Information feedback method, user equipment, and network device

A user equipment (UE), comprising:

• a processor configured to determine a codebook of CSI of the UE at each transport layer, wherein the codebook of the CSI at each transport layer of the UE is:
• W=W1×W2, wherein
• W is the codebook of the CSI at each transport layer of the UE, W1 is a level-1 codebook, W1=[b1 b2 . . . bK], bi in W1 represents a codeword, K is a quantity of columns of W1 and K is a positive integer greater than or equal to 1, W2 is a level-2 codebook, W2 is represented as W2=[X1 X2 . . . XK]T, an element Xi in W2 is a weighting coefficient corresponding to bi in W1, and i is an integer greater than or equal to 1 and less than or equal to K;
• the processor is further configured to determine a quantity Ni of bits occupied by a quantized value of an ith element in W2, wherein quantized values of at least two elements in W2 occupy different quantities of bits;
• and
• a transmitter, configured to feed back the quantized value of the ith element to a network device based on Ni.

A computer program product comprising a non-transitory computer-readable medium storing computer executable instructions, wherein the instructions comprise:

• instructions for determining a codebook of CSI at each transport layer of user equipment (UE), wherein the codebook of the CSI at each transport layer of the UE is:
• W=W1×W2, wherein
• W is the codebook of the CSI at each transport layer of the UE, W1 is a level-1 codebook, W1=[b1 b2 . . . bK], bi and W1 represents a codeword, K is a quantity of columns of W1, K is a positive integer greater than or equal to 1, W2 is a level-2 codebook, W2 is represented as W2=[X1 X2 . . . XK]T, an element Xi in W2 is a weighting coefficient corresponding to bi in W1, and i is an integer greater than or equal to 1 and less than or equal to K;
• instructions for determining a quantity Ni of bits occupied by a quantized value of an ith element in W2, wherein quantized values of at least two elements in W2 occupy different quantities of bits;
• and
• instructions for feeding back the quantized value of the ith element to a network device based on Ni.