Reference signal sequence indication in orbital angular momentum (oam) communication systems

An apparatus configured for wireless communication, comprising:

• a processor;
• a plurality of antenna elements;
• a transceiver coupled to the processor and to plurality of antenna elements;
• and
• a memory coupled to the processor,
• wherein the processor and the memory are configured to:
• transmit, via the transceiver, information indicative of a sequence of orbital angular momentum (OAM) modes to be used to transmit synchronization signals, including a first OAM mode and a second OAM mode;
• transmit, via the transceiver and a first antenna element of the plurality of antenna elements, a first reference signal on the first OAM mode using first resources in accordance with the sequence;
• transmit, via the transceiver and the first antenna element of the plurality of antenna elements, a second reference signal on the second OAM mode using second resources in accordance with the sequence.

A method for wireless communication, comprising:

• receiving, via a transceiver and a first antenna element of a plurality of antenna elements, a first reference signal on a first orbital angular momentum (OAM) mode using first resources;
• identifying, based on the first OAM mode used to receive the first reference signal, a second OAM mode to be used to receive a second reference signal associated with second resources;
• and
• receiving, via the transceiver and the first antenna element of the plurality of antenna elements, the second reference signal on the second OAM mode using the second resources.