| Presentation | 1998/3/18 Optical Spread Time CDMA System with PPM Signaling Katsuhiro KAMAKURA, Tomoaki OHTSUKI, Iwao SASASE, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Optical spread-time code-division multiple-access(ST-CDMA)has been widely studied as a type of optical CDMA. In this system, encoding is done in the frequency domain spread by optically Fourier transform and the encoded pulse is spread out in the time domain like as a low intensity pseudonoise burst. However, since the process gain is limited by the resolution of a phase mask, optical ST-CDMA has a disadvantage that it seriously suffers from the multi-access interference(MAI)as the bit rate and/or the number of simultaneous users increase. In this paper we propose an optical ST-CDMA with pulse position modulation(PPM)signaling for high-speed communication system. The proposed system is expected to get better performance than optical ST-CDMA with OOK signaling by the effect of the pulse position multiplicity of PPM signaling. We obtain a union upper bound on the bit error rate(BER)considering the MAI, shot noise and thermal noise at the receiver and investigate the system performance with respect to several relevant devices and system parameters. We show that the requirement for the resolution of a phase mask can be reduced. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | optical ST-CDMA / PPM / multi-access interference(MAI) / phase mask / process gain |
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| Conference Information | |
| Committee | ISEC |
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| Conference Date | 1998/3/18(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| 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) | Optical Spread Time CDMA System with PPM Signaling |
| Sub Title (in English) | |
| Keyword(1) | optical ST-CDMA |
| Keyword(2) | PPM |
| Keyword(3) | multi-access interference(MAI) |
| Keyword(4) | phase mask |
| Keyword(5) | process gain |
| 1st Author's Name | Katsuhiro KAMAKURA |
| 1st Author's Affiliation | Department of Electrical Engineering, Keio University() |
| 2nd Author's Name | Tomoaki OHTSUKI |
| 2nd Author's Affiliation | Department of Electrical Engineering Science University of Tokyo |
| 3rd Author's Name | Iwao SASASE |
| 3rd Author's Affiliation | Department of Electrical Engineering, Keio University |
| Date | 1998/3/18 |
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| Volume (vol) | vol.97 |
| Number (no) | 611 |
| Page | pp.pp.- |
| #Pages | 6 |
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