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Low Complexity Non-Iterative Coordinated Beamforming in 2-User Broadcast Channels

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3 Author(s)
Ki-Hong Park ; Sch. of Electr. Eng., Korea Univ., Seoul, South Korea ; Young-Chai Ko ; Alouini, M.S.

We propose a new non-iterative coordinated beamforming scheme to obtain full multiplexing gain in 2-user MIMO systems. In order to find the beamforming and combining matrices, we solve a generalized eigenvector problem and describe how to find generalized eigenvectors according to the Gaussian broadcast channels. Selected simulation results show that the proposed method yields the same sum-rate performance as the iterative coordinated beamforming method, while maintaining lower complexity by non-iterative computation of the beamforming and combining matrices. We also show that the proposed method can easily exploit selective gain by choosing the best combination of generalized eigenvectors.

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Communications, IEEE Transactions on  (Volume:58 ,  Issue: 10 )