Free space optical connectivity for last mile solution in Bangladesh

Saquib, Nazmus; Sakib, Md. Sabbir Rahman; Saha, A.; Hussain, Maaruf

doi:10.1109/icetc.2010.5529338

Cited by 14 publications

(11 citation statements)

References 2 publications

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“…The analytical SER performance expressions obtained in (18), (19), and (20) are exact and can be easily estimated accurately by utilizing the Gauss-Chebyshev Quadrature (GCQ) formula [31,Eq. (25.4.39)] that converges rapidly, requiring only few terms for an accurate result [11].…”

Section: A Higher-order Amount Of Fadingmentioning

confidence: 99%

“…1, there exists no fiber optics structure between the buildings. Since similar optical transmitters and detectors are used for FSO and fiber optics, similar bandwidth capabilities are achievable [18]. Therefore, this will get the required job done saving numerous amount of economic resources by utilizing FSO instead of digging up the current brownfield to install fiber optics between the different buildings.…”

mentioning

confidence: 99%

“…we can multiplex users with RF only capability into a single FSO link. This comes with the reasoning that there exists a connectivity gap between the backbone network and the last-mile access network and hence this last mile connectivity can be delivered via high-speed FSO links [18]. For instance, in developing countries where there might not be much of a fiber optic structure and hence to increase its reach and bandwidth to the last mile, it will require huge amount of economic resources to dig up the current brown-field.…”

mentioning

confidence: 99%

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Impact of Pointing Errors on the Performance of Mixed RF/FSO Dual-Hop Transmission Systems

Ansari

Yılmaz

Alouini

2013

IEEE Wireless Commun. Lett.

278

168

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Abstract-In this work, the performance analysis of a dualhop relay transmission system composed of asymmetric radiofrequency (RF)/free-space optical (FSO) links with pointing errors is presented. More specifically, we build on the system model presented in [1] to derive new exact closed-form expressions for the cumulative distribution function, probability density function, moment generating function, and moments of the end-to-end signal-to-noise ratio in terms of the Meijer's G function. We then capitalize on these results to offer new exact closed-form expressions for the higher-order amount of fading, average error rate for binary and M -ary modulation schemes, and the ergodic capacity, all in terms of Meijer's G functions. Our new analytical results were also verified via computer-based MonteCarlo simulation results.

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Section: A Higher-order Amount Of Fadingmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Impact of Pointing Errors on the Performance of Mixed RF/FSO Dual-Hop Transmission Systems

Ansari

Yılmaz

Alouini

2013

IEEE Wireless Commun. Lett.

278

168

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show abstract

“…we can multiplex users with RF only capability into a single FSO link. This comes with the reasoning that there exists a connectivity gap between the backbone network and the lastmile access network and hence this last mile connectivity can be delivered via high-speed FSO links [9]. For instance, in developing countries where there might not be much of a fiber optic structure and hence to increase its reach and bandwidth to the last mile, it will require huge amount of economic resources to dig up the current brown-field.…”

Section: Introductionmentioning

confidence: 99%

A performance study of two hop transmission in mixed underlay RF and FSO fading channels

Ansari

Abdallah

Alouini

et al. 2014

2014 IEEE Wireless Communications and Networking Conference (WCNC)

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In this work, we present the performance analysis of a dual-hop transmission system composed of asymmetric radio frequency (RF) and free-space optical (FSO) links in underlay cognitive networks. For the RF link, we consider an underlay cognitive network where the secondary users share the spectrum with licensed primary users, where indoor femtocells act as a practical example for such networks. More specifically, we assume that the RF link is subject to an interference constraint. The FSO link accounts for pointing errors and both types of detection techniques (i.e. intensity modulation/direct detection (IM/DD) as well as heterodyne detection). On the other hand, RF link is modeled by the Rayleigh fading distribution that applies power control to maintain the interference at the primary network below a specific threshold whereas the FSO link is modeled by a unified Gamma-Gamma fading distribution. With this model, we derive new exact closed-form expressions for the cumulative distribution function, the probability density function, the moment generating function, and the moments of the endto-end signal-to-interference plus noise ratio of these systems in terms of the Meijer's G functions. We then capitalize on these results to offer new exact closed-form expressions for the outage probability, the higher-order amount of fading, and the average error rate for binary and M -ary modulation schemes, all in terms of Meijer's G functions. All our new analytical results are verified via computer-based Monte-Carlo simulations and are illustrated by some selected numerical results.Index Terms-Asymmetric dual-hop relay system, optical wireless communications, free-space optical (FSO) communications, cognitive radio, underlay cognitive radio, spectrum sharing, mixed radio frequency (RF)/FSO systems.

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“…Also, the spectrum for FSO transmission is unlicensed, [3][4][5] and the larger capacity of the FSO systems helps to transmit the multiplexed data of large number of RF users on an FSO link. 6 Moreover, the transmission over the FSO channels is primarily point-to-point with line of sight (LOS) capability, causing lesser interference as compared to the RF transmission in a broadcasting manner.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of a variable‐gain amplify‐and‐forward relayed mixed RF‐FSO system

Khanna

Aggarwal

Ahuja

2017

Int J Communication

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SummaryIn this work, an amplify-and-forward variable-gain relayed mixed RF-FSO system is studied. The considered dual-hop system consists of a radio frequency (RF) link followed by a free space optical (FSO) channel. The RF link is affected by short-term multipath fading and long-term shadowing effects and is assumed to follow the generalized-K fading distribution that approximates accurately several important distributions often used to model communication channels.The FSO channel experiences fading caused by atmospheric turbulence that is modeled by the gamma-gamma distribution characterizing moderate and strong turbulence conditions. The FSO channel also suffers path loss and pointing error induced misalignment fading. The performance of the considered system is analyzed under the collective influence of distribution shaping parameters, pointing errors that result in misalignment fading, atmospheric turbulence, and path loss. The moment-generating function of the Signal power to noise power ratio measured end-to-end for this system is derived. The cumulative distribution function for the Signal power to noise power ratio present between the source and destination receiver is also evaluated. Further, we investigate the error and outage performance and the average channel capacity for this system. The analytical expressions in closed form for the outage probability, symbol and bit error rate considering different modulation schemes and channel capacity are also derived. The mathematical expressions obtained are also demonstrated by numerical plots. KEYWORDSchannel capacity, fading, free space optical communication, probability of outage, radio frequency communication, symbol error rate

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Free space optical connectivity for last mile solution in Bangladesh

Cited by 14 publications

References 2 publications

Impact of Pointing Errors on the Performance of Mixed RF/FSO Dual-Hop Transmission Systems

Impact of Pointing Errors on the Performance of Mixed RF/FSO Dual-Hop Transmission Systems

A performance study of two hop transmission in mixed underlay RF and FSO fading channels

Performance analysis of a variable‐gain amplify‐and‐forward relayed mixed RF‐FSO system

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