Abstract: The present subject matter relates to a method comprising transmitting to a set of one or more devices, at least one radio frequency signal, the transmitting comprising: applying a current first set of analog weights to the at least one radio frequency signal to distribute the at least one radio frequency signal to antenna elements of the antenna array in accordance with a distribution of the first set of analog weights, resulting in antenna element level signals; and applying a predefined second set of analog weights to the antenna element level signals to distribute the antenna element level signals to radiators of the antenna elements in accordance with a distribution of the second set of analog weights.

Abstract: According to an aspect, an apparatus may receive at least one uplink pilot associated with a receiver comprising at least one digital beamforming, DBF, -panel and at least one subarray-based beamforming, SABBF, -panel, the at least one DBF-panel having an associated DBF-channel and the at least one SABBF-panel having an associated SABBF-channel. Furthermore, based on channel distributions of the DBF-channel and the SABFF-channel and further based on the at least one uplink pilot, the apparatus may determine at least one estimated strongest direction of a common covariance matrix associated with the at least one DBF-panel and the at least one SABBF-panel. Finally, the apparatus may determine a beamforming vector for at least one transmission phase or at least one reception phase based on the at least one estimated strongest direction of the common covariance matrix.

Abstract: A wireless device receives configuration parameters indicating: transmission of an uplink (UL) signal in a set of symbols, and a plurality of physical downlink control channel (PDCCH) monitoring occasions (MOs) for repetitions of a downlink control information (DCI). At least one PDCCH MO of the plurality of PDCCH MOs overlaps in time with the set of symbols. Based on a quantity of the at least one PDCCH MO, the wireless device cancels the transmission of the UL signal in a subset of symbols from the set of symbols or not monitor (e.g., skip monitoring) the at least one PDCCH MO.

Abstract: A beamforming based user fairness arrangement is disclosed. In the arrangement analog beamforming is adjusted using a weighted sum of client device covariance matrices. The weighted sum of covariance matrices is used in designing an analog beamformer, which is then applied to at least one phase shifter. The phase shifters provide the phase shifted radion frequency signal to antennas that are used in transmitting the radio frequency signal to client devices.

Abstract: Systems, methods, apparatuses, and computer program products for energy-efficient precoding with controllable power distribution. A method may include generating a digital precoder with controllable flatness based on at least one of a plurality of control parameters. The method may also include controlling flatness of a power distribution across a set of antennas, panels, or access points. The method may further include balancing, based on the control of the flatness of the power distribution, spectral efficiency and energy efficiency according to respective predefined values of spectral efficiency and energy efficiency. The balancing may include adjusting the at least one of the plurality of control parameters.

Abstract: According to an aspect, an apparatus may receive at least one uplink pilot associated with a receiver comprising at least one digital beamforming, DBF, -panel and at least one subarray-based beamforming, SABBF, -panel, the at least one DBF-panel having an associated DBF-channel and the at least one SABBF-panel having an associated SABBF-channel. Furthermore, based on channel distributions of the DBF-channel and the SABFF-channel and further based on the at least one uplink pilot, the apparatus may determine at least one estimated strongest direction of a common covariance matrix associated with the at least one DBF-panel and the at least one SABBF-panel. Finally, the apparatus may determine a beamforming vector for at least one transmission phase or at least one reception phase based on the at least one estimated strongest direction of the common covariance matrix.

Abstract: A method can include receiving, by an integrated access and backhaul (IAB) node, a timing case indication medium access control (MAC) control element (CE) for a first cell associated with at least two timing advance groups (TAGs). The timing case indication MAC CE can indicate a transmission timing mode. The method can also include selecting a first TAG from the at least two TAGs to apply the transmission timing mode. The method can further include transmitting an uplink signal using an uplink transmission time determined based on the transmission timing mode applied to the first TAG.

Abstract: A method can include receiving, by a wireless device, configuration parameters of a serving cell with a first physical cell identity (PCI) and an additional PCI. The configuration parameters can indicate a first timing advance group (TAG), of the serving cell, associated with a first transmission configuration indication (TCI) state; a second TAG, of the serving cell, associated with a second TCI state; a first set of random access (RA) resources associated with the first PCI of the serving cell; and a second set of RA resources associated with the additional PCI of the serving cell. The method can also include receiving a physical downlink control channel (PDCCH) order triggering an RA procedure and transmitting, via an RA resource selected from the second set of RA resources, a RA preamble for the RA procedure.

Abstract: Various example embodiments relate to a method and apparatus for two-stage beamforming. The method comprises estimating an effective channel between at least one user equipment and a plurality of access point elements; designing a short-term precoder for the effective channel, the short-term precoder being designed by solving a coverage maximization problem under a sum power constraint and at least one per-antenna power constraint; and using the short-term precoder for two-stage beamforming.

Abstract: Some embodiments of the present disclosure provide a deep-learning-based framework for designing components of a downlink precoding system. The components of such a system include downlink training pilots and channel estimation based on receipt of the downlink training pilots. Another component involves channel measurement and feedback strategy at the user equipment. The components include a precoding scheme designed at the base station based on the feedback from the user equipment.

Abstract: A network node may generate an initial precoder for a plurality of antennas, determine antenna radiated power for each of the plurality of antennas based on the initial precoder, select a subset of antennas from the plurality of antennas based on the determined antenna radiated power, generate at least one transmission precoder for at least one selected antenna of the selected subset of antennas, and perform communication with at least one user equipment device using the at least one transmission precoder and the at least one selected antenna of the selected subset of antennas.

Abstract: Systems, methods, apparatuses, and computer program products for energy-efficient precoding with controllable power distribution. A method may include generating a digital precoder with controllable flatness based on at least one of a plurality of control parameters. The method may also include controlling flatness of a power distribution across a set of antennas, panels, or access points. The method may further include balancing, based on the control of the flatness of the power distribution, spectral efficiency and energy efficiency according to respective predefined values of spectral efficiency and energy efficiency. The balancing may include adjusting the at least one of the plurality of control parameters.

Abstract: A wireless device receives one or more radio resource control (RRC) messages comprising configuration parameters of uplink switching for a plurality of bands. The plurality of bands comprise a first band associated with a first priority, and a second band associated with a second priority. The wireless device determines, for an uplink switching between the first band and the second band, an uplink switching period location to be in the first band, based on the first priority being lower than the second priority. The wireless device transmits, based on the uplink switching period location, an uplink transmission via one of the first band and the second band.

Abstract: A wireless device transmits a capability information message indicating a first switching period associated with a first band pair with a first band and a second band, and a second switching period associated with a second band pair with a third band and a fourth band. The wireless device receives configuration parameters of one or more cells indicating dual uplink for uplink switching is configured for at least two uplink carriers of the first band pair and the second band pair. A wireless device determines, based on the dual uplink, to transmit a first uplink transmission on the second band. The first band is switched to the second band on a first transmitter, and the third band and the fourth band on a second transmitter. The wireless device omits the first uplink transmission during a larger of the first switching period and the second switching period.

Abstract: A wireless device comprises one or more processors and memory storing instructions. When executed by the one or more processors, the instructions cause the wireless device to receive one or more radio resource control, RRC, messages indicating: a plurality of band pairs for uplink switching; and whether each band pair, of the plurality of band pairs, is configured with uplink switching based on dual uplink or configured with uplink switching based on switched uplink. The instructions cause the wireless device to transmit, based on a first band pair, of the plurality of band pairs, being configured with dual uplink: a first uplink transmission via a first band of the first band pair; and a second uplink transmission via a second band of the first band pair.

Abstract: Some embodiments of the present disclosure provide a deep-learning-based framework for designing components of a downlink precoding system. The components of such a system include downlink training pilots and channel estimation based on receipt of the downlink training pilots. Another component involves channel measurement and feedback strategy at the user equipment. The components include a precoding scheme designed at the base station based on the feedback from the user equipment.

Abstract: Some embodiments of the present disclosure provide a deep-learning-based framework for designing components of a downlink precoding system. The components of such a system include downlink training pilots and channel estimation based on receipt of the downlink training pilots. Another component involves channel measurement and feedback strategy at the user equipment. The components include a precoding scheme designed at the base station based on the feedback from the user equipment.

Abstract: A wireless device receives configuration parameters indicating: transmission of an uplink (UL) signal in a set of symbols, and a plurality of physical downlink control channel (PDCCH) monitoring occasions (MOs) for repetitions of a downlink control information (DCI). At least one PDCCH MO of the plurality of PDCCH MOs overlaps in time with the set of symbols. Based on a quantity of the at least one PDCCH MO, the wireless device cancels the transmission of the UL signal in a subset of symbols from the set of symbols or not monitor (e.g., skip monitoring) the at least one PDCCH MO.

Abstract: Some embodiments of the present disclosure provide a deep-learning-based framework for designing components of a downlink precoding system. The components of such a system include downlink training pilots and channel estimation based on receipt of the downlink training pilots. Another component involves channel measurement and feedback strategy at the user equipment. The components include a precoding scheme designed at the base station based on the feedback from the user equipment.