TY - GEN
T1 - Low complexity transmit antenna selection with power balancing in OFDM systems
AU - Park, Ki Hong
AU - Ko, Young Chai
AU - Alouini, Mohamed Slim
PY - 2009
Y1 - 2009
N2 - In this paper, we consider multi-carrier systems with multiple transmit antennas under a power balancing constraint. Applying transmit antenna selection and fixed-power variable-rate transmission per subcarrier as a function of channel variations, we propose an implementation-friendly antenna selection method which offers a reduced complexity in comparison with the optimal antenna selection scheme, which uses numerical optimization. More specifically, in order to solve the subcarrier imbalance across the antennas, we operate a two-step reallocation procedure in order to minimize loss of spectral efficiency. We also provide an analytic lower bound on the spectral efficiency for the proposed scheme. Although this scheme is suboptimal, we show based on some selected numerical examples that our proposed scheme offers almost the same spectral efficiency as the optimal scheme.
AB - In this paper, we consider multi-carrier systems with multiple transmit antennas under a power balancing constraint. Applying transmit antenna selection and fixed-power variable-rate transmission per subcarrier as a function of channel variations, we propose an implementation-friendly antenna selection method which offers a reduced complexity in comparison with the optimal antenna selection scheme, which uses numerical optimization. More specifically, in order to solve the subcarrier imbalance across the antennas, we operate a two-step reallocation procedure in order to minimize loss of spectral efficiency. We also provide an analytic lower bound on the spectral efficiency for the proposed scheme. Although this scheme is suboptimal, we show based on some selected numerical examples that our proposed scheme offers almost the same spectral efficiency as the optimal scheme.
UR - http://www.scopus.com/inward/record.url?scp=70449565258&partnerID=8YFLogxK
U2 - 10.1109/SPAWC.2009.5161807
DO - 10.1109/SPAWC.2009.5161807
M3 - Conference contribution
AN - SCOPUS:70449565258
SN - 9781424436965
T3 - IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC
SP - 359
EP - 363
BT - 2009 IEEE 10th Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2009
T2 - 2009 IEEE 10th Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2009
Y2 - 21 June 2009 through 24 June 2009
ER -