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Type: Journal article
Title: Timing-Jitter tolerant Nyquist pulse for terahertz communications
Author: Shehata, M.S.D.
Wang, K.
Webber, J.
Fujita, M.
Nagatsuma, T.
Withayachumnankul, W.
Citation: Journal of Lightwave Technology, 2022; 40(2):557-564
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Issue Date: 2022
ISSN: 0733-8724
Statement of
Mohamed Shehata, Ke Wang, Julian Webber, Masayuki Fujita, Tadao Nagatsuma, Withawat Withayachumnankul
Abstract: Seamless integration of terahertz wireless communications with existing optical access networks can potentially offer tens of gigahertz of channel bandwidth. However, the timing-jitter exhibited by the electronics-based transceivers is a key transmission impairments that tends to ceil the performance of these hybrid access networks, especially at high transmission baud rates. In this work, we propose a sinc-Lorentzian Nyquist pulse shape that outperforms the conventional raised-cosine and the better-than raised-cosine pulse shapes under the influence of timing-jitter up to 35% of the symbol duration. Experimental demonstrations are carried out using a 311 GHz photonic-terahertz system operating at a standard bit rate of 1.44 Gbit/s to investigate the robustness of the three pulse shapes against timing-jitter. It is confirmed that the proposed pulse shape is highly-tolerant to timing-jitter as well as the nonlinearity exhibited by terahertz systems, and hence, can improve the bit error rate performance by an order of magnitude when the average timing-jitter is as large as 0.24 ns. The proposed pulse shape is a critical step for designing ultra-high-speed terahertz communications links with improved robustness to timing-jitter.
Keywords: Optical pulse shaping; radio-over-fiber; terahertz communications; terahertz over fiber; terahertz photonics; timingjitter; waveform design
Rights: © 2021 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission.
DOI: 10.1109/JLT.2021.3121814
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Appears in Collections:Physics publications

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