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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
권호 표지

Capacity of DS/CDMA system with imperfect power-control

불완전한 전력 제어 셀룰라 DS/CDMA 시스템의 용량 분석

  • 김준철 (한국통신연구개발본부 무선통신연구소) ;
  • 박진수 (한국통신연구개발본부 무선통신연구소) ;
  • 곽경섭 (인하대학교 전자공학과)
  • Published : 1997.08.01
Download PDF
⟨ Previous Next ⟩

Abstract

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.

Keywords

References

  1. IEEE trans. Comm. v.COM-30 no.5 Theory of Spread Spectrum Communications-A Tutorial Raymond L. Pickholtz(et al.)
  2. IEEE Trans. Vehiulat Tech. v.40 no.2 On the Capacity of a Celular CDMA System Klein S. Gilhousen(et al.)
  3. IEEE J. Select. Area. Comm. v.10 no.4 Performance Evaluation for Cellular CDMA Laurence B. Milstein(et al.)
  4. IEICE Trans. On Fundamentals v.E78A no.7 Performance Evaluation for Cellular DS/CDMA System over Frequency-Selective Fading Channel Kyung Sup Kwak;Gyoo Guen Kim
  5. Proc. JTC-CSCC'95 Capacity of Imperfectly Power-controlled DS/CDMA System over Frequency-selective Rician Fading Channel Jun Chul Kim;Kyung Sup Kwak
  6. IEEE Trans. Comm. v.COM-30 no.1 Performance of a Spread Spectrum Communication System Operating OVer a Frequency-Selective Fading Channel in the Presence of Tone Interference Laurence B. Milstein(et al.)
  7. Mobile Communication sDesign Fundamentals(2nd Edition) William C. Lee
  8. Digital Communication and Spread Spectrum Systems Rodger E. Ziemer;Roger L. Peterson
  9. Digital Communications(2nd ed.) J. G. Proakis
  10. TIA/EIA/IS-95 Mobile Station-base Station Compatibility Standard for Dual-Mode Wideband Spread Spectrum Cellular System Telecommunication Industry Association
  11. Probability and Random Processes for Electrical Engineering(2nd ed.) Alberto Leon-Garcia
  12. IEEE J. Select. Area. Comm v.11 no.6 Erlang Capacity of a Power controlled CDMA System Audrey M. Viterbi;Andrew J. Viterbi
  13. IEEE Trans. Vehiular Teh v.44 no.1 Capacity,Throughput and Delay Analysis of a Cellular DS CDMA System With Imperfect Power Control and Imperfect Sectorization Michel G. jansen;Ramjee Prasad
  14. IEEE J. Select. Area. Comm. v.12 no.4 The Capacity of a Spread Spectrum CDMA System for Cellular Mobile Radio with Consideration of System Imperfections Paul newson;Mark R. Heath