| 摘要 |
The disclosure provides a method for constructing a three-dimensional (3D) multi-input multi-output (MIMO) pre-coding matrix, a method for feeding back index values of a 3D MIMO pre-coding matrix and related communication devices. The method for constructing a 3D MIMO pre-coding matrix comprises: constructing a first component matrix in a block diagonal form, wherein a diagonal sub-matrix of the first component matrix is a 3D beamforming sub-precoder for a two-dimensional (2D) antenna array; constructing a second component matrix which comprises phase weighting factors as matrix elements, wherein the phase weighting factors characterize coherent combination of signals from the 2D antenna array; and constructing the 3D MIMO pre-coding matrix according to the constructed first and second component matrixes. The method for feeding back index values of a 3D MIMO pre-coding matrix comprises: estimating a MIMO channel; and according to a result of the channel estimation, selecting and feeding back a first index value, a second index value and a third index value. |
