Fast Maximum-Likelihood Decoding of 4X4 Full-Diversity Quasi-Orthogonal STBCs with QAM Signals

Author

Kundu, Sandipan ; Su, Weifeng ; Pados, Dimitris A. ; Medley, Michael J.

Author_Institution

Dept. of Electr. Eng., State Univ. of New York at Buffalo, Buffalo, NY, USA

fYear

2010

fDate

6-10 Dec. 2010

Firstpage

1

Lastpage

5

Abstract

In this paper, we present the lowest-computational-complexity maximum-likelihood (ML) decoder known to-date for 4×4 full-diversity Quasi-Orthogonal Space-Time Block Codes (QO-STBC) with symbols from square or rectangular quadrature amplitude modulation (QAM) constellations. The complexity savings come from a simplified quadratic ML decoding statistic that is being presented and the utilization of the signal points of the QAM constellation. Comparative computational complexity analysis is carried out and a simulation study demonstrates the theoretical equivalence of the proposed and original ML implementation.

Keywords

diversity reception; maximum likelihood decoding; orthogonal codes; quadrature amplitude modulation; space-time block codes; ML decoding; QAM signals; constellation code; diversity reception; maximum likelihood decoding; quadrature amplitude modulation; quasi-orthogonal STBC; Artificial intelligence; Block codes; Complexity theory; Constellation diagram; Maximum likelihood decoding; Quadrature amplitude modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference (GLOBECOM 2010), 2010 IEEE

Conference_Location

Miami, FL

ISSN

1930-529X

Print_ISBN

978-1-4244-5636-9

Electronic_ISBN

1930-529X

Type

conf

DOI

10.1109/GLOCOM.2010.5684116

Filename

5684116