강도변조/직접검파 광통신 수신기에서 심벌간 간섭을 고려할 경우 타이밍 지터에 의한 잔력 페널티 해석

Analysis on power penalty due to timing jitters when considering intersymbol interference in the receivers on intensity modulation/direct detection optical communication systems

In this paper, we propose a new method to analyze the performance degradation by timing jitters in the receivers of intensity modulation/direct detection digital optical communication systems where pulse-shaping filters are used to minimize intersymbol interference. The results obtained from the proposed analytical method show that conventional analytical methods underestimate the influence of timing jitters on the receiver performance. Using the proposed anlaytical method, we derive an analytic equation for approximated power penalty due to timing itters and obtain an exact power penalty by numerical analyses. Assuming Gaussian or uniform probability density function for timing jitters, we also show that assumption of Gaussian distribution for timing jitters yields more performance degration than that of uniform distribution.