| 摘要 |
Embodiments of the present invention provide a channel information communications method and apparatus, so as to implement optimization of channel parameters in channel transmission. A method for measuring and feeding back channel information and a corresponding apparatus are provided. A first network device receives a reference signal, measures the reference signal to obtain a measurement result, and selects a first codebook from a first codebook set according to the measurement result; where the first codebook set includes at least two first codebooks, a sub-vector W x of each first codebook is formed by a zero vector and a non-zero vector, and the vectors forming the W x correspond to different groups of antenna ports; in each first codebook, different sub-vectors W x are formed according to a same structure or different structures; formation according to the same structure is: for different sub-vectors W x (1) and W x (2), a location of a non-zero vector in the W x (1) is the same as a location of a non-zero vector in the W x (2); and formation according to different structures is: for different sub-vectors W x (1) and W x (2), a location of a non-zero vector in the W x (1) is different from a location of a non-zero vector in the W x (2); and the first network device sends a codebook index to a second network device, where the codebook index corresponds to the first codebook selected from the first codebook set. |
