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PAPR Reduction Method in Multi-Code CDMA System  

이강미 (충북대학교 전자공학과 및 컴퓨터정보통신연구소)
김상우 (충북대학교 전자공학과 및 컴퓨터정보통신연구)
유흥균 (충북대학교 전자공학과 및 컴퓨터정보통신연구소)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.15, no.7, 2004 , pp. 685-691 More about this Journal
Abstract
In this paper, we propose the hybrid methods of SLM(selected mapping) and predistortion, and PTS(partial transmit sequence) and predistortion to reduce PAPR(peak to average power ratio) and to decrease the nonlinear distortion of the nonlinear HPA(high power amplifier) in the multi-code CDMA(code division multiple access) system. The phase rotation factors are transmitted as side information in PTS and SLM methods play an important role in the BER performance. So, we present the theoretical BER equation when the errors of side information are considered in the multi-code CDMA communication system. Simulation results show that PAPR is reduced and nonlinear distortion is compensated by hybrid methods. Therefore BER performance is enhanced.
Keywords
Nonlinear HPA; Power Efficiency; PAPR; Multi-Code CDMA;
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