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A lattice reduction (LR) aided precoding mechanism is proposed for the closed-loop multiple input multiple output (MIMO) systems. According to this mechanism, a LR based codebook construction algorithm is proposed. In this codebook construction algorithm, the channel matrix is quantified basing the lattice reduction operation. On one hand, this precoding mechanism achieves full receive diversity gain,...
Time-varying channel degrades the performance of LTE-Advanced system due to the Intercarrier Interference (ICI) and imperfect channel estimation. In this paper, we propose a practical strategy by bit-interleaving preprocessing in transmitting part for Doppler diversity in high-speed scenario. Time-varying channel frequency response and effect of coding rate to this algorithm are analyzed. In addition,...
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