摘要 |
A method implemented in a base station used in a wireless communications system is disclosed. The method comprises having 1-layer, 2-layer, 3-layer, and 4-layer codebooks for 4 transmit antenna (4TX) transmission, each codebook including a plurality of precoding matrices, precoding data with one of the plurality of precoding matrices, and transmitting, to a user equipment, the precoded data, wherein each of the 1-layer and 2-layer codebooks comprises a first codebook and a second codebook, and wherein each precoding matrix in the first codebook comprises a first index and a second index. Other apparatuses, systems, and methods also are disclosed. |
申请人 |
NEC LABORATORIES AMERICA, INC. |
发明人 |
PRASAD, NARAYAN;YUE, GUOSEN;KHOJASTEPOUR, MOHAMMAD;RANGARAJAN, SAMPATH |