Scheme and device for calibrating antennae among base stations in cooperative multi-point system and base station

The invention discloses a scheme for calibrating antennae among base stations in a cooperative multi-point (CoMP) system, a device for realizing the calibrating scheme and a base station which comprises the calibrating device. The scheme comprises the following steps that: calibration reference antennae are selected by M base stations in a cluster respectively, and the antenna of user equipment (UE) with higher signal quality is selected; the base stations detect 1*M uplink channels and transmit reference signals through the reference antennae; the UE detects and feeds back M*1 downlink channels, and the uplink-to-downlink calibration ratio coefficients of the reference antennae are acquired; and the base stations perform self-calibration inside, and the calibrating work among the base stations is finished by multiplying the acquired ratio coefficients. By the scheme, the calibration among the base stations is realized preferably, and the reciprocity of the uplink and the downlink in a time division duplex (TDD) system is ensured.