User equipment, base station, and method for enhancing features of uplink reference signals

摘要

The invention provides a user equipment (UE) for transmitting a physical uplink shared channel (PUSCH) and a demodulation (DM) reference signal (RS) associated with transmission of the PUSCH in a communication system, the UE comprising:
a receiver configured to receive a downlink control information (DCI) including a plurality of information elements (IEs) over physical downlink control channel (PDCCH) based on a UE identifier (ID) corresponding to the UE, where the plurality of IEs include a resource allocation (RA) and information indicating a combination of a cyclic shift (CS) for the DM RS and an orthogonal cover code (OCC), and identify the CS for the DM RS and the OCC using the information indicating the combination of the CS for the DM RS and the OCC; and
a controller configured to acquire a DM RS sequence based on the identified CS, the identified OCC, and a constant amplitude zero auto-correlation (CAZAC)-based sequence, controlling an inverse fourier transform (IFT) operation performed based on the DM RS sequence and the RA to generate the DMRS, and control a transmitter configured to transmit the DMRS associated with the PUSCH. The invention further provides a base station (BS) and methods to operate the UE and BS.