| Presentation | 2004/6/18 A Proposal of Code Allocation for Orthogonal CSK Slotted ALOHA Systems Daisuke UMEHARA, Kiminobu SUGANO, Yoshiteru MORIHIRO, Makoto KAWAI, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We pay attention to demand assigne S-CDMA (synchronous code division multiple access) as one of multiple access techniques for packet data satellite communication. We utilize orthogonal CSK (code shift keying) sequences, which are obtained by orthogonalization of CSK sequences, as spreading code sequences for S-CDMA. The orthogonal CSK sequences include many QS (quasi synchronous) sequences which have zero cross correlation in a given range within access timing point at center. We propose a method to preferentially allocate one of sequences which preserve zero cross correlated with all already assigned sequences at widest range within access timing point at center. Further, we show that the S-CDMA with the proposed code allocation has high tolerance for access timing errors due to channel fluctuation. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | S-CDMA / QS sequence / orthogonal CSK Slotted ALOHA / access timing error / throughput |
| Paper # | WBS2004-3,SAT2004-27 |
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| Conference Information | |
| Committee | SAT |
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| Conference Date | 2004/6/18(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) | A Proposal of Code Allocation for Orthogonal CSK Slotted ALOHA Systems |
| Sub Title (in English) | |
| Keyword(1) | S-CDMA |
| Keyword(2) | QS sequence |
| Keyword(3) | orthogonal CSK Slotted ALOHA |
| Keyword(4) | access timing error |
| Keyword(5) | throughput |
| 1st Author's Name | Daisuke UMEHARA |
| 1st Author's Affiliation | Graduate School of Informatics, Kyoto University() |
| 2nd Author's Name | Kiminobu SUGANO |
| 2nd Author's Affiliation | Graduate School of Informatics, Kyoto University |
| 3rd Author's Name | Yoshiteru MORIHIRO |
| 3rd Author's Affiliation | Graduate School of Informatics, Kyoto University |
| 4th Author's Name | Makoto KAWAI |
| 4th Author's Affiliation | College of Science and Engineering, Ritsumeikan University |
| Date | 2004/6/18 |
| Paper # | WBS2004-3,SAT2004-27 |
| Volume (vol) | vol.104 |
| Number (no) | 146 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |