Title :
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
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;
Conference_Titel :
Global Telecommunications Conference (GLOBECOM 2010), 2010 IEEE
Conference_Location :
Miami, FL
Print_ISBN :
978-1-4244-5636-9
Electronic_ISBN :
1930-529X
DOI :
10.1109/GLOCOM.2010.5684116
