The Performance Analysis of a DS/CDMA Cellular System considering a Base Station Array Antenna and Imperfect Power Control

기지국 어레이 안테나와 불완전 전력 제어를 고려한 DS/CDMA 셀룰라 시스템의 성능 분석

  • kim, Hyoung-Chae (Dept.of Computer and Communication Engineering, Chungbuk National University) ;
  • Kim, Hang-Rae (Dept.of Computer and Communication Engineering, Chungbuk National University) ;
  • Kim, Nam (Dept.of Computer and Communication Engineering, Chungbuk National University) ;
  • Han, Tae-Young (Jusung College)
  • 김형채 (충북대학교 정보통신공학과) ;
  • 김항래 (충북대학교 정보통신공학과) ;
  • 김남 (충북대학교 정보통신공학과) ;
  • 한태영 (주성대학)
  • Published : 2001.08.01


In this paper, the reverse link performance of a imperfect power controlled DS/CDMA cellular system that uses a base station array antenna which can effectively remove the multiple access interference is analyzed considering both beam forming algorithm and power control error in shadowing. The blocking probability of the DS/CDMA cellular system based on array parameters, $E_b/N_o$ and statistics of interference is derived, and then the system capacity corresponding to a certain blocking probability is calculated. On the assumption that the blocking probability is set 1%, the system capacity using MCGM algorithm with 12 antenna arrays is more increased maximum 32 times than that using a omni-directional antenna and about 2 times than that using MMSE algorithm, respectively.

본 논문은 다중접속 간섭을 효과적으로 제거할 수 있는 기지국 어레이 안테나를 이용하여 전파음영 환경하에서 빔 형성 알고리즘과 전력 제어 오차에 따른 DS/CDMA 셀룰라 시스템의 역방향 링크에 대한 성능을 분석한다. 블로킹(blocking) 확률을 어레이 파라미터와 E$_{b}$/N$_{o}$ 및 간섭 통계를 이용하여 유도하고 특정한 블록킹 확률에 일치하는 시스템 용량을 계산하다. 1%의 블록킹 확률을 가정하였을 경우, 동방성 안테나 1개를 사용하는 경우보다는 12개의 어레이 안테나를 이용한 MCGM 알고리즘을 사용하였을 경우에 약 32배의 시스템 용량이 증가함을 보인다.



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