TY - GEN
T1 - A square-root adaptive V-BLAST algorithm for fast time-varying MIMO channels
AU - Rontogiannis, Athanasios A.
AU - Kekatos, Vassilis
AU - Berberidis, Kostas
PY - 2006
Y1 - 2006
N2 - Among the methods that have been proposed for a Multiple-Input Multiple-Output (MIMO) receiver, the V-BLAST algorithm provides a good compromise between transmission rate, achievable diversity, and decoding complexity. In this paper, we derive a new adaptive V-BLAST type equalization scheme for fast time varying, flat fading MIMO channels. The proposed equalizer stems from the Cholesky factorization of MIMO system's output data autocorrelation matrix and the equalizer's filters are updated in time using numerically robust unitary Givens rotations. The new square-root algorithm exhibits identical performance to a recently proposed V-BLAST adaptive algorithm, offering at the same time substantially reduced computational complexity. Moreover, as expected due to its squareroot form and verified by simulations, the algorithm exhibits particularly favourable numerical behaviour.
AB - Among the methods that have been proposed for a Multiple-Input Multiple-Output (MIMO) receiver, the V-BLAST algorithm provides a good compromise between transmission rate, achievable diversity, and decoding complexity. In this paper, we derive a new adaptive V-BLAST type equalization scheme for fast time varying, flat fading MIMO channels. The proposed equalizer stems from the Cholesky factorization of MIMO system's output data autocorrelation matrix and the equalizer's filters are updated in time using numerically robust unitary Givens rotations. The new square-root algorithm exhibits identical performance to a recently proposed V-BLAST adaptive algorithm, offering at the same time substantially reduced computational complexity. Moreover, as expected due to its squareroot form and verified by simulations, the algorithm exhibits particularly favourable numerical behaviour.
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U2 - 10.1109/ICC.2006.255287
DO - 10.1109/ICC.2006.255287
M3 - Conference contribution
AN - SCOPUS:42549151569
SN - 1424403553
SN - 9781424403554
T3 - IEEE International Conference on Communications
SP - 3135
EP - 3139
BT - 2006 IEEE International Conference on Communications, ICC 2006
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2006 IEEE International Conference on Communications, ICC 2006
Y2 - 11 July 2006 through 15 July 2006
ER -