대한전자공학회:학술대회논문집 (Proceedings of the IEEK Conference)

대한전자공학회 (The Institute of Electronics and Information Engineers)
권호 표지

적응형 부채널 할당 방법과 M진 직교 신호화를 사용하는 MC-CDMA 시스템의 성능 분석

Performance analysis of MC-CDMA system with Adaptive subchannel scheme and M-ary orthogonal signaling

  • 박경숙 (충북대학교 정보통신공학과) ;
  • 김항래 (충북대학교 정보통신공학과) ;
  • 김남 (충북대학교 정보통신공학과)
  • Park, Kyoung-Suk (Dept. of Computer & Communication Eng., Chungbuk National Univ.) ;
  • Kim, Hang-Rae (Dept. of Computer & Communication Eng., Chungbuk National Univ.) ;
  • Kim, Nam (Dept. of Computer & Communication Eng., Chungbuk National Univ.)
  • 발행 : 2000.11.01
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초록

In this paper, the performance of a MC-CDMA system applying adaptive subchannel allocation scheme and M-ary orthogonal signaling is analyzed for forward links in Rayleigh fading channel. In the proposed system, each DS waveform is transmitted over the subchannel having the biggest fading among L subchannels. Assuming M-ary orthogonal signaling and 4 subchannels, the BER of 10$\^$-3/ is satisfied if SNRs are 7.33 ㏈, 5.33 ㏈, and 4.47 ㏈ for k=1, 2, and 3, respectively. Also, SNRs which met BER of 10$\^$-3/ are 1.42 ㏈ and 2.33 ㏈ in L=2 and L=8 as k=1 is increased to k=2. It is shown that the MC-CDMA system has performance improvement as a number of subcarriers and M-ary orthogonal signaling.

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