| 摘要 |
The present invention provides a delay estimation method for a multiple input multiple output communications system, including: calculating, by a receiver, a channel response matrix of a Multiple input multiple output MIMO communications system, where there are n transmit channels and m receive channels in the MIMO communications system, n‰¥2, m‰¥2, and the channel response matrix includes channel responses of n*m sub-channels; calculating, by the receiver, an integer delay, relative to a reference sub-channel, of each of the n*m sub-channels according to the channel response matrix, where the reference sub-channel is any sub-channel in the n*m sub-channels; calculating, by the receiver, fraction delays of the n*m sub-channels according to the channel response matrix; and separating out, by the receiver, delays of the m receive channels according to delays of the n*m sub-channels. The present invention further provides an estimation apparatus and system, which can estimate an integer delay and a fraction delay of each channel in the MIMO communications system online in real time, and achieve high measurement precision. |
