TY - GEN
T1 - A low-complexity cross-antenna rotation and inversion scheme for PAPR reduction of STBC MIMO-OFDM systems
AU - Su, Yi Sheng
AU - Wu, Tsung Cheng
AU - Wang, Chung-Hsuan
AU - Chang, Min Kuan
PY - 2011/8/10
Y1 - 2011/8/10
N2 - In this paper, a reduced-complexity cross-antenna rotation and inversion (CARI) scheme based on the cross-entropy (CE) method is proposed for the reduction of peak-to-average power ratio (PAPR) in multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems with space-time block coding (STBC). A few PAPR reduction techniques for STBC MIMO-OFDM systems have been proposed in the literature, among which the CARI technique can significantly reduce the PAPR by fully utilizing additional degrees of freedom provided by employing multiple transmit antennas. However, the CARI technique requires an exhaustive search over all combinations of rotation and inversion, whose complexity increases exponentially with the number of subblocks. To simultaneously reduce the complexity and offer lower PAPR, the PAPR reduction with CARI technique is formulated as a combinatorial optimization problem and then the CE method is applied to search the optimal combination of rotation and inversion. Simulation results show that the proposed CE-based scheme is an efficient method to greatly reduce the complexity for larger numbers of subblocks while still achieving significant PAPR reduction of STBC MIMO-OFDM systems.
AB - In this paper, a reduced-complexity cross-antenna rotation and inversion (CARI) scheme based on the cross-entropy (CE) method is proposed for the reduction of peak-to-average power ratio (PAPR) in multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems with space-time block coding (STBC). A few PAPR reduction techniques for STBC MIMO-OFDM systems have been proposed in the literature, among which the CARI technique can significantly reduce the PAPR by fully utilizing additional degrees of freedom provided by employing multiple transmit antennas. However, the CARI technique requires an exhaustive search over all combinations of rotation and inversion, whose complexity increases exponentially with the number of subblocks. To simultaneously reduce the complexity and offer lower PAPR, the PAPR reduction with CARI technique is formulated as a combinatorial optimization problem and then the CE method is applied to search the optimal combination of rotation and inversion. Simulation results show that the proposed CE-based scheme is an efficient method to greatly reduce the complexity for larger numbers of subblocks while still achieving significant PAPR reduction of STBC MIMO-OFDM systems.
KW - Multiple-input multiple-output (MIMO)
KW - cross-entropy (CE) method
KW - orthogonal frequency division multiplexing (OFDM)
KW - peak-to-average power ratio (PAPR)
KW - space-time block coding (STBC)
UR - http://www.scopus.com/inward/record.url?scp=79961141755&partnerID=8YFLogxK
U2 - 10.1109/CAMAD.2011.5941112
DO - 10.1109/CAMAD.2011.5941112
M3 - Conference contribution
AN - SCOPUS:79961141755
SN - 9781612842820
T3 - 2011 IEEE 16th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks, CAMAD 2011
SP - 31
EP - 35
BT - 2011 IEEE 16th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks, CAMAD 2011
T2 - 2011 IEEE 16th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks, CAMAD 2011
Y2 - 10 June 2011 through 11 June 2011
ER -