Multi-antenna channel measurement method and apparatus

Embodiments of the present invention provide a multi-antenna channel measurement method, an apparatus, a communication system and a terminal, wherein a base station transmits a first channel state information reference signal (CSI-RS) and a second CSI-RS to a terminal, the first CSI-RS and the second CSI-RS are respectively transmitted over antenna oscillators of orthogonal dimension; the base station receives a first CSI measurement result fed back by the terminal and with respect to the first CSI-RS and the second CSI-RS; the base station transmits a third CSI-RS to the terminal according to the first CSI measurement result and the third CSI-RS carries out precoding according to the first CSI measurement result; and the base station receives a third CSI measurement result fed back by the terminal and with respect to the third CSI-RS. Therefore, the object of lowering the computing complexity at a channel measurement terminal side and reducing resources occupied by channel measurement feedback under multiple antenna ports is achieved.