Suboptimal soft-output MAP detector with lattice reduction

Author

Silvola, Pirkka ; Hooli, Kari ; Juntti, Markku

Author_Institution

Centre for Wireless Commun., Oulu Univ., Finland

Volume

13

Issue

6

fYear

2006

fDate

6/1/2006 12:00:00 AM

Firstpage

321

Lastpage

324

Abstract

The use of lattice reduction (LR) has been shown to be a very effective method for signal detection in multiple antenna systems. In this letter, the performance of the suboptimal soft-output maximum a posteriori (MAP) detector with lattice reduction is studied. We propose two polynomial-time methods for flat fading channels to generate the desired size candidate list in the reduced lattice. The suboptimal soft-output MAP detector with these list generation methods provides a near-optimal performance in uncorrelated multiple-input multiple-output systems but with significantly reduced computational complexity.

Keywords

MIMO systems; antenna arrays; fading channels; maximum likelihood detection; flat fading channel; lattice reduction; maximum aposteriori detector; multiple antenna system; polynomial-time method; signal detection; suboptimal soft-output MAP; uncorrelated multiple-input multiple-output system; Computational complexity; Detectors; Fading; Instruments; Lattices; MIMO; Mean square error methods; Polynomials; Quadrature phase shift keying; Signal processing algorithms; Candidate list generation; lattice reduction (LR); minimum mean square error (MMSE); multiple-input multiple-output (MIMO); reduced candidate list;

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/LSP.2006.871726

Filename

1632058