Communication schemes for small cyclic delay diversity reference signals

A method for wireless communication, comprising:

• receiving a first channel state information (CSI) reference signal (CSI-RS) of a plurality of CSI-RSs over a first set of resources corresponding to a first beam and a first delay offset;
• determining a first CSI parameter based at least in part on the first CSI-RS;
• and
• transmitting, to the base station, a feedback message based at least in part on the determined first CSI parameter.

An apparatus for wireless communication, comprising:

• a processor;
• memory in electronic communication with the processor, and
• instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:
• receive, from a base station, a control message comprising at least one channel state information (CSI) configuration parameter;
• identify, by a user equipment (UE), a time offset between a plurality of virtual antennas of the base station based at least in part on the at least one CSI configuration parameter,
• perform, by the UE, measurements of a plurality of CSI reference signals (CSI-RSs) associated with the plurality of virtual antennas of the base station;
• and
• transmit, to the base station, a feedback message based at least in part on the identified time offset and the measurements of the plurality of CSI-RSs.

An apparatus for wireless communication, comprising:

• a processor,
• memory in electronic communication with the processor;
• and
• instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:
• receive a first channel state information (CSI) reference signal (CSI-RS) of a plurality of CSI-RSs over a first set of resources corresponding to a first beam and a first delay offset;
• determine a first CSI parameter based at least in part on the first CSI-RS;
• and
• transmit, to the base station, a feedback message based at least in part on the determined first CSI parameter.

An apparatus for wireless communication, comprising:

• a processor;
• memory in electronic communication with the processor;
• and
• instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:
• transmit, by a base station, a control message comprising at least one channel state information (CSI) configuration parameter and a request to report a time offset between a plurality of virtual antennas of the base station and measurements of a plurality of CSI reference signals (CSI-RSs) associated with the plurality of virtual antennas of the base station;
• and
• receive, from a user equipment (UE) and in response to the request, a feedback message based at least in part on the time offset and the measurements of the plurality of CSI-RSs.

An apparatus for wireless communication, comprising:

• a processor;
• memory in electronic communication with the processor;
• and
• instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:
• transmit, to a user equipment (UE), a first channel state information (CSI) reference signal (CSI-RS) of a plurality of CSI-RSs over a first set of resources corresponding to a first beam and a first delay offset;
• and
• receive, from the UE, a feedback message that includes a first CSI parameter, wherein the first CSI parameter is based at least in part on the first CSI-RS.