TY - GEN
T1 - Symbol based rate adaptation in coded MIMO-OFDM systems
AU - Sung, Chang Kyung
AU - Lee, Inkyu
PY - 2006
Y1 - 2006
N2 - The use of space-division multiple access (SDMA) in the downlink of multiuser multi-input/multi-output (MIMO) wireless transmission systems can provide substantial gains in system throughput. When the channel state information (CSI) is available at the transmitter, a considerable performance improvement can be attained by adapting the transmission rates to the reported CSI. In addition, to combat frequency selective fadings in wideband wireless channels, bit-interleaved coded OFDM (BIC-OFDM) modulation schemes are employed to provide reliable packet delivery by utilizing frequency diversity through channel coding. In this paper, we propose an adaptive modulation and coding (AMC) scheme combined with an opportunistic scheduling technique for the MIMO BIC-OFDM with bandwidth-limited feedback channels. The proposed scheme enhances the link performance by exploiting both the frequency diversity and the multiuser diversity. To reduce the feedback information, the proposed AMC scheme employs rate adaptation methods based on an OFDM symbol rather than on the whole subchannels. Simulation results show that the proposed scheme exhibits a substantial performance gain with a reasonable complexity over single antenna systems.
AB - The use of space-division multiple access (SDMA) in the downlink of multiuser multi-input/multi-output (MIMO) wireless transmission systems can provide substantial gains in system throughput. When the channel state information (CSI) is available at the transmitter, a considerable performance improvement can be attained by adapting the transmission rates to the reported CSI. In addition, to combat frequency selective fadings in wideband wireless channels, bit-interleaved coded OFDM (BIC-OFDM) modulation schemes are employed to provide reliable packet delivery by utilizing frequency diversity through channel coding. In this paper, we propose an adaptive modulation and coding (AMC) scheme combined with an opportunistic scheduling technique for the MIMO BIC-OFDM with bandwidth-limited feedback channels. The proposed scheme enhances the link performance by exploiting both the frequency diversity and the multiuser diversity. To reduce the feedback information, the proposed AMC scheme employs rate adaptation methods based on an OFDM symbol rather than on the whole subchannels. Simulation results show that the proposed scheme exhibits a substantial performance gain with a reasonable complexity over single antenna systems.
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M3 - Conference contribution
AN - SCOPUS:34047153809
SN - 0780393929
SN - 9780780393929
T3 - IEEE Vehicular Technology Conference
SP - 2078
EP - 2082
BT - 2006 IEEE 63rd Vehicular Technology Conference, VTC 2006-Spring - Proceedings
T2 - 2006 IEEE 63rd Vehicular Technology Conference, VTC 2006-Spring
Y2 - 7 May 2006 through 10 July 2006
ER -