Adaptive transmission algorithms for a hard-switched FSO/RF link

Nock, Kristen; Font, Carlos O.; Rupar, Michael A.

doi:10.1109/milcom.2016.7795440

Cited by 5 publications

(3 citation statements)

References 12 publications

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“…Together with other observed concomitant phenomena in the atmosphere, air pressure influences the formation of atmospheric turbulence, which negatively affects the transmitted optical signal. Atmospheric turbulence makes up one quarter of the total contribution of the propagating optical beam [18].…”

Section: Depth Data Analysismentioning

confidence: 99%

Prediction of Received Optical Power for Switching Hybrid FSO/RF System

et al. 2020

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This study deals with the problem of fiber-free optical communication systems—known as free space optics—using received signal strength identifier (RSSI) prediction analysis for hard switching of optical fiber-free link to base radio-frequency (RF) link and back. Adverse influences affecting the atmospheric transmission channel significantly impair optical communications, therefore attention was paid to the practical design, as well as to the implementation of the monitoring device that is used to record and process weather information along a transmission path. The article contains an analysis and methodology of the solution of the high availability of the optical link. Attention was paid to the technique of hard free space optics (FSO)/RF-switching with regard to the amount of received optical power detected and its relation to the quantities influencing the optical communication line. For this purpose, selected methods of machine learning were used, which serve to predict the received optical power. The process of analysis of prediction of received optical power is realized by regression models. The study presents the design of the optimal data input matrix model, which forms the basis for the training of the prediction models for estimating the received optical power.

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Section: Depth Data Analysismentioning

confidence: 99%

Prediction of Received Optical Power for Switching Hybrid FSO/RF System

et al. 2020

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“…In [23]- [39], on the other hand, at-least one link is equipped with both the FSO and RF transceiver and can, possibly, switch between them or use them simultaneously. [24] proposes an adaptive algorithm for a hybrid FSO/RF communication system. In [25], [26], the performance of hybrid FSO/RF decode-and-forward (DF) relay systems is analyzed.…”

mentioning

confidence: 99%

“…Also, [29] proposes an index modulation based switching for a hybrid FSO/RF communication system. Note that in [24]- [29], hard switching method is considered, where the communication switches between the FSO and the RF links, as soon as the signal-to-noise ratio (SNR) in one of the links exceeds that of the other one. In [30], [31], switching-based hybrid FSO/RF communication systems are studied, where both the FSO and RF links are working simultaneously if the FSO link's SNR falls below threshold.…”

mentioning

confidence: 99%

Hybrid FSO/THz-Based Backhaul Network for mmWave Terrestrial Communication

Singya

Makki

D’Errico

et al. 2023

IEEE Trans. Wireless Commun.

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In this work, a hybrid free-space optics (FSO)/ teraHertz (THz) based backhaul network is considered to provide high-data-rate reliable communication to the terrestrial mobile users (MUs) operating at millimeter-wave (mmWave) bands. The FSO link is affected by atmospheric turbulence and pointing error impairments. At the FSO receiver, both intensity-modulated direct detection and heterodyne detection techniques are considered. The multi-antenna THz link suffers from high path-loss, small-scale fading, and misalignment error. To minimize the effect of back-and-forth switching, soft switching method is introduced at the access point (AP) to select the signal coming through the hybrid FSO/THz link, and a comparison with hard switching method is presented. Selective decode-and-forward relaying is considered at the AP. In this context, we derive closed-form expressions of the individual link's outage probability, end-to-end (E2E) outage probability, asymptotic outage probability, ergodic capacity, and generalized average bit-error-rate. Finally, we study the effect of different parameters such as atmospheric turbulence, pointing/misalignment errors, link distance, atmospheric attenuation/path-loss, fading parameters of the THz and access links, and number of antennas on the network performance. Our results indicate that, with a proper switching method, the joint implementation of FSO/THz links improves the rate/reliability of the backhaul links with limited switching overhead.

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