한국통신학회논문지 (The Journal of Korean Institute of Communications and Information Sciences)

  • 제25권7B호
  • /
  • Pages.1320-1325
  • /
  • 2000
  • /
  • 1226-4717(pISSN)
  • /
  • 2287-3880(eISSN)
한국통신학회 (The Korean Institute of Commucations and Information Sciences)
권호 표지

OFDM-CDMA 시스템에서 새로운 PAPR 감쇄기법

New Peak-to-Average Power Ratio Reduction Scheme for an OFKM-CDMA System

  • 주양익 (고려대학교 전자공학과 차세대 이동통신 연구실) ;
  • 이연우 (고려대학교 전자공학과 차세대 이동통신 연구실) ;
  • 차균현 (고려대학교 전자공학과 차세대 이동통신 연구실)
  • 발행 : 2000.07.01
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초록

A very simple and effective peak power reduction scheme for a downlink OFDM-CDMA system is proposed using the relationship between peak-to-average power ratio (PAPR) and out-of-phase autocorrelation. Since power spectrum and autocorrelation function are Fourier transform pair, the PAPR property of the sequences can be estimated by the out-of-phase autocorrelation function of the spreading sequences. Thus, by scrambling the spread data in the frequency domain, we can reduce the sidelobe energy of autocorrelation, and at last, suppress PAPR in the proposed OFDM-CDMA system.

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참고문헌

  1. IEEE Commun. Mag. v.35 no.12 Overview of Multi-Carrier CDMA S. Hara;R. Prasad
  2. Proc. Int. Conf. on Communications(ICC 98) OFDM-CDMA with Peak Power Reduction Based on the Spreading Sequences H. Ochiai;H. Imai
  3. Proc. PIMRC 97 A Novel Peak Power Reduction Scheme for OFDM S. H. Muller;J. B. Huber
  4. Proc. 3rd Int. Symp. Spread Specrum Techniques and Applications(ISSSTA 94) Hadamard Codewords as Orthogonal Spreading Sequences in Synchronous DS CDMA Systems for Mobile Radio Channels M. Schnell
  5. Proc. PIMRC 97 Crest Factor Reduction Using Orthogonal Spreading Codes in Multi-Carrier CDMA Systems L. Freiberg;A. Annamalai;V. K. Bhargava
  6. IEEE Trans. on Commun. v.47 no.6 Spreading Sequences for Multicarrier CDMA Systems B. M. Popovic
  7. IRE Trans. Inform. Theory v.IT-7 Complementary series M. J. E. Golay
  8. IEEE Trans. on Commun. v.COM-25 no.8 Performance Evaluation for Phase-Coded Spread-Spectrum Multiple-Access Communication - Part I : System Analysis M. B. Pursley