Block-Mode Lattice Reduction for Low-Complexity MIMO Detection

ETRI Journal

关键词: time varying fading;    lattice reduction;    MIMO;   

Others  :  1186437
DOI  :  10.4218/etrij.12.0211.0112

【 摘 要 】

We propose a very-low-complexity lattice-reduction (LR) algorithm for multi-input multi-output detection in time-varying channels. The proposed scheme reduces the complexity by performing LR in a block-wise manner. The proposed scheme takes advantage of the temporal correlation of the channel matrices in a block and its impact on the lattice transformation matrices during the LR process. From this, the proposed scheme can skip a number of redundant LR processes for consecutive channel matrices and performs a single LR in a block. As the Doppler frequency decreases, the complexity reduction efficiency becomes more significant.

   

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