TY - GEN
T1 - Subcarrier-grouping based detection schemes for multi-layer STBC coded MIMO-OFDM
AU - Lei, Ming
AU - Funada, Ryuhei
AU - Harada, Hiroshi
AU - Kato, Shuuzou
PY - 2007/11/27
Y1 - 2007/11/27
N2 - We propose a multi-layer space-time block coded orthogonal frequency division multiplexing (Multi-Layer STBC OFDM) scheme. It combines the spatial diversity and spatial multiplexing in order to exploit the benefits of both techniques. The transmit antennas are divided into several layers and each layer is encoded by STBC. The antennas transmit OFDM signals in order to deal with frequency-selective fading channels. In addition to Exhaustive Detection Scheme which applies the same detection at each subcarrier independently, we exploit the subcarrier correlation to develop two subcarrier-grouping based detection schemes. The subcarriers bound into the same group share the same detection parameters, e.g., layer detection order or nulling matrices, which are obtained at the center subcarrier of that group. The proposed schemes can significantly reduce the complexity with very small performance loss. The simulation results show that compared with Exhaustive Detection Scheme, the propose detection scheme is capable of reducing 51.79% complexity with only 0.5dB performance loss for 4×4 system, and reducing 69.96% complexity with only 1.0dB performance loss for 6×6 system.
AB - We propose a multi-layer space-time block coded orthogonal frequency division multiplexing (Multi-Layer STBC OFDM) scheme. It combines the spatial diversity and spatial multiplexing in order to exploit the benefits of both techniques. The transmit antennas are divided into several layers and each layer is encoded by STBC. The antennas transmit OFDM signals in order to deal with frequency-selective fading channels. In addition to Exhaustive Detection Scheme which applies the same detection at each subcarrier independently, we exploit the subcarrier correlation to develop two subcarrier-grouping based detection schemes. The subcarriers bound into the same group share the same detection parameters, e.g., layer detection order or nulling matrices, which are obtained at the center subcarrier of that group. The proposed schemes can significantly reduce the complexity with very small performance loss. The simulation results show that compared with Exhaustive Detection Scheme, the propose detection scheme is capable of reducing 51.79% complexity with only 0.5dB performance loss for 4×4 system, and reducing 69.96% complexity with only 1.0dB performance loss for 6×6 system.
KW - MIMO
KW - OFDM
KW - STBC
KW - Subcarrier grouping
UR - http://www.scopus.com/inward/record.url?scp=36348986001&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=36348986001&partnerID=8YFLogxK
U2 - 10.1109/WCNC.2007.160
DO - 10.1109/WCNC.2007.160
M3 - Conference contribution
AN - SCOPUS:36348986001
SN - 1424406595
SN - 9781424406593
T3 - IEEE Wireless Communications and Networking Conference, WCNC
SP - 842
EP - 847
BT - 2007 IEEE Wireless Communications and Networking Conference, WCNC 2007
T2 - 2007 IEEE Wireless Communications and Networking Conference, WCNC 2007
Y2 - 11 March 2007 through 15 March 2007
ER -