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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Single-Fiber Bidirectional Transmission System Using Base Station Without Light Sources

광원이 없는 Base Station을 이용한 단일 광섬유 양방향 전송 시스템

  • 전금수 (전북대학교 전자정보공학부 광통신 연구실, 전북대학교 공학연구원 정보통신연구센터 연구원) ;
  • 정용채 (전북대학교 전자정보공학부 초고주파 회로설계 연구실) ;
  • 임명섭 (전북대학교 전자정보공학부 초고속 데이터 이동통신 연구실) ;
  • 반재경 (전북대학교 전자정보공학부 광통신 연구실, 전북대학교 공학연구원 정보통신연구센터 연구원)
  • Published : 2003.05.01
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Abstract

We have proposed and implemented a novel cost-effective optical subcarrier mutiplexing transceiver for base station without light sources in which optical signal can be transmitted bidirectionally over a single optical fiber. Modulated optical signal is retransmitted from the base station to the central office using a ring-type base station which consists of a circulator and an Mach-Zehnder modulator, where the optical source is supplied from the central office. In order to investigate the feasibility of the proposed base station without light sources, we have measured adjacent channel power ratio and carrier to noise ratio by transmitting the IS-95 CDMA signal and 14 tones carrier signal bidirectionally through the system.

본 논문에서는 광원이 불필요하며 단일 광섬유를 통하여 양방향 전송이 가능한 base station용 광송수신기 모듈을 제안하였다. 제안한 시스템에서는 써큘레이터와 Mach-Zehnder 변조기로 구성된 ring-type의 base station에서 central office로부터 하향 전송된 광신호의 일부를 재사용하여 상향신호 전송에 사용한다. 시스템의 성능을 평가하기 위해서 IS-95 CDMA 신호 전송을 통한 ACPR 특성과 14개의 캐리어 신호 전송을 통한 CNR을 측정하였다.

Keywords

References

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