Block-mode lattice reduction for low-complexity mimo detection

  • Choi K
  • Kim H
  • Kim S
 et al. 
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Abstract

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.

Author-supplied keywords

  • Lattice reduction
  • MIMO
  • Time varying fading

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Authors

  • Kwonhue Choi

  • Hannah Kim

  • Sooyoung Kim

  • Young Il Kim

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