Beam Tracking with Photon-Counting Detector Arrays in Free-Space Optical Communications

Bashir, Muhammad Salman; Alouini, Mohamed‐Slim

doi:10.48550/arxiv.2001.04007

Cited by 2 publications

(7 citation statements)

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“…Beam tracking introduces a suitable mechanism for systems with limited payloads as UAVs, where photodetectors are mounted at the receiver terminal, replacing the PAT unit. Practically the PAT system requiring higher weight is placed instead at the ground terminal (Safi et al 2019(Safi et al , 2021Bashir and Alouini 2020). Atmospheric air fluctuations and the internal hovering fluctuations of UAVs, position, and orientation fluctuations are unneglectable.…”

Section: Beam Tracking Approachmentioning

confidence: 99%

“…Introducing a mobile terminal of balloons or UAVs as a transmitter terminal as shown in Fig. 4 (Bashir and Alouini 2020). The mathematical analysis of the photodetector array in Bashir and Alouini (2020) is introduced by the author in Bashir (2019).…”

Section: Beam Tracking Approachmentioning

confidence: 99%

“…4 (Bashir and Alouini 2020). The mathematical analysis of the photodetector array in Bashir and Alouini (2020) is introduced by the author in Bashir (2019).…”

Section: Beam Tracking Approachmentioning

confidence: 99%

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A review on pointing, acquisition, and tracking approaches in UAV-based fso communication systems

2022

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The challenge of tracking unmanned aerial vehicles (UAVs) is arising out of increasing their market and spread usage in many applications. Miscuing UAVs can lead to potential threats as they are considered an essential part of national security. One of the major issues in communication with UAVs is the enormous amount of data generated by UAVs that requires a high data rate link, making the free space optics (FSO) communication, with very high bandwidth, an appropriate choice. Consequently, current developments in UAVs have provided new horizons for establishing UAV-based FSO links. However, FSO is a narrow line of sight (LoS) technology that is highly affected by the misalignment between the transmitter and receiver. So, tracking mechanisms are of vital importance when considering UAV-based FSO communication systems. This paper addresses coarse to fine pointing, acquisition, and tracking (PAT) approaches and the recently developed tracking approaches to establish a reliable link for communication. Also, the various approaches are discussed and compared for precise alignment between the ground station and its associated UAV, highlighting their advantages and limitations. Current challenges and future research directions are addressed and integrated by combining different ideas.

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Section: Beam Tracking Approachmentioning

confidence: 99%

Section: Beam Tracking Approachmentioning

confidence: 99%

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A review on pointing, acquisition, and tracking approaches in UAV-based fso communication systems

2022

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“…Optical beam tracking using detector arrays has recently been studied assuming the photoncounting regime, e.g., a deep-space optical communication setting [7]- [10]. For instance, the photodetection was modeled by a non-homogeneous Poisson process [7], and two filtering methods, i.e., a Kalman filter and a particle filter, were proposed for tracking the beam position.…”

mentioning

confidence: 99%

“…Meanwhile, the beam position estimation problem was examined [9] for photon-counting detector arrays and the Cramér-Rao lower bounds were derived for the variance of unbiased estimators. Furthermore, beam tracking algorithms were proposed [10] using received photon counts during an observation interval as a sufficient statistic for tracking the beam position.…”

mentioning

confidence: 99%

Beam Tracking for UAV-Assisted FSO Links With a Four-Quadrant Detector

Safi¹,

Dargahi²,

Cheng³

2021

Preprint

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A ground-to-air free-space optical link is studied for a hovering unmanned aerial vehicle (UAV) having multiple rotors. For this UAV, a four-quadrant array of photodetectors is used at the optical receiver to alleviate the adverse effect of hovering fluctuations by enlarging the receiver field-ofview. Extensive mathematical analysis is conducted to evaluate the beam tracking performance under the random effects of hovering fluctuations. The accuracy of the derived analytical expressions is corroborated by performing Monte-Carlo simulations. It is shown that the performance of such links depends heavily on the random fluctuations of hovering UAV, and, for each level of instability there is an optimal size for the array that minimizes the tracking error probability Index Terms FSO, four-quadrant detector, UAV. I. INTRODUCTIONRecently, unmanned aerial vehicle (UAV) communications have attracted significant interest due to many advantageous such as fast deployment, flexible configuration, and possibility of having better channel conditions. Furthermore, technological advances of UAVs along with their reduced production costs have made future cellular networks more likely to be equipped with UAVs as flying base stations (BSs) [1]. Nevertheless, existing terrestrial wireless networks may experience radio interference when UAVs are used as aerial BSs, making it challenging to implement a practical aerial RF link. UAVs and free-space optical (FSO) based communicaiton systems have been recently proposed as a promising approach for the next generation wireless network [2], where the aerial communication links are free of radio interference. FSO links offer higher bandwidth and security than the conventional RF H. Safi and A. Dargahi are with the

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Beam Tracking with Photon-Counting Detector Arrays in Free-Space Optical Communications

Cited by 2 publications

References 0 publications

A review on pointing, acquisition, and tracking approaches in UAV-based fso communication systems

A review on pointing, acquisition, and tracking approaches in UAV-based fso communication systems

Beam Tracking for UAV-Assisted FSO Links With a Four-Quadrant Detector

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