TY - GEN
T1 - Minimal antenna-subset selection under capacity constraint for power-efficient MIMO systems
T2 - 2010 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2010
AU - Yukawa, Masahiro
AU - Yamada, Isao
PY - 2010
Y1 - 2010
N2 - This paper addresses the minimal subset selection of antennas achieving designated channel capacity. This is one of the most natural approaches to alleviating the power consumption in MIMO systems, while it is a mathematically challenging nonlinearly-constrained sparse optimization (ℓ0-norm minimization) problem. We present an efficient algorithmic solution, to this highly combinatorial problem, using convex and differentiable relaxations of the ℓ0-norm. The proposed algorithm is based on the hybrid steepest descent method for the subgradient projection operator together with the soft-thresholding technique, minimizing the Moreau envelope of the ℓ1-norm subject to the capacity constraint. The simulation results show that the proposed algorithm realizes a near optimal solution to the original nonlinearly-constrained sparse optimization problem.
AB - This paper addresses the minimal subset selection of antennas achieving designated channel capacity. This is one of the most natural approaches to alleviating the power consumption in MIMO systems, while it is a mathematically challenging nonlinearly-constrained sparse optimization (ℓ0-norm minimization) problem. We present an efficient algorithmic solution, to this highly combinatorial problem, using convex and differentiable relaxations of the ℓ0-norm. The proposed algorithm is based on the hybrid steepest descent method for the subgradient projection operator together with the soft-thresholding technique, minimizing the Moreau envelope of the ℓ1-norm subject to the capacity constraint. The simulation results show that the proposed algorithm realizes a near optimal solution to the original nonlinearly-constrained sparse optimization problem.
KW - Antenna selection
KW - Convex optimization
KW - MIMO systems
UR - http://www.scopus.com/inward/record.url?scp=78049368134&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78049368134&partnerID=8YFLogxK
U2 - 10.1109/ICASSP.2010.5496109
DO - 10.1109/ICASSP.2010.5496109
M3 - Conference contribution
AN - SCOPUS:78049368134
SN - 9781424442966
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - 3058
EP - 3061
BT - 2010 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2010 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
Y2 - 14 March 2010 through 19 March 2010
ER -