Antenna port compatibility signaling

An apparatus for wireless communication at a user equipment (UE) having a plurality of antenna ports, comprising:

• a processor;
• memory coupled to the processor;
• and
• instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:
• identify, among the plurality of antenna ports, a number of antenna ports that are available for coincident use by the UE;
• transmit to a base station, based at least in part on the identifying, an indication of the number of antenna ports available for coincident use;
• and
• transmit, based at least in part on the indication, a set of sounding reference signals (SRSs) within a same symbol period, wherein each SRS of the set of SRSs is transmitted via a respective antenna port of a set of antenna ports, and wherein the number of antenna ports available for coincident use is greater than or equal to a number of antenna ports included in the set of antenna ports.

An apparatus for wireless communication at a user equipment (UE) having a plurality of antenna ports, comprising:

• means for identifying, among the plurality of antenna ports, a number of antenna ports that are available for coincident use by the UE;
• means for transmitting to a base station, based at least in part on the identifying, an indication of the number of antenna ports available for coincident use;
• and
• means for transmitting, based at least in part on the indication, a set of sounding reference signals (SRSs) within a same symbol period, wherein each SRS of the set of SRSs is transmitted via a respective antenna port of a set of antenna ports, and wherein the number of antenna ports available for coincident use is greater than or equal to a number of antenna ports included in the set of antenna ports.

A non-transitory computer readable medium storing code for wireless communication at a user equipment (UE) having a plurality of antenna ports, the code comprising instructions executable by a processor to:

• identify, among the plurality of antenna ports, a number of antenna ports that are available for coincident use by the UE;
• transmit to a base station, based at least in part on the identifying, an indication of the number of antenna ports available for coincident use;
• and
• transmit, based at least in part on the indication, a set of sounding reference signals (SRSs) within a same symbol period, wherein each SRS of the set of SRSs is transmitted via a respective antenna port of a set of antenna ports, and wherein the number of antenna ports available for coincident use is greater than or equal to a number of antenna ports included in the set of antenna ports.