Not sure that this is new. It is known that channel capacity can be scaled up linearly with the number of receive/transmit antennas by properly de-mixing the signal at the receiver (or pre-coding it properly at the sender).
What these people call "vortex wave", is just precoding/decoding done in a fixed way using fixed antennas. But with non-line-of sight channels and moving sender/receiver you will need dynamic MIMO coding anyways. This is already implemented in LTE (2 antennas in the handset, 4 at the base station, AFAIR).
This is apparently something new, not sure what though - it's not something I ever learned about with photons.