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Title: Nyquist WDM superchannel using offset-16QAM and receiver-side digital spectral shaping
Authors: Xiang, Meng
Fu, Songnian
Tang, Ming
Tang, Haoyuan
Shum, Perry
Liu, Deming
Keywords: DRNTU::Engineering::Electrical and electronic engineering
Issue Date: 2014
Source: Xiang, M., Fu, S., Tang, M., Tang, H., Shum, P., & Liu, D. (2014). Nyquist WDM superchannel using offset-16QAM and receiver-side digital spectral shaping. Optics Express, 22(14), 17448-.
Series/Report no.: Optics express
Abstract: The performance of Nyquist WDM superchannel using advanced modulation formats with coherent detection is degraded due to the existence of both inter-symbol interference (ISI) and inter-channel interference (ICI). Here, we propose and numerically investigate a Nyquist WDM superchannel using offset-16QAM and receiver-side digital spectral shaping (RS-DSS), achieving a spectral efficiency up to 7.44 bit/s/Hz with 7% hard-decision forward error correction (HD-FEC) overhead. Compared with Nyquist WDM superchannel using 16QAM and RS-DSS, the proposed system has 1.4 dB improvement of required OSNR at BER = 10−3 in the case of back-to-back (B2B) transmission. Furthermore, the range of launched optical power allowed beyond HD-FEC threshold is drastically increased from −6 dBm to 1.2 dBm, after 960 km SSMF transmission with EDFA-only. In particular, no more than 1.8 dB required OSNR penalty at BER = 10−3 is achieved for the proposed system even with the phase difference between channels varying from 0 to 360 degree.
ISSN: 1094-4087
DOI: 10.1364/OE.22.017448
Rights: © 2014 Optical Society of America. This paper was published in Optics Express and is made available as an electronic reprint (preprint) with permission of Optical Society of America. The paper can be found at the following official DOI:  One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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