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59 results about "Optical wireless communications" patented technology
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Optical wireless communications (OWC) is a form of optical communication in which unguided visible, infrared (IR), or ultraviolet (UV) light is used to carry a signal. OWC systems operating in the visible band (390–750 nm) are commonly referred to as visible light communication (VLC). VLC systems take advantage of light emitting diodes (LEDs) which can be pulsed at very high speeds without noticeable effect on the lighting output and human eye. VLC can be possibly used in a wide range of applications including wireless local area networks, wireless personal area networks and vehicular networks among others. On the other hand, terrestrial point-to-point OWC systems, also known as the free space optical (FSO) systems, operate at the near IR frequencies (750–1600 nm). These systems typically use laser transmitters and offer a cost-effective protocol-transparent link with high data rates, i.e., 10 Gbit/s per wavelength, and provide a potential solution for the backhaul bottleneck. There has also been a growing interest on ultraviolet communication (UVC) as a result of recent progress in solid state optical sources/detectors operating within solar-blind UV spectrum (200–280 nm). In this so-called deep UV band, solar radiation is negligible at the ground level and this makes possible the design of photon-counting detectors with wide field-of-view receivers that increase the received energy with little additional background noise. Such designs are particularly useful for outdoor non-line-of-sight configurations to support low power short-range UVC such as in wireless sensor and ad-hoc networks.
Optical frontend for use in optical wireless communication
ActiveUS12627375B2Line-of-sight transmissionClose-range type systemsPhotovoltaic detectorsPhotodetector
The invention relates to an Optical Front-end, OFE, (400) for Optical Wireless Communication, OWC, the OFE comprising: an optical receiver with at least a photodetector (102a) and a trans-impedance amplifier, and a two-dimensional array of optical transmitters (103a) each having an individual transmitter field-of-view, and one or more drivers, the two-dimensional array arranged to create a combined transmitter field of view that is larger than 5 the individual transmitter field of view, the plurality of optical transmitters arranged such that optical axes of the plurality of optical transmitters are evenly distributed within the combined transmitter field of view.
Owner:SIGNIFY HOLDING BV
Optical Wireless Communication Apparatus and Method
PendingUS20260058727A1Close-range type systemsElectromagnetic transmission optical aspectsData signalLight signal
An optical wireless communication (OWC) interface apparatus comprises: at least one input and / or output configured to transfer data signals from and / or to a bus device; optical interface circuitry configured to transfer optical wireless communication (OWC) signals representative of the data signals between the OWC interface apparatus and a light transmitter and / or receiver apparatus, wherein the light transmitter and / or receiver apparatus is configured to transmit and / or receive the OWC signals as free-space light signals; and interface control circuitry that is configured to establish and / or maintain communication with the bus device in accordance with a bus protocol thereby to enable transfer of the data signals between the OWC interface apparatus and the bus device.
Owner:PURELIFI
Interference mitigation
An optical wireless communication OWC network (100) includes multiple access points (120) for communicating with multiple endpoint devices (110) via modulated light. A control system (13) receives a report of an indicated time slot during which a first access point (120a) detects an event indicating interference and transmits the indication of the time slot to at least one other access point (120b). The other access points (120b) provide the control system (13) with identifiers of any registered endpoint devices that have used or are using the time slot. If the control system (13) receives the identifier of a single endpoint device from the other access points (120b), it identifies that endpoint device as the cause of the interference experienced at the first access point (120a). If the control system (13) receives the identifiers of multiple endpoint devices from the other access points (120), it causes the endpoint devices in the OWC network (100) to announce their presence.
Owner:SIGNIFY HOLDING BV
Anti-jamming pulse laser frequency division multiplexing optical coding wireless communication system and method
The application discloses an anti-interference pulse laser frequency division multiplexing optical coding wireless communication system and method, provides an optical wireless communication system based on pulse laser, and realizes an anti-interference pulse laser frequency division multiplexing optical coding communication method. Relying on the convergence effect of the light collector, a stable and anti-interference system receiving end is realized, the anti-interference capability of the whole system is realized through a pulse laser source and a multi-channel light splitting module, the utilization rate of the spectrum in the system communication process is improved, and the pulse laser transmission of frequency division multiplexing is realized.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI +1
A multi-agent deep Q network optimization indoor VLC-RF resource energy efficiency allocation method
The present application relates to a kind of multi-agent deep Q network optimization indoor VLC-RF resource energy efficiency allocation method, belong to optical wireless communication technical field.The present application is to improve the system energy efficiency of VLC-RF heterogeneous network, user is abstracted as the agent of deep Q network, user selects the action of VLC-RF access point, power distribution and subcarrier resource allocation is abstracted as the action of agent, the product of the proportional fair satisfaction degree value that considers user to the communication rate alliance satisfaction or to the channel reliability alliance satisfaction and system energy consumption profit value is designed as the reward Q value of deep Q network, using a variable greed factor control agent's alliance conversion, obtains the access AP channel state of user side emphasis;Then, using deep Q network selects the action of maximum Q value for user, optimizes multiple user association access point in VLC-RF system, access point transmission power and subcarrier resource allocation.The proposed method can improve the system energy efficiency of VLC-RF while increasing user satisfaction.
Owner:CHONGQING UNIV OF POSTS & TELECOMM
Underwater mobile body system
PCT designated stageWO2026075111A1Vehicle position/course/altitude controlUnderwater vesselsMarine engineeringOptical communication
An underwater mobile body system according to one aspect of the present disclosure comprises a first underwater mobile body and a second underwater mobile body, calculates the direction of the second underwater mobile body as viewed from the first underwater mobile body based on the position of the first underwater mobile body and the position of the second underwater mobile body, directs a first optical communication device toward the second underwater mobile body, calculates the direction of the first underwater mobile body as viewed from the second underwater mobile body based on the position of the second underwater mobile body and the position of the first underwater mobile body, and directs a second optical wireless communication device toward the first underwater mobile body.
Owner:KAWASAKI JUKOGYO KK
Electronic device
PendingUS20260090467A1Semiconductor/solid-state device detailsSolid-state devicesProcessing elementEmbedded system
An electronic device is provided. The electronic device includes a plurality of first processing units and a first transmission module. The first processing units are disposed in a data processing center. The first transmission module is configured to adjust an optical transmission direction to communicate one of the first processing units with a second processing unit through optical wireless communication.
Owner:ADVANCED SEMICON ENG INC
Pilot optical offset compensation method in optical wireless communication systems
An optical receiver (300) comprising: a photodetector (310) configured to detect a data beam transmitted by an optical transmitter (200); and at least two pilot light sources (321, 322) configured to emit pilot light to assist a beam alignment procedure performed by the optical transmitter (200), wherein the at least two pilot light sources are located on different sides of the photodetector (310); and a controller (330) configured to determine an individual pilot light intensity for each of the pilot light sources based on the received beam intensity of the data beam detected by the photodetector (310), and to control each of the pilot light sources to emit pilot light according to the determined corresponding individual pilot light intensity such that the centroid of the combination of pilot light intensities of the pilot light sources (321, 322) provides an indication to the optical transmitter (200) about the desired direction of movement of the data beam.
Owner:SIGNIFY HOLDING BV
Correction device and communication device
In optical wireless communication, this technology enables high-speed correction of the communication laser beam. [Solution] The correction device (100) comprises a plurality of driveable mirrors (M101, M102, ...) arranged on the optical path of the communication laser light, a detection unit (120) that detects the communication laser light reflected by the plurality of driveable mirrors, and a drive unit (130) that drives each of the plurality of driveable mirrors according to the detection result of the detection unit, and drives the first driveable mirror and the second driveable mirror among the plurality of driveable mirrors at different timings.
Owner:SOFTBANK CORPORATION
Radio over fiber communication system based on I / Q frequency mixing and electro-optical modulation
PendingCN121530479ARadio-over-fibreElectromagnetic receiversDigital signal processingIntermediate frequency
The invention belongs to the technical field of wireless communication, and particularly relates to a radio-over-fiber communication system based on I / Q frequency mixing and electro-optical modulation. The method specifically comprises the following steps: data passes through a digital-to-analog conversion module and an I / Q mixer to generate a radio frequency signal, and the radio frequency signal is transmitted by a transmitting end; a receiving end receives a radio frequency signal, and the radio frequency signal is down-converted into two paths of mutually orthogonal intermediate frequency I and Q signals to an electro-optical modulation and optical fiber link after passing through an I / Q mixer; the two paths of I and Q signals are respectively sent to an I / Q optical modulator and are used for driving the I / Q optical modulator, generating optical signals, mapping the optical signals to optical carriers, and sending the optical signals to a coherent receiver; the coherent receiver performs coherent receiving on the optical signal to generate a baseband signal, and the baseband signal is subjected to analog-to-digital conversion through the digital signal processing module; the device is suitable for microwave, millimeter wave, terahertz and satellite-ground communication scenes such as satellite-ground long-distance communication, deep space exploration and secret signal receiving, supports various high-order modulation formats, and has the advantages of high capacity, high sensitivity and high safety.
Owner:FUDAN UNIVERSITY
Optical wireless communication beam steering with assistance information
Certain aspects of the present disclosure provide a method for wireless communication at a first node, the method generally comprising: obtaining assistance information using at least one optical sensor; and participating in optical wireless communication (OWC) with the second node using beam steering based on the assistance information.
Owner:QUALCOMM INC
Sectorizatiion technique for high-speed optical wireless communication
An apparatus (100) for use in an optical wireless communication system comprises: a wide beam light source (L5): two or more narrow beam light sources (L1-L4) configured to emit in a different direction, wherein a combined field-of-view. FoV, of the narrow beam light sources (L1-L4) is covered by a FoV of the wide beam light source (L5); a plurality of switches (S1-S5) configured to turn on or off a corresponding one out of the 5 light sources (L1-L5) individually; a receiver (RX) configured to receive one or more feedback signals from a remote device (200); and a controller (CTR) configured to control the plurality of switches (S1-S5) via a control signal; update the control signal based on the one or more feedback signals received by the receiver (RX): carry out a beam selection procedure by sending test signals via the wide beam light source (L5) and one or more 10 narrow beam light sources (L1-L4) to the remote device (200) to enable a selection of one out of the narrow beam light sources (L1-L4) for establishing data communication with the remote device (200).
Owner:SIGNIFY HOLDING BV
OPTICAL WIRELESS COMMUNICATION DEVICE, SYSTEM AND METHOD
Owner:PURELIFI
Optical system for optical wireless communication
The position sensing device is positioned separate from a focal plane on which a portion of the incident beam is focused. A position sensing signal generated by the position sensing device is used to steer the incident beam relative to the lens arrangement for focusing portions of the incident beam.
Owner:SIGNIFY HOLDING BV
A subsystem for optical wireless communication
PendingUS20260074789A1Line-of-sight transmissionClose-range type systemsCommunication interfaceTerminal equipment
A subsystem (100) for connecting an end device (200) to a first network (300) or a second network (400) via optical wireless communication; wherein the first network (300) and the second network (400) are of different security and / or priority levels, the subsystem (100) comprising: a first communication interface (110) configured to provide connection to the first network (300); a second communication interface (120) configured to provide connection to the second network (400); an optical front end, OFE (130), comprising a light source (131) configured to emit optical data to the end device (200) and a light detector (132) configured to receive optical data from the end device (200); a combiner (140), connected between the light source (131) and the first and the second communication interfaces, configured to combine analog signals received from both the first and the second communication interfaces and to provide to the light source (131) for transmission; and a splitter (150), connected between the light detector (132) and the first and the second communication interfaces, configured to split analog signals received from the light detector (132) and to provide to either the first communication interface (110) or the second communication interface (120).
Owner:SIGNIFY HOLDING BV
Vehicle Data Unloading System and Method
PendingCN122179002AParticular environment based servicesConnection managementTelecommunicationsWired communication
This invention relates to the field of space optical communication technology, specifically providing a vehicle data unloading system and method, aiming to solve the problem that existing wired communication and traditional wireless communication cannot simultaneously meet the high bandwidth requirements for rapid vehicle data unloading. To this end, the vehicle data unloading system of this invention includes a vehicle-end transmitting device, a fixed-end receiving device, and a supporting component. The vehicle-end transmitting device and the fixed-end receiving device establish a communication link via optical wireless communication signals. The vehicle-end transmitting device is mounted on the vehicle and can directionally transmit optical wireless communication signals carrying vehicle data. The supporting component supports the fixed-end receiving device and drives the fixed-end receiving device towards the transmission direction of the optical wireless communication signals. The fixed-end receiving device is configured to receive the optical wireless communication signals emitted by the vehicle-end transmitting device and controls the supporting component to orient the receiving unit towards the transmission direction of the optical wireless communication signals.
Owner:ZHEJIANG UNIV +1
An optical wireless communication system based on hollow core optical fiber
This application relates to an optical wireless communication system based on hollow-core optical fiber. The central station unit includes a radio frequency (RF) signal generation module, an electro-optic modulation module, and a hollow-core optical fiber adapter transmitter module. The RF signal generation module generates an RF signal; the electro-optic modulation module modulates the RF signal onto an optical carrier to form an optical signal; the hollow-core optical fiber adapter transmitter module couples the optical signal to the hollow-core optical fiber. The remote node unit includes a hollow-core optical fiber adapter receiver module, a photoelectric conversion module, an RF processing front-end module, and an antenna array. The hollow-core optical fiber adapter receiver module couples the optical signal from the hollow-core optical fiber to the photoelectric conversion module; the photoelectric conversion module converts the optical signal into an RF signal; the RF processing front-end module amplifies and filters the RF signal; and the antenna array outputs the RF signal. This application addresses the inherent bottlenecks of traditional optical wireless systems based on solid-core optical fibers in terms of end-to-end delay, transmission bandwidth, and signal nonlinearity impairments.
Owner:WUHAN POST & TELECOMM RES INST CO LTD
Socially aware indoor device cooperation blind spot access method for wireless optical communication
The present application relates to a kind of social awareness indoor equipment cooperation blind spot access wireless optical communication method, belong to optical wireless communication technical field.The method described in the present application is directed to the problem of inter-cell interference in indoor visible light communication, this method uses point coloring method to divide different frequency bands for adjacent visible light access point to suppress inter-cell interference, select multiple interference-free point coloring-based VLC device access for equipment;For the device trapped in the visible light coverage blind spot, design the access method of device cooperation based on social awareness, identify and exclude negative devices for cooperative communication by evaluating the social relationship between devices, select the positive device of D2D cooperative communication to establish relay link between blind spot device.At the same time, in order to improve the online time of cooperative D2D device, power allocation optimization method based on energy efficiency optimization is used.The method can effectively improve the success access rate of device, system throughput and information transmission energy efficiency of relay link between devices.
Owner:CHONGQING UNIV OF POSTS & TELECOMM
Energy efficient optical wireless communication module
An optical wireless communication module comprising a plurality of optical transceivers and a controller, wherein the controller is configured to determine the optical transceivers to be used based on movement information of a UE, to activate the optical transceivers to be used and to deactivate other optical transceivers, such that it consumes less energy without compromising Quality of Service.
Owner:SIGNIFY HOLDING BV
Display apparatus
PendingUS20260113118A1Batteries circuit arrangementsDigital data processing detailsComputer hardwareDisplay device
A display apparatus comprises an at least partially transparent display, the display configured to generate light to form an image for display to a user positioned in front of the display, and at least one of light-transmitting device or light-receiving device positioned behind the display, wherein the at least one of light-transmitting device or light-receiving device is configured to at least one of transmit or receive light through at least part of the display, wherein the at least one of light-transmitting device or light-receiving device comprises or forms part of an optical wireless communications (OWC) apparatus configured to at least one of transmit or receive the light through the at least part of the display.
Owner:PURELIFI
System for free space optical communication using active beam steering
Optical receiver (2) comprising a semitransparent retroreflector (1; 100; 101; 102; 103; 104) configured to assist in a retroreflector based beam alignment procedure for the optical receiver (2). A photodetector (12) of the receiver is placed behind the retroreflector. The semitransparent retroreflector (1; 101; 102) comprises a coating (5) applied to an optical component of the optical receiver (2), or the semitransparent retroreflector (100; 103; 104) comprises an optical material introduced by replacing at least a part of an original optical material of an optical component of the optical receiver (2). Optical wireless communication system comprising the optical receiver.
Owner:SIGNIFY HOLDING BV
Flexible backbone network for high-speed optical wireless communication
A backbone network (100) for use in an optical wireless communication system comprises one or more local switches (200) and one or more optical access points (300), APs, wherein local switches (200) are configured to provide to optical APs (300) connections to an external network. Each local switch (200) comprises a first type optical front end (210), OFE, having a rotatable orientation and a beam angle not larger than 60 degrees, and a second type OFE (230) having a 360-degree beam angle on the rotation plane of the first type OFE. Each optical AP comprises an OFE (310) having a rotatable orientation and a beam angle not larger than 60 degrees. The pairing and beam alignment between the first type OFE of a local switch and the OFE of an optical AP is achieved via the assist of the second type OFE of the local switch.
Owner:SIGNIFY HOLDING BV
Energy-autonomous optical wireless communication system
An optical wireless communication receiver (100 / 600) comprising: one or more harvesting solar cells (112) configured to convert light into electrical energy; one or more communication solar cells (122) configured to convert light into electrical signals with information embedded; a rechargeable battery (130) configured to store electrical energy generated by the one or more harvesting solar cells (112); a communication module (150) configured to decode the electrical signals generated by the one or more communication solar cells (122) and extract the information; a first switch (114) configured to connect the one or more harvesting solar cells (112) to the rechargeable battery (130) to achieve a first harvesting state, and to the communication module (150) to achieve a second communication state; a second switch (124) configured to connect the one or more communication solar cells (122) to the communication module (150) to achieve a first communication state, and to the rechargeable battery (130) to achieve a second harvesting state; and a microprocessor (140) configured to control the first switch (114) and the second switch (124).
Owner:KING ABDULLAH UNIV OF SCI & TECH
Wireless optical communication signal differential transmission device and coding and decoding method
This invention discloses a differential transmission device and encoding / decoding method for wireless optical communication signals, relating to the field of wireless optical communication technology. The invention achieves dual-dimensional multiplexing transmission of amplitude and phase by constructing orthogonal amplitude-phase modulated optical wireless communication data frames. The transmitting end uses dual light sources to drive the transmission of optical signals with phase difference, and the receiving end performs differential operations on the two photoelectric signals to suppress common-mode interference such as ambient light, achieving a common-mode rejection ratio of over 60dB. An adaptive phase depth mechanism dynamically adjusts the phase coding accuracy. Under strong ambient light conditions of 10000 lux, the signal-to-noise ratio is improved by 26dB compared to a single-channel solution; the maximum transmission distance is increased by 222% in outdoor scenarios of 5000 lux; and the effective data rate in high-speed digital mode reaches 320kbit / s. It is suitable for both short-distance high-speed indoor communication and long-distance low-interference outdoor transmission, exhibiting strong scenario compatibility.
Owner:NANJING VOCATIONAL UNIV OF IND TECH
Control device, program, and system
Provided is a control device including: a weather forecast data acquisition unit that acquires, for each of a plurality of wireless devices disposed on the ground, weather forecast data that forecasts a weather between a wireless device among the plurality of wireless devices and a wireless device among the plurality of wireless devices that is able to establish an optical wireless communication connection; a communication association information reception unit that receives, from each of the plurality of wireless devices, communication association information associated with a communication of the wireless device; a switching determination unit that determines whether to switch a connection destination of the optical wireless communication connection of the wireless device based on the weather forecast data between the wireless device and the wireless device among the plurality of wireless devices that establishes the optical wireless communication connection; and a connection destination selection unit that, in response to the switching determination unit determining to switch the connection destination of the optical wireless communication connection of the wireless device, selects the connection destination of the optical wireless communication connection of the wireless device based on the weather forecast data and the communication association information of each of the plurality of wireless devices.
Owner:SOFTBANK CORPORATION
Optical wireless communication apparatus
PendingUS20260066991A1Line-of-sight transmissionSatellite communication transmissionTelecommunicationsSignal light
A transmission optical system and a reception optical system of an optical wireless communication apparatus are independent of each other. Optical paths of a signal light from an antenna for both transmission and reception are parallel to each other. An integrated fast steering mirror (FSM) is arranged to span both of the optical paths.
Owner:TAMRON CO LTD
Synchronization in optical wireless networks for interference suppressing
ActiveUS12621053B2Synchronisation arrangementTime-division optical multiplex systemsComputer networkTelecommunications
In an optical wireless communication, OWC, network (100), time division multiple access, TDMA, is commonly used for interference suppression among multiple network devices (D1-Dn) associated to a single coordinator, or among adjacent coordinators (C1-Cn). However, an offset of MAC cycles among two adjacent coordinators (C1-C2) may still result in interference to a network device (D1) located in the overlapping area of the coverage areas of these two adjacent coordinators (C1-Cn). This invention is directed to various methods, apparatus, systems, computer program and computer-readable media for providing a mechanism to make use of an out-of-band channel to send a signal from a network device (D1) to the two adjacent coordinators (C1-C2), for assisting the alignment of MAC cycles among the two adjacent coordinators (C1-C2), and the out-of-band channel has a line-of-sight character, and is out-of-band as compared to the OWC network (100).
Owner:SIGNIFY HOLDING BV
Passive optical-to-RF conversion for secure eavesdropping on optical wireless communication systems
PCT designated stageWO2026089771A2Optical transmission for RF signal generation/processingClose-range type systemsTransceiverSoftware engineering
An example surveillance system includes an antenna configured to reflect an RF signal; a photodiode coupled to the antenna, where the photodiode is configured to receive an optical-wireless communication signal, and where the photodiode is configured to output a modulated backscattered RF signal by the antenna by switching the antenna between a low reflection state and a high reflection state; and a transceiver comprising: an RF transmitter configured to transmit the RF signal; and a receiver configured to receive the modulated backscattered RF signal, and where the modulated backscattered RF signal comprises a frame of optical-wireless communication data of the optical-wireless signal.
Owner:OHIO STATE INNOVATION FOUND