| Presentation | 2004/5/21 Chip-level Detection in Optical Frequency Hopping CDMA Shoji ICHIKI, Tomoaki OHTSUKI, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Recently, optical code-division multiple-access (OCDMA) systems have attracted much attention in fiber-optic local area networks (LAN's). One of the serious problems for OCDMA is the multiple user interference (MUI). There are two types of OCDMA, the time spreading (1-D) OCDMA, which spreads the optical pulse in time domain, and the frequency hopping (2-D) OCDMA, which spreads the optical pulse in time and frequency domain. Optical frequency hopping CDMA (FH-OCDMA), that is an 2-D OCDMA, can achieve a high data rate and can accommodate more users than 1-D OCDMA. In 1-D OCDMA the chip-level receiver was proposed to reduce the MUI and was shown to achieve the better error rate performance than the correlation receiver. In this report, we propose a chip-level receiver for FH-OCDMA. The proposed chip-level receiver for FH-OCDMA consists of an arrayed waveguide grating (AWG) and photo-detectors (PD's) for each mark chip. We analyze the error rate performance of the FH-OCDMA system with the proposed chip-level receiver with considering the effects of shot noise, thermal noise, and multi-user interference (MUI) using a Gaussian approximation. We compare the performance of the proposed chip-level receiver to that of the conventional correlation receiver. We show that the proposed chip-level receiver has a better bit error probability and can accommodate more users than the conventional correlation receiver. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | optical CDMA / frequency hopping / 2-D code / chip-level receiver / multiple user interference / fiber bragg grating |
| Paper # | CS2004-22,OCS2004-32,PN2004-27 |
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| Conference Information | |
| Committee | OCS |
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| Conference Date | 2004/5/21(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Optical Communication Systems (OCS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Chip-level Detection in Optical Frequency Hopping CDMA |
| Sub Title (in English) | |
| Keyword(1) | optical CDMA |
| Keyword(2) | frequency hopping |
| Keyword(3) | 2-D code |
| Keyword(4) | chip-level receiver |
| Keyword(5) | multiple user interference |
| Keyword(6) | fiber bragg grating |
| 1st Author's Name | Shoji ICHIKI |
| 1st Author's Affiliation | Graduate School of Science and Technology, Tokyo University of Science() |
| 2nd Author's Name | Tomoaki OHTSUKI |
| 2nd Author's Affiliation | Faculty of Science and Technology, Tokyo University of Science |
| Date | 2004/5/21 |
| Paper # | CS2004-22,OCS2004-32,PN2004-27 |
| Volume (vol) | vol.104 |
| Number (no) | 83 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |