{"title":"利用OFDM技术提高FSO链路的性能，并与传统TDM-FSO链路进行比较","authors":"Pravindra Kumar, A. Srivastava","doi":"10.1109/IBP.2015.7230767","DOIUrl":null,"url":null,"abstract":"Free space optical (FSO) communication systems with its high data rate, capacity same as optical fiber and secure communication over unlicensed spectrum have become a promising technology where the installation of optical fiber is not possible. However, bit-error-rate (BER) performance of FSO link depends on the atmospheric conditions and turbulence strength. In this paper, the performance of intensity modulation/direct detection-time division multiplexed-FSO (IM/DD-TDM-FSO) link and IM/DD-orthogonal frequency division multiplexed-FSO (IM/DD-OFDM-FSO) link are analytically compared. BER is expressed assuming the turbulence as Gamma-Gamma distribution. At BER of 10-3, there is 14.7 dB gain in signal-to-noise ratio (SNR) and 7.2 dB improvement in receiver sensitivity with OFDM-FSO link as compared to traditional TDM-FSO link.","PeriodicalId":236981,"journal":{"name":"2015 IEEE International Broadband and Photonics Conference (IBP)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2015-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"12","resultStr":"{\"title\":\"Enhanced performance of FSO link using OFDM and comparison with traditional TDM-FSO link\",\"authors\":\"Pravindra Kumar, A. Srivastava\",\"doi\":\"10.1109/IBP.2015.7230767\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Free space optical (FSO) communication systems with its high data rate, capacity same as optical fiber and secure communication over unlicensed spectrum have become a promising technology where the installation of optical fiber is not possible. However, bit-error-rate (BER) performance of FSO link depends on the atmospheric conditions and turbulence strength. In this paper, the performance of intensity modulation/direct detection-time division multiplexed-FSO (IM/DD-TDM-FSO) link and IM/DD-orthogonal frequency division multiplexed-FSO (IM/DD-OFDM-FSO) link are analytically compared. BER is expressed assuming the turbulence as Gamma-Gamma distribution. At BER of 10-3, there is 14.7 dB gain in signal-to-noise ratio (SNR) and 7.2 dB improvement in receiver sensitivity with OFDM-FSO link as compared to traditional TDM-FSO link.\",\"PeriodicalId\":236981,\"journal\":{\"name\":\"2015 IEEE International Broadband and Photonics Conference (IBP)\",\"volume\":\"7 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2015-04-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"12\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2015 IEEE International Broadband and Photonics Conference (IBP)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/IBP.2015.7230767\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2015 IEEE International Broadband and Photonics Conference (IBP)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/IBP.2015.7230767","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Enhanced performance of FSO link using OFDM and comparison with traditional TDM-FSO link
Free space optical (FSO) communication systems with its high data rate, capacity same as optical fiber and secure communication over unlicensed spectrum have become a promising technology where the installation of optical fiber is not possible. However, bit-error-rate (BER) performance of FSO link depends on the atmospheric conditions and turbulence strength. In this paper, the performance of intensity modulation/direct detection-time division multiplexed-FSO (IM/DD-TDM-FSO) link and IM/DD-orthogonal frequency division multiplexed-FSO (IM/DD-OFDM-FSO) link are analytically compared. BER is expressed assuming the turbulence as Gamma-Gamma distribution. At BER of 10-3, there is 14.7 dB gain in signal-to-noise ratio (SNR) and 7.2 dB improvement in receiver sensitivity with OFDM-FSO link as compared to traditional TDM-FSO link.
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