Methods, systems, and devices for wireless communication are described, including techniques for utilizing implicit or explicit signaling to indicate a cancellation of demodulation reference signal (DMRS) bundling. A first user equipment (UE) may perform DMRS bundling across physical sidelink channels transmitted to a second UE to enable the second UE to perform joint channel estimation. In some examples, based on a detected change, either at the first UE or the second UE, the first UE may signal to the second UE that the DMRS bundling is canceled. In some examples, the detected change may be a resource allocation change, a physical channel configuration change, a change in a quasi-colocation (QCL) relationship at the first UE, or a change in a transmission configuration indicator (TCI) state at the first UE. Additionally or alternatively, the first UE or the second UE may request the cancellation based on detected changes.

Apparatus, methods, and computer-readable media for facilitating phase jump estimation for SL DMRS bundling are disclosed herein. An example method includes receiving, from another device, first information at a first symbol of a first slot, the first slot including at least the first symbol and a first reference signal. The example method also includes receiving second information at a second symbol of a second slot, the second slot including at least the second symbol and a second reference signal, the first information and the second information being repetitions. The example method also includes generating a first reference signal copy based at least on the second reference signal and a phase jump between the first slot and the second slot. Additionally, the example method includes performing channel estimation across the first slot and the second slot based on an aggregation of the first reference signal and the first reference signal copy.

A terminal includes a reception unit configured to receive information associated with a signal transmitted to an apparatus other than the terminal, in MU-MIMO (MultiUser-Multiple Input Multiple Output) and a reference signal from a base station, a control unit configured to estimate interference from the signal transmitted to the apparatus other than the terminal to a signal transmitted to the terminal, based on the information associated with the signal transmitted to the apparatus other than the terminal and the reference signal, and a communication unit configured to suppress the interference and receive a data signal from the base station.

A terminal according to an aspect of the present disclosure includes: a control section that determines a priority of a channel state information (CSI) report based on at least one of a type of downlink control information triggering the CSI report, a parameter used for transmission of the downlink control information, or presence or absence of uplink (UL) data allocated to an uplink shared channel used for transmission of the CSI report; and a transmitting section that transmits, in a case where transmission of the CSI report and transmission of another UL signal overlap with each other, one of the CSI report and the another UL signal based on the priority.

There is provided a method of receiving a transmitted signal over a time-varying channel. The method includes: obtaining a received symbol signal in frequency domain based on the transmitted signal; performing a first channel estimation based on the received symbol signal to obtain a plurality of first estimated BEM coefficients; performing a first equalization based on the received symbol signal and the plurality of first estimated BEM coefficients to obtain a plurality of first detected source symbols; and performing one or more rounds of a second channel estimation and a second equalization. Each round includes: performing the second channel estimation based on the received symbol signal and a plurality of detected source symbols to obtain a plurality of second estimated BEM coefficients; performing interference removal based on the received symbol signal, the plurality of detected source symbols and the plurality of second estimated BEM coefficients to obtain an interference reduced symbol signal infrequency domain; and performing the second equalization based on the interference reduced symbol signal and the plurality of second estimated BEM coefficients to obtain a plurality of second detected source symbols. There is also provided a corresponding receiver, and a system for wireless communication over a time-varying channel including the receiver.

Disclosed herein is a method for transmitting, by a terminal, a sounding reference signal (SRS). The terminal receives a grant for uplink multiple subframes from a base station. The terminal determines a first subframe for an SRS transmission of the terminal among the uplink multiple subframes on the basis of SRS transmission position information received from the base station. Further, the terminal transmits the SRS in the first subframe.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of a repetition factor associated with a message or an indication that demodulation reference signal (DMRS) bundling is to be applied for the message for joint channel estimation. The UE may communicate a phase tracking reference signal (PTRS) associated with the message based at least in part on receiving the indication of the repetition factor or the indication that DMRS bundling is to be applied. Numerous other aspects are described.

Methods, systems, and devices for wireless communications are described. A transmitting device may select a scrambling sequence to use per symbol to reduce variance in a non-linearity parameter for a power amplifier (PA) output between a data symbol and a pilot symbol based on a PA model for at least one pilot symbol or one or more parameters of the model. The receiving device may indicate a capability to blindly estimate the scrambling sequence the transmitting device selected to the transmitting device. If the transmitting device does not receive the capability message from the receiving device or if the capability message indicates the receiving device is not capable of blind estimation, the transmitting device may indicate the selected scrambling sequence to the receiving device. Otherwise, the transmitting device may not indicate the selected scrambling sequence to the receiving device, and the receiving device may blindly estimate the scrambling sequence.

In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE measures, at a first time point, a first set of reference signals to determine a first set of values corresponding to a set of CSI parameters. The UE determines value differences between the first set of values and a set of reference values corresponding to the set of CSI parameters. The UE sends a first CSI report including variation indicators indicating the value differences.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine a status of a repetition procedure associated with a radio resource control (RRC) connection request message of a four-step random access channel (RACH) procedure. The UE may invoke an activity state of an RRC connection setup message monitoring procedure based at least in part on the status of the repetition procedure. Numerous other aspects are described.