Minimum Euclidean Distance Based Precoders for MIMO Systems Using Rectangular QAM Modulations

作者：Quoc Tuong Ngo^*; Berder Olivier; Scalart Pascal

来源：IEEE Transactions on Signal Processing, 2012, 60(3): 1527-1533.

DOI：10.1109/TSP.2011.2177972

• Channel state information (CSI)
• linear precoder
• minimum Euclidean distance
• multiple input multiple output (MIMO)
• ML receiver
• spatial multiplexing

From the feedback of the channel state information (CSI), precoding techniques improve the performance of multiple-input multiple-output (MIMO) systems by optimizing various criteria. In this correspondence, an efficient precoder that maximizes the minimum distance (d(min)) of two received vectors is studied. This criterion leads to a nondiagonal precoding scheme and allows achieving a full diversity order. However, the optimized solution for MIMO systems using a high-order QAM modulation is rather complex and changes for different constellations. Therefore, we propose herein a general form of minimum Euclidean distance based precoders for all rectangular QAM modulations. It is shown that the new solution optimizes the distance d(min) for small and large dispersive channels.

• 出版日期2012-3