An extended semidefinite-relaxation method for MIMO detection of high-order QAM signals

Author

Cai, Shu ; Yang, Kehu

Author_Institution

ISN Lab., Xidian Univ., Xi´´an, China

fYear

2009

fDate

26-28 Aug. 2009

Firstpage

1

Lastpage

4

Abstract

In this paper, we propose an extended semidefinite-relaxation (SDR) method for multiple-input multiple-output (MIMO) detection of high-order QAM signals. In the proposed method, high-order QAM constellations are represented by an equivalent virtually-antipodal form. Based on this form, the alphabet relaxation components in the existing SDR formulation can be constrained to the original alphabet set by additional inequalities. Simulation results demonstrate that the extended SDR method provides an alternative to the existing SDR algorithm of with compact formulation for arbitrary constellations.

Keywords

MIMO communication; quadrature amplitude modulation; MIMO detection; alphabet relaxation components; extended semidefinite-relaxation method; high-order QAM constellations; high-order QAM signals; multiple-input multiple-output detection; virtually-antipodal form; Approximation methods; Computational complexity; Detectors; Error probability; MIMO; Maximum likelihood detection; NP-hard problem; Quadrature amplitude modulation; Receiving antennas; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications and Networking in China, 2009. ChinaCOM 2009. Fourth International Conference on

Conference_Location

Xian

Print_ISBN

978-1-4244-4337-6

Electronic_ISBN

978-1-4244-4337-6

Type

conf

DOI

10.1109/CHINACOM.2009.5339927

Filename

5339927