{"title":"考虑强大气湍流和指向误差的OFDM光DQPSK FSO链路性能分析","authors":"M. Islam, S. Majumder","doi":"10.1109/ICTP48844.2019.9041706","DOIUrl":null,"url":null,"abstract":"In this article, we investigate the effect of pointing error on the performance of an orthogonal frequency division multiplexed (OFDM) optical differential quadrature phase shift keying (DQPSK) modulated FSO system. Analytical approach is developed to find the expressions for output current and SNR in presence of strong atmospheric turbulence with pointing error. The conditional bit error rate for a given turbulence induced fadingand pointing error is also derived. Average BER is obtained by averaging the conditional BER over the pdf of pointing error along with thepdf of turbulence induced fading to be Gamma-Gamma distribution. It is clearly observed that the proposed system suffers almost 1.95dB and 1.25dB power penalty due to normalized pointing error standard deviation2 and 1.5 respectively against strong turbulence and 1.7dB and 1.05dB power penalty due to normalized pointing error standard deviation2 and 1.5 respectively against weak turbulence at aBER of 10−9. Results also show that the allowable link distance reduce drastically due to the combined effect of strong turbulence and pointing error.","PeriodicalId":127575,"journal":{"name":"2019 IEEE International Conference on Telecommunications and Photonics (ICTP)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Performance Analysis of an OFDM Optical DQPSK FSO Link considering Strong Atmospheric Turbulence with Pointing Error\",\"authors\":\"M. Islam, S. Majumder\",\"doi\":\"10.1109/ICTP48844.2019.9041706\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In this article, we investigate the effect of pointing error on the performance of an orthogonal frequency division multiplexed (OFDM) optical differential quadrature phase shift keying (DQPSK) modulated FSO system. Analytical approach is developed to find the expressions for output current and SNR in presence of strong atmospheric turbulence with pointing error. The conditional bit error rate for a given turbulence induced fadingand pointing error is also derived. Average BER is obtained by averaging the conditional BER over the pdf of pointing error along with thepdf of turbulence induced fading to be Gamma-Gamma distribution. It is clearly observed that the proposed system suffers almost 1.95dB and 1.25dB power penalty due to normalized pointing error standard deviation2 and 1.5 respectively against strong turbulence and 1.7dB and 1.05dB power penalty due to normalized pointing error standard deviation2 and 1.5 respectively against weak turbulence at aBER of 10−9. Results also show that the allowable link distance reduce drastically due to the combined effect of strong turbulence and pointing error.\",\"PeriodicalId\":127575,\"journal\":{\"name\":\"2019 IEEE International Conference on Telecommunications and Photonics (ICTP)\",\"volume\":\"3 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2019-12-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2019 IEEE International Conference on Telecommunications and Photonics (ICTP)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ICTP48844.2019.9041706\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2019 IEEE International Conference on Telecommunications and Photonics (ICTP)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICTP48844.2019.9041706","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Performance Analysis of an OFDM Optical DQPSK FSO Link considering Strong Atmospheric Turbulence with Pointing Error
In this article, we investigate the effect of pointing error on the performance of an orthogonal frequency division multiplexed (OFDM) optical differential quadrature phase shift keying (DQPSK) modulated FSO system. Analytical approach is developed to find the expressions for output current and SNR in presence of strong atmospheric turbulence with pointing error. The conditional bit error rate for a given turbulence induced fadingand pointing error is also derived. Average BER is obtained by averaging the conditional BER over the pdf of pointing error along with thepdf of turbulence induced fading to be Gamma-Gamma distribution. It is clearly observed that the proposed system suffers almost 1.95dB and 1.25dB power penalty due to normalized pointing error standard deviation2 and 1.5 respectively against strong turbulence and 1.7dB and 1.05dB power penalty due to normalized pointing error standard deviation2 and 1.5 respectively against weak turbulence at aBER of 10−9. Results also show that the allowable link distance reduce drastically due to the combined effect of strong turbulence and pointing error.
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