Patent ID: 8599978

Claim:
An interference elimination method, comprising: obtaining, by an i th transmitter of a group transmitters, an interference vector of each user of one or more users, wherein: the interference vector of the k th user is H ki w im ; k, i, and m are positive integers, 1≦k≦K, k≠i, 1≦m≦L k , m is an index of the number of signal flows from the k th user, K is the number of users, L k is the number of the signal flows of the k th user, H ki is a channel matrix in a direction from the i th transmitter to the k th user, and w im is a pre-coding vector of the i th transmitter with the index of the number of the signal flows being m; obtaining at least L−N linear combinations for each user, wherein: the linear combinations include linear combinations of aligned interference vectors and linear combinations of N−L k interference vectors, N is the number of receiving antennas of the user, and L is a sum of the signal flows of all users; obtaining pre-coding vectors of all transmitters according to the linear combinations of all users; and sending signals pre-coded using the pre-coding vectors.