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205 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.
Power control method, circuit and system
The invention relates to the technical field of radio over fiber communication, in particular to a power control method, circuit and system. The control method comprises the following steps that a radio frequency link gain model is established, a truth table of the mapping relation between a target power value and the attenuation amount of the variable attenuator is pre-stored in a microcontroller, and the truth table comprises joint correction parameters of a temperature compensation coefficient alpha (T) and an environment attenuation factor beta (d). According to the power control method, circuit and system provided by the invention, accurate power control of B3 and N78 frequency band radio frequency amplification circuits is realized through cooperative work of a microcontroller unit and a variable attenuator.
Owner:TAICANG T&W ELECTRONICS CO LTD
Optical wireless communication system and optical wireless communication device
ActiveJP7642160B1Wavelength-division multiplex systemsSatellite communication transmissionMultiplexingOptical transmitter
In an optical wireless communication system equipped with a pair of optical wireless communication devices (1), the optical wireless communication device (1) is equipped with a plurality of optical transmitting units (101) that transmit optical signals of a target wavelength, an optical multiplexing / demultiplexing unit (103) that multiplexes the optical signals transmitted by the optical transmitting units (101) and transmits the multiplexed optical signals to the counterpart optical wireless communication device (1) and demultiplexes the optical signals from the counterpart optical wireless communication device (1) into optical signals of a plurality of wavelengths, and a plurality of optical receiving units (102) that receive optical signals of a target wavelength from the optical signals demultiplexed by the optical multiplexing / demultiplexing unit (103), and the wavelengths that are the target of the optical transmitting units (101) and the optical receiving units (102) are wavelengths that are alternately assigned in order of length, and between the pair of optical wireless communication devices (1), the wavelengths that are the target of the optical transmitting units (101) and the optical receiving units (102) are shifted by one.
Owner:MITSUBISHI ELECTRIC CORP
Optical wireless communication device and communication method based on beam shaping
The invention relates to the technical field of optical wireless communication, in particular to an optical wireless communication device and method based on beam shaping, and the device comprises a beam shaping module which comprises at least one beam shaping lens so as to convert a beam outputted by a point light source into a uniformly distributed linear or planar light field; the optical transceiver module comprises a plurality of optical base stations, the optical base stations are arranged in a redundant mode in the extension direction of the communication scene, each optical base station integrates at least one optical transmitter, an optical detector and a plurality of prisms and is used for transmitting and receiving optical signals, and the coverage range of the single optical base station is expanded through the prisms; and the dynamic demodulation module is connected with the optical detector, and dynamically adjusts the demodulation threshold value of the corresponding bit error rate according to the real-time channel state. Therefore, when the technology is applied to wireless optical communication, the communication performance can be improved, the coverage distance can be increased, the coverage uniformity can be improved, the bit error rate can be reduced, the construction cost can be reduced, and the long-term stable communication requirement of a closed scene can be met.
Owner:TSINGHUA UNIVERSITY +1
Optical wireless communication apparatus, system and method
PendingUS20250119212A1Close-range type systemsElectromagnetic network arrangementsField of viewOptical wireless communications
An optical wireless communication (OWC) transmitter apparatus comprises: a plurality of transmitters, each transmitter having a respective field-of-view in respect of which it is configured to transmit OWC signals; and a controller configured to select which of the transmitters transmit the OWC signals, thereby determining a transmission zone to which the OWC signals are transmitted by the apparatus, wherein the transmission zone comprises at least one sub-zone, each sub-zone corresponding to the field-of-view of a respective one of the transmitters.
Owner:PURELIFI
Three-dimensional positioning system and method based on bidirectional optical wireless communication
The invention designs a three-dimensional positioning system and method based on bidirectional optical wireless communication. The system comprises a base station and a mobile terminal which are respectively provided with an LED light emitting module and a PD light receiving module, and can realize the sending and receiving of a positioning signal and a communication light signal at the same time. The base stations are arranged on a ceiling in a non-collinear mode, and coordinates are known; the mobile terminal freely moves in the space, and coordinates are unknown. And the mobile terminal receives the downlink positioning signal sent by the base station by using the optical receiving module, and feeds back the positioning data to the base station through the transmitting module. While decoding downlink data, the base station multiplexes uplink optical signals, captures downlink and uplink positioning signals, and transmits these data to the server via the Ethernet. And the server assumes that the terminal is located at different height layers, estimates the two-dimensional coordinates of the terminal at each layer by using linear least square, calculates the difference between the expected RSS and the actual RSS, and selects two layers with the minimum difference to carry out weighted average estimation on the height of the terminal so as to realize three-dimensional positioning.
Owner:SICHUAN UNIV
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 device and optical wireless communication method
ActiveUS12224797B2Line-of-sight transmissionSatellite communication transmissionSpatial light modulatorTransceiver
A switching instructor outputs a beacon light selection notification signal when a optical transceiver transmits a optical wireless signal of a beacon light and outputs a signal light selection notification signal when the optical transceiver transmits the optical wireless signal of the signal light. A spatial light modulator controller performs switching of a control signal given to each of the plurality of pixels of a spatial light modulator to: cause a phase delay in light received by each of the plurality of pixels of the spatial light modulator when the switching instructor outputs the beacon light selection notification signal and cause a phase delay in light received by each of the plurality of pixels of the spatial light modulator when the switching instructor outputs the signal light selection notification signal.
Owner:NIPPON TELEGRAPH & TELEPHONE CORP
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
Freeform optics for optical wireless communications
An optical wireless communications (OWC) receiver is configured for receiving light encoded with one or more data signals from one or more light sources of one or more OWC transmitters and for generating one or more electrical signals which are representative of the received light. The OWC receiver comprises a photodetector configured to generate the one or more electrical signals, a freeform optical component comprising a plurality of lenslets, each lenslet comprising a corresponding lenslet optical surface, wherein at least one of the lenslet optical surfaces is translationally and cylindrically asymmetric, wherein the freeform optical component comprises a three-dimensional freeform optical surface which includes the lenslet optical surfaces, and wherein the freeform optical component and the photodetector are configured so that the freeform optical component directs at least a portion of the light that is incident on the freeform optical component from the light source onto the photodetector. An OWC transmitter and an OWC system are also disclosed.
Owner:PURELIFI
Display apparatus
ActiveUS12431975B2Batteries 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
Eye safe diverged beam optical wireless communications system
A diverged beam optical transmitter is provided that includes a laser source configured to emit a light beam, and one or more lenses. The diverged beam optical transmitter also includes a diffuser placed between the laser source and the one or more lenses, and configured to increase an intrinsic divergence of the light beam and to fill some portion of the one or more lenses such that the light beam is eye safe after the one or more lenses.
Owner:INNOVATIVE INTEGRATED TECHNOLOGIES LLC
Optical wireless communication with curved focal planes
Methods, systems, and devices for wireless communication are described. A user equipment (UE) in an optical wireless communication system may utilize a curved focal plane of a condenser lens to communicate optical wireless signals. An optical front end (OFE) of the UE may include one or more optical communication components located on a curved focal plane of the condenser lens at different distances from the condenser lens. Additionally or alternatively, the UE may adjust the positioning of one or more optical communication components on the curved focal plane. Additionally or alternatively, the OFE may include an array of condenser lenses and optical communication components, each optical communication component optically coupled with one or more condenser lenses. The UE may perform equal gain combination and / or equal ratio power distribution to communicate optical wireless signals using an array of condenser lenses and optical communication components.
Owner:QUALCOMM INC
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 wavelength-division multiplexing multi-user optical wireless communication system based on a spatial light modulator
ActiveCN115833989BWavelength-division multiplex systemsSpatial light modulatorMechanical engineering
The present invention discloses a wavelength-division multiplexing multi-user optical wireless communication system based on a spatial light modulator. Multi-wavelength signals from a transmitting end enter free space through a multimode optical fiber and a collimating lens, and after being expanded by an achromatic lens system, are irradiated on the spatial light modulator. After being modulated by the multi-wavelength hologram displayed on the spatial light modulator, optical signals of different wavelengths are split and deflected, and focused on corresponding receivers, realizing multi-channel signal transmission. The present invention solves the problem in traditional free-space optical communication that only point-to-point fixed transmission is supported, and multi-user and mobile users are not supported. Operations such as switching between users and multi-user power allocation can be performed, and it has the advantages of strong flexibility and easy deployment, and has good application prospects in free-space optical wireless communication systems.
Owner:SOUTHEAST UNIV
Systems and methods for optical wireless communication
A beam steering subsystem is provided in an optical communication system. The beam steering subsystem is configured for steering a free-space optical (FSO) beam from a first transceiver to a second transceiver disposed remotely from the first receiver. The beam steering subsystem includes a beam steering device disposed between the first transceiver and the second transceiver, and an optical tracking unit in optical communication and electrical communication with the beam steering device. The wherein the beam steering device is further configured to (i) receive the FSO beam from the first transceiver, (ii) receive an optical tracking signal from the second transceiver, (iii) optically relay the received optical tracking signal to the optical tracking unit, and (iv) steer the FSO beam to the second transceiver based on an electrical feedback control signal from optical tracking unit.
Owner:CABLE TELEVISION LAB INC
Retainer for optical transmitter to provide beam cutting
PendingCN119856425AMagnetic/electric field screeningLine-of-sight transmissionLight beamOptical transmitter
A holder (100) comprising: a fastening device (110) configured to secure an optical transmitter for optical wireless communication; and a mechanical side shield (120) configured to shield a portion of a beam footprint of the optical transmitter with the straight cutout.
Owner:SIGNIFY HOLDING BV
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
Optical wireless communication system and receiving device
PendingJP2025173831AImage enhancementPhotometry using reference valueInformation processingCommunications system
To provide a technique capable of estimating a camera position without having high processing performance.SOLUTION: An optical wireless communication system includes a plurality of light sources, a receiving device including an event camera, and an information processing device. Each of the plurality of light sources transmits an optical wireless communication signal. The receiving device receives the optical wireless communication signal via the event camera. The optical wireless communication signal includes position-related information for identifying a position in an absolute coordinate system of a transmission source of the optical wireless communication signal. The information processing device identifies a signal region of the optical wireless communication signal in an image plane coordinate system of an image plane obtained by the event camera to acquire a light source image position indicating a position at which each of the plurality of light sources is projected in the image plane coordinate system, acquires a light source absolute position indicating a position at which each of the plurality of light sources is located in the absolute coordinate system on the basis of the position-related information included in the optical wireless communication signal, and uses the light source image position and the light source absolute position to estimate a position and a direction of the event camera in the absolute coordinate system.SELECTED DRAWING: Figure 1
Owner:TOYOTA JIDOSHA KK
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
High-power driver for wideband optical wireless communications
An apparatus, comprising: a radio frequency (RF) amplifier; and an RF-to-optical (RF2O) driver, comprising: a transformer chain including a set of cascaded RF transformers; and an impedance matching circuit coupled in series with the transformer chain between the RF amplifier and a laser.
Owner:QUALCOMM INC
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
A wireless optical communication system
PCT designated stageWO2025177002A1Error preventionElectromagnetic transmission non-optical aspectsDigital dataCommunications system
A wireless communication system comprising: a first communication module comprising a first digital processor; and a second communication module comprising a second digital processor; wherein: wherein the first communication module comprises a first digital data interface for communication between the first communication module and a first electronic device and wherein the second communication module comprises a second digital data interface for communication between the second communication module and a second electronic device, wherein the first digital processor is coupled to the first digital data interface; and / or the second digital processor is coupled to the second digital data interface; wherein the first and second communication modules are configured to communicate through a barrier using optical wireless communication.
Owner:PURELIFI
Secure handover in Li-Fi networks
Due to the line-of-sight nature of optical wireless communication and the limited field of view of optical receivers, the coverage of an access point (120) and the overlapping coverage area of neighboring access points (120) in an optical system are smaller compared to RF systems. Supporting secure roaming of an endpoint (110) in an optical multi-cell wireless communication network (100) becomes more challenging. To address this problem, a subsystem is disclosed that selects a candidate access point for an endpoint (110) from a plurality of access points (120) based on one or more neighbor relations and informs the endpoint (110) about the candidate access point to trigger the endpoint (110) to start a process to pre-establish a new pairwise transient key between the endpoint (110) and the candidate access point (120) for a secure handover.
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
Eye-safe divergent beam optical wireless communication system
To provide an eye-safe divergent beam optical wireless communication system and a divergent beam optical transmitter.SOLUTION: The divergent beam optical transmitter includes a laser array 312 that emits an optical beam 316, one or more lenses 324 that collimate the optical beam to the overall divergence of the optical beam, a diffuser 314 that is arranged between the laser array and the lens, which increases the intrinsic divergence of the optical beam and spreads out the intrinsic divergence of the optical beam to a specific portion of the lens to be safe for the eyes after the lens. The overall divergence of the optical beam and the intrinsic divergence of the optical beam can be independently controlled. The overall divergence of the optical beam is greater than the intrinsic divergence of the optical beam.SELECTED DRAWING: Figure 3B
Owner:8 RIVERS CAPITAL LLC
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 system, method for optical wireless communication, transmitter device and receiver device
PCT designated stageWO2026013150A1Close-range type systemsVertical-cavity surface-emitting laserTelecommunications link
An optical wireless communication system including: a transmitter device having an array of Vertical-Cavity Surface-Emitting Lasers (VCSELs), wherein each VCSEL in the array is configured to emit a light beam in a different direction; and a receiver device having an array of Single Photon Avalanche Diodes (SPADs), wherein each SPAD in the array is configured to detect light from a different direction; a selective activation mechanism configured to activate a specific VCSEL and a specific SPAD based on their alignment to establish a communication link, without requiring physical alignment of the devices.
Owner:SONY SEMICON SOLUTIONS CORP +1
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