Title :
M-ary MC CDMA in uplink for next generation mobile communication
Author :
Wen, Lin ; Zhu, Jinkang ; Costa, Elena ; Weckerle, Martin
Author_Institution :
Personal Commun. Network & Spread Spectrum Lab., Univ. of Sci. & Technol. of China, Hefei, China
Abstract :
In this paper we propose an M-ary MC CDMA scheme, which might be seen as a potential candidate for uplink mobile transmission. The M-ary MC CDMA provides variable data rates and a high spectral efficiency in MC uplinks. The transmitted data bits are serial to parallel converted and assigned to a number of parallel groups. In each group, several data bits are mapped to a certain frequency using M-ary modulation. Additionally, direct sequence spread spectrum modulation is used for the transmission on the chosen orthogonal frequency. The data groups and user signals are separated by using different group and user specific PN (Pseudo Noise) sequences. The BER performance in uplink channels with Rayleigh fading is also shown by computer simulations.
Keywords :
OFDM modulation; Rayleigh channels; code division multiple access; error statistics; frequency modulation; mobile radio; pseudonoise codes; random sequences; spread spectrum communication; BER performance; M-ary MC CDMA; PN sequence; Rayleigh fading channel; data bit transmission; direct sequence spread spectrum modulation; frequency M-ary modulation; next generation mobile communication; orthogonal frequency transmission; pseudo noise sequence; serial-parallel conversion; spectral efficiency; uplink mobile transmission; variable data rate; Bandwidth; Electronic mail; Frequency modulation; Intelligent networks; Mobile communication; Multiaccess communication; Multiple access interference; OFDM; Personal communication networks; Spread spectrum communication;
Conference_Titel :
Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th
Print_ISBN :
0-7803-7954-3
DOI :
10.1109/VETECF.2003.1285990
