TY - GEN
T1 - Joint frequency-domain equalization and despreading for DS-CDMA cyclic delay transmit diversity
AU - Yamamoto, Tetsuya
AU - Takeda, Kazuki
AU - Adachi, Fumiyuki
PY - 2008
Y1 - 2008
N2 - Cyclic delay transmit diversity (CDTD) using frequency-domain equalization (FDE) based on the minimum mean squire error (MMSE) criterion is a powerful technique to improve the bit error rate (BER) performance of direct sequence code division multiple access (DS-CDMA) signal transmission in a frequency-selective fading channel. CDTD simultaneously transmits the same signal from different antennas after adding different cyclic delays to increase the number of equivalent propagation paths and hence achieves the larger frequency diversity gain. However, the BER performance of DS-CDMA with CDTD using MMSE-FDE is limited by the residual inter-chip interference (ICI) after FDE. In this paper, we propose a new joint FDE and despreading suitable for CDTD, which can simultaneously perform equalization and despreading in the frequency-domain. We evaluate the achievable BER performance by computer simulation. copyright
AB - Cyclic delay transmit diversity (CDTD) using frequency-domain equalization (FDE) based on the minimum mean squire error (MMSE) criterion is a powerful technique to improve the bit error rate (BER) performance of direct sequence code division multiple access (DS-CDMA) signal transmission in a frequency-selective fading channel. CDTD simultaneously transmits the same signal from different antennas after adding different cyclic delays to increase the number of equivalent propagation paths and hence achieves the larger frequency diversity gain. However, the BER performance of DS-CDMA with CDTD using MMSE-FDE is limited by the residual inter-chip interference (ICI) after FDE. In this paper, we propose a new joint FDE and despreading suitable for CDTD, which can simultaneously perform equalization and despreading in the frequency-domain. We evaluate the achievable BER performance by computer simulation. copyright
KW - Cyclic delay transmit diversity
KW - DS-CDMA
KW - Frequency-domain equalization
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M3 - Conference contribution
AN - SCOPUS:66149094972
SN - 4885522323
SN - 9784885522321
T3 - 2008 14th Asia-Pacific Conference on Communications, APCC 2008
BT - 2008 14th Asia-Pacific Conference on Communications, APCC 2008
T2 - 2008 14th Asia-Pacific Conference on Communications, APCC 2008
Y2 - 14 October 2008 through 16 October 2008
ER -