Performance Analysis of DF Based Cascaded VLC-FSO-VLC System

Deka, Rima; Anees, Sanya

doi:10.1109/commnet49926.2020.9199623

Cited by 5 publications

(7 citation statements)

References 16 publications

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“…The euclidian distance 𝑑 𝑡 of the user device is given by 𝑑 𝑡 = (𝑟 2 𝑡 + 𝐿 2 𝑉 ) 1/2 and 𝑐𝑜𝑠(𝜃 𝑡 ) = 𝑐𝑜𝑠(Ψ 𝑡 ) = 𝐿 𝑉 /𝑑 𝑡 . The PDF obtained using the change of variable method for channel gain is given by [48]…”

Section: Inside Trainmentioning

confidence: 99%

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All-Optical UAV-Based Triple-Hop FSO-FSO-VLC Cooperative System for High-Speed Broadband Internet Access in High-Speed Trains

Gunasekar,

Kumar,

Krishnan

et al. 2023

IEEE Access

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In this paper, we proposed an unmanned aerial vehicle (UAV) based all optical triple hop mixed free space optical-free space optical-visible light communication (FSO-FSO-VLC) system for broadband internet access in high-speed train applications. The system consists of triple hops from gateway to the UAV, UAV to train and train to the end user. Two decode and forward relays are mounted on the UAV and train respectively to transmit the data between the gateway to the end-users. The first hop between gateway to UAV consist of FSO link which follows M-distribution. The second hop between the UAV to train consists of FSO link and is modelled using Gamma-Gamma distribution which takes into account both atmospheric turbulence and pointing errors due to position/orientation deviation. The third hop between the train and end user is connected using VLC link and it is mathematically modelled using Lambertian emission distribution. The relays map the incoming signal on the FSO links and send it down to the user inside the train via the VLC downlink. We derived the closed form expressions for average bit error rate and outage probability of the proposed system. This paper investigates the effects of atmospheric turbulence, field of view, beam divergence angle, displacement deviation variance, optical concentrator gain, number of access point, and modulation schemes on system performance. First time, we proposed all-optical system which offers high data rate and low transmission delay.

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Section: Inside Trainmentioning

confidence: 99%

“…After applying the Binomial approximation and making the mathematical rearrangements, SNR CDF of Eq. ( 19) is given as [48]…”

Section: Inside Trainmentioning

confidence: 99%

All-Optical UAV-Based Triple-Hop FSO-FSO-VLC Cooperative System for High-Speed Broadband Internet Access in High-Speed Trains

Gunasekar,

Kumar,

Krishnan

et al. 2023

IEEE Access

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“…Some solutions of reducing the effects of atmospheric turbulence and pointing errors proposed in the literature are radio-on-FSO system [15,16], [17], [18], [19], [20], hybrid RF/FSO communication system [21], [22], [23], [24], [25], [26] multipleinput-multiple-output (MIMO) system [27], [28], and FSO based cooperative communication system [29][30][31][32]. By applying different types of relaying techniques, the coverage area of the FSO systems can be increased and also improving the performance and capacity of the system.…”

Section: Introductionmentioning

confidence: 99%

“…. By substituting the values of F γ eq (γ) from ( 14) and ( 40) in (30), the expression of BER of the RF-FSO-VLC using M-PSK modulation scheme is given by…”

mentioning

confidence: 99%

Performance Analysis of a Decode-and-Forward Based Mixed RF–FSO–VLC System

Deka,

Anees

2023

Int J Wireless Inf Networks

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In this paper, the performance analysis of a cooperative radio frequencyfree space optical communication-visible-light-communication (RF-FSO-VLC) system using decode-and-forward (DF) relays is presented. In the proposed model, the RF link acts as the core network, the FSO link is used for providing last mile connectivity for the indoor cell users communicating through VLC environment. The RF link is characterized by Nakagami-m-distributed fading, while the FSO link undergoes Double Generalized Gamma (DGG) distributed atmospheric turbulence and pointing errors and the VLC link is characterized by the Lambertian pattern of the LED. The closed-form expressions of the statistical characteristics of signal-to-noiseratio (SNR) of the DF based triple-hop system are evaluated using which various performance metrics, i.e, outage probability, bit error rate (BER), and capacity of the considered system are obtained. The numerical results show that the system's performance gets severely affected by the RF fading, atmospheric turbulence, and pointing errors. The outage performance of the system decreases as field-of-view (FOV) and the height of the light-emitting-diode (LED) increase. It is also seen from the results that the BER performance of the system is better in case of heterodyne detection as compared to direct-detection. It is also observed that the capacity of the system decreases when the effect of atmospheric turbulence and pointing error is high and it increases when the no. of LEDs increases.

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Section: Introductionmentioning

confidence: 99%

Performance Analysis of a Decode-and-forward based Mixed RF-FSO-VLC System

Deka

Anees

2022

Preprint

Self Cite

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In this paper, the performance analysis of a cooperative radio frequency-free space optical communication-visible-light-communication (RF- FSO - VLC ) system using decode-and-forward ( DF ) relays is presented. In the proposed model, the RF link acts as the core network, the FSO link is used for providing last mile connectivity for the indoor cell users communicating through VLC environment. The RF link is characterized by Nakagami - $m$ -distributed fading, while the FSO link undergoes Double Generalized Gamma ( DGG ) distributed atmospheric turbulence and pointing errors and the VLC link is characterized by the Lambertian pattern of the LED. The closed-form expressions of the statistical characteristics of signal-to-noise-ratio ( SNR ) of the DF based triple-hop system are evaluated using which various performance metrics, i.e, outage probability, bit error rate ( BER ), and capacity of the considered system are obtained. The numerical results show that the system's performance gets severely affected by the RF fading, atmospheric turbulence, and pointing errors. The outage performance of the system decreases as field-of-view ( FOV ) and the height of the light-emitting-diode (LED) increase. It is also seen from the results that the BER performance of the system is better in case of heterodyne detection as compared to direct-detection. It is also observed that the capacity of the system decreases when the effect of atmospheric turbulence and pointing error is high and it increases when the no. of LEDs increases.

show abstract

Performance Analysis of DF Based Cascaded VLC-FSO-VLC System

Cited by 5 publications

References 16 publications

All-Optical UAV-Based Triple-Hop FSO-FSO-VLC Cooperative System for High-Speed Broadband Internet Access in High-Speed Trains

All-Optical UAV-Based Triple-Hop FSO-FSO-VLC Cooperative System for High-Speed Broadband Internet Access in High-Speed Trains

Performance Analysis of a Decode-and-Forward Based Mixed RF–FSO–VLC System

Performance Analysis of a Decode-and-forward based Mixed RF-FSO-VLC System

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