A Semidefinite Relaxation Approach to MIMO Detection for High-Order QAM Constellations

Author

Sidiropoulos, Nicholas D. ; Luo, Zhi-Quan

Author_Institution

Dept. of Electron. & Comput. Eng., Tech. Univ. of Crete, Chania-Crete

Volume

13

Issue

9

fYear

2006

Firstpage

525

Lastpage

528

Abstract

A new and conceptually simple semidefinite relaxation approach is proposed for MIMO detection in communication systems employing high-order QAM constellations. The new approach affords improved detection performance compared to existing solutions of comparable worst-case complexity order, which is nearly cubic in the dimension of the transmitted symbol vector and independent of the constellation order for uniform QAM, or affine in the constellation order for nonuniform QAM

Keywords

MIMO systems; quadrature amplitude modulation; signal detection; MIMO detection; communication systems; high-order QAM constellation; multiple input multiple output system; quadrature amplitude modulation; semidefinite relaxation approach; symbol vector transmission; Binary phase shift keying; Decoding; Detectors; Gaussian noise; Lattices; Least squares methods; MIMO; Multiuser detection; Quadrature amplitude modulation; Search problems; High-order QAM; integer least squares; lattice search; multiple-input multiple-output (MIMO) detection; multiuser detection; semidefinite programming; semidefinite relaxation (SDR);

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/LSP.2006.874443

Filename

1673411