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Square-Law Combining-Aided SIM/SM for Optical Wireless Communication

광무선 통신을 위한 자승 결합기법을 적용한 SIM/SM

  • Lee, Jeong-Ho (Division of Electronics and Electrical Engineering, Dongguk University-Seoul) ;
  • Hwang, Seung-Hoon (Division of Electronics and Electrical Engineering, Dongguk University-Seoul)
  • Received : 2015.01.31
  • Accepted : 2015.02.16
  • Published : 2015.02.28

Abstract

In this paper, we propose an SIM/SM system with a square-law combining. In an outdoor environment, the performance of SIM/SM deteriorates due to an atmospheric turbulence. The square-law combining technique can enhance the performance of the SIM/SM by employing square-and-integrate operation at the receiver side. For various spectral efficiencies, the performance gain increases as the number of photodetectors increases. Furthermore, as the turbulence strength increases, the performance gain also increases.

본 논문은 SIM/SM에 자승 결합기법을 적용한 시스템을 제안한다. 실외 환경에서 SIM/SM은 대기의 격변에 의한 성능 저하가 발생한다. 자승 결합기법은 수신부에서 다수의 광검출기를 배치하고, 수신 된 각 신호를 제곱하여 합성함으로 격변에 의한 성능 저하를 감소시킬 수 있다. 다양한 주파수 효율에서 광검출기의 수를 증가시킬수록 성능 이득이 커지며, 격변의 세기가 강할수록 더욱 효과적인 성능 개선이 가능함을 확인하였다.

Keywords

References

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