Evolutionary Design of Pulse-Shaping FIR Filter to Mitigate Fiber Nonlinearity

Koike‐Akino, Toshiaki; Millar, David S.; Parsons, Kieran; Kojima, K.

doi:10.1364/sppcom.2018.spm4g.4

Cited by 5 publications

(2 citation statements)

References 9 publications

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“…The symbol rate, R s , corresponds to a standard symbol rate of 1.44 Gbit/s [12]. Additionally, in practice, p(t) is the impulse response of a digital FIR filter, which is implemented using a finite number of symmetric taps to avoid long processing delays [22]. Therefore, the impact of ISI introduced by a finite number of interfering symbols before and after the desired symbol is considered in (7).…”

Section: Inter-symbol Interference Analysismentioning

confidence: 99%

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Timing-Jitter Tolerant Nyquist Pulse for Terahertz Communications

Shehata

Wang

Webber

et al. 2022

J. Lightwave Technol.

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Seamless integration of terahertz wireless communications with existing optical access networks can potentially offer tens of gigahertz of channel bandwidth. However, the timingjitter 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 photonicterahertz 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.Index Terms-Optical pulse shaping, radio-over-fiber, terahertz communications, terahertz over fiber, terahertz photonics, timing-jitter, waveform design. I. INTRODUCTIOND AY-by-day increasing demands for reliable high-speed wireless services are expected to rapidly approach and exceed the capacity of fifth-generation (5G) communications networks. These demands are unlikely to be fulfilled without ongoing vigorous research on next-generation wireless networks, namely, 6G. A key enabler for 6G communications is terahertz technology that offers ample spectral resources for point-to-point wireless systems [1]. Numerous advantages

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Section: Inter-symbol Interference Analysismentioning

confidence: 99%

“…Therefore, the impact of ISI introduced by a finite number of interfering symbols before and after the desired symbol is considered in (7). The number of interfering symbols listed in Table I is in line with the typical filter half-length required for a (2L + 1)-tap symmetric FIR filter [22], where L ≤ 31.…”

Section: Inter-symbol Interference Analysismentioning

confidence: 99%

Timing-Jitter Tolerant Nyquist Pulse for Terahertz Communications

Shehata

Wang

Webber

et al. 2022

J. Lightwave Technol.

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Terahertz Pulse Shaping using Microwave-Photonic Delay Line Filters

Shehata

Wang

Withayachumnankul

2021

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz)

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Nonlinearity mitigation of self-phase modulation effect in coherent optical system

Hadjadji

Hamdi

2022

Journal of Optical Communications

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In this paper, the proficiency of nonlinearity compensation studied on the polarization division multiplexing 0.3 return-to-zero quadrature phase-shift keying (PDM-0.3RZ-QAM) coherent optical system. The considerable nonlinear effect is the self-phase modulation (SPM) in the presence of chromatic dispersion. The nonlinearity mitigation technique based on the digital backpropagation (DBP) algorithm is implemented on the receiver side. The performance of the system was investigated in different terms as the optical signal-noise ratio, bit error rate, and the maximum transmission distance. The results demonstrated that the penalties were decreased by 3 dB. The maximum achievable distance was extended to 2000 km.

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Evolutionary Design of Pulse-Shaping FIR Filter to Mitigate Fiber Nonlinearity

Abstract: We use evolutionary strategy to design an irregular pulse-shaping filter to mitigate nonlinear distortion in fiber-optic transmission. Our optimized filter achieves greater than 0.2 dB gain over RRC Nyquist shaping with zero additional cost in computational complexity.

Cited by 5 publications

References 9 publications

Timing-Jitter Tolerant Nyquist Pulse for Terahertz Communications

Timing-Jitter Tolerant Nyquist Pulse for Terahertz Communications

Terahertz Pulse Shaping using Microwave-Photonic Delay Line Filters

Nonlinearity mitigation of self-phase modulation effect in coherent optical system

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