Abstract: Certain aspects of the present disclosure provide techniques and apparatus for calibrating radio frequency (RF) circuits using machine learning. One example method generally includes calibrating a first subset of RF circuit calibration parameters. Values are predicted for a second subset of RF circuit calibration parameters based on a machine learning model and the first subset of RF circuit calibration parameters. The second subset of RF circuit calibration parameters may be distinct from the first subset of RF circuit calibration parameters. At least the first subset of RF circuit calibration parameters is verified, and after the verifying, at least the first subset of RF circuit calibration parameters are written to a memory associated with the RF circuit.

Abstract: Systems, methods, and devices to reduce the channel estimation overhead by collecting data from many UEs and building a location-based mathematical model are disclosed. During building of the model, a reference signal is used to collect location- and signal-related data from connected UEs. Once the model is successfully built, it is then transmitted and/or downloaded to each new UE that connects to the base station. The UEs and/or the base stations then use this model to determine their own transmission parameter values. The UEs also report their location to the base stations, which use the model to estimate channel conditions and adapt transmission parameters for themselves.

Abstract: The embodiments herein relate to a method performed by a UE (900) for providing a channel state information (CSI) feedback in a wireless communication system including at least the UE and a gNB (800) or a radio network node. The UE (900) is operative, by means of e.g. the processor (910) to: estimate the MIMO channel between the gNB (800) and the UE (910) based on received DL reference signals for the configured resource blocks. The UE (900) is further operative to calculate, based on a performance metric, a precoder matrix, for a number of antenna ports of the gNB (800) and configured subbands, the precoder matrix being based on two codebooks and a set of combination coefficients for complex scaling/combining one or more of vectors selected from a first codebook and a second codebook, and the UE (900) is operative to report a CSI feedback and/or a PMI and/or a PMI/RI, to the gNB (800), used to indicate the precoder matrix for the configured antenna ports and resource blocks.

Abstract: An amplification subsystem for a communication system includes a downstream amplifier configured to transmit a downstream signal within a first frequency range, an upstream amplifier configured to transmit an upstream signal within a second frequency range, and a bidirectional amplifier configured to selectively transmit a mid-band signal in either of the upstream and downstream direction.

Abstract: Methods and apparatuses for beam management after channel setup. A method of operating a user equipment (UE) includes receiving at least one of synchronization signal/physical broadcast channel block (SSB) or channel state information reference signal (CSI-RS), measuring the at least one of the SSB or the CSI-RS, and determining downlink (DL) quasi-co-location (QCL) properties for DL communication based on the at least one of the SSB or the CSI-RS. The method further includes determining an uplink (UL) spatial domain filter for UL communication, receiving DL channels using the determined DL QCL properties until only one of only one joint TCI state or only one DL TCI state is configured, activated, or indicated to the UE, and transmitting UL channels using the determined UL spatial domain filter until only one of only one joint TCI state or only one UL TCI state is configured, activated, or indicated to the UE.

Abstract: A front-end antenna system for transmitting and receiving one or more beams and including at least one of a radio frequency (RF) stage, an intermediate frequency (IF) stage, and a digital stage includes one or more beam networks configured to form one or more signal streams over the one or more beams, where each beam network from among the one or more beam networks comprises a beamformer network, a switching network, or a combination thereof. The front-end antenna system includes an array of antennas configured to output each of the beams in a selected spatial region from among a plurality of spatial regions, where one or more antennas from among the array of antennas are multiport antennas. The front-end antenna system includes a plurality of transceivers that electrically couple the array of antennas and the one or more beam networks.

Abstract: Satellite communication methods and payloads are described. The payload and methods are designed to enable effective use of carrier signals in the guard band region of a channelized band of spectrum. An on-board digital channelizer may implement a band edge power monitor for measuring power spectral density in the band edges of a channel and, if it exceeds a preset threshold level, downscaling the signal amplitude in the band edges to prevent hardware damage to the payload. The channelizer may further implement a band edge gain adjustment filter for shaping the overall frequency response to flatten the response across adjacent channels, including through the guard band region between the passbands of the adjacent channels.

Abstract: Technologies directed to channel state information (CSI) sending in the 2.4 GHz band are described. A method includes receiving first CSI data representing channel properties of a wireless channel used by first and wireless devices that operates in the 2.4 GHz band. The method generates CSI samples at a first sampling rate. If the method determines that a first value, representing quality of the CSI samples, satisfies a threshold criterion, the method generates second CIS samples at a second higher sampling rate while alternating between each of multiple wireless channels in the specified amount of time. The method determines a score for each channel subcarrier index of a set of channel subcarrier indexes using the second CSI samples and identifies a subset based on the score. Using the second CSI samples corresponding to the subset, the method determines a motion condition or a no-motion condition within a geographical region.

Abstract: Disclosed is a high frequency beam forming device. The high frequency beam forming device includes a 2D radiation array structure unit in which oscillators coupled to antennas are arranged in 2D; and a plurality of phase difference detectors coupled between the oscillators formed in the 2D radiation array structure unit to detect a phase difference between the coupled oscillators.

Abstract: According to one aspect, an embodiment radio frequency receiver device comprises an input interface configured to receive a radio frequency signal of a given type and convert same into an electric signal, a detector configured to detect at least one voltage level in the electric signal, a pulse generator configured to generate at least one pulse train representative of the voltage levels detected, and a processing unit configured to determine the type of the radio frequency signal from the at least one pulse train.

Abstract: Various embodiments of the present disclosure provide a method for transmitting or receiving a signal in a wireless communication system, and a device supporting same. For a more specific example, disclosed are a method and a device supporting same, the method comprising: receiving one or more downlink reference signal (DL RS) resources on the basis of one or more reception beams; determining a reception beam satisfying a specific condition from among the one or more reception beams; transmitting information on an index of a DL RS resource received via the determined reception beam; and transmitting an uplink reference signal (UL RS) in a direction corresponding to the index of the DL RS resource.

Abstract: Disclosed are techniques for wireless communication. In an aspect, a UE determines a frequency hopping pattern for transmission of a physical random access channel (PRACH) preamble based on an associated PRACH coverage enhancement (CE) level, and transmits the PRACH preamble in accordance with the frequency hopping pattern and the associated PRACH CE level. A base station receives the PRACH preamble, and transmits a response (e.g., Msg2 or MsgA) to the PRACH preamble.

Abstract: A multi-chip integrated circuit and an interactive communication method for the multi-chip integrated circuit are provided. The multi-chip integrated circuit includes multiple low-voltage chips connected in series with each other instead of an ultra-high voltage chip, to reduce requirements on technology for the chip. In addition, the multiple chips communicate with each other through internal communication ports based on a differential signal, to enhance reliability of communication. Two adjacent chips are connected in series and a low-voltage power supply is arranged, so that a voltage difference between communication ports of the two adjacent chips is small.

Abstract: Methods, apparatus and non-transitory machine-readable mediums are provided for wireless access in communications networks comprising radio access network nodes and wireless light communication network nodes. In one embodiment, a method is performed by a radio access network node for selecting a transmit or receive beam for communication with a wireless device in a communication network. The radio access network node comprises a plurality of antenna elements configurable to provide a plurality of transmit or receive beams. The communication network further comprises one or more wireless light communication, LC, network nodes.

Abstract: A method for operating a user equipment (UE) for channel state information (CSI) feedback in a wireless communication system is provided. The method comprises receiving, from a base station (BS), CSI reference signals (CSI-RSs) and CSI feedback configuration information, estimating a channel based on the received CSI-RSs, determining, based on the estimated channel and the CSI feedback configuration information, a number of non-zero coefficients (KlNZ) for each layer (l) of a total number of ? layers, wherein ??1 is a rank value, and a sum of the KlNZ across each of the ? layers as a total number of non-zero coefficients (KNZ), where KNZ=?l=1?KlNZ. The method further comprises transmitting, to the BS, the CSI feedback including the KNZ value over an uplink (UL) channel.

Abstract: Methods, systems, and devices for wireless communications are described. A method of wireless communication at a user equipment (UE) is described that may include receiving a data packet transmission over a wireless channel from a base station. The method may further include determining a set of intrinsic log likelihood ratios (LLRs) based at least in part on the data packet transmission and determining an accumulated capacity for the wireless channel based at least in part on the set of intrinsic LLRs. The method may also include determining a channel quality indicator index or a transmission rank for the wireless channel based at least in part on the accumulated capacity and transmitting a feedback message that indicates the channel quality indicator index or the transmission rank for the wireless channel to the base station.

Abstract: Methods and systems are provided for dynamically adjusting broadcast beam patterns of a wavefront emitted by an antenna array based on the velocities of devices communicatively coupled to the base station associated with the antenna array. The broadcast beam patterns can be adjusted by modifying the broadcast mode or at least one phase, amplitude, or power of the at least one antenna associated with the base station. Adjusting the beam pattern, for example between multiple beams and a single unified beam, based on device types can improve the quality of service for the devices and reduce the processing burden of the base station.

Abstract: A radio network element includes at least one processor and at least one memory including computer program code. The at least one memory and the computer program code are configured to, with the at least one processor, cause the radio network element to: configure a quasi-co-location-type information entry included in a transmission configuration indication state (S604) for a downlink transmission beam between the radio network element and a user equipment based on at least one beam report, the at least one beam report including at least one transmission parameter for the downlink transmission beam, and the quasi-colocation-type information entry being indicative of one or more sources of inter-beam-interference on the downlink transmission beam at the user equipment; and transmit the transmission configuration indication state including the quasi-co-location-type information entry to the user equipment (S606).

Abstract: Methods and apparatuses are provided for ensuring, for a unified TCI framework, a MAC CE format for associating code-point of a TCI field, and a TCI state for DL/UL beam indications. A UE can receive a MAC CE for associating at least one TCI state with at least one code-point of a TCI field in a DCI, wherein the MAC CE comprises at least a first octet including a first TCI state ID field associated with a first TCI state and a first field indicating DL or UL for the first TCI state, a second octet including a second TCI state ID field associated with a second TCI state and a second field indicating DL or UL for the second TCI state, and a third octet including a third field for the UE to determine whether the first TCI state and the second TCI state are associated with a same code-point or different code-points of the TCI field.

Abstract: Systems and methods relating to transmission and use of Discovery Reference Signal (DRS) signals are disclosed in herein. In some embodiments, a method of operation of a Transmission Point (TP) in a cellular communications network comprises transmitting, from the TP, a same one or more DRS signals using at least two different transmit beams in at least two different time resources. Each transmit beam is characterized by a direction in which it is transmitted. In this manner, the TP is enabled to reuse DRS resources, which in turn enables transmission of DRS signals on a larger number of transmit beams and, correspondingly, adaptation of measurement procedures at wireless devices to obtain measurements on those transmit beams.