| Presentation | 2013-07-26 Signal Processing for Nyquist-Wavelength Multiplexed Transmission Systems(Invited Talk) Koji IGARASHI, Takehiro TSURITANI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Optical signals with rectangular-shaped spectra after the Nyquist pulse shaping can be aligned with as narrow spacing as a symbol rate in the frequency domain, thus achieving the Nyquist-limited theoretical gross spectral efficiency without any inter-symbol interference (ISI) and any crosstalk from adjacent wavelength division multiplexed (WDM) channels. This is called Nyquist WDM technique. In this paper, we review the basic knowledge for understanding the Nyquist WDM technique, and then, we show the details of the digital signal processing required for generating the Nyquist WDM signals. First, we explain the need of pulse shaping for controlling ISI originated from limitation of signal band, and then, we describe the Nyquist criterion giving the condition for suppressing ISI. Discussing the Nyquist criterion in the frequency domain, we have an intuitive understanding of the rectangular Nyquist pulse shaping achieving both signal band limitation and ISI suppression. Next, we show the details of the signal processing in the transmitter required for rectangular Nyquist pulse shaping, and then, we discuss the limitation given by the devices in the transmitter and receiver. Finally, we introduce the bit-error rate performance of the Nyquist WDM polarization-multiplexed QPSK signals. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Nyquist pulse shaping / Optical Coherent Communication / Filtering |
| Paper # | OCS2013-35 |
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| Committee | OCS |
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| Conference Date | 2013/7/18(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) | Signal Processing for Nyquist-Wavelength Multiplexed Transmission Systems(Invited Talk) |
| Sub Title (in English) | |
| Keyword(1) | Nyquist pulse shaping |
| Keyword(2) | Optical Coherent Communication |
| Keyword(3) | Filtering |
| 1st Author's Name | Koji IGARASHI |
| 1st Author's Affiliation | KDDI R&D Laboratories Inc.() |
| 2nd Author's Name | Takehiro TSURITANI |
| 2nd Author's Affiliation | KDDI R&D Laboratories Inc. |
| Date | 2013-07-26 |
| Paper # | OCS2013-35 |
| Volume (vol) | vol.113 |
| Number (no) | 156 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |