Experimental demonstration of PAM-DWMT for passive optical network

Lin, Bangjiang; Zhang, Kaiwei; Tang, Xuan; Ghassemlooy, Zabih; Lin, Chun-Ting; Zhou, Zhenlei

doi:10.1016/j.optcom.2018.02.070

Cited by 3 publications

(4 citation statements)

References 16 publications

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“…Wavelet‐based OFDM presents a promising alternative to OFDMA since it provides good orthogonality and improves the BER . Some recent research works have dealt with its application in optical transmission networks; however, to the best of our knowledge, these works dealt with the physical implementability for a traditional optical transmission case without considering VPN implementation through authentication and other security mechanisms. Indeed, this can be an interesting research area for future work.…”

Section: Ocdma Vpn Versus Ofdma Vpnmentioning

confidence: 99%

All‐optical VPN platform for multisite VLC‐based networks

Salhi

Sliti

Boudriga

2018

Trans Emerging Tel Tech

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Optical networks and, in particular, visible light communication represent a very promising communication medium for future‐generation company networks. The establishment of virtual private networks (VPNs) in these specific distributed networks is a fundamental issue. In this paper, we present an all‐optical VPN platform based on visible light communication small cells on the access side and an optical fiber link on the backbone side. We exploited the security enhancement using the superposition of optical signals encoded using optical code‐division multiplexing codewords specific to each user. Two VPN modes are proposed: transport and tunnel. Even though the transport mode provides a much lower blocking rate as well as transmission performance (lower packet delay), the tunnel mode is advantageous from a security perspective due to the embedded optical code‐division multiple access encoding that it implements. Simulations are carried out for both modes to study the performance and security level provided by the proposed VPN architecture relatively to specific parameters (codeword size and number of simultaneous users).

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Section: Ocdma Vpn Versus Ofdma Vpnmentioning

confidence: 99%

All‐optical VPN platform for multisite VLC‐based networks

Salhi

Sliti

Boudriga

2018

Trans Emerging Tel Tech

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“…As a result of this, it means that lower peak‐to‐average‐power ratio can be achieved in DWT‐based multicarrier communication systems. In addition to these, discrete wavelet multitone (DWMT) modulation scheme based on pulse amplitude modulation is proposed and experimentally verified for the next generation passive optical network (PON) in VLC systems in previous works 15,16 …”

Section: Introductionmentioning

confidence: 99%

“…In addition to these, discrete wavelet multitone (DWMT) modulation scheme based on pulse amplitude modulation is proposed and experimentally verified for the next generation passive optical network (PON) in VLC systems in previous works. 15,16 However, the filters used in classical discrete wavelet transform operations involve complex mathematical operations, and the lifting wavelet transform (LWT) method has been developed to reduce this. LWT, which has been used in image and signal processing applications in recent years, is used to overcome many shortcomings of standard wavelet transform.…”

Section: Introductionmentioning

confidence: 99%

“…In this study, due to above advantages of LWT conversion, a new LWT-based ACO-OFDM method (LWT-ACO-OFDM) is recommended to enhance the performance of the ACO-OFDM system by eliminating the aforementioned problems and difficulties of ACO-OFDM, and additionally, LWT conversion is applied for ACO-OFDM systems in multipath optical VLC channels. Although there have been many studies in the literature on the DWT VLC-OFDM systems, 15,16,[19][20][21] this is the first time using the combination of LWT and ACO-OFDM over the wireless optical channels (LED-photodiode), by which LWT conversion is used in ACO-OFDM systems in real VLC channel models.…”

Section: Introductionmentioning

confidence: 99%

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A novel asymmetrically clipped optical orthogonal frequency division multiplexing system based on lifting wavelet transform for visible light communications

Avcı

Aykiri

Savaşcıhabeş

et al. 2022

Int J Communication

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Summary In multicarrier visible light communication (VLC) systems, orthogonal frequency division multiplexing (OFDM) has attracted a lot of attention due to its high data rate, simple equalization, and resistance to intersymbol interference (ISI). However, high peak‐to‐average‐power ratio (PAPR) and Light Emitting Diodes (LED) nonlinearity have important effects on the performance of indoor VLC‐OFDM systems. Asymmetrically clipped optical (ACO)‐OFDM is a technique that waste spectral efficiency to transmit a single pole frequency division multiplexed signal over a single pole channel. In this study, a new ACO‐OFDM method based on lifting wavelet transform (LWT)‐ACO‐OFDM is proposed to restore this spectral efficiency and increase the performance of the ACO‐OFDM system. The performance of the proposed method is verified by computer simulation studies over additive white Gaussian noise (AWGN) channel and multipath optical channel for analytical and simulated bit error rate (BER) performance criterion. From the obtained simulation results, it is seen that the proposed method provides approximately 16‐dB SNR gain against the classic VLC‐OFDM, roughly 12‐dB Signal to Noise Ratio (SNR) improvement versus the Direct Current (DC)‐biased optical (DCO)‐OFDM, and nearly 6‐dB SNR enhancement against ACO‐OFDM on the additive white Gaussian noise channel. It is observed from computer simulation results that similar SNR gains are obtained in multipath optical channels.

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