A Gram-Schmidt Based Lattice-Reduction Aided MMSE Detection in MIMO Systems

Author

Fujino, Tadashi ; Wakazono, Shinjiro ; Sasaki, Yusuke

Author_Institution

Univ. of Electro-Commun., Chofu, Japan

fYear

2009

Firstpage

1

Lastpage

8

Abstract

This paper proposes an improved lattice-reduction aided (LRA) MMSE detection based on the Gram-Schmidt (GS) procedure. The proposed detection reduces the column vectors of the MIMO channel matrix using the LLL algorithm and the GS procedure to create mutually purely orthogonal column vectors of the reduced channel matrix. Then the decision boundary becomes the same as that for the ML detection. Compared to the conventional LRA MMSE detector, the proposed detector achieves much closer BER performances to those for the ML detector in both the 4 Ã— 4 MIMO and the 8 Ã— 8 MIMO systems.

Keywords

MIMO communication; least mean squares methods; matrix algebra; maximum likelihood detection; BER; Gram-Schmidt based lattice-reduction aided MMSE detection; LLL algorithm; MIMO channel matrix; maximum likelihood detection; orthogonal column vectors; Bit error rate; Channel capacity; Detectors; Gaussian processes; MIMO; Maximum likelihood detection; Maximum likelihood estimation; Mean square error methods; Receiving antennas; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 2009. GLOBECOM 2009. IEEE

Conference_Location

Honolulu, HI

ISSN

1930-529X

Print_ISBN

978-1-4244-4148-8

Type

conf

DOI

10.1109/GLOCOM.2009.5425721

Filename

5425721