TY - GEN
T1 - Multi-user joint Tx/iterative Rx MMSE-FDE and successive MUI cancellation for uplink DS-CDMA
AU - Takeda, Kazuki
AU - Adach, Fumiyuki
PY - 2011
Y1 - 2011
N2 - Uplink multi-user direct sequence-code division multiaccess (DS-CDMA) suffers from strong multi-user interference (MUI) and self inter-chip interference (ICI) caused by severe frequency-selective fading. In this paper, we propose a joint Tx/iterative Rx frequency-domain equalization (FDE) based on minimum mean square error (MMSE) criterion and successive MUI cancellation (MUIC) for DS-CDMA uplink. In the proposed scheme, each user applies one-tap Tx FDE before transmitting signal. At the base station, joint one-tap Rx FDE and successive MUIC is iteratively performed. The FDE weights of users and base station are jointly optimized based on the MMSE criterion in order to reduce MUI and ICI while exploiting channel frequency-selectivity. Computer simulation results show that the proposed scheme provides much improved bit error rate (BER) performance than the conventional iterative Rx MMSE-FDE with successive MUIC.
AB - Uplink multi-user direct sequence-code division multiaccess (DS-CDMA) suffers from strong multi-user interference (MUI) and self inter-chip interference (ICI) caused by severe frequency-selective fading. In this paper, we propose a joint Tx/iterative Rx frequency-domain equalization (FDE) based on minimum mean square error (MMSE) criterion and successive MUI cancellation (MUIC) for DS-CDMA uplink. In the proposed scheme, each user applies one-tap Tx FDE before transmitting signal. At the base station, joint one-tap Rx FDE and successive MUIC is iteratively performed. The FDE weights of users and base station are jointly optimized based on the MMSE criterion in order to reduce MUI and ICI while exploiting channel frequency-selectivity. Computer simulation results show that the proposed scheme provides much improved bit error rate (BER) performance than the conventional iterative Rx MMSE-FDE with successive MUIC.
KW - DSCDMA
KW - Frequency-domain equalization
KW - MUI cancellation
KW - Uplink
UR - http://www.scopus.com/inward/record.url?scp=80051976989&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80051976989&partnerID=8YFLogxK
U2 - 10.1109/VETECS.2011.5956384
DO - 10.1109/VETECS.2011.5956384
M3 - Conference contribution
AN - SCOPUS:80051976989
SN - 9781424483310
T3 - IEEE Vehicular Technology Conference
BT - 2011 IEEE 73rd Vehicular Technology Conference, VTC2011-Spring - Proceedings
T2 - 2011 IEEE 73rd Vehicular Technology Conference, VTC2011-Spring
Y2 - 15 May 2011 through 18 May 2011
ER -