The embodiments herein related to a method in a network node, a network node, a method in a user equipment and a user equipment for handling base sequences in a communications network. The network node is configured to communicate with a first user equipment. The network node comprises information about a default base sequence and an alternative base sequence. The network node determines, for the first user equipment, that the alternative base sequence should replace the default base sequence. The network node sends information about the determined alternative base sequence to the first user equipment.

A transmission device that improves data reception quality includes: a weighting synthesizer that generates a first precoded signal and a second precoded signal from a first baseband signal and a second baseband signal, respectively; a phase changer that applies a phase change of i×Δλ to the second precoded signal; an inserter that inserts a pilot signal into the second precoded signal applied with the phase change; and a phase changer that applies a phase change to the second precoded signal applied with the phase change and inserted with the pilot signal. Δλ satisfies π/2 radians<Δλ<π radians or π radians<Δλ<3π/2 radians. Each of the first baseband signal and the second baseband signal is modulated via a modulation scheme of quadrature amplitude modulation (QAM) using non-uniform mapping.

A UE determines a first DCCH resource candidate in a first CORESET on a carrier, the first DCCH resource candidate including a first set of RBs. The UE also determines a first sequence of DMRSs that are mapped, starting at a reference point, to RBs in a predetermined range within the carrier in a frequency domain, the predetermined range containing the first DCCH resource candidate in the frequency domain. The UE further determines a first reference location of the first set of RBs. The UE determines, based on the first reference location, a first set of DMRSs from the first sequence of DMRSs, the first set of DMRSs being mapped to the first set of RBs. The UE obtains a channel estimation based on the first set of DMRSs; and The UE performs blind decoding of the first DCCH resource candidate based on the channel estimation.

A user terminal supporting carrier aggregation (CA) and an operating method thereof are provided. The operating method includes receiving indication information regarding a phase tracking reference signal (PTRS) component carrier (CC) group from a base station; determining whether a phase noise characteristic of the user terminal is the same with respect to CCs included in the PTRS CC group, based at least in part on the indication information; requesting the base station to transmit at least one PTRS using at least one CC included in the PTRS CC group; and receiving the at least one PTRS from the base station using the at least one CC.

A method of communication performed by a first apparatus with respect to a second apparatus in a wireless local area network (WLAN) system including the first apparatus and the second apparatus, includes: transmitting a null data packet (NDP) based on a first protocol standard to the second apparatus; receiving a first feedback frame including information on an estimated first channel and phase information from the second apparatus in response to the NDP; performing beamforming with respect to the second apparatus by reflecting the phase information in the information on the estimated first channel; and transmitting a beamformed physical layer protocol data unit (PPDU) to the second apparatus.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, a configuration for a time domain (TD) control channel element (CCE) bundle that includes at least one TD CCE for single carrier waveforms, wherein a phase continuity is assumed for a duration of the TD CCE bundle. The UE may perform a channel estimation using the TD CCE bundle based at least in part on the phase continuity for the duration of the TD CCE bundle. Numerous other aspects are described.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine an actual power delay profile (PDP) associated with a channel between the UE and a base station, wherein the actual PDP indicates an averaged power level of the channel over a period of time. The UE may determine whether a channel estimation mode switching event is satisfied. The UE may switch, based at least in part on the channel estimation mode switching event being satisfied, between a first channel estimation mode based at least in part on the actual PDP and a second channel estimation mode based at least in part on a template PDP. Numerous other aspects are described.

A repetition unit (212) performs a repetition for mapping a data signal and a demodulation reference signal (DMRS) repeatedly at a symbol level over a plurality of subframes. A signal allocation unit (213) maps, in the a plurality of subframes, the repeated DMRS to symbols other than symbols corresponding to an SRS resource candidate, which is a candidate for a resource to which a sounding reference signal (SRS) to be used to measure an uplink received signal quality is to be mapped. A transmission unit (216) transmits an uplink signal (PUSCH) including the DMRS and the data signal over the a plurality of subframes.

In some implementations, a method of wireless communication includes selecting, at a user equipment (UE), one or more control resource sets (CORESETs) from a plurality of CORESETs corresponding to the UE. At least one of the plurality of CORESETs corresponds to multiple active transmission configuration indicator (TCI) states. The method further includes performing a radio link monitoring (RLM) operation, a beam failure detection (BFD) operation, or both, based on one or more reference signals (RSs) corresponding to active TCI states associated with the one or more selected CORESETs.

Apparatuses, methods, and systems are disclosed for power headroom report generation. One method includes aggregating multiple serving cells. The method includes determining that a power headroom report is triggered. The method includes determining that an uplink resource for a new transmission on a serving cell of the multiple serving cells is allocated at a first time after the power headroom report is triggered. The method includes determining a power headroom value for each serving cell of the multiple serving cells being activated based on information received prior to and including a predetermined time before the start of the uplink resource at the first time. The method includes generating a power headroom report medium access control control element including at least the power headroom value for each serving cell of the multiple serving cells being activated.