| Presentation | 2015-03-04 Separation and Detection of Collided Packets for Space based Automatic Identification System Experiments Kensaku HOSHIHARA, Sei INOUE, Kazuhiko FUKAWA, Hiroshi SUZUKI, Daichi HIRAHARA, Naoki MIYASHITA, Keizou NAKAGAWA, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The automatic identification system (AIS) provides wireless communication services between ships and ships or between ships and base stations along coasts. Experiments that satellites receive AIS signals have been conducted and called space based AIS experiment (SPAISE). Since several AIS packets collide at a satellite, however, ordinary signal detection schemes cannot separate and detect collided packets. To cope with such a problem, this report proposes applications of multiuser detection into SPAISE. First, Doppler frequencies, delay timing, and channel impulse responses of the collided packets are estimated by correlation between received signals and known training signals. Using the estimates, successive interference cancellation and Viterbi algorithm perform multiuser detection in order to separate and detect the collided packets. Computer simulations under two-user conditions demonstrate that SIC is very effective when difference of received power among users is greater than or equal to about 7 dB, and that multiuser detection by Viterbi algorithm cannot provide good BER performance because the Doppler frequency is not accurately estimated. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Space based AIS experiment / packet separation / correlation / multiuser detection / SIC / Viterbi algorithm |
| Paper # | RCS2014-305 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2015/2/25(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Radio Communication Systems (RCS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Separation and Detection of Collided Packets for Space based Automatic Identification System Experiments |
| Sub Title (in English) | |
| Keyword(1) | Space based AIS experiment |
| Keyword(2) | packet separation |
| Keyword(3) | correlation |
| Keyword(4) | multiuser detection |
| Keyword(5) | SIC |
| Keyword(6) | Viterbi algorithm |
| 1st Author's Name | Kensaku HOSHIHARA |
| 1st Author's Affiliation | Tokyo Institute of Technology() |
| 2nd Author's Name | Sei INOUE |
| 2nd Author's Affiliation | Tokyo Institute of Technology |
| 3rd Author's Name | Kazuhiko FUKAWA |
| 3rd Author's Affiliation | Tokyo Institute of Technology |
| 4th Author's Name | Hiroshi SUZUKI |
| 4th Author's Affiliation | Tokyo Institute of Technology |
| 5th Author's Name | Daichi HIRAHARA |
| 5th Author's Affiliation | Tokyo Institute of Technology |
| 6th Author's Name | Naoki MIYASHITA |
| 6th Author's Affiliation | Tokyo Institute of Technology |
| 7th Author's Name | Keizou NAKAGAWA |
| 7th Author's Affiliation | Tokyo Institute of Technology |
| Date | 2015-03-04 |
| Paper # | RCS2014-305 |
| Volume (vol) | vol.114 |
| Number (no) | 490 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |