LATTICE-REDUCTION-AIDED MIMO DETECTORS
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United States of America Patent
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Issued Date -
Aug 6, 2009
app pub date -
Jan 31, 2008
filing date -
Jan 31, 2008
priority date (Note) -
Abandoned
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Abstract
A Lenstra-Lenstra-Lovász (LLL)-based technique is utilized to reduce the complexity of a MIMO detector. Basis vectors can be pre-sorted, such as by V-BLAST ordering or sorted-QR ordering, prior to applying Gram-Schmidt Orthogonalization (GSO) to further improve performance. Alternatively, a joint sorting and LLL reduction (JSAR) technique can be utilized such that after each reduction step, a vector remaining to be reduced can be selected that will minimize the overall complexity. The JSAR technique can be applied on real or complex lattice bases. LLL reduction can be stopped after a predetermined threshold is exceeded.
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