TY - GEN
T1 - Frequency-domain soft interference cancellation for multicode CDMA transmissions
AU - Ishihara, Koichi
AU - Takeda, Kazuaki
AU - Adachi, Fumiyuki
PY - 2006
Y1 - 2006
N2 - Frequency-domain equalization (FDE) based on minimum mean square error (MMSE) criterion can significantly improve the BER performance of DS- and MC-CDMA signal transmissions in a severe frequency-selective fading channel. However, since the frequency-distorted signal cannot be completely equalized, the residual inter-code interference (ICI) limits the BER performance improvement. In 4G systems, much higher variable rate data services than in the present 3G systems are required. Orthogonal multicode transmission technique has flexibility in offering variable rate services. However, the BER performance degrades as the number of parallel codes increases. In this paper, we propose a frequency-domain soft interference cancellation (FDSIC) for multicode DS- and MC-CDMA signal transmissions and their achievable BER performances are evaluated by computer simulation.
AB - Frequency-domain equalization (FDE) based on minimum mean square error (MMSE) criterion can significantly improve the BER performance of DS- and MC-CDMA signal transmissions in a severe frequency-selective fading channel. However, since the frequency-distorted signal cannot be completely equalized, the residual inter-code interference (ICI) limits the BER performance improvement. In 4G systems, much higher variable rate data services than in the present 3G systems are required. Orthogonal multicode transmission technique has flexibility in offering variable rate services. However, the BER performance degrades as the number of parallel codes increases. In this paper, we propose a frequency-domain soft interference cancellation (FDSIC) for multicode DS- and MC-CDMA signal transmissions and their achievable BER performances are evaluated by computer simulation.
KW - DS-CDMA
KW - Frequency-domain equalization(FDE)
KW - Interference cancellation
KW - MC-CDMA
KW - Multicode
UR - http://www.scopus.com/inward/record.url?scp=34047107204&partnerID=8YFLogxK
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M3 - Conference contribution
AN - SCOPUS:34047107204
SN - 0780393929
SN - 9780780393929
T3 - IEEE Vehicular Technology Conference
SP - 2523
EP - 2527
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 -