Method, system, and device for transmitting coding instruction information and for determining pre-coding matrix

A UE, comprising:

• a processor configured to determine a channel of each antenna port to the UE according to a pilot symbol transmitted by a network side;
• determine a pre-coding matrix which is equal to a matrix as a function of a first component pre-coding matrix and a second component pre-coding matrix according to the determined channel, the first component pre-coding matrix is a block diagonal matrix with sub-matrixes on the diagonal being a Kronecker product of two matrixes, and the second component pre-coding matrix is composed of weighted column selection vectors, elements of the weighted column selection vector are zeros other than P non-zero elements with P being a positive integer;
• determine a first pre-coding indicator and a second pre-coding indicator which are corresponding to the pre-coding matrix according to the first component pre-coding matrix and the second component pre-coding matrix;
• and
• a transceiver configured to transmit the first pre-coding indicator and the second pre-coding indicator to the network side, and receive data preprocessed using the pre-coding matrix from the network-side.

A network-side device, comprising a transceiver and a processor;

• wherein:
• the transceiver is configured to receive a first pre-coding indicator and a second pre-coding indicator from a UE;
• the processor configured to determine a pre-coding matrix from the first pre-coding indicator and the second pre-coding indicator, and preprocess data to be transmitted to the UE using the pre-coding matrix;
• and
• the transceiver is further configured to transmit the data preprocessed using the pre-coding matrix to the UE;
• wherein the pre-coding matrix is equal to a matrix as a function of a first component pre-coding matrix and a second component pre-coding matrix, the first component pre-coding matrix is a block diagonal matrix with sub-matrixes on the diagonal being a Kronecker product of two matrixes, and the second component pre-coding matrix is composed of weighted column selection vectors, elements of the weighted column selection vector are zeros other than P non-zero elements with P being a positive integer.