The invention discloses a limited-feedback
precoding interference-suppression method in a multi-antenna multi-
cell system. The transmitting terminal has a
base station, the receiving terminal has a mobile user, and both the
base station and the user are equipped with an identical
codebook collection; at the receiving terminal, the mobile user firstly measures the interference channel between the mobile user-self and the co-frequency
base station of the adjacent
cell, then qualifies the interference channel by using the
codebook collection, and feedbacks the qualified data to the base
station of the adjacent
cell; at the transmitting terminal, the base
station of the adjacent cell uses the feedback data to perform the
precoding processing, generates a percoded matrix, and then suppresses the interference to other cells caused by the adjacent cell; when all the base
station in the multi-
cell system use the same
processing method, the co-frequency interference in the
system will be effectively suppressed. The invention uses the
precoding technology of the receiving terminal to suppress the interference to other adjacent cells caused by the base station, at the same time, uses the limited
codebook collection to realize the limited
information feedback, achieving the goals of suppressing interference, enhancing
system performance and increasing
system capacity.