An unmanned aerial vehicle (UAV) uses a first baseband processor to establish a first communication link with a ground station of a wireless network and a second baseband processor that establishes a second communication link with a user device. The second baseband processor for processing a radio transmission from a user equipment. The second baseband processor is communicatively coupled to the first baseband processor such that the radio transmission is communicated to the ground station via the first communication link. Flight-control hardware steers the UAV along a flight trajectory that is determined by a ground-based UAV controller based at least on the radio transmission, such that the UAV or the ground station can locate or track the user equipment.

Under one aspect, a method is provided for processing a received signal, the received signal including a desired signal and an interference signal that spectrally overlaps the desired signal. The method can include obtaining an amplitude of the received signal. The method also can include obtaining an average amplitude of the received signal based on at least one prior amplitude of the received signal. The method also can include subtracting the amplitude from the average amplitude to obtain an amplitude residual. The method also can include, based upon an absolute value of the amplitude residual being less than or equal to a first threshold, inputting the received signal into an interference suppression algorithm so as to generate a first output including the desired signal with reduced contribution from the interference signal.

Systems and methods are disclosed herein that relate to Peak-to-Average Power Ratio (PAPR) reduction in a MIMO OFDM transmitter system. In some embodiments, a method of operation of a transmitter system includes, for each carrier of two or more carriers, performing precoding of frequency-domain input signals for the carrier to provide frequency-domain precoded signals for the carrier, the frequency-domain input signals for the carrier being for a plurality of transmit layers for the carrier, respectively. The method further includes processing the two or more pluralities of frequency-domain precoded signals for the two or more carriers, respectively, in accordance with a multi-carrier processing scheme to provide a plurality of multi-carrier time-domain transmit signals for a plurality of antenna branches, respectively, of the MIMO OFDM transmitter system. The multi-carrier processing scheme provides PAPR reduction for Cyclic Prefixes (CPs) of the plurality of multi-carrier time-domain transmit signals for the plurality of antenna branches.

Provided are an information feedback method, terminal, base station, a storage medium, and an electronic device. The method includes: decomposing a channel state information (CSI) matrix H to obtain a matrix U.sub.d and a matrix V.sub.d, where U.sub.d is a matrix having d columns, and every two column vectors are mutually orthogonal; and V.sub.d is a matrix having d columns, and every two column vectors are mutually orthogonal; and feeding back amplitude and phase information of elements in U.sub.d including d left eigenvectors and/or amplitude and phase information of elements in V.sub.d including d right eigenvectors.

Disclosed are a method and device for transmitting data. The method comprises: a transmitting terminal determines in N basic parameter sets a first target basic parameter set of a first beam for transmitting first data, different basic parameter sets of the N basic parameter comprising different frequency-domain base parameter sets and/or different time-domain basic parameter sets, and N being an integer greater than or equal to 2; and the transmitting terminal transmits the first beam on a time-domain resource, a spatial-domain resource, and a frequency-domain resource based on the first target basic parameter set; this can be adapted to requirements of diverse data in a network.

A method by a terminal, a method by a base station, a terminal, and a base station are provided. The method by the terminal includes receiving a first channel state information reference signal (CSI-RS) and a second CSI-RS from a base station; generating channel state information (CSI) based on both the first CSI-RS and the second CSI-RS; and reporting the CSI to the base station, wherein the CSI includes a rank indicator (RI) and a channel quality indicator (CQI).

An apparatus may operate in a dual connectivity mode in which the apparatus is simultaneously connected to carriers of different radio access technologies. The apparatus may operate via a first antenna set of a plurality of antenna sets, the first antenna set including a first communication path. The apparatus may determine to operate via a second antenna set of the plurality of antenna sets based on whether one or more criteria is satisfied. The apparatus may select at least one second communication path for the second antenna set based on the one or more criteria. The apparatus may operate via the second antenna set over the at least one second communication path when the criteria is satisfied.

The present disclosure relates to a communication technique for converging an IoT technology with a 5G communication system for supporting a higher data transmission rate beyond a 4G system, and a system therefor. The present disclosure may be applied to an intelligent service (for example, a smart home, a smart building, a smart city, a smart car or connected car, healthcare, digital education, retail business, a security and safety related service, or the like) on the basis of a 5G communication technology and an IoT related technology. The present invention relates to a wireless communication system. More specifically, disclosed is a method and apparatus for transmitting a control signal associated with uplink data transmission by a terminal when the terminal performs uplink transmission.

Methods, systems, and devices for wireless communications are described. A first wireless device may communicate with a second wireless device using a first set of beams including a first beam and a second beam, where the first and second beams are generated via first and second sets of antenna elements, respectively. The first wireless device may compare a first power associated with the first beam and a second power associated with the second beam, and may determine that at least one antenna element from the first set of antenna elements, the second set of antenna elements, or both, is defective based on the comparison. The first wireless device may switch from the first set of beams to a second set of beams based on the at least one antenna element being defective, and communicate with the second wireless device using the second set of beams.

This disclosure provides systems, methods, and devices for wireless communication that support mechanisms for sidelink beamforming alignment over a set of resources based on a deterministic sequence in a wireless communication system. In aspects, an sidelink initiator user equipment (UE) may initiate a beamforming alignment procedure with a responder UE over a the sidelink. The initiator UE may define a set of subchannels specified by a deterministic sequence. The set of subchannels may be subchannels over which the initiator UE may perform reception beam sweeping. The deterministic sequence may be anchored to a direct frame number (DFN) of the sidelink frame without initial sensing, and may be determined via a sequence index, as a function of sidelink UE identification ID(s), or a combination thereof. In this manner, the number of bits for indicating the deterministic sequence to the responder UE may be reasonable, manageable, and/or moderate.