Title :
MC-CDMA systems with cyclic shift spreading codes transmit diversity over two-ray Rayleigh fading channels
Author :
Fan, Lingtao ; Chen, Jim
Author_Institution :
SJTU Digital Technol. Res. Center, Shanghai Jiao Tong Univ., China
Abstract :
Transmit diversity is one of the best approaches to combat the fading channels in high data rate wireless systems. We present a new transmit diversity scheme for MC-CDMA systems. It is composed of multiple transmission branches. Each branch transmits the same data symbol synchronously with the same spread code but with different delay. A RAKE receiver is employed in the frequency domain to obtain space diversity gains. Analysis and simulation results show that performance benefits can be achieved compared to conventional MC-CDMA systems in Rayleigh fading channels.
Keywords :
Rayleigh channels; code division multiple access; codes; data communication; delays; diversity reception; multipath channels; multiuser channels; radio receivers; spread spectrum communication; MC-CDMA systems; RAKE receiver; cyclic shift spreading codes transmit diversity; delay; frequency domain; high data rate wireless systems; multipath channel; multiple transmission branches; simulation results; space diversity gain; spread code; synchronous data symbol transmission; two-ray Rayleigh fading channels; Delay; Diversity methods; Diversity reception; Fading; Frequency domain analysis; Multiaccess communication; Multicarrier code division multiple access; Multipath channels; Performance analysis; RAKE receivers;
Conference_Titel :
Communication Systems, 2002. ICCS 2002. The 8th International Conference on
Print_ISBN :
0-7803-7510-6
DOI :
10.1109/ICCS.2002.1182464
