Journal of the Institute of Electronics Engineers of Korea TC (대한전자공학회논문지TC)

The Institute of Electronics and Information Engineers (대한전자공학회)
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An Adaptive Transmission Scheme for the Forward Links of Multicarrier CDMA Systems

여러 반송파 부호분할 다중접속 방식의 순방향에서의 적응 보냄 방식

  • Kim, Yun-Hee (Department of Electrical Engineering Korea Advanced Institute of Science and Technology) ;
  • Won, Dae-Han (Department of Electrical Engineering Korea Advanced Institute of Science and Technology) ;
  • Song, Iick-Ho (Department of Electrical Engineering Korea Advanced Institute of Science and Technology) ;
  • Yoon, Seok-Ho (Department of Electrical Engineering Korea Advanced Institute of Science and Technology) ;
  • Park, So-Ryoung (Department of Electrical Engineering Korea Advanced Institute of Science and Technology)
  • 김윤희 (韓國科學技術院 電氣 및 電子工學科) ;
  • 원대한 (韓國科學技術院 電氣 및 電子工學科) ;
  • 송익호 (韓國科學技術院 電氣 및 電子工學科) ;
  • 윤석호 (韓國科學技術院 電氣 및 電子工學科) ;
  • 박소영 (韓國科學技術院 電氣 및 電子工學科)
  • Published : 2000.01.01
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Abstract

In this paper, we propose a multicarrier CDMA system with an adaptive subchannel allocation method for forward links. In the proposed system, instead of transmitting identical DS waveforms over a number of subchannels in parallel, each user's DS waveform is transmitted over the user's favorite subchannel which has the largest fading amplitude among all the subchannels. The proposed system is shown to have performance gain over the conventional multicarrier DS/CDMA system. We also investigate how the performance is influenced when the signal is not perfectly allocated into the best subchannel.

이 논문에서는, 순방향에서 적응 부채널 배정 방식을 쓰는 여러 반송파 부호분할 다중접속 방식을 제안한다. 제안한 시스템에서는, 한 직접 수열 파형을 여러 부채널에 나란히 보내는 대신, 쓰는이의 직접 수열 파형을 모든 부채널 가운데에서 감쇄 진폭이 가장 큰 부채널로 (채널 상태가 가장 좋은 부채널) 보낸다. 제안한 시스템의 성능과 이제까지의 여러 반송파 직접 수열 부호분할 다중접속 시스템의 성능을 견주어 본다. 또한, 신호가 가장 좋은 부채널에 정확히 배정되지 않았을 때 성능이 어떻게 바뀌는 지도 살펴본다.

Keywords

References

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