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In this paper, 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...
It is difficult for users in multiuser multiple-input multiple-output (MU-MIMO) systems to obtain co-channel interference (CCI) statistics without user cooperation. We propose a technique through which each user can effectively obtain the statistics of the interference that it experiences in a precoded MU-MIMO system. This allows true maximum-likelihood detection to be performed in place of minimum-distance...
In this paper, we introduce a new zero-forcing beamforming (ZFBF) transmission scheme for multi-user MIMO Gaussian channel with finite rate feedback. With this transmission scheme, the base station adaptively utilizes transmit antennas according to the channel status and the number of active users to control the multiuser interference. We show through selected numerical results that our proposed scheme...
In cellular wireless communications standard bodies (e.g., 3GPP, 3GPP2), multiple-input multiple-output (MIMO) transmission techniques have been one of long lasting issues for its standardization. Recently, 3GPP launched multi-carrier based beyond 3G study item (i.e., long-term evolution or LTE) to compete with other solutions such as IEEE 802.16e/20. In LTE or other compatible systems, feedback overhead...
Multiple-input multiple-output (MIMO) transmission techniques improve spectral efficiency and/or reliability over wireless communications link. Spatial division multiple access (SDMA, or called multi-user MIMO) is a potential solution to achieve high system throughput among various MIMO approaches. However, rank deficiency of the varying wireless channel degrades the throughput performance of SDMA...
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