Space-Time Coding: Theory and Practice
Space-Time Coding: Theory and Practice
IEEE Transactions on Signal Processing
High-SNR Analytical Performance of Spatial Multiplexing MIMO Systems With CSI
IEEE Transactions on Signal Processing
Space-time diversity systems based on linear constellation precoding
IEEE Transactions on Wireless Communications
IEEE Transactions on Information Theory
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We present and analyze the performance of constellation precoded beamforming. This multi-input multi-output transmission technique is based on the singular value decomposition of a channel matrix. In this work, the beamformer is precoded to improve its diversity performance. It was shown previously that while single beamforming achieves full diversity without channel coding, multiple beamforming results in diversity loss. In this paper, we show that a properly designed constellation precoder makes uncoded multiple beamforming achieve full diversity order. We also show that partially precoded multiple beamforming gets better diversity order than multiple beamforming without constellation precoder if the subchannels to be precoded are properly chosen. We propose several criteria to design the constellation precoder. Simulation results match the analysis, and show that precoded multiple beamforming actually outperforms single beamforming without precoding at the same system data rate while achieving full diversity order.