한국정보통신설비학회:학술대회논문집

Korea Institute of Information and Telecommunication Facilities Engineering (한국정보통신설비학회)
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Performance Analysis of 1.8GHz CDMA 1x Reverse Link including Tower Mount LNA

Tower Mount LNA 장착에 따른 CDMA PCS 기지국의 역방향 성능 분석

  • 박상현 (중앙대학교 전자공학과 광전자 및 광통신연구실) ;
  • 최영완 (중앙대학교 전자공학과 광전자 및 광통신연구실) ;
  • 윤영상 (에이스테크놀로지 RF연구소) ;
  • 장재선 ((주)케이티프리텔 N/W연구소 Access망 연구팀)
  • Published : 2003.08.01
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Abstract

In this paper, we focused on the performance of reverse link in 1.8GHz CDMA 1x system including the Tower-Mount LNA in an urban environment. In order to study the benefit of TMLNA, Hata model is used and the effects of multiple cells are considered. Cell coverage extension ratio is proportional to the increased gain of TMLNA in CDMA cell site. However the cell coverage is not extended even if the noise figure of TMLNA is reduced in an urban area. When typical RSSI is between -70dBm and -80dBm, the increased gain and the reduced NF of TMLNA are not impact to the pole capacity of cell site. Namely, the benefit of TMLNA in an urban area is not the problem of capacity but the proble of sensitivity. The results are also shown that reverse link $E_b/N_o$ is improved by minimum 5dB and BER is lower than $10^{-6}$.

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