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公开(公告)号：US12132517B2
公开(公告)日：2024-10-29
申请号：US17767828
申请日：2020-10-09
IPC分类号： H04B10/11 , H04B10/112
CPC分类号： H04B10/1123
摘要： A method and system for maintaining an optimized point ahead angle (Θa) between an uplink beam (U0) from a first terminal (10) to a second terminal (20), and a downlink beam (D0) from the second terminal (20) to the first terminal (10). While transmitting data via a transmission channel (Tx) from the first terminal (10) to the second terminal (20), a directional variation (ΔΘ) is applied to an initial point ahead angle (Θ0) for emitting the uplink beam (U1,U2) along different point ahead angles (Θ1,Θ2). A respective intensity (I1,I2) is determined of a part of the uplink beam (U1,U2), received by the second terminal (20), emitted by the first terminal (10) along a respective point ahead angle (Θ1, Θ2). The initial point ahead angle (Θ0) is adjusted towards an optimized point ahead angle (Θa) based on the respective intensity (I1,I2) as function of the different point ahead angles (Θ1,Θ2).
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公开(公告)号：US20240223277A1
公开(公告)日：2024-07-04
申请号：US18583825
申请日：2024-02-21
申请人： Attochron, LLC
IPC分类号： H04B10/112
CPC分类号： H04B10/1123 , H04B10/1129
摘要： In some embodiments, an optical communication system may include an optical source, a modulator, and a photoreceiver. The optical source may be configured to generate a beam comprising a series of light pulses each having a duration of less than 100 picoseconds. The photoreceiver may have a detection window duration of less than 1 nanosecond. When a first pulse travels through a variably refractive medium, photons in the first pulse may be refracted to travel along different ray paths to arrive at the photoreceiver according to a temporal distribution curve. A full width at half maximum (FWHM) value of the temporal distribution curve may be at least three times as large as a coherence time value of the first pulse, and the detection window of the photoreceiver may be at least six times as large as the FWHM value of the temporal distribution curve.
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公开(公告)号：US11929782B2
公开(公告)日：2024-03-12
申请号：US17440965
申请日：2020-03-09
发明人： Umberto Spagnolini , Monica Barbara Nicoli , Mattia Brambilla , Sergio Matteo Savaresi , Giulio Panzani
IPC分类号： H04B10/112 , H04W4/02 , H04W4/46
CPC分类号： H04B10/1123 , H04W4/026 , H04W4/46
摘要： A method for transmitting electromagnetic signals by a vehicle moving towards a target device including a communication system provided with a radiating system that receives and transmits electromagnetic signals, performs an alignment step with the target device to establish a first communication direction with the target device, communicates with the target device by orienting the radiating system to receive and transmit data along the first communication direction, and performs a subsequent phase for maintaining the alignment with the target device to determine a future position and an orientation of the radiating system with a sensor being operatively connected to an electronic control unit of the vehicle configured to implement control and/or driving assistance functions of the vehicle based on information received from the sensor, and ultimately orientates the electromagnetic signals emitted by the radiating system on the basis of the determined direction of communication.
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公开(公告)号：US20240014899A1
公开(公告)日：2024-01-11
申请号：US18218740
申请日：2023-07-06
申请人： NEC Corporation
发明人： Koya TAKATA , Hisashi MIZUMOTO , Fujio OKUMURA
IPC分类号： H04B10/112
CPC分类号： H04B10/1123
摘要： A transmitter that includes a light source that includes a plurality of emitters, a spatial light modulator that includes a modulation part in which a plurality of modulation regions associated with each of a plurality of the emitters is set, curved mirrors that have a curved reflecting surface having a curvature relevant to a projection angle of projection light transmitted as a spatial light signal and disposed in association with each of a plurality of the modulation regions in such a way that, on the reflecting surface, modulated light modulated in each of a plurality of the modulation regions set in the modulation part of the spatial light modulator is reflected, and a light shielding band that is disposed between the spatial light modulator and the curved mirrors and removes an unnecessary light component included in the modulated light modulated in each of a plurality of the modulation regions.
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公开(公告)号：US20230421258A1
公开(公告)日：2023-12-28
申请号：US18037492
申请日：2021-11-30
发明人： Alok Grover
IPC分类号： H04B10/112
CPC分类号： H04B10/1123
摘要： An optical communication system is provided that includes a first node and a second node. Each node of the first node and the second node includes transmit optics, receive optics. Each node also includes an optical transceiver module configured to provide optical signals to the transmit optics over a first optical conduit, and receive optical signals from the receive optics over a second optical conduit that has a core diameter larger than the first optical conduit. The transmit optics of the first node is configured to transmit first optical signals in free space for receipt by the receive optics of the second node, and the transmit optics of the second node is configured to transmit the second optical signals in free space for receipt by the receive optics of the first node.
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公开(公告)号：US11855690B2
公开(公告)日：2023-12-26
申请号：US17536405
申请日：2021-11-29
发明人： Winston Allen Saunders , Christian L. Belady , Lisa Ru-Feng Hsu , Hitesh Ballani , Paolo Costa , Douglas Carmean
IPC分类号： H04B10/112 , H04B10/40 , H04B10/516 , H04B10/66
CPC分类号： H04B10/1123 , H04B10/40 , H04B10/516 , H04B10/66
摘要： A system for using free-space optics to interconnect a plurality of computing nodes can include a plurality of optical transceivers that facilitate free-space optical communications among the plurality of computing nodes. The system may ensure a line of sight between the plurality of computing nodes and the optical transceivers to facilitate the free-space optical communications. The line of sight may be preserved by the position or placement of the computing nodes in the system. The position or placement of the computing nodes may be achieved by using different shaped enclosures for holding the computing nodes.
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公开(公告)号：US11817943B2
公开(公告)日：2023-11-14
申请号：US18164879
申请日：2023-02-06
申请人： X Development LLC
IPC分类号： H04J14/02 , H04B10/079 , H04B10/112
CPC分类号： H04J14/0221 , H04B10/07955 , H04B10/1123
摘要： The technology employs a state-based power control loop (PCL) architecture to maintain tracking and communication signal-to-noise ratios at suitable levels for optimal tracking performance and data throughput in a free-space optical communication system. Power for a link is adjustable to stay within a functional range of receiving sensors in order to provide continuous service to users. This avoids oversaturation and possible damage to the equipment. The approach can include decreasing or increasing the power to counteract a surge or drop while maintaining a near constant received power at a remote communication device. The system may receive power adjustment feedback from another communication terminal and perform state-based power control according to the received feedback. This can include re-initializing and reacquiring a link with the other communication terminal automatically after loss of power, without human intervention. There may be a default state and discrete states including rain, fade, surge and unstable states.
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公开(公告)号：US11757529B1
公开(公告)日：2023-09-12
申请号：US18164947
申请日：2023-02-06
申请人： Attochron, LLC
IPC分类号： H04B10/112
CPC分类号： H04B10/1123 , H04B10/1129
摘要： In some embodiments, an optical communication system may include an optical source, a modulator, and a photoreceiver. The optical source may be configured to generate a beam comprising a series of light pulses. The photoreceiver may have a detection window duration of 1 nanosecond or less. When a first pulse travels through a variably refractive medium, photons in the first pulse may be refracted to travel along different ray paths to arrive at the photoreceiver according to a temporal distribution curve. A full width at half maximum (FWHM) value of the temporal distribution curve may be greater than a coherence time value of the first pulse, and the detection window of the photoreceiver may be greater than the FWHM value of the temporal distribution curve.
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公开(公告)号：US11658743B2
公开(公告)日：2023-05-23
申请号：US17597113
申请日：2019-06-28
申请人： LG ELECTRONICS INC.
发明人： Hojae Lee , Sangrim Lee , Byounghoon Kim
IPC分类号： H04B10/00 , H04B10/112 , H04B10/2507
CPC分类号： H04B10/1123 , H04B10/2507
摘要： A method of receiving, by a receiving terminal, a signal in optical wireless communication is proposed. The method may comprise: establishing a communication link for performing the optical wireless communication with a transmitting terminal; receiving an optical signal from the transmitting terminal through the communication link; and performing interference cancelation on the optical signal. Here, establishing the communication link comprises transmitting and receiving initial information with the transmitting terminal, wherein the initial information may include an orbital angular momentum (OAM) mode applied to the optical signal. In addition, the interference cancelation may be performed on the basis of the OAM mode.
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公开(公告)号：US20190253142A1
公开(公告)日：2019-08-15
申请号：US16309332
申请日：2017-06-13
申请人： BAE SYSTEMS plc
IPC分类号： H04B10/112 , G02B26/12 , H04B10/80
CPC分类号： H04B10/1123 , G02B26/127 , H04B10/112 , H04B10/80 , H04B13/02
摘要： Apparatus for and method of transmitting an optical signal by a Free Space Optical, FSO, communication system, the method comprising: transmitting, by an optical signal transmitter (104), an optical signal (700) into at least part of a volume of an optical medium (302); and controlling, by a controller, the optical signal transmitter (104), to scan the at least part of the volume (302) using the optical signal (700) in a sequence of non-overlapping loops (704, 708). The sequence of non-overlapping loops (704, 708) may be a sequence of non-overlapping, concentric circular loops.
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