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Erschienen in:
2011 | OriginalPaper | Buchkapitel
Simple Block-Diagonalization Based Suboptimal Method for MIMO Multiuser Downlink Transmission
verfasst von : Tetsuki Taniguchi, Yoshio Karasawa, Nobuo Nakajima
Erschienen in: Digital Information and Communication Technology and Its Applications
Verlag: Springer Berlin Heidelberg
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For MIMO (multiple input multiple output) multiuser downlink processing, block diagonalization (BD) technique is widely used because of its simplicity and high efficiency to eliminate the interuser interferences. In this study, we present very simple weight design approach based on BD, in which the order of design steps is swapped, namely, receiver weights are calculated first, and then transmission weights are derived using zero forcing (ZF) procedure. Computer simulations show that the proposed approach achieves better performance than the conventional BD under certain conditions. In addition, the condition on the degrees of freedom is released, hence it can be utilized for the transmitters with small number of antennas to which BD cannot be applied.