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Electronics and Telecommunications Research Institute (한국전자통신연구원)
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Block-Mode Lattice Reduction for Low-Complexity MIMO Detection

  • Choi, Kwon-Hue (Department of Information & Communication Engineering, Yeungnam University) ;
  • Kim, Han-Nah (Broadcasting & Telecommunications Convergence Research Laboratory, ETRI) ;
  • Kim, Soo-Young (Division of Electronic Engineering, Chonbuk National University) ;
  • Kim, Young-Il (Broadcasting & Telecommunications Convergence Research Laboratory, ETRI)
  • Received : 2011.04.06
  • Accepted : 2011.05.30
  • Published : 2012.02.01
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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.

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References

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Cited by

  1. Computationally Efficient Lattice Reduction Aided Detection for MIMO-OFDM Systems under Correlated Fading Channels vol.34, pp.4, 2012, https://doi.org/10.4218/etrij.12.0111.0707