The present disclosure relates to a method (100) for determining an angle of arrival, AoA, of received radio frequency, RF, measurement signals. The method (100) comprises obtaining (101) measurement data based on the received RF measurement signals from an antenna array, wherein the RF measurement signals are representative of multiple frequency channels. The method (100) further comprises determining (102) power spectra, comprising determining at least one power spectrum for each of the multiple frequency channels by using the measurement data. The method (100) further comprises providing (105) a machine learning algorithm, which is pre-trained to determine an AoA based on power spectra of multiple frequency channels. The method (100) further comprises determining (106) the AoA of the received RF measurement signals by using the machine learning algorithm and the determined power spectra.

The present disclosure relates to a method (100) for determining an angle of arrival, AoA, of received radio frequency, RF, measurement signals. The method (100) comprises obtaining (101) measurement data based on the received RF measurement signals from an antenna array, wherein the RF measurement signals are representative of multiple frequency channels. The method (100) further comprises determining (102) power spectra, comprising determining at least one power spectrum for each of the multiple frequency channels by using the measurement data. The method (100) further comprises providing (105) a machine learning algorithm, which is pre-trained to determine an AoA based on power spectra of multiple frequency channels. The method (100) further comprises determining (106) the AoA of the received RF measurement signals by using the machine learning algorithm and the determined power spectra.

Systems and methods provide for beam detection in a wireless communication system. An apparatus for a UE may be configured to identify a plurality of CSI-RS resources corresponding to different Tx beams configured for measurement by the UE, measure an L1-RSRP for the plurality of CSI-RS resources, determine a selected Tx beam of the different Tx beams based on measured L1-RSRP values for the plurality of CSI-RS resources, and determine a measurement accuracy of a first L1-RSRP value corresponding to the selected Tx beam based on successful beam detection probability.

Embodiments of the present disclosure disclose a method and an apparatus for measuring sidelink reference signal received power, and a communications device. The method for measuring sidelink reference signal received power is applied to a terminal and includes: determining a measurement port for a sidelink reference signal; and obtaining reference signal received power based on the determined measurement port.

Inform a master node about the feasible of secondary node cells during resumption of dual connectivity may require a large message. Additionally, the message may need to be encrypted. A solution to overcome the size and security limitation is to report a short identifier (or index) which is only shared between the UE and the MN. Accordingly, an apparatus, e.g., a UE, may be configured to receive, from a master node, a configuration comprising a mapping of cell identities for a plurality of secondary cells for reporting SN measurements and transmitting an SN report comprising measurements for at least a subset of the plurality of secondary cells using the mapping of cell identities. The apparatus may be configured to receive, from a first master node, a configuration for MN-DC, enter an inactive state or an idle state, and resume a connected state with a second master node.

An apparatus and a method for improving nonlinearity of a power amplifier in a wireless communication system are provided. A transmission apparatus in a wireless communication system comprises: at least one processor; a transceiver; and an amplifier for amplifying a signal provided from the transceiver, wherein if a power of a signal inputted into the transceiver is smaller than a reference value, the transceiver attenuates the power of the signal based on a gain compensation value corresponding to the power of the signal.

A communication system includes a movable terminal device and a plurality of communication devices configured to perform radio communication with the terminal device. The communication devices include a large-scale communication device having a first range in which communication with said terminal device is possible and a small-scale communication device having a second range in which said communication is possible. The first range is larger than the second range. A handover of the terminal device from the large-scale communication device to the small-scale communication device is prohibited whenever (a) the small-scale communication device is connected with the large-scale communication device by a dedicated line, (b) said small-scale communication device operates by using functionality of the large-scale communication device, or (c) the small-scale communication device is located within the first range of the large-scale communication device.

A communication system includes a movable terminal device and a plurality of communication devices configured to perform radio communication with the terminal device. The communication devices include a large-scale communication device having a first range in which communication with said terminal device is possible and a small-scale communication device having a second range in which said communication is possible. The first range is larger than the second range. A handover of the terminal device from the large-scale communication device to the small-scale communication device is prohibited whenever (a) the small-scale communication device is connected with the large-scale communication device by a dedicated line, (b) said small-scale communication device operates by using functionality of the large-scale communication device, or (c) the small-scale communication device is located within the first range of the large-scale communication device.

A radio communication apparatus according to an exemplary aspect includes: a detection unit configured to detect an object flying in the vicinity of a propagation path of directional radio waves; a distance calculation unit configured to calculate a distance between the propagation path of the radio waves and the object detected by the detection unit; a change amount determination unit configured to determine a change amount of a transmission power value used in performing transmission of the radio waves in accordance with the distance calculated by the distance calculation unit; and a signal control unit configured to control the transmission power value based on the change amount determined by the change amount determination unit. The change amount determination unit adopts a positive value as the change amount when the calculated distance is equal to or smaller than the prescribed distance.

A radio communication apparatus according to an exemplary aspect includes: a detection unit configured to detect an object flying in the vicinity of a propagation path of directional radio waves; a distance calculation unit configured to calculate a distance between the propagation path of the radio waves and the object detected by the detection unit; a change amount determination unit configured to determine a change amount of a transmission power value used in performing transmission of the radio waves in accordance with the distance calculated by the distance calculation unit; and a signal control unit configured to control the transmission power value based on the change amount determined by the change amount determination unit. The change amount determination unit adopts a positive value as the change amount when the calculated distance is equal to or smaller than the prescribed distance.