MIMO Channel Matrix Condition Number Estimation and Threshold Selection for Combined K-Best Sphere Decoders

Sandra ROGER  Alberto GONZALEZ  Vicenc ALMENAR  Antonio M. VIDAL  

IEICE TRANSACTIONS on Communications   Vol.E92-B   No.4   pp.1380-1383
Publication Date: 2009/04/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E92.B.1380
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
MIMO detection,  K-Best Sphere Decoder,  matrix condition number estimation,  threshold selection,  

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It is known that MIMO channel matrix condition number influences detectors performance. Several authors have proposed combined decoders, mainly suboptimal, to cope with this fact. These combined algorithms require an estimation of the MIMO channel matrix condition number and a selection of a suitable threshold condition number. This letter presents practical algorithms to carry out the referred tasks and shows their performance in practice.