| 摘要 |
Provided are a channel estimation method, apparatus and system. The method comprises: a receiving end respectively receiving a first channel estimation sequence sent by a first sending unit of a sending end and a second channel estimation sequence sent by a second sending unit via two receiving units. Since the second channel estimation sequence is a sequence which is orthogonal to the first channel estimation sequence and of which an autocorrelation function is an impulse function, when a channel is estimated, an autocorrelated signal of the first channel estimation sequence is an impulse signal, and an autocorrelated signal of the second channel estimation sequence is also an impulse signal, and mutual convolution is performed on the first channel estimation sequence and the second channel estimation sequence to obtain zero, so that 2 x 2 MIMO channels can be accurately estimated. Since the first channel estimation sequence is a channel estimation sequence in an IEEE 802.11ad protocol, the storage overheads of a sending unit does not need to be added additionally for the second channel estimation sequence obtained therefrom. |
