Transmit diversity across orbital angular momentum modes

A method for wireless communications at a first device, comprising:

• receiving, from a second device, an indication of the transmit diversity scheme associated with communications between the first device and the second device, the transmit diversity scheme indicating a plurality of orbital angular momentum modes for one or more signals from the first device;
• monitoring for the one or more signals from the first device based at least in part on the transmit diversity scheme;
• and
• transmitting a feedback message to the second device based at least in part on the monitoring, the feedback message indicating one or more signal strength measurements for one or more orbital angular momentum modes of the plurality of orbital angular momentum modes, the one or more signal strength measurements associated with the one or more signals.

An apparatus for wireless communications at a first device, comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• select, from a plurality of orbital angular momentum modes, a subset of orbital angular momentum modes for a transmit diversity scheme associated with communications between the first device and a second device, the subset comprising a first orbital angular momentum mode of the plurality of orbital angular momentum modes and a second orbital angular momentum mode of the plurality of orbital angular momentum modes;
• transmit, to the second device, an indication of the transmit diversity scheme associated with communications between the first device and the second device, the transmit diversity scheme indicating the subset of orbital angular momentum modes;
• and
• transmit, based at least in part on the transmit diversity scheme, a data packet to the second device using a set of transmitter circles of the first device, the set of transmitter circles corresponding to both the first orbital angular momentum mode and the second orbital angular momentum mode.

An apparatus for wireless communications at a first device, comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• receive, from a second device, an indication of the transmit diversity scheme associated with communications between the first device and the second device, the transmit diversity scheme indicating a plurality of orbital angular momentum modes for one or more signals from the first device;
• monitor for the one or more signals from the first device based at least in part on the transmit diversity scheme;
• and
• transmit a feedback message to the second device based at least in part on the monitoring, the feedback message indicating one or more signal strength measurements for one or more orbital angular momentum modes of the plurality of orbital angular momentum modes, the one or more signal strength measurements 16 associated with the one or more signals.