Beyond 4 × 100 Gbps Optical Backhaul Network With DSP Assistance Based Nonlinear Impairments Mitigation

Abstract

An important goal of a long haul optical fiber system is to transmit the highest data throughput over the longest distance with as much as possible signal regeneration. To implement such kind of setup practically over a wavelength division multiplexing multiplex (WDM Mux) system, then fiber nonlinearities are one of the major limitations, faced to achievable transmission rates in optical communication system (Agrawal, 2002;Ali, Khan, & Qureshi, 2019). Additionally, these limitations have a direct relation with high data rates optical communication system (Sadot et al., 2016;Senior, 2008). Moreover higher input optical power level is also needed to be applied to the transmission link which may also contribute in transmission performance degradation (Z. Chen et al., 2018;Zhang et al., 2019). Cross phase modulation (XPM) (Surbhi & Brintha, 2015), four wave mixing (FWM) (Rademacher et al., 2018), and self phase modulation (SPM) (Ali, Khan, Ali, & Ahmad, 2018) are the key sources of nonlinear impairments in optical fiber communication system. Recent research works in the optical domain are the digital Nonlinearity Compensation (NLC) is fully loaded coherent WDM multiplexed transmission system (Ali, Khan, Qureshi, et al., 2018), the shaping algorithm for mitigating the effect of nonlinear phase noise in fiber optic transmission (Marvin & Pratheesh, 2014), the single step nonlinear impairment based on the Gaussian mixture model (Ali, Ahmad, et al., 2019), and WDM design to reach a data rate of 40 Gbps over 240 km optical fiber of a single channel (Anjum et al., 2018). However, these mentioned models have complex build up, less security and cost restrictions. To overcome these limitations we propose a cost effective set up and simple network structure for long haul high data rate system. The proposed architecture is tested for higher data rates, that is, beyond 100 Gbps. Satisfactory results are achieved for high data rates, for example, 2.3BER at 90 μm 2 and 25 GHz frequency spacing among each channel are recorded, which is acceptable range for the advance communication system. Filtration requirements are fulfilled by erbium doped fiber amplifier (EDFA) (Huszaník et al., 2019) and fiber brag grating (FBG) (Jiangbing et al., 2015). Major ContributionThe main purpose of this paper is to investigate nonlinearities inside optical fiber, propagating high data rate data through long distances. The major contribution of this paper is listed as follows.

Implementation of Digital Signal Processor for Pulse Doppler Radar

“…The simulation results show that the proposed UF-OFDM and F-OFDM outperform existing approaches such as OFDM and UFMC. The paper [17] proposes a model that aims to mitigate the impact of nonlinearities in longdistance, high-capacity communication systems. The model is explored using analytical and simulation-based approaches, and its performance is compared with and without compensation for nonlinearities.…”