Channel estimation method and apparatus

A channel estimation method comprising:

• generating indication information for indicating M N-dimensional precoding vectors,
• wherein each precoding vector is applied to one of M frequency bands,
• wherein the M N-dimensional precoding vectors form a space-frequency matrix,
• wherein the space-frequency matrix is generated by performing a weighted combination on a plurality of space-frequency component matrices,
• wherein the space-frequency matrix is an X×Y space-frequency matrix, X and Y are one and the other of M and N, M≥1, N≥2, and both M and N are integers,
• wherein the space-frequency matrix is associated with one spatial stream of a plurality of spatial streams, and
• wherein quantities of frequency-domain component vectors associated with each of space-frequency matrices of different spatial streams of the plurality of spatial streams are the same;
• and
• sending the indication information.

A non-transitory computer-readable storage medium storing computer instructions, that when executed by at least one processor, cause the at least one processor to perform operations comprising:

• generating indication information for indicating M N-dimensional precoding vectors,
• wherein each precoding vector is applied to one of M frequency bands,
• wherein the M N-dimensional precoding vectors form a space-frequency matrix,
• wherein the space-frequency matrix is generated by performing a weighted combination on a plurality of space-frequency component matrices,
• wherein the space-frequency matrix is an X×Y space-frequency matrix, X and Y are one and the other of M and N, M≥1, N≥2, and both M and N are integers,
• wherein the space-frequency matrix is associated with one spatial stream of a plurality of spatial streams, and
• wherein quantities of frequency-domain component vectors associated with each of space-frequency matrices of different spatial streams of the plurality of spatial streams are the same;
• and
• sending the indication information.