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Robust linear receivers for space-time block coded multiaccess MIMO systems with imperfect channel state information

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3 Author(s)
Yue Rong ; Dept. of Commun. Syst., Univ. of Duisburg-Essen, Duisburg, Germany ; ShahbazPanahi, S. ; Gershman, A.B.

Recently, several linear receiver algorithms have been developed for space-time block-coded multiaccess multiple-input multiple-output (MIMO) wireless communication systems. All these techniques are based on the assumption that the channel state information (CSI) at the receiver side is perfect. However, in practical situations, the available CSI may be imperfect because of channel estimation errors and/or outdated training. In this paper, we develop new robust linear receiver techniques for joint space-time decoding and interference rejection in multiaccess MIMO systems that use orthogonal space-time block codes and erroneous CSI. The proposed receivers are based on worst-case performance optimization. They are shown to provide a substantially improved robustness against CSI mismatches as compared with the existing linear multiaccess MIMO receivers.

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Signal Processing, IEEE Transactions on  (Volume:53 ,  Issue: 8 )