Title :
PAPR Reduction in MC/DS CDMA System by DFT Spreading Codes
Author :
Li, Yingshan ; Kyung, Ju-Hyun ; Son, Jong-Won ; Ryu, Heung-Gyoon
Author_Institution :
Dept. of Electron. Eng., Chungbuk Nat. Univ.
Abstract :
Multi-carrier direct sequence code division multiple access (MC/DS CDMA) technique is one of the optimum technique for the reverse link mobile transmission. However, because of multi-carrier property, large PAPR (peak to average ratio) may be generated in MC/DS CDMA system. In this paper, DFT spreading code is applied to reduce high PAPR efficiently. As results, about 6 dB PAPR can be achieved at CCDF of 10 -3 in the MC/DS CDMA system with 12 data carriers. SER performance can be improved significantly compared with conventional MC/DS CDMA system with nonlinear HPA
Keywords :
code division multiple access; discrete Fourier transforms; error statistics; mobile radio; spread spectrum communication; DFT spreading codes; MC/DS CDMA system; PAPR reduction; discrete Fourier transform; error statistics; multicarrier direct sequence code division multiple access; peak to average ratio; reverse link mobile transmission; spread spectrum communication; Bandwidth; Bit error rate; Degradation; Discrete Fourier transforms; Dynamic range; High power amplifiers; Multiaccess communication; Nonlinear distortion; OFDM modulation; Peak to average power ratio;
Conference_Titel :
Information Technology and Applications, 2005. ICITA 2005. Third International Conference on
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7695-2316-1
DOI :
10.1109/ICITA.2005.205
