Comparison of MIMO Transceiver Techniques with Practical Considerations

Conference: European Wireless 2006 - 12th European Wireless Conference 2006 - Enabling Technologies for Wireless Multimedia Communications
04/02/2006 - 04/05/2006 at Athens, Greece

Proceedings: European Wireless 2006

Pages: 5Language: englishTyp: PDF

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Lee, S. H.; Thompson, J. S. (University of Edinburgh, Institute for Digital Communications, Edinburgh, UK)

Recently, multiple-input multipleoutput (MIMO) techniques have received a lot of attention because of their high spectral efficiency. Recent studies have been focused on the practical implementation of these MIMO techniques. In this paper, a comparison of MIMO transceiver techniques such as Tomlinson-Harashima precoding (THP), zero forcing dirty paper coding (ZF-DPC) and vertical Bell Laboratories Layered Space-Time (V-BLAST) is performed. We consider the effect of practical impairments such as imperfect CSI (channel state information) and a transmit power constraint. If the total power is restricted at the transmitter for fairness, ZF-DPC performs worst among those techniques although it does not suffer modulo loss and error propagation. Due to the presubtraction of the spatial interference, precoding techniques like ZF-DPC and THP are more sensitive to the effect of imperfect CSI than V-BLAST.