TY - GEN
T1 - Joint frequency-domain differential detection and equalization for 2-dimensional spread/chip-interleaved DS-CDMA uplink transmissions
AU - Liu, Le
AU - Adachi, Fumiyuki
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2006
Y1 - 2006
N2 - The multiple-access interference (MAI) limits the performance of the DS-CDMA uplink transmission. 2 dimensional (2D) spread/chip-interleaved DS-CDMA is an MAI-free system, where single-user coherent frequency-domain equalization (FDE) can be used instead of complicated multiuser detection (MUD). However, coherent FDE needs channel estimation. Pilot-assisted channel estimation is not reliable in a fast fading environment. In this paper, we apply joint frequency-domain differential detection and equalization (FDDDE) that requires no channel estimation to 2D spread/chip-interleaved DS-CDMA in a multiuser/multipath environment. The filter coefficient used in FDDDE is updated by estimating the normalized Doppler frequency. Computer simulation results show that 2D spread/chip-interleaved DS-CDMA using FDDDE is robust against fast fading.
AB - The multiple-access interference (MAI) limits the performance of the DS-CDMA uplink transmission. 2 dimensional (2D) spread/chip-interleaved DS-CDMA is an MAI-free system, where single-user coherent frequency-domain equalization (FDE) can be used instead of complicated multiuser detection (MUD). However, coherent FDE needs channel estimation. Pilot-assisted channel estimation is not reliable in a fast fading environment. In this paper, we apply joint frequency-domain differential detection and equalization (FDDDE) that requires no channel estimation to 2D spread/chip-interleaved DS-CDMA in a multiuser/multipath environment. The filter coefficient used in FDDDE is updated by estimating the normalized Doppler frequency. Computer simulation results show that 2D spread/chip-interleaved DS-CDMA using FDDDE is robust against fast fading.
KW - 2-dimensional spreading
KW - Chip interleaving
KW - DS-CDMA uplink transmission
KW - Differential detection
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U2 - 10.1109/VTCF.2006.369
DO - 10.1109/VTCF.2006.369
M3 - Conference contribution
AN - SCOPUS:34548851970
SN - 1424400635
SN - 9781424400638
T3 - IEEE Vehicular Technology Conference
SP - 1768
EP - 1772
BT - 2006 IEEE 64th Vehicular Technology Conference, VTC-2006 Fall
T2 - 2006 IEEE 64th Vehicular Technology Conference, VTC-2006 Fall
Y2 - 25 September 2006 through 28 September 2006
ER -