公开(公告)号：US20240267128A1

公开(公告)日：2024-08-08

申请号：US18566604

申请日：2022-06-02

Applicant: SPECTRONITE

Inventor： Jean-Philippe FOURNIER

IPC: H04B10/516 ,  H04L27/36

CPC classification number: H04B10/5161 ,  H04L27/364 ,  H04B2210/006

Abstract: The invention relates to a data transmission method, comprising the steps of: generating from a data stream to be transmitted, a plurality of frequency-domain digital sample streams, each digital sample stream modulating a respective subcarrier defining a respective subcarrier channel, converting the frequency-domain sample streams into temporal sample streams, by an inverse spectral transform, combining the temporal sample streams into a composite stream, frequency-shifting the composite stream using a digital oscillator at an intermediate frequency above 1 GHz, converting the shifted composite stream into an analog signal, frequency-shifting the analog signal to a carrier frequency above 2 GHz using an analog oscillator at a carrier frequency, filtering the analog signal to attenuate the carrier frequency, and transmitting the filtered signal via an antenna.

公开(公告)号：US12052058B2

公开(公告)日：2024-07-30

申请号：US17075372

申请日：2020-10-20

Applicant: Intel Corporation

Inventor： Alexander Krichevsky ,  Boping Xie

IPC: H04B10/40 ,  H04B10/079 ,  H04B10/516

CPC classification number: H04B10/40 ,  H04B10/0795 ,  H04B10/5161

Abstract: Embodiments of the present disclosure are directed to an optical transceiver within a single device. The optical transceiver incorporates an optical isolator, thus eliminating the need for an external isolator unit. In embodiments, transmitter channels and receiver channels share a single lens array and incorporate a compensator block to equalize the transmitter and receiver optical signals in the transceiver. Other embodiments may be described and/or claimed.

公开(公告)号：US20240223279A1

公开(公告)日：2024-07-04

申请号：US18602857

申请日：2024-03-12

Applicant: eSTS, Inc.

Inventor： Dennis L. Gette ,  Thomas J. McAvoy

IPC: H04B10/112 ,  H04B10/50 ,  H04B10/516

CPC classification number: H04B10/1129 ,  H04B10/1125 ,  H04B10/502 ,  H04B10/5161

Abstract: An invisible light communication system can communicate using infrared or ultraviolet light signals to provide more secure communications. The system includes a software definable and hardware configurable transmitter that uses an input, an encoder, an invisible light source, and an optic to transmit an invisible light signal. The system also includes a software definable and hardware configurable receiver that receives the invisible light signal using an optic, a detector, a detector, and an output. Applications for the invisible light communication system include fixed, deployable, vehicle, and wearable configurations for voice, video and data transmission and receipt in support of a variety of use cases: remote sensing; data exfiltration; remote control, ordnance detonation; tactical chat/messaging; point-to-point and point-to-multipoint audio communications; and full motion video.

公开(公告)号：US20240187102A1

公开(公告)日：2024-06-06

申请号：US18073438

申请日：2022-12-01

Applicant: Cisco Technology, Inc.

Inventor： Brian P. WELCH ,  Subal SAHNI

IPC: H04B10/516

CPC classification number: H04B10/5161

Abstract: An optical system includes a first optical source, a second optical source, a first optical modulator, and a second optical modulator. The first optical modulator includes a first input and a first output. The second optical modulator includes a second input, a third input, a second output, and a third output. During a first mode, the first optical source emits a first optical signal to the first input and the second input, the first optical modulator produces a first modulated optical signal at the first output, and the second optical modulator produces a second modulated optical signal at the second output. During a second mode, the second optical source emits a second optical signal to the third input and the second optical modulator produces a third modulated optical signal at the third output.

公开(公告)号：US20240187094A1

公开(公告)日：2024-06-06

申请号：US18285496

申请日：2021-04-05

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Naotaka SHIBATA ,  Takeshi IMAI ,  Rintaro HARADA ,  Shin KANEKO

IPC: H04B10/112 ,  H04B10/516 ,  H04L1/00

CPC classification number: H04B10/112 ,  H04B10/5161 ,  H04L1/0061

Abstract: A beam transmission device transmits a directional beam toward a beam reception device in a wireless communication system. The main signal generation unit generates a main signal. A control signal generation unit periodically generates a control signal related to maintaining communication with the beam reception device. A signal multiplexing unit multiplexes the main signal and the control signal. A divergence angle adjustment unit sets a target divergence angle to a first divergence angle in a period in which the control signal is not included in the multiplexed signal, and sets the target divergence angle to a second divergence angle larger than the first divergence angle in a period in which the control signal is included in the multiplexed signal. A beam control unit changes a divergence angle of the beam modulated by the multiplexed signal to the target divergence angle.

公开(公告)号：US20240162991A1

公开(公告)日：2024-05-16

申请号：US18281773

申请日：2021-04-01

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Ryo MIYATAKE ,  Yoichi FUKADA ,  Toshiaki SHITABA ,  Akihiro TANABE ,  Tomoaki YOSHIDA

IPC: H04B10/516 ,  H04B10/50 ,  H04J14/00

CPC classification number: H04B10/5161 ,  H04B10/503 ,  H04J14/00

Abstract: An optical transmission device includes: a first optical phase modulator that outputs a first optical signal by phase-modulating the laser beam having a first oscillation frequency according to the first electric signal in a case where the first electric signal is output to the first transmission path, a second optical phase modulator that outputs a laser beam having a second oscillation frequency as the second optical signal in a case where the first electric signal is output to the first transmission path; an optical multiplexer/distributor that outputs a third optical signal and a fourth optical signal by multiplexing the first optical signal and the second optical signal and distributing a result of the multiplexing; a first detection unit that converts the third optical signal into a first heterodyne detection signal; a second detection unit that converts the fourth optical signal into a second heterodyne detection signal; and a first optical intensity modulator that intensity-modulates a laser beam having a third oscillation frequency according to one of the first heterodyne detection signal and the second heterodyne detection signal.

公开(公告)号：US20240007186A1

公开(公告)日：2024-01-04

申请号：US18267731

申请日：2022-01-20

Applicant: UNIVERSITY OF SOUTHERN CALIFORNIA

Inventor： Runzhou Zhang ,  Nanzhe Hu ,  Alan E. Willner ,  Huibin Zhou ,  Haoqian Song ,  Hao Song ,  Xinzhou Su ,  Kaiheng Zou

IPC: H04B10/112 ,  H04B10/61 ,  H04B10/516

CPC classification number: H04B10/1121 ,  H04B10/615 ,  H04B10/5161

Abstract: Atmospheric turbulence degrades decoding and data recovery from optically transmitted signals. For example, atmospheric turbulence can induce power coupling from the transmitted Gaussian mode to higher-order modes, resulting in significantly degraded mixing efficiency and system performance. Systems and methods are provided to generate a signal that is a conjugate of the atmospheric noise which is combined with a received data signal to ameliorate atmospheric noise. An optical pilot beam may be transmitted with an optical data beam and received by a receiver which utilizes the optical pilot beam to generate the signal that is a conjugate of the atmospheric noise.

公开(公告)号：US11863236B2

公开(公告)日：2024-01-02

申请号：US17977224

申请日：2022-10-31

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Yutaka Murakami ,  Nobuhiko Hashida ,  Ryutaro Monden

IPC: H04B10/11 ,  H04B10/54 ,  H04B10/116 ,  H04B10/508 ,  H04B10/516

CPC classification number: H04B10/541 ,  H04B10/116 ,  H04B10/508 ,  H04B10/11 ,  H04B10/516 ,  H04B10/5161

Abstract: A transmission method includes: in a first period, causing a light source to emit light having a first luminance; and in a second period, causing the light source to transmit an optical signal by causing the light source to alternately emit light having a second luminance and light having a third luminance lower than the second luminance.

公开(公告)号：US11848708B2

公开(公告)日：2023-12-19

申请号：US17630825

申请日：2020-09-07

Applicant: SOOCHOW UNIVERSITY

Inventor： Xiaodi You ,  Gangxiang Shen

IPC: H04B10/114 ,  H04B10/516 ,  H04B10/079 ,  H04W24/02 ,  H04W64/00

CPC classification number: H04B10/5161 ,  H04B10/07953 ,  H04W24/02 ,  H04W64/003

Abstract: The present invention discloses a capacity optimization method for a mobile optical wireless communication system and a communication method and system. The capacity optimization method includes the following steps: establishing a mobile channel impulse response model; calculating an electrical signal-to-noise ratio (SNR) of an output of a receiver; calculating bit error rate (BER) values of an optical wireless communication system in different candidate modulation formats according to the electrical SNR of the output of the receiver; selecting a first modulation format and a second modulation format from the different candidate modulation formats; determining quantities of chips in the first modulation format and the second modulation format in each data frame; and building a time domain hybrid modulation frame according to the quantities of chips in the first modulation format and the second modulation format, modulating data by using the time domain hybrid modulation frame, and performing data transmission.

公开(公告)号：US11818521B2

公开(公告)日：2023-11-14

申请号：US17300393

申请日：2021-06-15

Applicant: Mohammad A. Mazed

Inventor： Mohammad A. Mazed

IPC: H04B10/27 ,  H04Q11/00 ,  H04B10/272 ,  H04J14/02 ,  H01S3/101 ,  H04B10/516 ,  H01S5/026 ,  H01S5/0625

CPC classification number: H04Q11/0067 ,  H01S3/101 ,  H04B10/272 ,  H04B10/5161 ,  H04J14/0223 ,  H04J14/0256 ,  H04J14/0282 ,  H04Q11/0005 ,  H01S5/0265 ,  H01S5/06256 ,  H01S5/06258 ,  H04Q2011/0016 ,  H04Q2011/0032 ,  H04Q2011/0064

Abstract: An intelligent subsystem is disclosed that comprises a system-on-a-chip (SoC)/microprocessor, a radio transceiver and a microphone/voice processing module (which includes one or more electronic components), wherein the, intelligent subsystem is communicatively interfaced with a first set of computer implementable instructions in natural language, a second set of computer implementable instructions in artificial intelligence and a third set of computer implementable instructions to provide a search on an internet based on a user's interest/preference, wherein the first set of computer implementable instructions, the second set of computer implementable instructions and the third set of computer implementable instructions are stored in one or more cloud-based non-transitory storage media.