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Performance Investigation of Space-Time Block Coded Multicarrier DS-CDMA in Time-Varying Channels
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  • Performance Investigation of Space-Time Block Coded Multicarrier DS-CDMA in Time-Varying Channels
  • Performance Investigation of Space-Time Block Coded Multicarrier DS-CDMA in Time-Varying Channels
저자명
Narzullaev. Anvar,Ryu. Kwan-Woong,Park. Yong-Wan
간행물명
ETRI journal
권/호정보
2006년|28권 5호|pp.684-687 (4 pages)
발행정보
한국전자통신연구원
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
서지반출

기타언어초록

In this letter, we evaluate the system performance of a space-time block coded (STBC) multicarrier (MC) DS-CDMA system over a time selective fading channel, with imperfect channel knowledge. The average bit error rate impairment due to imperfect channel information is investigated by taking into account the effect of the STBC position. We consider two schemes: STBC after spreading and STBC before spreading in the MC DS-CDMA system. In the scheme with STBC after spreading, STBC is performed at the chip level; in the scheme with STBC before spreading, STBC is performed at the symbol level. We found that these two schemes have various channel estimation errors, and that the system with STBC before spreading is more sensitive to channel estimation than the system with STBC after spreading. Furthermore, derived results prove that a high spreading factor (SF) in the MC DS-CDMA system with STBC before spreading leads to high channel estimation error, whereas for a system with STBC after spreading this statement is not true.