TY - GEN
T1 - An efficient decoding algorithm for STBC with multi-dimensional rotated constellations
AU - Lee, Heunchul
AU - Cho, Jungho
AU - Kim, Jongkyu
AU - Lee, Inkyu
PY - 2006
Y1 - 2006
N2 - In this paper, we present a novel maximum likelihood (ML) decoding algorithm for space-time block codes (STBC) over fading channels. Using a lattice representation for space-time codes by transforming complex channel models into real matrix equations, we propose a new efficient ML decoding algorithm with performance identical to the conventional ML decoder. We show that the complex orthogonal space-time codes, in fact, allow a separate ML decoding for each in-phase and quadrature-phase component. For rate one quasi-orthogonal designs with N transmit antennas (N ≥ 4), the proposed decoding scheme reduces the decoding complexity from script O sign (M cN/2) to script O sign(McN/4) in a Mc-QAM constellation. Moreover, multidimensional rotated constellations are constructed by which the quasi-orthogonal codes can achieve full diversity, while the proposed ML decoding method offers significant computational savings as compared with previous approaches.
AB - In this paper, we present a novel maximum likelihood (ML) decoding algorithm for space-time block codes (STBC) over fading channels. Using a lattice representation for space-time codes by transforming complex channel models into real matrix equations, we propose a new efficient ML decoding algorithm with performance identical to the conventional ML decoder. We show that the complex orthogonal space-time codes, in fact, allow a separate ML decoding for each in-phase and quadrature-phase component. For rate one quasi-orthogonal designs with N transmit antennas (N ≥ 4), the proposed decoding scheme reduces the decoding complexity from script O sign (M cN/2) to script O sign(McN/4) in a Mc-QAM constellation. Moreover, multidimensional rotated constellations are constructed by which the quasi-orthogonal codes can achieve full diversity, while the proposed ML decoding method offers significant computational savings as compared with previous approaches.
KW - Diversity methods
KW - Maximum likelihood decoding
KW - Space-Time Block Coding (STBC)
UR - https://www.scopus.com/pages/publications/34249096923
UR - https://www.scopus.com/pages/publications/34249096923#tab=citedBy
U2 - 10.1109/ICC.2006.255547
DO - 10.1109/ICC.2006.255547
M3 - Conference contribution
AN - SCOPUS:34249096923
SN - 1424403553
SN - 9781424403554
T3 - IEEE International Conference on Communications
SP - 5558
EP - 5563
BT - 2006 IEEE International Conference on Communications, ICC 2006
T2 - 2006 IEEE International Conference on Communications, ICC 2006
Y2 - 11 July 2006 through 15 July 2006
ER -