Abstract: Certain aspects of the present disclosure provide a method for wireless communications at a first node, generally including obtaining assistance information using at least one optical sensor and participating in optical wireless communication (OWC) with a second node with beam steering based on the assistance information.

Abstract: Methods, systems, and devices for wireless communications are described. A forwarding device (e.g., a reconfigurable intelligent surface (RIS)) may transmit a capability message indicating one or more timing parameters associated with a time duration for the forwarding device to switch a set of forwarding elements from forwarding in a first direction to forwarding in a second direction. The forwarding device may receive, based on the indicated one or more timing parameters, one or more control messages that instructs the forwarding device to forward signal energy in the first direction during a first symbol period and to forward signal energy in the second direction during a second symbol period. The first symbol period may be different from the second symbol period. The forwarding device may include a primary array including a first set of forwarding elements and a secondary array including a second set of forwarding elements.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive synchronization signal blocks (SSBs) indicating an uplink transmit power and a first set of optical front-end (OFE) parameters for a network entity. The UE may transmit control signaling, indicating a second set of OFE parameters for the UE, with the uplink transmit power. The UE may transmit uplink signaling according to updated parameters based on the first set of OFE parameters. In some implementations, a UE may receive SSBs indicating a first uplink transmit power and a target uplink reception power and may transmit a first RACH message with a second uplink transmit power based on the first uplink transmit power. The UE may transmit a second RACH message according to a third uplink transmit power based on an uplink path loss indicated in a received RACH response message and the target uplink reception power.

Abstract: An apparatus is disclosed, which includes a Doppler radar and its various modifications, designed to function as a musical instrument transducer. This transducer is capable of converting vibrations from the instrument into audio electronic signals. Additionally, the methods by which this transducer can be strategically placed and mounted on different types of musical instruments are also described, ensuring optimal performance and sound quality.

Abstract: This disclosure provides systems, methods, and devices for wireless communication that support local light biasing for silicon photomultiplier (SiPM)-based photodetectors used in optical wireless communication (OWC). In a first aspect, a photodetector may include a silicon photomultipier (SiPM) having an input sensor configured to detect a light signal and an output interface configured to produce an output signal proportional to an intensity of the light signal detected at the input sensor, and a controllable light source positioned to emit a biasing light signal within a field of view of the input sensor, wherein the controllable light source is configured to emit the biasing light signal within a sensitivity range of the SiPM. When such photodetector is implemented in an OWC receiver, an analysis of the output signal allows the OWC receiver to adjust the biasing light at the controllable light source. Other aspects and features are also claimed and described.

Abstract: Methods, systems, and devices for wireless communications for a user equipment (UE) are described. The UE may receive an indication of a subband configuration for an operating bandwidth of the UE, the subband configuration indicating a division of the operating bandwidth into multiple subbands. The UE may perform multiple uplink power control procedures for the subbands to obtain subband-specific transmit powers for the subbands. The UE may transmit one or more uplink messages via the subbands using the subband-specific transmit powers obtained from the uplink power control procedures. In some examples, the UE may transmit uplink reference signals via the subbands, and receive, such as from a network entity, an indication of measurements corresponding to the reference signals. The UE may obtain the subband-specific transmit powers based on the measurements.

Abstract: 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.

Abstract: Some wireless communications systems may utilize optical wireless communication (OWC) to transmit or receive information. For instance, a first device may communicate with a second device via an OWC link. Some OWC systems may operate in an optical spectrum between approximately 1011 and 1016 hertz. Some examples of the techniques described herein may provide communication performance improvements by utilizing frequency-dependent communication structures for OWC. For example, frequency-dependent constellation patterns may be utilized for a codeword. Utilizing frequency-dependent constellation patterns may contrast with some approaches that utilize one modulation and coding scheme (MCS) per codeword. In some aspects, allocated frequency domain resources may be arranged into subbands with different MCSs. In some examples, an optical channel with relatively little or no fading may allow streamlining of channel state or control signaling. For example, MCS patterns may be updated relatively less frequently.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, from a network entity via an optical wireless communication link, a first optical wireless signal using photodetectors positioned on a photodetector panel of the UE. The photodetector panel may include a hole around which the photodetectors are positioned and may be located a first distance from a curved optical device of the UE via which the first optical wireless signal is received. The UE may transmit, to the network entity via the optical wireless communication link, a second optical wireless signal using a light source of the UE that is located a second distance from the curved optical device via which the second optical wireless signal is transmitted. The second optical wireless signal may pass through the hole in the photodetector panel based on the second distance being greater than the first distance.

Abstract: In an aspect, an OWC transmitter transmits, to an OWC receiver, a first DC bias parameter, receives, from the OWC receiver, DC bias feedback based on a measurement associated with an OWC link between the OWC transmitter and the OWC receiver, and transmits an OWC signal with a second DC bias parameter that is based on the DC bias feedback from the OWC receiver. In another aspect, an OWC receiver receives, from an OWC transmitter, a first DC bias parameter, transmits DC bias feedback based on a measurement associated with an OWC link between the OWC transmitter and the OWC receiver, and receives, from the OWC transmitter, an OWC signal having a second DC bias parameter based on the DC bias feedback.

Abstract: Certain aspects of the present disclosure provide a method for wireless communications at a first node, generally including obtaining assistance information using at least one optical sensor and participating in optical wireless communication (OWC) with a second node with beam steering based on the assistance information.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, from a network entity via an optical wireless communication link, a first optical wireless signal using photodetectors positioned on a photodetector panel of the UE. The photodetector panel may include a hole around which the photodetectors are positioned and may be located a first distance from a curved optical device of the UE via which the first optical wireless signal is received. The UE may transmit, to the network entity via the optical wireless communication link, a second optical wireless signal using a light source of the UE that is located a second distance from the curved optical device via which the second optical wireless signal is transmitted. The second optical wireless signal may pass through the hole in the photodetector panel based on the second distance being greater than the first distance.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) in an optical wireless communications system may utilize a curved focal plane of a condenser lens to communicate an optical wireless signal. An optical front-end (OFE) of the UE may include one or more optical communication components located at varying distances from the condenser lens on a curved focal plane of the condenser lens. Additionally or alternatively, the UE may adjust a position 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 optically coupled with one or more condenser lenses. The UE may perform equal gain combination and/or equal ratio power splitting to communicate an optical wireless signal using the array of condenser lenses and optical communication components.

Abstract: In an aspect, an OWC transmitter transmits, to an OWC receiver, a first DC bias parameter, receives, from the OWC receiver, DC bias feedback based on a measurement associated with an OWC link between the OWC transmitter and the OWC receiver, and transmits an OWC signal with a second DC bias parameter that is based on the DC bias feedback from the OWC receiver. In another aspect, an OWC receiver receives, from an OWC transmitter, a first DC bias parameter, transmits DC bias feedback based on a measurement associated with an OWC link between the OWC transmitter and the OWC receiver, and receives, from the OWC transmitter, an OWC signal having a second DC bias parameter based on the DC bias feedback.

Abstract: This disclosure provides systems, methods, and devices for wireless communication that support local light biasing for silicon photomultiplier (SiPM)-based photodetectors used in optical wireless communication (OWC). In a first aspect, a photodetector may include a silicon photomultipier (SiPM) having an input sensor configured to detect a light signal and an output interface configured to produce an output signal proportional to an intensity of the light signal detected at the input sensor, and a controllable light source positioned to emit a biasing light signal within a field of view of the input sensor, wherein the controllable light source is configured to emit the biasing light signal within a sensitivity range of the SiPM. When such photodetector is implemented in an OWC receiver, an analysis of the output signal allows the OWC receiver to adjust the biasing light at the controllable light source. Other aspects and features are also claimed and described.

Abstract: According to some embodiments, an unmanned vehicle includes a power supply configured to supply an electrical power signal to a motor for propelling the unmanned vehicle, a wireless communication device configured to transmit or receive a radio frequency (RF) signal, and a motor feed antenna coupled to the power supply and the wireless communication device, the motor feed antenna configured to conduct the electrical power signal from the power supply to the motor, and to transmit or receive RF signals as an antenna for the wireless communication device.

Abstract: According to some embodiments, an unmanned vehicle includes a power supply configured to supply an electrical power signal to a motor for propelling the unmanned vehicle, a wireless communication device configured to transmit or receive a radio frequency (RF) signal, and a motor feed antenna coupled to the power supply and the wireless communication device, the motor feed antenna configured to conduct the electrical power signal from the power supply to the motor, and to transmit or receive RF signals as an antenna for the wireless communication device.

Abstract: Described herein are techniques for self-synchronization of wireless nodes. For example, the technique may involve determining a repetition rate for receiving a signal from another access point, wherein the repetition rate identifies the another access point. The technique may also involve receiving at the access point an unmodulated impulse radio (IR) ultra wide band (UWB) pulse train from the another access point during a transmission interval associated with the repetition rate. The technique may also involve synchronizing a first clock associated with the access point to a clock associated with the another access point based on the received unmodulated IR UWB pulse train.

Abstract: Described herein are techniques for self-synchronization of wireless nodes. For example, the technique may involve determining a repetition rate for receiving a signal from another access point, wherein the repetition rate identifies the another access point. The technique may also involve receiving at the access point an unmodulated impulse radio (IR) ultra wide band (UWB) pulse train from the another access point during a transmission interval associated with the repetition rate. The technique may also involve synchronizing a first clock associated with the access point to a clock associated with the another access point based on the received unmodulated IR UWB pulse train.

Abstract: A mobile communication device includes an alerting mechanism comprising a light source, wherein the light source is configured to alert the user via a visual alert that an event has, or is, occurring. The event can be an incoming communication, a voice message, an alarm etc. The visual alert can be synchronized with an audible alert also included in the mobile communication device.