Switching-Based Cooperative Decode-and-Forward Relaying for Hybrid FSO/RF Networks

Sharma, Shubha; Madhukumar, A. S.; Swaminathan, R

doi:10.1364/jocn.11.000267

Cited by 70 publications

(76 citation statements)

References 34 publications

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“…(13)]

\begin{matrix} right leftthickmathspace.5em \\ f_{I^{j}} (I) & = \frac{ξ_{j}^{2} α_{j} β_{j}}{A_{0}^{j} I_{l}^{j} Γ (α_{j}) Γ (β_{j})} \\ \times G_{1, 3}^{3, 0} (\frac{α_{j} β_{j}}{A_{0}^{j} I_{l}^{j}} I| \begin{matrix} ξ_{j}^{2} \\ ξ_{j}^{2} - 1, α_{j} - 1, β_{j} - 1 \end{matrix}), \end{matrix}

where

G_{p, q}^{m, n} ()(\cdot)

is the Meijer G ‐function [27, Eq. (9.301)],

j \in falsefalse{S D, S R, R D falsefalse}

α_{j}

and

β_{j}

represent the effective numbers of small‐ and large‐scale turbulence parameters, respectively, related to atmospheric conditions [22, Eq. (8)],

ξ_{j}

is the pointing errors coefficient, which is given by [25, Eq.…”

Section: System and Channel Modelmentioning

confidence: 99%

“…In [20], the data rate and link availability analyses are presented for the SH hybrid FSO/RF system. The idea has been extended in [21, 22] for a DH system to increase the coverage and diversity. In [21], the outage probability analysis is presented for DH switching‐based hybrid FSO/RF system, where FSO and RF sub‐systems transmit using a two phase transmission protocol and the data is combined at the destination using SC scheme.…”

Section: Introductionmentioning

confidence: 99%

“…In [21], the outage probability analysis is presented for DH switching‐based hybrid FSO/RF system, where FSO and RF sub‐systems transmit using a two phase transmission protocol and the data is combined at the destination using SC scheme. In [22], both outage probability and average SER analyses are presented for DH switching‐based hybrid FSO/RF system using MRC scheme. It is important to note that the above‐mentioned hybrid FSO/RF systems do not consider the misalignment condition between the transmitter and receiver apertures and the effects of transmit beam waist, detector size, and jitter variance.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Performance optimisation for dual‐hop hybrid FSO/RF system with selection combining

Sharma

Madhukumar

Swaminathan

2020

IET Optoelectronics

Self Cite

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“…(13)]

\begin{matrix} right leftthickmathspace.5em \\ f_{I^{j}} (I) & = \frac{ξ_{j}^{2} α_{j} β_{j}}{A_{0}^{j} I_{l}^{j} Γ (α_{j}) Γ (β_{j})} \\ \times G_{1, 3}^{3, 0} (\frac{α_{j} β_{j}}{A_{0}^{j} I_{l}^{j}} I| \begin{matrix} ξ_{j}^{2} \\ ξ_{j}^{2} - 1, α_{j} - 1, β_{j} - 1 \end{matrix}), \end{matrix}

where

G_{p, q}^{m, n} ()(\cdot)

is the Meijer G ‐function [27, Eq. (9.301)],

j \in falsefalse{S D, S R, R D falsefalse}

α_{j}

and

β_{j}

represent the effective numbers of small‐ and large‐scale turbulence parameters, respectively, related to atmospheric conditions [22, Eq. (8)],

ξ_{j}

is the pointing errors coefficient, which is given by [25, Eq.…”

Section: System and Channel Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Performance optimisation for dual‐hop hybrid FSO/RF system with selection combining

Sharma

Madhukumar

Swaminathan

2020

IET Optoelectronics

Self Cite

View full text Add to dashboard Cite

“…To the best of our knowledge, the solution of the integral in (20) is not available in exact closed-form nor in terms of the bivariate Fox's H function because of the change in the limit of the integral. Therefore, first, we make variables change where the integral in the right side of (20) becomes…”

Section: Ergodic Capacitymentioning

confidence: 99%

“…In [19], DF RFFSO multi-hop and mesh networks with multiple-input-single-output (MISO) RF was investigated in terms of outage probability and ergodic rates with and without hybrid automatic repeat request (HARQ). In [20], the performance of a DF dual-hop hybrid FSO/RF system with maximal ratio combining (MRC) at the destination was analyzed in terms of outage probability and average symbol error rate (SER) where the FSO link is modeled by Gamma-Gamma distribution and the RF link is characterized by Nakagami-m fading. The effect of pointing errors on the system performance was investigated in [21].…”

Section: Introductionmentioning

confidence: 99%

On the Performance Analysis of Decode-and-Forward Multi-Hop Hybrid FSO/RF Systems With Hard-Switching Configuration

Alathwary

Altubaishi

2019

IEEE Photonics J.

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In this paper, we introduce a decode-and-forward multi-hop hybrid free-space optical/radio frequency (FSO/RF) system. The FSO link is assumed to follow Gamma-Gamma distribution with the combined effects of pointing errors and path loss under intensity modulation with direct detection technique, and the RF link is assumed to follow Nakagamim distribution. In particular, we derive closed-form expressions for the outage probability and ergodic capacity and analyze the system performance under the effect of different weather conditions in addition to the effect of pointing errors. The results show that the multi-hop hybrid system improves the performance even under adverse weather conditions and strong pointing errors. Furthermore, Monto Carlo simulations are provided for validation.

show abstract

A Mach–Zehnder modulator based novel regenerator for employment in relays used in free space optical communication

Ahmad

Mirza

Aljohani

et al. 2021

Trans Emerging Tel Tech

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Relay nodes that are proposed for extending the length of free space optical links are generally based upon simple optical amplifiers. In this article, we have proposed an all‐optical relay that performs regeneration of optical signals along with the conventional optical amplification. Our proposed regenerator is based upon a dual‐drive Mach–Zehnder modulator. The optical pulsed signal received at the input of the regenerator is divided into two outputs using an optical splitter. One of the splitter outputs is converted into an electrical signal while the signal in the other path is given as input to the optical modulator. The negative slope of the modulator is used to compress intensity fluctuations over the pulsed optical signal by combining the converted electrical signal with the bias voltage of the modulator. We have compared the performance of our proposed regeneration scheme with the conventional optical amplifier based relay nodes in a free space optical link that is modeled by the Gamma–Gamma channel model. To simulate the effect of medium and strong turbulence of the free space optical link, the refractive index structure parameters chosen for the Gamma–Gamma channel model are 0.5×10−14 and 0.5×10−9m−2/3, respectively. It was observed that our proposed dual‐drive Mach–Zehnder modulator based relay significantly improves the receiver sensitivity by 4 dB under strong turbulence conditions and by 0.7 dB under medium turbulence conditions, respectively.

show abstract

Switching-Based Cooperative Decode-and-Forward Relaying for Hybrid FSO/RF Networks

Cited by 70 publications

References 34 publications

Performance optimisation for dual‐hop hybrid FSO/RF system with selection combining

Performance optimisation for dual‐hop hybrid FSO/RF system with selection combining

On the Performance Analysis of Decode-and-Forward Multi-Hop Hybrid FSO/RF Systems With Hard-Switching Configuration

A Mach–Zehnder modulator based novel regenerator for employment in relays used in free space optical communication

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