TY - GEN
T1 - Application of cyclic delay transmit diversity to uplink 2-dimensional block spread CDMA with frequency-domain equalization
AU - Yu, Qiyue
AU - Meng, Weixiao
AU - Liu, Bo
AU - Adachi, Fumiyuki
PY - 2009
Y1 - 2009
N2 - The presence of the multi-access interference (MAI) limits the uplink performance of code division multiple access (CDMA). 2-dimensional (2D) block spread CDMA makes it possible to achieve MAI free uplink transmission while obtaining the frequency diversity gain by using low-complexity single-user frequency-domain equalization (FDE). To further improve the uplink transmission performance, the transmit diversity technique can be used. Cyclic delay transmit diversity (CDTD) can strengthen the frequency-selectivity of the channel. In this paper, we apply CDTD to 2D block spread CDMA with MMSE-FDE. The achievable uplink BER performance is evaluated by computer simulation for both direct sequence CDMA and multi-carrier CDMA. It is shown that CDTD can offer improved uplink BER performance in a frequency-selective uplink channel.
AB - The presence of the multi-access interference (MAI) limits the uplink performance of code division multiple access (CDMA). 2-dimensional (2D) block spread CDMA makes it possible to achieve MAI free uplink transmission while obtaining the frequency diversity gain by using low-complexity single-user frequency-domain equalization (FDE). To further improve the uplink transmission performance, the transmit diversity technique can be used. Cyclic delay transmit diversity (CDTD) can strengthen the frequency-selectivity of the channel. In this paper, we apply CDTD to 2D block spread CDMA with MMSE-FDE. The achievable uplink BER performance is evaluated by computer simulation for both direct sequence CDMA and multi-carrier CDMA. It is shown that CDTD can offer improved uplink BER performance in a frequency-selective uplink channel.
KW - 2-dimensional block CDMA
KW - CDTD
KW - Fading channel
KW - MAI
UR - http://www.scopus.com/inward/record.url?scp=77952858924&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77952858924&partnerID=8YFLogxK
U2 - 10.1109/PIMRC.2009.5449845
DO - 10.1109/PIMRC.2009.5449845
M3 - Conference contribution
AN - SCOPUS:77952858924
SN - 9781424451234
T3 - IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
BT - 2009 IEEE 20th Personal, Indoor and Mobile Radio Communications Symposium, PIMRC 2009
T2 - 2009 IEEE 20th Personal, Indoor and Mobile Radio Communications Symposium, PIMRC 2009
Y2 - 13 September 2009 through 16 September 2009
ER -