Performance Analysis of IRS-Assisted Multi-Link FSO System Under Pointing Errors
The integration of intelligent reflecting surfaces (IRS) into free-space optical (FSO) communication systems is considered as a promising and innovative approach to overcoming existing challenges due to the strict line-of-sight (LoS) requirements faced by conventional FSO setups, thereby ensuring mo...
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| Language: | English |
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IEEE
2024-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/10561472/ |
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| author | Takumi Ishida Chedlia Ben Naila Hiraku Okada Masaaki Katayama |
| author_facet | Takumi Ishida Chedlia Ben Naila Hiraku Okada Masaaki Katayama |
| author_sort | Takumi Ishida |
| collection | DOAJ |
| description | The integration of intelligent reflecting surfaces (IRS) into free-space optical (FSO) communication systems is considered as a promising and innovative approach to overcoming existing challenges due to the strict line-of-sight (LoS) requirements faced by conventional FSO setups, thereby ensuring more flexible and controllable links and expanding the communication coverage area. Nonetheless, the configuration of IRS-assisted FSO systems remains relatively novel, requiring investigation into optimizing IRS placement to enhance system performance while mitigating interference and obstacles in dynamic environmental conditions. This work aims to evaluate the improvement of the system performance achieved through optimized IRS positioning while accounting for the main degrading factors inherent in FSO systems and IRS design. We present a comprehensive model for a multilink terrestrial IRS-assisted FSO system, taking into consideration key degrading factors such as pointing errors stemming from both transmitter and IRS jitter, IRS dimensions, and turbulence-induced fading. Furthermore, we derive closed-form expressions for the probability density function of channel coefficients, average bit error rate, and outage probability. Our results indicate that optimal IRS placement is in proximity to the transmitter, taking into account all channel impairments. Furthermore, we showed that optimal IRS placement tends to shift towards the receiver side as the IRS jitter increases. Consequently, the analysis presented offers valuable insights for efficiently designing IRS-assisted FSO systems, particularly regarding IRS placement in the presence of pointing errors. |
| format | Article |
| id | doaj-art-acd3001cd6684b25b613f11f0b284196 |
| institution | Kabale University |
| issn | 1943-0655 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-acd3001cd6684b25b613f11f0b2841962025-01-24T00:00:37ZengIEEEIEEE Photonics Journal1943-06552024-01-0116411010.1109/JPHOT.2024.341620110561472Performance Analysis of IRS-Assisted Multi-Link FSO System Under Pointing ErrorsTakumi Ishida0https://orcid.org/0009-0002-6361-482XChedlia Ben Naila1https://orcid.org/0000-0002-0556-2745Hiraku Okada2https://orcid.org/0000-0003-2276-6421Masaaki Katayama3https://orcid.org/0000-0002-7612-390XDepartment of Information and Communication Engineering, Nagoya University, Nagoya, JapanInstitute of Materials and Systems for Sustainability, IMaSS of Nagoya University, Nagoya, JapanInstitute of Materials and Systems for Sustainability, IMaSS of Nagoya University, Nagoya, JapanInstitute of Materials and Systems for Sustainability, IMaSS of Nagoya University, Nagoya, JapanThe integration of intelligent reflecting surfaces (IRS) into free-space optical (FSO) communication systems is considered as a promising and innovative approach to overcoming existing challenges due to the strict line-of-sight (LoS) requirements faced by conventional FSO setups, thereby ensuring more flexible and controllable links and expanding the communication coverage area. Nonetheless, the configuration of IRS-assisted FSO systems remains relatively novel, requiring investigation into optimizing IRS placement to enhance system performance while mitigating interference and obstacles in dynamic environmental conditions. This work aims to evaluate the improvement of the system performance achieved through optimized IRS positioning while accounting for the main degrading factors inherent in FSO systems and IRS design. We present a comprehensive model for a multilink terrestrial IRS-assisted FSO system, taking into consideration key degrading factors such as pointing errors stemming from both transmitter and IRS jitter, IRS dimensions, and turbulence-induced fading. Furthermore, we derive closed-form expressions for the probability density function of channel coefficients, average bit error rate, and outage probability. Our results indicate that optimal IRS placement is in proximity to the transmitter, taking into account all channel impairments. Furthermore, we showed that optimal IRS placement tends to shift towards the receiver side as the IRS jitter increases. Consequently, the analysis presented offers valuable insights for efficiently designing IRS-assisted FSO systems, particularly regarding IRS placement in the presence of pointing errors.https://ieeexplore.ieee.org/document/10561472/Atmospheric turbulencebeam jitterfree-space opticsintelligent reflecting surfacespointing error |
| spellingShingle | Takumi Ishida Chedlia Ben Naila Hiraku Okada Masaaki Katayama Performance Analysis of IRS-Assisted Multi-Link FSO System Under Pointing Errors IEEE Photonics Journal Atmospheric turbulence beam jitter free-space optics intelligent reflecting surfaces pointing error |
| title | Performance Analysis of IRS-Assisted Multi-Link FSO System Under Pointing Errors |
| title_full | Performance Analysis of IRS-Assisted Multi-Link FSO System Under Pointing Errors |
| title_fullStr | Performance Analysis of IRS-Assisted Multi-Link FSO System Under Pointing Errors |
| title_full_unstemmed | Performance Analysis of IRS-Assisted Multi-Link FSO System Under Pointing Errors |
| title_short | Performance Analysis of IRS-Assisted Multi-Link FSO System Under Pointing Errors |
| title_sort | performance analysis of irs assisted multi link fso system under pointing errors |
| topic | Atmospheric turbulence beam jitter free-space optics intelligent reflecting surfaces pointing error |
| url | https://ieeexplore.ieee.org/document/10561472/ |
| work_keys_str_mv | AT takumiishida performanceanalysisofirsassistedmultilinkfsosystemunderpointingerrors AT chedliabennaila performanceanalysisofirsassistedmultilinkfsosystemunderpointingerrors AT hirakuokada performanceanalysisofirsassistedmultilinkfsosystemunderpointingerrors AT masaakikatayama performanceanalysisofirsassistedmultilinkfsosystemunderpointingerrors |