Interference-Limited Mixed MUD-RF/FSO Two-Way Cooperative Networks Over Double Generalized Gamma Turbulence Channels

Upadhya, Abhijeet; Dwivedi, Vivek K.; Alouini, Mohamed‐Slim

doi:10.1109/lcomm.2019.2924217

Cited by 28 publications

(11 citation statements)

References 15 publications

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“…Substituting (9) and (11) into (14), the expression of ASC is given by (15), wherein four integration terms can be found as follows:…”

Section: A Average Secrecy Capacitymentioning

confidence: 99%

“…Note that all the system parameters are included in (15) and utilizing this expression provides useful insights into how the secrecy capacity performance is affected by the physical properties of the channel that can be easily analyzed. Again, (15) can be reduced to [38,Eq.…”

Section: ) Derivation Of R4mentioning

confidence: 99%

“…Hence, we also derive the asymptotic expression of SOP given in (23). Herein, the Meijer's G term in S 2 is converted into asymptotic term in (23) Similar to (15), the impact of all system parameters on the secure outage behaviour are demonstrated via (22) and (23). Additionally, for the conditions of considering Rayleigh-ΓΓ distribution (P kr = P ke = 1) and Nakagami-m-ΓΓ distribution (P kr = P ke = 2 and 3), our demonstrated results in (22) and (23) agree with [46, eqs.…”

Section: B Secrecy Outage Probabilitymentioning

confidence: 99%

“…This network was extended in [14] considering multiple amplify-and-forward (AF) relays with partial relay selection (PRS) protocol. For further extension, the impact of co-channel interference (CCI) was included in a two way relaying (TWR) system in [15]. A multihop RF-FSO link with Rician-ΓΓ distribution was also analyzed in terms on OP and ergodic achievable rates in [16].…”

Section: Introduction a Background And Related Workmentioning

confidence: 99%

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Secrecy Performance Analysis of Mixed Hyper-Gamma and Gamma-Gamma Cooperative Relaying System

et al. 2020

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In this paper, we investigate a secure dual-hop radio frequency-free space optical (RF-FSO) mixed variable gain relaying framework in the presence of a single eavesdropper. The RF and FSO links are modeled with hyper Gamma (HG) and Gamma-Gamma (ΓΓ) fading channels, respectively. We assume that the eavesdropper utilizes another HG fading channel to wiretap the transmitted confidential data from the RF link. Our key concern is to defend this information against passive eavesdropping. We carry out the secrecy measurements by deriving closed-form mathematical expressions of average secrecy capacity (ASC), secure outage probability (SOP), and strictly positive secrecy capacity (SPSC), all in terms of Meijer's G function. Capitalizing on the derived expressions, we analyze the impacts of atmospheric turbulence and pointing errors on the secrecy capacity and outage performance of the proposed scenario. For gaining more insights, we also analyze the asymptotic outage behaviour for high signal-to-noise ratio. Two detection techniques i.e. heterodyne (HD) and the intensity modulation with direct detection (IM/DD) are taken into consideration and our results demonstrate that HD technique notably outperforms the IM/DD scheme. The supremacy and novelty of the model is demonstrated via utilizing generic properties of the HG fading channel. Finally, we provide a justification of the derived expressions via Monte-Carlo simulations. INDEX TERMS Gamma-Gamma fading, eavesdropper, Hyper-Gamma fading, physical layer security, pointing error, variable gain relay.

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“…Substituting (9) and (11) into (14), the expression of ASC is given by (15), wherein four integration terms can be found as follows:…”

Section: A Average Secrecy Capacitymentioning

confidence: 99%

Section: ) Derivation Of R4mentioning

confidence: 99%

Section: B Secrecy Outage Probabilitymentioning

confidence: 99%

Section: Introduction a Background And Related Workmentioning

confidence: 99%

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Secrecy Performance Analysis of Mixed Hyper-Gamma and Gamma-Gamma Cooperative Relaying System

et al. 2020

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“…In the same context, asymmetric RF/FSO relaying systems have been introduced by the authors of Lee et al, 14 where the RF link has been assumed to undergo Rayleigh fading, whereas the FSO link undergoes Gamma–Gamma atmospheric turbulence. Similar schemes involving mixed RF/FSO have been analyzed in research works 15–22 . In Zedini et al, 15 the RF link has been modeled as Nakagami‐ m fading channel along with pointing errors on the FSO link modeled as Gamma–Gamma‐distributed fading.…”

Section: Introductionmentioning

confidence: 99%

Diversity aided millimeter‐wave/free space optical cooperative relaying systems

Goel

Upadhya

Dwivedi

2021

Int J Communication

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In this paper, we investigate the performance of mixed millimeter-wave (mmWave)/multiple input multiple output (MIMO)-free space optics (FSO) cooperative relaying system. The mmWave link is assumed to undergo multipath fading and shadowing which has been modeled as generalized-K distributed fading, whereas the diversity aided FSO link is considered to experience Gamma-Gamma turbulence. We consider amplify-and-forward (AF) relaying strategy and multiple signals arriving at the receiver are combined using equal gain combining (EGC) scheme. Analytical closed form expressions for performance metrics such as outage probability, bit error rate (BER), and the ergodic channel capacity are derived in terms of bivariate Fox's H-function for the considered mixed mmWave/MIMO-FSO relaying system. In order to further simplify the obtained results, we analyze the system performance for the case of high signal-to-noise ratio (SNR) to present the asymptotic expressions for the outage probability and BER in terms of elementary functions. To this end, we have formulated an optimum power allocation scheme which minimizes the probability of outage experienced by the end user by allocating the optimum power on the FSO link. We also analyze the proposed system for the impact of pointing errors in a separate section by deriving closed-form expressions for the outage probability and BER. Finally, numerical results have been demonstrated the findings of the research work which have supplemented by Monte Carlo simulations.

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Practical downlink satellite‐FSO/RF cooperative relays: Performance analysis and LSTM prediction

Goel,

Bhatia,

Upadhya

2024

Int J Communication

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SummaryThe present research work aims to investigate the reliability of the mixed free space optical (FSO)/radio frequency (RF) decode‐and‐forward (DF) relaying system where the satellite intends to communicate with the ground station through the unmanned aerial vehicles (UAV) as the relay node. Moreover, it has been considered that a second UAV interferes with the intended UAV. The operation of the UAVs has been represented considering the small scale fading, path loss, 3‐D location, and probability of maintaining line‐of‐sight (LoS) and non line of sight (NLoS) links, while FSO link undergoes Malaga distributed turbulence. Using the aforementioned model, the closed form expressions for the outage probability and bit error rate (BER) have been derived. The exact expressions have been extended to obtain the high signal‐to‐noise ratio (SNR) results for the outage probability and BER. The analytical expressions have been numerically evaluated and the results obtained through these expressions have been verified using the Monte Carlo simulations. More importantly, long short‐term memory (LSTM)‐based deep learning model has been trained for prediction of outage probability. The model is trained offline and then utilized to predict the values of the outage probability in online mode with mean square error (MSE) and root mean square error (RMSE) of MSE = −45.02 and RMSE = −18.34 dB.

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Interference-Limited Mixed MUD-RF/FSO Two-Way Cooperative Networks Over Double Generalized Gamma Turbulence Channels

Cited by 28 publications

References 15 publications

Secrecy Performance Analysis of Mixed Hyper-Gamma and Gamma-Gamma Cooperative Relaying System

Secrecy Performance Analysis of Mixed Hyper-Gamma and Gamma-Gamma Cooperative Relaying System

Diversity aided millimeter‐wave/free space optical cooperative relaying systems

Practical downlink satellite‐FSO/RF cooperative relays: Performance analysis and LSTM prediction

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