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

  • 제22권8호
  • /
  • Pages.1632-1642
  • /
  • 1997
  • /
  • 1226-4717(pISSN)
  • /
  • 2287-3880(eISSN)
한국통신학회 (The Korean Institute of Commucations and Information Sciences)
권호 표지

불완전한 전력 제어 셀룰라 DS/CDMA 시스템의 용량 분석

Capacity of DS/CDMA system with imperfect power-control

  • 김준철 (한국통신연구개발본부 무선통신연구소) ;
  • 박진수 (한국통신연구개발본부 무선통신연구소) ;
  • 곽경섭 (인하대학교 전자공학과)
  • 발행 : 1997.08.01
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초록

In this paper, we studied the effects of the power control imperfection on the system performances of a microcellular DS/CDMA system. The maximum user capacity, defined as the maximum number of users can be serviced simultaneouly, meeting a given voice quality, is first considered. Then the performence degradation due to the control error is analyzed. The frequency selective Raician channel model is used to characterize a microcellular mobile communication environment. The DS/CDMA system under consideration uses BPSK modulation and convolutional coding/Viterbe decoding with soft decision for forward error correction. It is shown that the user capacity falls linearly down with the increase of the power control error(in terms of the standard deviation in dB) and the interference from users outside the third tier cells have a minor effect on the performance. And the performance of DS/CDMA with the imperfect power control model is made to be less than 50% of that with perfect power control moded.

키워드

참고문헌

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