Abstract: Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for techniques for signaling control information in wireless communication systems based on orbital angular momentum (OAM) modes. One aspect provides a method for wireless communication by a transmitter. The method generally includes transmitting to a receiver, with a first orbital angular momentum (OAM) mode, a first control channel on a first time-frequency resource and transmitting to the receiver, with a second OAM mode, at least one of a data channel or a second control channel on a second time-frequency resource that at least partially overlap with the first time-frequency resource in at least one of time or frequency.

Abstract: Methods, systems, and devices for wireless communications are described. In some wireless communications systems, a wireless device may receive a message including a set of bits partitioned into a set of submessages. In some aspects, the wireless device may generate a first set of submessage candidates, interleave the first set of submessage candidates to generate a set of interleaved submessage candidates, generate a second set of submessage candidates using the set of interleaved submessage candidates, and attempt to decode the message based on the first and second pluralities of submessage candidates. In other aspects, the wireless device may generate a first set of soft information, interleave the first set of soft information to generate a set of interleaved soft information, generate a second set of soft information using the set of interleaved soft information, and attempt to decode the message based on the first and second sets of soft information.

Abstract: Methods, systems, and devices for wireless communication are described. Some wireless communications systems may support rotational alignment of a first antenna panel of a first device and a second antenna panel of a second device. The first and second devices may exchange signaling that indicates a panel rotation capability and a panel rotation procedure configuration based on the panel rotation capability. The second device may transmit a reference signal from a central antenna element of the second antenna panel based on the configuration. The first device may receive the reference signal via two antenna elements of the first antenna panel and may adjust an angular rotation of the first antenna panel based on the reference signal to modify a respective distance between each of the two antenna elements of the first antenna panel relative to the central antenna element of the second antenna panel.

Abstract: Methods, systems, and devices for wireless communications are described. Some wireless communications systems may support frequency modulated continuous waveform (FMCW)-based channel estimation. A network entity may transmit, to a user equipment (UE), a trigger for an FMCW-based channel estimation procedure. The network entity may transmit an FMCW signal to the UE via a channel based on the trigger. The UE may estimate the channel, responsive to the trigger, with a subband granularity as part of the FMCW-based channel estimation procedure. The UE may estimate the channel based on the FMCW signal, a measured delay associated with the channel, and a measured Doppler-based frequency shift associated with the channel. The UE may transmit a channel estimation report including one or more channel parameters associated with the subband granularity and based on the estimation.

Abstract: Methods, systems, and devices for wireless communication are described. A first wireless device may transmit one or more signals to a second wireless device using an antenna panel including antenna elements that are arranged in a hexagonal configuration. The signals may be transmitted using one or more directional beams for multiple-input multiple-output communications with the second wireless device, the directional beams generated based on the antenna elements in the hexagonal configuration. The first wireless device may receive a signal from the second wireless device, and in some cases, the first wireless device may transmit one or more reference signals via the one or more directional beams, the reference signals associated with a set of two or more antenna elements of the antenna panel of the first wireless device. The second wireless device may perform measurements of the reference signals and transmit a measurement report to the first wireless device.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first network node may communicate with a second network node using a line-of-sight (LOS) multiple input multiple output (MIMO) configuration at a frequency. The first network node may communicate, based at least in part on a multi-user MIMO (MU MIMO) mode, with a third network node using the LOS MIMO configuration and at the frequency, wherein the MU MIMO mode corresponds to an antenna system configuration of the rectangular antenna array, wherein the antenna system configuration includes at least one of an antenna assignment scheme, an antenna amplitude configuration, or an antenna phase configuration. Numerous other aspects are described.

Abstract: The apparatus may be a wireless device configured to detect a first trigger condition at the wireless device and transmit, for a network device, a first indication to switch from a first mode of operation associated with a first data bandwidth and a first reference signal bandwidth to a second mode of operation associated with a second data bandwidth and a second reference signal bandwidth, where at least one of the second data bandwidth is smaller than the first data bandwidth and the second reference signal bandwidth is larger than the second data bandwidth, the first data bandwidth is smaller than the first reference signal bandwidth and the second data bandwidth is smaller than the second reference signal bandwidth, or the first data bandwidth is smaller than the second data bandwidth and the first reference signal bandwidth is larger than the first data bandwidth.

Abstract: Techniques are provided for receiving OFDM radio frequency sensing reference signals which have a radio frequency bandwidth that is larger than the baseband bandwidth in the receiver. An example method for receiving a radio frequency sensing reference signal includes receiving, with a mobile device, a combed reference signal including a plurality of non-zero resource elements, wherein the combed reference signal utilizes a radio frequency bandwidth that is larger than a baseband bandwidth utilized by the mobile device, and down-converting the combed reference signal with a plurality of analog carriers to a baseband frequency, wherein the plurality of analog carriers are staggered based on the baseband bandwidth and the plurality of non-zero resource elements are received within the baseband bandwidth.

Abstract: Aspects of the disclosure relate to formula-based inter-circle precoding weight determination for orbital angular momentum (OAM) communication systems. Some aspects of the disclosure relate to apparatuses and methods for wireless communication, an apparatus comprising: a processor; antenna elements, comprising a first subset and a second subset of antenna elements; and a memory coupled to the processor, the memory storing instructions that, when executed by the processor, cause the processor to: transmit, via the first subset of antenna elements, a first reference signal using a first OAM mode; transmit, via the second subset of antenna elements, a second reference signal using the first OAM mode; and receive information indicative of a subset of antenna elements of the plurality of antenna elements to use to transmit the first OAM mode. Other aspects, embodiments, and features are also claimed and described.

Abstract: Systems and techniques for recording event data are described. In some implementations, a method may generate a network formation request based on an event. In some examples, the method may broadcast the network formation request to one or more targets. In some cases, the method may form a network including at least one of the one or more targets. In some aspects, the method may obtain, from at least one of the one or more targets, event data associated with the event. In some implementations, the method may append the event data associated with the event obtained from the one or more targets to a blockchain.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first network entity may select, in accordance with a first antenna selection policy, one or more first antennas. The first network entity may transmit, using the one or more first antennas, one or more first signals. The first network entity may obtain, based on the one or more first signals, feedback information indicative of a first performance level of the one or more first antennas. The first network entity may select, in accordance with a second antenna selection policy, one or more second antennas, wherein the second antenna selection policy is based on the feedback information. The first network entity may transmit, using the one or more second antennas, one or more second signals. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may obtain an indication of at least one rate matching configuration. The UE may communicate in a full duplex communication mode, wherein communicating in the full duplex communication mode comprises rate matching based at least in part on the at least one rate matching configuration. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communications are described. The described techniques may enable transmitting and receiving devices to increase an effective aperture size of transmitting and receiving antenna arrays, which may increase an achievable rank of spatially multiplexed communications. For example, one or both of the transmitting device and the receiving device may use a reflective component to reflect signals transmitted between the devices, which may allow for larger effective aperture sizes without increasing a physical distance between antenna elements. In some examples, the reflective component may be a static concave mirror associated with a predetermined weight vector and focal point. In some examples, the concave mirror may be a reflective intelligent surface (RIS) of reflective elements with reflective properties which may be dynamically adjusted to various weight vectors. An orientation of the RIS may be adjusted to steer a beam in various directions in space.

Abstract: Disclosed are techniques for wireless sensing. In some aspects, a method of wireless sensing protection performed by a user equipment (UE) includes receiving one or more wireless sensing signals from a sensing device; and transmitting, based on reception of the one or more wireless sensing signals, one or more spoofed wireless sensing signals indicating a presence of one or more fake target objects, fake movement of the one or more fake target objects, or both.

Abstract: Systems and techniques are provided for wireless communication. For example, an energy harvesting (EH)-capable device for wireless communication can provide, to a network entity, EH information corresponding to one or more EH characteristics of the EH-capable device. The EH-capable device can receive, from the network entity, a first radio frequency (RF) signal, wherein the first RF signal is based on the EH information. The EH-capable device can perform energy harvesting using the first RF signal.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may obtain a message vector. The wireless communication device may generate a set of message sub-vectors using the message vector. The wireless communication device may generate, using a common input linear layer, a set of message embedding vectors corresponding to the set of message sub-vectors. The wireless communication device may generate, using an artificial neural network, a set of codeword embedding vectors corresponding to the set of message embedding vectors. The wireless communication device may generate, using a common output linear layer and the set of codeword embedding vectors, a set of codeword sub-vectors permutation-equivariant relative to the set of message sub-vectors. The wireless communication device may combine the set of codeword sub-vectors to generate a codeword vector and may transmit a communication carrying the codeword vector.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, for one or more nodes, capability information regarding a beam tracking capability of a backscattering radio of the UE. The UE may perform beam tracking in accordance with the beam tracking capability. The UE may transmit, for the one or more nodes, beam information based at least in part on the beam tracking. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communications are described. A receiving device may receive, from a transmitting device, a configuration indicating a set of orbital angular momentum (OAM) modes for joint reporting, where at least one of the set of OAM modes is associated with transmission via two or more of a plurality of sets of antennas arranged in a set of concentric circular arrays. The receiving device may transmit, to the transmitting device, a report indicating precoding information for each of at least a subset of the set of OAM modes, where the precoding information includes one or more first parameters common to the set of OAM modes and one or more second parameters for respective ones of the at least the subset of the set of OAM modes.

Abstract: Methods, systems, and devices for wireless communications are described. A first device may select, from multiple orbital angular momentum (OAM) modes, a set of one or more primary OAM modes and a set of one or more secondary OAM modes, where at least one primary OAM mode is activated periodically and at least one secondary OAM mode is activated based on a trigger. The first device may transmit, to a second device, a message indicating a configuration for the selected set of one or more primary OAM modes, the selected set of one or more secondary OAM modes, and discontinuous reception (DRX) parameters for each of the sets of OAM modes. The second device may monitor for a signal using a primary OAM mode using the DRX parameters for the set of primary OAM modes, and the second device may activate a second OAM mode based on receiving the signal.

Abstract: A first device may transmit an indication of a base graph recommendation. A second device may receive the indication of the base graph recommendation. The second device may select a base graph from a plurality of base graphs based on the base graph recommendation. The second device may transmit an indication of the selected base graph from the plurality of base graphs after the selection of the indication of the base graph recommendation. The first device may receive the indication of the selected base graph from the plurality of base graphs after an output of the indication of the base graph recommendation. The second device may transmit a low density parity check (LDPC) coded transmission based on the selected base graph. The first device may receive the LDPC coded transmission based on the selected base graph.