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In this paper, a closed-form expression for Bit Error rate (BER) of a Multiple-Input Multiple-Output (MIMO) system employing the Minimum Mean Square Error MMSE channel estimation method is derived. The numerical results show that when the Channel State Information (CSI) is free of estimation errors BER decreases when the number of receive antennas increases. However under imperfect CSI, BER is getting...
The paper reports a fast transmit antenna selection scheme employing block diagonalization for a multiuser MIMO system, in which a base station features more antennas than RF branches. The task of selecting an optimal sub-set of antennas is achieved in an iterative manner that requires a considerably less time than the earlier reported schemes employing a full search. The newly proposed transmission...
In this paper, we investigate a switching scheme involving antenna selection and transmit beamforming modes for a multiple input multiple output (MIMO) system operating over a varying Rician channel. It is shown that that beamforming outperforms antenna selection when line of sight (LOS) component dominates the channel. Also transmit beamforming is superior over antenna selection at high values of...
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