| Presentation | 2005-03-18 Acquisition of Markovian SS Codes in Chip-Asynchronous DS/CDMA Systems Yutaka JITSUMATSU, Tohru KOHDA, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | G. Mazzini et al. [1] showed that Spread Spectrum (SS) codes with Markovity give lower bit error rate (BER) than the conventional linear feedback shift register (LFSR) sequences such as Kasami and Gold codes, as well as independent and identically distributed (i.i.d.) codes in asynchronous DS/CDMA (direct sequence/code division multiple access) systems. However, SS codes are required to have not only low BER but also quick code acquisition performance. We have proposed a code acquisition method based on a posteriori probability for chip-synchronous DS/CDMA systems [9]. This report extends this acquisition method for asynchronous (or, chip-asynchronous) systems and shows Markovian SS codes have a good property in code acquisition as well, i.e., Markian SS codes makes calculation of a posteriori probability easier. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | asynchronous CDMA system / Code Acquisition / a posteriori probability / SS codes / Markov sequences |
| Paper # | IT2004-77,ISEC2004-133,WBS2004-192 |
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| Conference Information | |
| Committee | ISEC |
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| Conference Date | 2005/3/11(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 | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Acquisition of Markovian SS Codes in Chip-Asynchronous DS/CDMA Systems |
| Sub Title (in English) | |
| Keyword(1) | asynchronous CDMA system |
| Keyword(2) | Code Acquisition |
| Keyword(3) | a posteriori probability |
| Keyword(4) | SS codes |
| Keyword(5) | Markov sequences |
| 1st Author's Name | Yutaka JITSUMATSU |
| 1st Author's Affiliation | Department of Computer Science and Communication Engineering, Kyushu University() |
| 2nd Author's Name | Tohru KOHDA |
| 2nd Author's Affiliation | Department of Computer Science and Communication Engineering, Kyushu University |
| Date | 2005-03-18 |
| Paper # | IT2004-77,ISEC2004-133,WBS2004-192 |
| Volume (vol) | vol.104 |
| Number (no) | 732 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |