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Average BER analysis of SCM-based free-space optical systems by considering the effect of IM3 with OSSB signals under turbulence channels터뷸런스 채널 하에서 IM3의 효과를 고려한 SCM 기반 FSO 시스템의 평균 BER 분석에 관한 연구
- Other Titles
- 터뷸런스 채널 하에서 IM3의 효과를 고려한 SCM 기반 FSO 시스템의 평균 BER 분석에 관한 연구
- Issue Date
- 1-11월-2009
- Publisher
- OSA
- Keywords
- FSO; SCM; Intermodulation; Optical system; Turbulence channel
- Citation
- Optics Express, v.17, no.23, pp 20721 - 20726
- Pages
- 6
- Journal Title
- Optics Express
- Volume
- 17
- Number
- 23
- Start Page
- 20721
- End Page
- 20726
- ISSN
- 1094-4087
- Abstract
- In this paper, we derive the average bit error rate (BER) of subcarrier multiplexing (SCM)-based free space optics (FSO) systems using a dual-drive Mach-Zehnder modulator (DD-MZM) for optical single-sideband (OSSB) signals under atmospheric turbulence channels. In particular, we consider the third-order intermodulation (IM3), a significant performance degradation factor, in the case of high input signal power systems. The derived average BER, as a function of the input signal power and the scintillation index, is employed to determine the optimum number of SCM users upon the designing FSO systems. For instance, when the user number doubles, the input signal power decreases by almost 2 dBm under the log-normal and exponential turbulence channels at a given average BER.
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