Methods and apparatuses for port index signaling for non-precoder matrix indicator (pmi) channel state information (csi) feedback

A method for a wireless device (WD), the method comprising:

• receiving at least one port indication from a network node (16), the at least one port indication being received in one of a rank-nested and a non-rank-nested manner;
• and
• generating channel state information, CSI, feedback based on the at least one port indication.

A wireless device (WD) configured to communicate with a network node, the WD comprising:

• a radio interface configured to receive at least one port indication from a network node, the at least one port indication being received in one of a rank-nested and a non-rank-nested manner;
• and
• processing circuitry configured to generate channel state information, CSI, feedback based on the at least one port indication.

A method for a network node, the method comprising:

• generating at least one port indication in one of a rank-nested and a non-rank-nested manner;
• and
• signalling the at least one port indication in the one of the rank-nested and the non-rank-nested manner.