| Presentation | 2020-09-04 A Study on Chip-Pair Codes for Synchronous Optical CDMA Systems Tomoko K. Matsushima, Shoichiro Yamasaki, Kyohei Ono, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper proposes a class of chip-pair codes for synchronous optical code-division multiple access (CDMA) and shows a general construction method of these codes. The chip-pair codes can be obtained from generalized modified prime sequence codes (GMPSCs) based on extension fields GF($q$) where $q = p^m$, $p$ is a prime number and $m$ is a positive integer. It has been reported that optical CDMA systems using GMPSCs remove not only multi-user interference (MUI) but also optical interference (e.g. background light) whose intensity is constant during a slot of length $q^2$. Recently, the authors have reported that optical CDMA systems using GMPSCs also remove optical interference whose intensity varies by block with a length of $q$ chips. The present paper shows that optical CDMA system using the proposed chip-pair code and equal-weight orthogonal (EWO) scheme removes interference light whose intensity varies by shorter block with a length of $p$ chips without requiring an additional equipment. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | optical CDMA / generalized modified prime sequence code / chip-pair code / optical interference / background light |
| Paper # | IT2020-19 |
| Date of Issue | 2020-08-28 (IT) |
| Conference Information | |
| Committee | IT |
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| Conference Date | 2020/9/4(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Error correcting codes, General |
| Chair | Tadashi Wadayama(Nagoya Inst. of Tech.) |
| Vice Chair | Tetsuya Kojima(Tokyo Kosen) |
| Secretary | Tetsuya Kojima(Yamaguchi Univ.) |
| Assistant | Takahiro Ohta(Senshu Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Information Theory |
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| Language | ENG-JTITLE |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Study on Chip-Pair Codes for Synchronous Optical CDMA Systems |
| Sub Title (in English) | |
| Keyword(1) | optical CDMA |
| Keyword(2) | generalized modified prime sequence code |
| Keyword(3) | chip-pair code |
| Keyword(4) | optical interference |
| Keyword(5) | background light |
| 1st Author's Name | Tomoko K. Matsushima |
| 1st Author's Affiliation | Polytechnic University(Polytechnic Univ.) |
| 2nd Author's Name | Shoichiro Yamasaki |
| 2nd Author's Affiliation | Polytechnic University(Polytechnic Univ.) |
| 3rd Author's Name | Kyohei Ono |
| 3rd Author's Affiliation | Polytechnic University(Polytechnic Univ.) |
| Date | 2020-09-04 |
| Paper # | IT2020-19 |
| Volume (vol) | vol.120 |
| Number (no) | IT-157 |
| Page | pp.pp.7-12(IT), |
| #Pages | 6 |
| Date of Issue | 2020-08-28 (IT) |