Multi-transmission artificial noise (AN) cancellation

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

• receiving channel state information (CSI) of a first channel between the first wireless node and an antenna of a user equipment (UE);
• receiving a first filter coefficient associated with the antenna of the UE;
• receiving an index value indicative of an assigned position of the first wireless node in a set of wireless nodes;
• and
• transmitting, to the UE, a first transmission comprising a first artificial noise (AN) signal combined with a first data signal, wherein the first AN signal is generated based on the CSI of the first channel, the first filter coefficient, and the index value.

An apparatus of a user equipment (UE) for wireless communications, comprising:

• at least one memory;
• and
• at least one processor coupled to the at least one memory and configured to:
• receive, from a first wireless node via a first channel, a first transmission comprising a first artificial noise (AN) signal combined with a first data signal, wherein the first AN signal is generated based on channel state information (CSI) of the first channel;
• receive, from a second wireless node via a second channel, a second transmission comprising a second AN signal combined with a second data signal, wherein the second AN signal is generated based on CSI of the second channel and is different from the first AN signal, and wherein the first AN signal and the second AN signal are generated using a same pseudo-random noise and a same rotation angle;
• and
• determine a data message based on the first transmission and the second transmission.

An apparatus of a wireless node for wireless communications, comprising:

• at least one memory;
• and
• at least one processor coupled to the at least one memory and configured to:
• receive channel state information (CSI) of a first channel between the wireless node and an antenna of a user equipment (UE);
• receive a first filter coefficient associated with the antenna of the UE;
• receive an index value indicative of an assigned position of the wireless node in a set of wireless nodes;
• and
• transmit, to the UE, a first transmission comprising a first artificial noise (AN) signal combined with a first data signal, wherein the first AN signal is generated based on the CSI of the first channel, the first filter coefficient, and the index value.