| Presentation | 2002/10/3 An Optimum Link Design on Ground-to-satellite Optical Communications in the Presence of Random Pointing-Jitter Morio TOYOSHIMA, Nobuhiro TAKAHASHI, Takashi JONO, Toshihiko YAMAWAKI, Keizo NAKAGAWA, Katsuyoshi ARAI, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Optical communications in the presence of atmospheric turbulence are affected by the turbulence-induced optical scintillation. The optical scintillation makes the communication quality, i.e. bit error rate (BER), degrade. Because of the intrinsically narrow optical beam, the random pointing-jitter also generates additional signal fading on the communication signal. A broader optical beam could mitigate the signal fading, but would require greater transmitted power than that for the original beam to achieve the same required BER. In this paper, the average BER is derived from the probability density function (PDF) of the optical signal in the presence of atmospheric turbulence and random pointing-jitter. The joint PDF, of the lognormal PDF caused by atmospheric turbulence and the beta PDF of the random pointing-jitter, is derived by using the characteristic function of each PDF. It is shown that an optimum beam divergence of the transmitting laser beam exists, and the optimum value changes slightly with the atmospheric conditions. The beam divergence angle should be about 7 times larger than the random pointing-jitter of the optical tracking system. An example of the optimum link estimates for the tracking and communication channels are shown for a ground-to-satellite optical communication link. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Optical communication / ground-to-satellite communication / pointing-jitter / atmospheric turbulence / beam divergence angle / link design |
| Paper # | SAT2002-62 |
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| Conference Information | |
| Committee | SAT |
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| Conference Date | 2002/10/3(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Satellite Telecommunications (SAT) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | An Optimum Link Design on Ground-to-satellite Optical Communications in the Presence of Random Pointing-Jitter |
| Sub Title (in English) | |
| Keyword(1) | Optical communication |
| Keyword(2) | ground-to-satellite communication |
| Keyword(3) | pointing-jitter |
| Keyword(4) | atmospheric turbulence |
| Keyword(5) | beam divergence angle |
| Keyword(6) | link design |
| 1st Author's Name | Morio TOYOSHIMA |
| 1st Author's Affiliation | OICETS Project Team, Tsukuba Space Center, National Space Development Agency of Japan() |
| 2nd Author's Name | Nobuhiro TAKAHASHI |
| 2nd Author's Affiliation | OICETS Project Team, Tsukuba Space Center, National Space Development Agency of Japan |
| 3rd Author's Name | Takashi JONO |
| 3rd Author's Affiliation | OICETS Project Team, Tsukuba Space Center, National Space Development Agency of Japan |
| 4th Author's Name | Toshihiko YAMAWAKI |
| 4th Author's Affiliation | OICETS Project Team, Tsukuba Space Center, National Space Development Agency of Japan |
| 5th Author's Name | Keizo NAKAGAWA |
| 5th Author's Affiliation | OICETS Project Team, Tsukuba Space Center, National Space Development Agency of Japan |
| 6th Author's Name | Katsuyoshi ARAI |
| 6th Author's Affiliation | OICETS Project Team, Tsukuba Space Center, National Space Development Agency of Japan |
| Date | 2002/10/3 |
| Paper # | SAT2002-62 |
| Volume (vol) | vol.102 |
| Number (no) | 359 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |