Subband-based analog beamforming for uplink

A wireless transmit/receive unit (WTRU) comprising:

• a transceiver;
• and
• a processor, wherein the transceiver and the processor are configured to:
• receive, from a base station, configuration information indicating sounding reference signal (SRS) resource information including a set of subbands, a set of simultaneous beams, and correspondence information indicating correspondence between the set of simultaneous beams and the set of subbands, wherein a number of beams in the set of simultaneous beams is less than or equal to a maximum number of simultaneous beams supported by the WTRU;
• transmit, to the base station, at least one SRS using the set of subbands and the set of simultaneous beams in accordance with the indicated correspondence information;
• receive, from the base station, a grant indicating a plurality of resource block groups (RBGs);
• determine a mapping between the set of simultaneous beams and the plurality of RBGs;
• and
• transmit, to the base station, an uplink signal using the indicated RBGs and the set of simultaneous beams in accordance with the mapping.