Method for uplink sounding reference signal precoder selection for interference suppression

Abstract

This disclosure provides methods for selecting a precoder for uplink sounding reference signal (SRS), useful in multi-transmission and reception point (multi-TRP) cases. A user equipment (UE) device receives (450), from at least a first network entity, a first channel state information reference signal (CSI-RS), and also receives (455), from a second network entity, a second CSI-RS. The UE device then receives (430), from the first network entity, for example, control signaling indicating at least one SRS resource set associated with the first CSI-RS or the second CSI-RS. The UE device transmits (470) precoded SRS resources based on the received SRS resource set and a precoder computed based on the first CSI-RS and the second CSI-RS. In some cases, the UE device determines (460) the precoder based on the first CSI-RS and the second CSI-RS such that the precoded SRS resources suppress interference with signals received at a third network entity.

Images