Presentation | 2004/5/21 Chip-level Detection in Optical Frequency Hopping CDMA Shoji ICHIKI, Tomoaki OHTSUKI, |
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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) |
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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 |