PAPR Reduction in MC/DS CDMA System by DFT Spreading Codes

Yingshan Li,Ju-Hyun Kyung,Jong-Won Son,Heung-Gyoon Ryu

Information Technology and Applications, 2005. ICITA 2005. Third International Conference（2005）

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摘要

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 6dB 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.

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关键词

papr reduction,conventional mc,dft spreading codes,multi-carrier direct sequence code,ds cdma system,optimum technique,data carrier,large papr,ds cdma,average ratio,ser performance,high papr,bit error rate,spread spectrum communication,code division multiple access,ofdm modulation,discrete fourier transform,dynamic range,bandwidth,nonlinear distortion,degradation

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