Title :
The bandwidth efficiency increasing method of multi-carrier CDMA and its performance evaluation in comparison with DS-CDMA with RAKE receivers
Author :
Oh, Jung-yeol ; Lim, Myoung-seob
Author_Institution :
Dept. of Inf. & Commun. Eng., Chonbuk Nat. Univ., Chonju, South Korea
Abstract :
It is necessary to devise the method for increasing the bandwidth efficiency in order to provide the high speed mobile multimedia communication services with CDMA under the limited radio bandwidth resources. In this paper the structure for transmitting the high-speed data at the half bandwidth of the required bandwidth using the symmetry property of the IFFT output of the binary input MC-CDMA, which enables the time scaling method utilized, is proposed. The processing gain is increased 4 times than the DS-CDMA and its performance is evaluated to be compared with DS-CDMA with RAKE receivers under the Rayleigh fading channel and same bandwidth per one channel
Keywords :
Rayleigh channels; code division multiple access; data communication; fast Fourier transforms; inverse problems; land mobile radio; multimedia communication; multiuser channels; radio receivers; spread spectrum communication; DS-CDMA; IFFT output; RAKE receivers; Rayleigh fading channel; bandwidth efficiency increasing method; binary input MC-CDMA; high speed mobile multimedia communication services; high-speed data transmission; multi-carrier CDMA; performance evaluation; processing gain; radio bandwidth resources; symmetry property; time scaling method; Bandwidth; Baseband; Discrete Fourier transforms; Fading; Mobile communication; Multiaccess communication; Multicarrier code division multiple access; Multipath channels; OFDM modulation; Radio transmitters;
Conference_Titel :
Vehicular Technology Conference, 1999 IEEE 49th
Conference_Location :
Houston, TX
Print_ISBN :
0-7803-5565-2
DOI :
10.1109/VETEC.1999.778118
