A novel support vector machine robust model based electrical equaliser for coherent optical orthogonal frequency division multiplexing systems

Mhatli, Sofien; Mrabet, Hichem; Dayoub, Iyad

doi:10.1049/iet-com.2016.1115

Cited by 11 publications

(4 citation statements)

References 21 publications

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“…Orthogonal frequency-division multiplexing (OFDM) is an emerging technology in optical fiber communications due to its inherent advantages, which include simplified digital signal processing for channel estimation and the compensation of linear fiber-induced impairments, such as chromatic dispersion and polarization-mode dispersion [1]. OFDM is essentially a method of encoding digital data on multiple carrier frequencies, harnessing the (inverse) fast Fourier transform (IFFT) [2], and is widely used in wireless local area networks (802.11 a/g) and wireless metropolitan area networks (802.16 d).…”

Section: Introductionmentioning

confidence: 99%

A Performance Analysis of a Hybrid OCDMA-PON Configuration Based on IM/DD Fast-OFDM Technique for Access Network

Mrabet

2020

Applied Sciences

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The purpose of this article is to propose a new configuration based on OCDMA and Fast-OFDM techniques for access network applications. A hybrid intensity modulation with direct detection, fast orthogonal frequency-division multiplexing–code division multiplexing access (IM/DD Fast-OFDM-CDMA) system is analytically and numerically evaluated for an amplifier-free access network. Therefore, system performance is analytically investigated in terms of bit error rate/Q-factor as a function of simultaneous users, fiber length and launched optical power. Firstly, the proposed analytical model includes the overlapping effect among OFDM subcarriers, the peak-to-average power ratio (PAPR), and multiple access interference (MAI). Secondly, a simulation setup is performed, allowing four simultaneous users operating at 40 Gb/s in a passive optical network (PON) context. Furthermore, a power budget analysis is made between IM/DD Fast-OFDM-CDMA, all-optical IM/DD OFDM-CDMA (IM/DD AO-OFDM-CDMA) and OCDMA wavelength division multiplexing (OCDMA-WDM) configurations. It is shown that at 40 Gb/s and by using 2D-hybrid coding (2D-HC), the maximum achievable transmission-reach of IM/DD Fast-OFDM-CDMA is 142 km, which is 34 km and 60 km higher than those provided by the IM/DD AO-OFDM-OCDMA and OCDMA-WDM PON configurations, respectively.

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Section: Introductionmentioning

confidence: 99%

A Performance Analysis of a Hybrid OCDMA-PON Configuration Based on IM/DD Fast-OFDM Technique for Access Network

Mrabet

2020

Applied Sciences

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“…Support vector regression (SVR), based on structural risk minimization, is a valid machine learning tool in dealing with small data blocks, which can be optimized to global minimum. In recent years, it has been used for channel equalization in single input single output (SISO) [29]- [32], orthogonal frequency division multiplexing (OFDM) [33], and MIMO systems [34]. Specifically, in [34], SVR framework combined with CMA and radius directed algorithm (RDA) is researched.…”

Section: Introductionmentioning

confidence: 99%

SVR Based Blind Signal Recovery for Convolutive MIMO Systems With High-Order QAM Signals

2019

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This paper addresses the blind signal recovery for convolutive multiple-input multiple-output systems with high-order quadrature amplitude modulation (QAM) signals. First, a family of batch blind recovery algorithms is proposed. Concretely, they introduce the error function of multimodulus algorithm and the cross-correlation among different equalizer output vectors into the penalty term of the support vector regression (SVR) framework to recover all sources simultaneously. Then, the corresponding dual-mode blind recovery schemes are constructed to further decrease the interference. The new blind formulation through iterative re-weighted least square achieves low complexity optimization. The SVR framework, in essence, determines that the proposals perform better than the conventional methods in terms of data block size, total interference, and symbol error rate. Moreover, the excellent initialization provided by the first mode and the accurate error expression in the second mode ensure that the SVR-based dual-mode schemes work well with the high-order QAM signals. Finally, the efficiency of the proposals over the classical approaches is evaluated by simulations. INDEX TERMS Convolutive MIMO systems, high-order QAM signals, blind equalization, blind source separation, support vector regression, multimodulus algorithm.

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“…The decision-directed phase-locked loop (DDPLL) method was employed for the carrier phase recovery. Finally, the machine learning algorithm was processed before the hard decision and the bit error rate (BER)/Q-factor (=20log 10 √ 2er f c −1 (2BER) ) calculation, similarly to other reported work with machine learning signal processing [20][21][22][23][24][25].…”

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confidence: 99%

A Blind Nonlinearity Compensator Using DBSCAN Clustering for Coherent Optical Transmission Systems

et al. 2019

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Coherent fiber-optic communication systems are limited by the Kerr-induced nonlinearity. Benchmark optical and digital nonlinearity compensation techniques are typically complex and tackle deterministic-induced nonlinearities. However, these techniques ignore the impact of stochastic nonlinear distortions in the network, such as the interaction of fiber nonlinearity with amplified spontaneous emission from optical amplification. Unsupervised machine learning clustering (e.g., K-means) has recently been proposed as a practical approach to the blind compensation of stochastic and deterministic nonlinear distortions. In this work, the Density-Based Spatial Clustering of Applications with Noise (DBSCAN) algorithm is employed, for the first time, for blind nonlinearity compensation. DBSCAN is tested experimentally in a 40 Gb/s 16 quadrature amplitude-modulated system at 50 km of standard single-mode fiber transmission. It is shown that at high launched optical powers, DBSCAN can offer up to 0.83 and 8.84 dB enhancement in Q-factor when compared to conventional K-means clustering and linear equalisation, respectively.

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A novel support vector machine robust model based electrical equaliser for coherent optical orthogonal frequency division multiplexing systems

Cited by 11 publications

References 21 publications

A Performance Analysis of a Hybrid OCDMA-PON Configuration Based on IM/DD Fast-OFDM Technique for Access Network

A Performance Analysis of a Hybrid OCDMA-PON Configuration Based on IM/DD Fast-OFDM Technique for Access Network

SVR Based Blind Signal Recovery for Convolutive MIMO Systems With High-Order QAM Signals

A Blind Nonlinearity Compensator Using DBSCAN Clustering for Coherent Optical Transmission Systems

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