A communication device designed for an interior compartment, for example of a motor vehicle. The device includes a radiofrequency communication module and an interface module which is operationally coupled to the radiofrequency communication module in order to receive a digital signal generated by the radiofrequency communication module, and to modulate an electric power supply signal for at least one lamp, according to the digital signal, in order to generate a modulation of light emitted by the lamp according to the digital signal received from the radiofrequency communication module.

An LED light and communication system is in communication with a broadband over power line communications system. The LED light and communication system includes at least one optical transceiver light fixture. The optical transceiver light fixture includes a plurality of light emitting diodes, at least one photodetector, and a processor. A facility control unit is in communication with the light emitting diode light fixtures and a control server. The facility control unit is constructed and arranged to control the operation of the optical transceiver light fixtures.

An apparatus includes an optical phased array having multiple array elements. Each array element includes an antenna element configured to transmit or receive an optical signal. Each array element also includes an electro-optic (EO) modulator associated with the antenna element, where the EO modulator is configured to modulate the optical signal transmitted or received by the antenna element. The antenna elements may be configured to transmit optical signals, the EO modulator of each array element may be configured to perform at least one of amplitude modulation and phase modulation, where at least one of the amplitude modulations and the phase modulation is based on encoded data. The antenna elements may be configured to receive optical signals, the EO modulator of each array element may be configured to perform at least one of phase modulation and amplitude modulation, and a decoder may be configured to recover data.

Disclosed herein are methods, devices, and systems for providing timing and bandwidth management of ultra-wideband, wireless data channels (including radio frequency and wireless optical data channels). According to one embodiment, a hub apparatus is disclosed for providing out-of-band bandwidth management for a free-space-optical (FSO) data channel associated with a first device. The hub apparatus includes a processor, a memory coupled with the processor, an FSO transmitter coupled with the processor, and an FSO receiver coupled with the processor. The FSO transmitter may be configured to transmit a control signal comprising timing information and bandwidth management information.

Wireless communication using germicidal light frequencies is a system and method for transmitting and receiving data using Far-UVC light. The system communicates data using Far-UVC light of a germicidal wavelength. Far UV is a specific spectrum of UV light. The ultraviolet spectrum is a band of electromagnetic radiation with higher energy, thus shorter wavelengths, than visible light. With respect to this system, the UV light wavelengths of interest are Far-UVC for solar-blind data-carrying frequencies in the THz range to provide a UVGI function.

Embodiments relate to a bidirectional free space optical (FSO) communications system. Specifically, data-encoded FSO beams are transmitted and received between two terminals. A transmit (Tx) direction of a beam transmitted from the first terminal is dithered by a beam steering unit (BSU). As the dithered beam is received by the second terminal, the power levels of the beam are measured. The power levels are then encoded in a data-encoded FSO beam transmitted to the first terminal. This allows the first terminal to decode the received FSO beam and determine the power levels. The power levels allow the first terminal to determine Tx direction misalignments and adjust the Tx direction for the Tx beam sent to the second terminal. This process may be repeated to reduce Tx misalignments and may be performed by both terminals such that each terminal sends power level information to the opposite terminal.

A communication system for transport means is provided, by which wireless communication with high quality is realized in the interior of the transport means. A communication device to mainly perform optical wireless communication with a terminal device 2 is selected among a plurality of light source devices 3A, 3B and 3C capable of performing optical wireless communication with the terminal device 2 based on a state of an occupant in the interior of the transport means. In this way, the wireless communication with high quality is realized, as the whole system, between the terminal device 2 and the plurality of light source devices 3A, 3B and 3C.

For time-division based wireless optical networks, it is important to keep neighboring coordinators synchronized to a common time base, in order to avoid interference to a network device located in the overlapping area of such neighboring coordinators. However, given that the common time base is located remotely, there is still timing synchronization uncertainty remaining at a coordinator side. A novel auxiliary scheduler subsystem, and the related methods and systems, are disclosed in this invention. By reserving time margins in the allocated time slots by the auxiliary scheduler subsystem, interference due to timing synchronization uncertainty is reduced.

An optical wireless communications, OWC, network (100) comprises a plurality of access points (120) for communicating with a plurality of endpoint devices (110) via modulated light. A control system (13) receives a report indicating a timeslot during which a first one of the access points (120a) detected an event indicative of interference and transmits an indication of the timeslot to at least one other access point (120b). The other access point (120b) provides to the control system (13) identifiers of any registered endpoint devices which used or are using that timeslot. If the control system (13) receives an identifier of a single endpoint device from the other access point (120b), it determines that endpoint device as a cause of the interference experienced at the first access point (120a). If the control system (13) receives identifiers of plural endpoint devices from other access points (120), it causes endpoint devices in the OWC network (100) to advertise their presence.

In an optical wireless communication system including: an optical wireless communication apparatus that moves along with a first optical wireless station; and a second optical wireless station opposed to the first optical wireless station, the optical wireless communication apparatus includes at least one reference light transmitting unit that transmits reference light to the second optical wireless station with a position in front in a moving direction of the first optical wireless station defined as a transmission position, the second optical wireless station includes a reference light receiving unit that receives the reference light transmitted from the at least one reference light transmitting unit, an estimation unit that estimates an influence of atmospheric air on transmission of signal light based on a reception state of the reference light received by the reference light receiving unit, a compensation unit that performs compensation processing on the signal light based on the influence of the atmospheric air estimated by the estimation unit, and a signal light transmitting unit that transmits the signal light on which the compensation processing has been performed by the compensation unit in an arrival direction of the reference light.