Open AccessBlock‐Mode Lattice Reduction for Low‐Complexity MIMO Detection
Author(s) -
Choi Kwonhue,
Kim Hannah,
Kim Sooyoung,
Kim Youngil
Publication year - 2012
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.12.0211.0112
Subject(s) - lattice reduction , algorithm , reduction (mathematics) , lattice (music) , computational complexity theory , mimo , block (permutation group theory) , mathematics , transformation (genetics) , channel (broadcasting) , computer science , theoretical computer science , telecommunications , physics , combinatorics , biochemistry , geometry , chemistry , acoustics , gene
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.