| Presentation | 1999/3/11 On Improvements of Synchronous Acquisition Methods with Code-Orthogonalizing Filters in DS/CDMA Chiyo Nakano, Hitoshi Suzuki, Masanori Hamamura, Shinichi Tachikawa, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this paper, we discuss synchronous acquisition methods using code-orthogonalizing filters (COFs) in asynchronous direct sequence (DS)/CDMA and propose novel methods to improve the acquisition performance. In the systems, first, the tap coefficients of COF are controlled to orthogonalize to all users' sequences including the desired users spreading sequence. Next, several probable synchronous phases are selected by using the difference of correlation function value between the tap coefficients and the desired users sequence for each phase. Finally, the most probable synchronous phase is decided from these phases by a conventional precise acquisition system in this paper, considering the above correlation function consists of two partial correlation functions, we propose two methods to select probable phases, and describe them compared with a conventional system. By computer simulations, we show the improvement effects of average acquisition time in proposed systems. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | DS/CDMA / code-orthogonalizing filter / synchronous aquisition method / correlation function |
| Paper # | IT98-84 |
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| Conference Information | |
| Committee | ISEC |
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| Conference Date | 1999/3/11(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Information Security (ISEC) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | On Improvements of Synchronous Acquisition Methods with Code-Orthogonalizing Filters in DS/CDMA |
| Sub Title (in English) | |
| Keyword(1) | DS/CDMA |
| Keyword(2) | code-orthogonalizing filter |
| Keyword(3) | synchronous aquisition method |
| Keyword(4) | correlation function |
| 1st Author's Name | Chiyo Nakano |
| 1st Author's Affiliation | Tachikawa lab., Faculty of Engineering, Nagaoka University of Technology() |
| 2nd Author's Name | Hitoshi Suzuki |
| 2nd Author's Affiliation | Tachikawa lab., Faculty of Engineering, Nagaoka University of Technology |
| 3rd Author's Name | Masanori Hamamura |
| 3rd Author's Affiliation | Tachikawa lab., Faculty of Engineering, Nagaoka University of Technology:Research Fellow of the Japan Society for the Promotion of Science |
| 4th Author's Name | Shinichi Tachikawa |
| 4th Author's Affiliation | Tachikawa lab., Faculty of Engineering, Nagaoka University of Technology |
| Date | 1999/3/11 |
| Paper # | IT98-84 |
| Volume (vol) | vol.98 |
| Number (no) | 656 |
| Page | pp.pp.- |
| #Pages | 7 |
| Date of Issue | |