Ellipse Expanding Method for Minimum Distance-Based MIMO Precoder

Author

Xu, Xiaodong ; Gu, Qiang ; Jiang, Yi ; Dai, Xuchu

Author_Institution

Univ. of Sci. & Technol. of China, Hefei, China

Volume

16

Issue

4

fYear

2012

fDate

4/1/2012 12:00:00 AM

Firstpage

490

Lastpage

493

Abstract

This letter proposes a new MIMO precoding method for dual-stream data transmission based on the criterion of minimum Euclidean distance. The problem is optimally solved by expanding an ellipse within a 2-dimensional lattice to the maximum extent. A closed-form expression of minimum Euclidean distance is derived for square quadrature amplitude modulation (QAM) constellations. The ellipse expanding method (EEM) allows for very efficient implementation by checking a small lookup table with respect to the condition number of channel matrix. Illustrative examples validate the promising performance of the proposed method in comparison with existing schemes.

Keywords

MIMO communication; matrix algebra; precoding; quadrature amplitude modulation; 2-dimensional lattice; EEM; MIMO precoding method; QAM constellation; channel matrix; dual-stream data transmission; ellipse expanding method; minimum Euclidean distance; square quadrature amplitude modulation; Closed-form solutions; Euclidean distance; Lattices; MIMO; Quadrature amplitude modulation; Table lookup; Vectors; MIMO; ellipse expanding; minimum Euclidean distance; precoder;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2012.020712.112349

Filename

6151761