Abstract:

An eigenvalue based coordinated beamforming algorithm is proposed to mitigate the intercell interference aroused by beam collision in beamforming systems. Assuming the scheduling of users has been done in each cell, the users suffering serious interference require their serving cell cooperatively working with their strongest aggressor. The two cells calculate the beamforming vectors for the subcarriers adopted by this user together. With this coordinated multipoint technique, the intercell interference is mitigated and the sum of achievable rate of users adopt the same frequency is maximized. Compared with the classical independent beamforming techniques, the proposed algorithm can greatly improve system performance.

Key words: coordinated multipoint, intercell interference, coordinated beamforming