Performance Analysis of Quasi-synchronous MC-CDMA and MC-DS/CDMA in Mobile Satellite Return Link

이동위성 리턴링크에서 준동기 MC-CDMA와 MC-DS/CDMA 성능 분석

  • 안치훈 (연세대학교 전기전자공학과) ;
  • 최영관 (연세대학교 전기전자공학과) ;
  • 이호진 (한국전자통신연구원) ;
  • 김동구 (연세대학교 전기전자공학과)
  • Published : 2003.08.01

Abstract

We analyze the performance of MC-CDMA and MC-DS/CDMA system on quasi-synchronized moble satellite return link. Quasi-synchronization is considered that chip offset between terminals is within a few chips. In 10-3 BER, performance of MC-DS/CDMA system with walsh code is 0.3dB better than that of MC-CDMA system when the number of user is 5 from -0.5 $T_{c}$ to 0.5 $T_{c}$ quasi-synchronization of MC-DS/CDMA system and from -5/64 $T_{c}$ $^{MC}$ to 5/64 $T_{c}$ $^{MC}$ quasi-synchronization of MC-CDMA system. MC-DS/CDMA system with walsh code is over 0.2dB better than that of MC-DS/CDMA system with extended m code and gold code. MC-CDMA system with walsh code is over 1.2dB better than that of MC-CDMA system with gold code when the number of user is 5 and lower than from -5/32 $T_{c}$ $^{MC}$ to 5/32 $T_{c}$ $^{MC}$ quasi-synchronization.

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