TY - GEN
T1 - Downlink DS-CDMA transmission with joint MMSE equalization and ICI cancellation
AU - Takeda, Kazuaki
AU - Ishihara, Koichi
AU - Adachi, Fumiyuki
PY - 2006
Y1 - 2006
N2 - The bit error rate (BER) performance of downlink DS-CDMA in a frequency-selective fading channel can be significantly improved by the use of frequency-domain equalization (FDE) based on minimum mean square error (MMSE) criterion. However, the presence of residual inter-chip-inference (ICI) after FDE produces the orthogonality distortion among the spreading codes and the BER performance degrades as the number of multiplex order increases. In this paper, we propose a joint MMSE-FDE and ICI cancellation to improve the BER performance of the DS-CDMA downlink. In the proposed scheme, the residual ICI replica in the frequency-domain is generated and subtracted from each frequency component of the received signal after MMSE-FDE. The MMSE weight at each iteration is derived taking into account the residual ICI. The effect of the proposed ICI cancellation scheme is confirmed by computer simulation.
AB - The bit error rate (BER) performance of downlink DS-CDMA in a frequency-selective fading channel can be significantly improved by the use of frequency-domain equalization (FDE) based on minimum mean square error (MMSE) criterion. However, the presence of residual inter-chip-inference (ICI) after FDE produces the orthogonality distortion among the spreading codes and the BER performance degrades as the number of multiplex order increases. In this paper, we propose a joint MMSE-FDE and ICI cancellation to improve the BER performance of the DS-CDMA downlink. In the proposed scheme, the residual ICI replica in the frequency-domain is generated and subtracted from each frequency component of the received signal after MMSE-FDE. The MMSE weight at each iteration is derived taking into account the residual ICI. The effect of the proposed ICI cancellation scheme is confirmed by computer simulation.
KW - DS-CDMA
KW - Frequency-domain equalization
KW - ICI cancellation
KW - MMSE
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M3 - Conference contribution
AN - SCOPUS:34047101366
SN - 0780393929
SN - 9780780393929
T3 - IEEE Vehicular Technology Conference
SP - 1762
EP - 1766
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 -