Journal of the Institute of Electronics Engineers of Korea TC (대한전자공학회논문지TC)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Performance Analysis of ASK-SSB and PSK-SSB Modulation Format in High-Speed and High-Density WDM Transmission Systems

고속 고밀도 WDM 광전송 시스템에서의 ASK-SSB와 PSK-SSB 변조 방식의 성능 분석

  • Park Jin-Young (Division of Electrical and Computer Engineering, Hanyang University) ;
  • Choi Yoon-Hee (Division of Electrical and Computer Engineering, Hanyang University) ;
  • Park Sang-Gyu (Division of Electrical and Computer Engineering, Hanyang University)
  • 박진영 (한양대학교 전자통신전파공학과) ;
  • 최윤희 (한양대학교 전자통신전파공학과) ;
  • 박상규 (한양대학교 전자전기컴퓨터공학과)
  • Published : 2004.12.01
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Abstract

This research investigates the performance of the optical transmissions systems using the SSB modulation format The focus was on the spectral efficiency of the WDM systems and the transmission penalties due to the fiber nonlinearities. By investigating the performance obtained with ideal SSB signal, we set the upper limit of the performance which can be obtained by SSB technology. Furthermore, we investigated the performance obtainable with SSB signals which can be generated with realizable devices. Since SSB formats are more susceptible to the fiber nonlinearities, SSB formats exhibited inferior transmission performances compared to the DSB format. However, within the 500~1000 km transmission range, which is the focus of this research, it was found that the WDM systems with 12.5 GHz channel spacings might benefit from the SSB modulation techniques.

본 논문에서는 SSB 변조를 이용한 광전송 시스템의 주파수 효율성 및 비선형성에 대한 저항성 등을 규명하였다. 이상적인 SSB 신호를 사용하여 도달할 수 있는 성능의 한계를 확인하는 한편, 실제 제작이 가능한 SSB 변조기가 생성할 수 있는 신호에서 얻을 수 있는 성능을 컴퓨터 시뮬레이션을 통하여 살펴보았다. 이를 통해 SSB 변조된 신호는 일반적으로 DSB 변조된 신호에 비해서 광섬유의 비선형성에 취약하나 본 연구에서 목표로 삼고 있는 전송거리가 500～1000 km 미만인 12.5 GHz 채널 간격의 WDM 시스템에서는 SSB 신호가 DSB 신호에 비해 우수한 성능을 보일 수 있음을 확인하였다.

Keywords

References

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