plurality of coupling elements electrically couples the signal conditioning module to the carrier.
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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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49.发明授权公开(公告)号：US11943042B2
公开(公告)日：2024-03-26
申请号：US17499421
申请日：2021-10-12
Applicant: Space Exploration Technologies Corp.
Inventor： Thomas Laurance Robinson , Calder Christiansen Foster Coalson , Jared Michael Greene , Steven Douglas Gregory , Elliott Macdonald Schwartz , Aidan Bauer
IPC: H04B7/185
CPC classification number: H04B7/18513 , H04B7/18517 , H04B7/18558
Abstract: In one embodiment of the present disclosure, a device for detecting a zone of communication between a user terminal and a satellite constellation including a plurality of satellites in non-geosynchronous (non-GEO) orbit includes one or more processors and memory. The memory stores instructions that, as a result of being executed by the one or more processors, cause the device to: determine a location of the device, wherein the location corresponds to a field of regard for detecting the zone of communication, and wherein the field of regard corresponds to an antenna aperture of the phased array antenna; evaluate a level of communication between the phased array antenna and the satellite constellation associated with the field of regard; and output, to a user of the device, an indication of the level of communication between the phased array antenna and the satellite constellation associated with the field of regard.
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公开(公告)号：US20240064795A1
公开(公告)日：2024-02-22
申请号：US18240913
申请日：2023-08-31
Applicant: Space Exploration Technologies Corp.
Inventor： Jayasuryan V. Iyer , Khasim Shaheed Shaik Mahammad , Yashodhan Dandekar , Ramakrishna Akella , Chen Chen , Phillip E. Barber , Peter J. Worters
IPC: H04W72/543 , H04W72/1268 , H04W72/23
CPC classification number: H04W72/543 , H04W72/1268 , H04W72/23 , H04L1/0009
Abstract: A method of operating an uplink scheduler as part of a medium access control scheduler on a satellite includes selecting, from a plurality of user terminals, a first number of zero-bandwidth request user terminals from the plurality of user terminals, selecting, from the plurality of user terminals, a second number of non-zero-bandwidth request user terminals from the plurality of user terminals, binning the second number of non-zero-bandwidth request user terminals into a plurality of bins based on a respective bandwidth requirement for each non-zero-bandwidth request user terminal and based on a minimum user terminal grant and allocating, according to a grant allocation algorithm, a respective grant of radio resources in an uplink frame to each user terminal of the plurality of user terminals into a respective bin of the plurality of bins in an order associated with increasing bandwidth needs. A downlink scheduler is also disclosed.
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