Performance Improvement for Mixed RF–FSO Communication System by Adopting Hybrid Subcarrier Intensity Modulation
The improvement for hybrid<b> </b>radio frequency−free space optical (RF−FSO) communication system<b> </b>in wireless optical communications has acquired growing interests in recent years, but rarely improvement is based on hybrid modulation. Therefore, we...
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MDPI AG
2019-09-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/9/18/3724 |
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| author | Ting Jiang Lin Zhao Hongzhan Liu Dongmei Deng Aiping Luo Zhongchao Wei Xiangbo Yang |
| author_facet | Ting Jiang Lin Zhao Hongzhan Liu Dongmei Deng Aiping Luo Zhongchao Wei Xiangbo Yang |
| author_sort | Ting Jiang |
| collection | DOAJ |
| description | The improvement for hybrid<b> </b>radio frequency−free space optical (RF−FSO) communication system<b> </b>in wireless optical communications has acquired growing interests in recent years, but rarely improvement is based on hybrid modulation. Therefore, we conduct a research on end-to-end mixed RF−FSO system with the hybrid pulse position modulation−binary phase shift keying−subcarrier intensity modulation (PPM−BPSK−SIM) scheme. The RF link obeys Rayleigh distribution and the FSO link experiences Gamma−Gamma distribution. The average bit error rate (BER) for various PPM−BPSK−SIM schemes has been derived with consideration of atmospheric turbulence influence and pointing error condition. The outage probability and the average channel capacity of the system are discussed as well. Simulation results indicate that the pointing error aggravates the influence of atmospheric turbulence on the channel capacity, and the RF−FSO systematic performance is improved obviously while adopting PPM−BPSK−SIM under strong turbulence and severe pointing error conditions, especially, when the system average symbol length is greater than eight. |
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| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-13T12:19:41Z |
| publishDate | 2019-09-01 |
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| series | Applied Sciences |
| spelling | doaj.art-64c7ce6210c4498b9ab42ef855268a5c2022-12-21T23:46:37ZengMDPI AGApplied Sciences2076-34172019-09-01918372410.3390/app9183724app9183724Performance Improvement for Mixed RF–FSO Communication System by Adopting Hybrid Subcarrier Intensity ModulationTing Jiang0Lin Zhao1Hongzhan Liu2Dongmei Deng3Aiping Luo4Zhongchao Wei5Xiangbo Yang6Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, Guangzhou 510006, ChinaGuangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, Guangzhou 510006, ChinaGuangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, Guangzhou 510006, ChinaGuangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, Guangzhou 510006, ChinaGuangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, Guangzhou 510006, ChinaGuangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, Guangzhou 510006, ChinaGuangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, Guangzhou 510006, ChinaThe improvement for hybrid<b> </b>radio frequency−free space optical (RF−FSO) communication system<b> </b>in wireless optical communications has acquired growing interests in recent years, but rarely improvement is based on hybrid modulation. Therefore, we conduct a research on end-to-end mixed RF−FSO system with the hybrid pulse position modulation−binary phase shift keying−subcarrier intensity modulation (PPM−BPSK−SIM) scheme. The RF link obeys Rayleigh distribution and the FSO link experiences Gamma−Gamma distribution. The average bit error rate (BER) for various PPM−BPSK−SIM schemes has been derived with consideration of atmospheric turbulence influence and pointing error condition. The outage probability and the average channel capacity of the system are discussed as well. Simulation results indicate that the pointing error aggravates the influence of atmospheric turbulence on the channel capacity, and the RF−FSO systematic performance is improved obviously while adopting PPM−BPSK−SIM under strong turbulence and severe pointing error conditions, especially, when the system average symbol length is greater than eight.https://www.mdpi.com/2076-3417/9/18/3724free space optical (FSO)pulse position modulation–binary phase shift keying–subcarrier intensity modulation (PPM–BPSK–SIM)bit error rate (BER)pointing erroraverage symbol length |
| spellingShingle | Ting Jiang Lin Zhao Hongzhan Liu Dongmei Deng Aiping Luo Zhongchao Wei Xiangbo Yang Performance Improvement for Mixed RF–FSO Communication System by Adopting Hybrid Subcarrier Intensity Modulation Applied Sciences free space optical (FSO) pulse position modulation–binary phase shift keying–subcarrier intensity modulation (PPM–BPSK–SIM) bit error rate (BER) pointing error average symbol length |
| title | Performance Improvement for Mixed RF–FSO Communication System by Adopting Hybrid Subcarrier Intensity Modulation |
| title_full | Performance Improvement for Mixed RF–FSO Communication System by Adopting Hybrid Subcarrier Intensity Modulation |
| title_fullStr | Performance Improvement for Mixed RF–FSO Communication System by Adopting Hybrid Subcarrier Intensity Modulation |
| title_full_unstemmed | Performance Improvement for Mixed RF–FSO Communication System by Adopting Hybrid Subcarrier Intensity Modulation |
| title_short | Performance Improvement for Mixed RF–FSO Communication System by Adopting Hybrid Subcarrier Intensity Modulation |
| title_sort | performance improvement for mixed rf fso communication system by adopting hybrid subcarrier intensity modulation |
| topic | free space optical (FSO) pulse position modulation–binary phase shift keying–subcarrier intensity modulation (PPM–BPSK–SIM) bit error rate (BER) pointing error average symbol length |
| url | https://www.mdpi.com/2076-3417/9/18/3724 |
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