Blind Adaptive Low-Complexity Time-Domain Equalizer for 100-Gb/s Direct-Detection Optical OFDM Systems Over Long-Reach SSMF

Benieddi, Asmaa; Elahmar, Sid Ahmed; Dayoub, Iyad; Haxha, Shyqyri

doi:10.1109/jsyst.2020.2996384

Cited by 3 publications

(2 citation statements)

References 23 publications

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“…This leads to an extension of the maximum achievable distance of up to 142 km, compared to 108 km and 82 km for IM/DD AO-OFDM-OCDMA and 2D-OCDMA-WDM, respectively. The future directions for the extension of the access network could be the integration of new emergent technologies, such as multi-meter waves [31] and time domain equalizers, based on the OFDM technique [32], to extend the reachability distance and integration of 5G/6G non orthogonal multi-access (NOMA) in order to connect local and metropolitan networks to the broadband global access network. Finally, although an access network based on the OCDMA-PON configuration preserves data integrity, securing the access network will be a big challenge for researchers in the near future, as regards preserving data confidentiality and privacy against various attacks and threats by using Blockchain technology (BCT) and machine learning (ML)-based solutions [33].…”

Section: Discussionmentioning

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: Discussionmentioning

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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“…To prevent any residual DC component or any DC shift in the signal, X 0 , X N/2 are set to zero and do not carry any information [14], i.e.,…”

Section: Dco-ofdm Systemmentioning

confidence: 99%

Proposed Different Signal Processing Tools for Efficient Optical Wireless Communications

Ibrahim¹,

Algarni²,

Abdalla³

et al. 2022

Computers, Materials &Amp; Continua

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Optical Wireless Communication (OWC) is a new trend in communication systems to achieve large bandwidth, high bit rate, high security, fast deployment, and low cost. The basic idea of the OWC is to transmit data on unguided media with light. This system requires multi-carrier modulation such as Orthogonal Frequency Division Multiplexing (OFDM). This paper studies optical OFDM performance based on Intensity Modulation with Direct Detection (IM/DD) system. This system requires a non-negativity constraint. The paper presents a framework for wireless optical OFDM system that comprises (IM/DD) with different forms, Direct Current biased Optical OFDM (DCO-OFDM), Asymmetrically Clipped Optical OFDM (ACO-OFDM), Asymmetrically DC-biased Optical OFDM (ADO-OFDM), and Flip-OFDM. It also considers channel coding as a tool for error control, channel equalization for reducing deterioration due to channel effects, and investigation of the turbulence effects. The evaluation results of the proposed framework reveal enhancement of performance. The performance of the IM/DD-OFDM system is investigated over different channel models such as AWGN, log-normal turbulence channel model, and ceiling bounce channel model. The simulation results show that the BER performance of the IM/DD-OFDM communication system is enhanced while the fading strength is decreased. The results reveal also that Hamming codes, BCH codes, and convolutional codes achieve better BER performance. Also, two algorithms of channel estimation and equalization are considered and compared. These algorithms include the Least Squares (LS) and the Minimum Mean Square Error (MMSE). The simulation results show that the MMSE algorithm gives better BER performance than the LS algorithm.

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A comparative Study of Channel Shortening Equalizer Designs in THMA-UWB Systems

Noureddine

Ahmed

2022

2022 2nd International Conference on Advanced Electrical Engineering (ICAEE)

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Blind Adaptive Low-Complexity Time-Domain Equalizer for 100-Gb/s Direct-Detection Optical OFDM Systems Over Long-Reach SSMF

Cited by 3 publications

References 23 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

Proposed Different Signal Processing Tools for Efficient Optical Wireless Communications

A comparative Study of Channel Shortening Equalizer Designs in THMA-UWB Systems

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