Channel state information feedback in wireless communication

A method for wireless communication, comprising:

• determining, by a wireless device, for a layer in R layers, a subset of coefficients from a plurality of coefficients,
• wherein R is a rank value and the subset of coefficients comprises less than or equal to K0 non-zero coefficients;
• and
• generating, by the wireless device, a channel state information (CSI) feedback report based on a first plurality of L basis vectors, a second plurality of M basis vectors and the subset of coefficients, wherein the first plurality of L basis vectors, the second plurality of M basis vectors and the subset of coefficients indicate information regarding a precoding vector,
• wherein M=ceil(pN3), wherein p and N3 are based on one or more network configured parameters, and wherein L and M are integers;
• and
• transmitting, by the wireless device, the CSI feedback report to a base station.

A method for wireless communication, comprising:

• receiving, by a wireless node, a channel state information (CSI) feedback report from a wireless device,
• wherein the CSI feedback report is based on a first plurality of L basis vectors, a second plurality of M basis vectors and a subset of coefficients, wherein the first plurality of L basis vectors, the second plurality of M basis vectors and the subset of coefficients indicate information regarding a precoding vector,
• wherein the subset of coefficients is determined from a plurality of coefficients for a layer in R layers, wherein R is a rank value and the subset of coefficients comprises less than or equal to K0 non-zero coefficients,
• wherein M=ceil(pN3), wherein p and N3 are based on one or more network configured parameters, and wherein L and M are integers;
• performing, by the wireless node, a subsequent communication with the wireless device based on the CSI feedback report.

A device for wireless communication, comprising at least one processor that is configured to:

• determine, for a layer in R layers, a subset of coefficients from a plurality of coefficients,
• wherein R is a rank value and the subset of coefficients comprises less than or equal to K0 non-zero coefficients;
• and
• generate a channel state information (CSI) feedback report based on a first plurality of L basis vectors, a second plurality of M basis vectors and the subset of coefficients, wherein the first plurality of L basis vectors, the second plurality of M basis vectors and the subset of coefficients indicate information regarding a precoding vector,
• wherein M=ceil(pN3), wherein p and N3 are based on one or more network configured parameters, and wherein L and M are integers;
• and
• transmit the CSI feedback report to a base station.

A device for wireless communication, comprising at least one processor that is configured to:

• receive a channel state information (CSI) feedback report from a wireless device,
• wherein the CSI feedback report is based on a first plurality of L basis vectors, a second plurality of M basis vectors and a subset of coefficients, wherein the first plurality of L basis vectors, the second plurality of M basis vectors and the subset of coefficients indicate information regarding a precoding vector,
• wherein the subset of coefficients is determined from a plurality of coefficients for a layer in R layers, wherein R is a rank value and the subset of coefficients comprises less than or equal to K0 non-zero coefficients,
• wherein M=ceil(pN3), wherein p and N3 are based on one or more network configured parameters, and wherein L and M are integers;
• perform a subsequent communication with the wireless device based on the CSI feedback report.