A method of wireless communication may include monitoring, by a first device, a medium for frames in response to preparing to transmit a first frame to a second device. The method may also include while monitoring the medium and before transmitting the first frame, obtaining a second frame transmitted by a third device in the medium and adjusting a transmission of the first frame to the second device in the medium based on obtaining the second frame.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may support synchronization signal block (SSB) coverage extension for a sub-terahertz (sub-THz) band. The UE may monitor for multiple primary synchronization signals (PSSs) in a first instance of an SSB, a number of PSSs determined by the base station based on a periodicity of the SSB. The UE may combine the PSSs and determine a frequency offset for the SSB. The UE may monitor for additional instances of the SSB in accordance with the frequency offset. In some examples, the UE may monitor for one or more secondary synchronization signals (SSSs) in the first and additional instances of the SSB and combine the SSSs. In addition, the UE may monitor for a physical broadcast channel (PBCH) in the first and additional instances of the SSB, and decode the PBCH using log-likelihood ratio (LLR) combining.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may determine downlink (DL) channel state information; and transmit a first sounding reference signal (SRS) and a second SRS, wherein the second SRS is precoded based at least in part on the DL channel state information. Numerous other aspects are provided.

An arrangement is disclosed where in a multi-carrier communication system, the modulation scheme, coding attributes, training pilots, and signal power may be adjusted to adapt to channel conditions in order to maximize the overall system capacity and spectral efficiency without wasting radio resources or compromising error probability performance, etc.

The present invention provides a data transmission method, apparatus and system. The method includes: in a detection period, receiving a first pilot signal sent by an unmanned aerial vehicle (UAV), the first pilot signal being a downlink signal obtained by modulating a useful signal at a preset candidate frequency, and the preset candidate frequency including a frequency in a same frequency band and/or different frequency bands; determining a downlink operating frequency from the preset candidate frequency according to the first pilot signal; sending a first feedback signal to the UAV, the first feedback signal including information about the downlink operating frequency; and receiving downlink data sent by the UAV and modulated at the downlink operating frequency. In this way, frequency detection in a same frequency band and/or across frequency bands is implemented to select an optimal preset candidate frequency as an operating frequency, so that data transmission between a UAV and a remote control is more stable, interference from an external signal is reduced, and quality of data transmission between the UAV and a ground end is improved.

Various aspects of the disclosure relate to distributed multiple-input multiple-output (MIMO) communication such as coordinated beamforming or Joint MIMO. In some aspects, distributed MIMO is used to support communication in a cluster of wireless nodes (e.g., access points). A distributed MIMO scheduling scheme as taught herein is used to schedule the wireless nodes (e.g., access points and/or stations) operating within the cluster. For example, stations may be scheduled across basis services sets of the access points for a downlink transmission and/or an uplink transmission.

Provided are an information acquisition method and apparatus, a device, and a storage medium. The method includes: determining the first configuration information of a CSI report, where the first configuration information includes a CSI-RS resource associated with the CSI report and an SRS resource associated with the CSI report, the CSI-RS resource is configured for carrying a channel state information reference signal, and the SRS resource is configured for carrying a sounding reference signal; sending the first configuration information to a second communication node; receiving the CSI report fed back by the second communication node, where the CSI report is generated according to the measurement performed on the channel state information reference signal carried in the CSI-RS resource; and obtaining corresponding channel state information according to the CSI report.

A UE and a base station are disclosed. The UE may receive, from a base station, an indication of a configuration of an SS and a set of candidate DL-RSs associated with a plurality of CG-SDT resources. The base station may monitor for the UL data transmission from the UE corresponding to a CG-SDT occasion of the CG-SDT resources. The UE may measure a RSRP of each of the set of candidate DL-RSs associated with the CG-SDT resources. The UE may select an UL beam based on the measured RSRP of each of the set of candidate DL-RSs associated with the CG-SDT resources. The UE may transmit, to the base station via the selected UL beam, the UL data transmission over a CG-SDT occasion of the plurality of CG-SDT resources. The UE may monitor the SS for a response to the UL data transmission from the base station.

Methods, systems, and devices for wireless communications are described. In some examples, a wireless communications system may support group channel quality indicator (CQI) reporting. For example, a user equipment (UE) may receive, from a base station, signaling indicating a group of component carriers (CCs) and one or more subbands within the group of CCs. The UE may receive one or more reference signals within the one or more subbands and determine a group CQI index corresponding to the group of CCs based at least in part on the one or more reference signals. The UE may then transmit a report to the base station indicating the group CQI index and the base station may determine a CQI index for each of the one or more subbands based on the group CQI index.

The disclosure relates to a 5G or 6G communication system for supporting higher data transmission rates than 4G communication systems such as LTE systems. A method performed by a receiving apparatus in a wireless communication system is provided. The method includes receiving reference signals from a transmitting apparatus, estimating respective channel component values of the reference signals, determining whether at least one reference channel component value which is equal to or greater than a first threshold is present among the channel component values of the reference signals, selecting a candidate beam based on the at least one reference channel component value in case that the at least one reference channel component value is present, determining whether a value of signal quality of the first candidate beam is equal to or greater than a second threshold, and selecting the candidate beam as a final beam in case that the value of signal quality of the candidate beam is equal to or greater than the second threshold.