Outage Probability and Average BER of UAV-Assisted Dual-Hop FSO Communication With Amplify-and-Forward Relaying

Xu, Guanjun; Zhang, Ning; Xu, Maozhe; Xu, Zixuan; Zhang, Qinyu; Song, Zhaohui

doi:10.1109/tvt.2023.3252822

Cited by 70 publications

(24 citation statements)

References 42 publications

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“…Many works have focused on analysing the performance of dual-hop UAV-assisted links including optimizing the used communication technology (FSO or radio frequency (RF)), the mode of relaying system (one-way relaying or two-way relaying), the relaying protocol (amplify-and-forward (AF) or decode-and-forward(DF)). For example, authors in [25]- [27] present a dual-hop UAV-assisted systems using FSO communication technology. In [25], the performance of the proposed relaying system is studied under the AF relaying protocol while authors in [26] consider the DF relaying protocol.…”

Section: Related Workmentioning

confidence: 99%

Performance Analysis of Dual-Hop UAV-Assisted mmWave Links Considering Orientation Fluctuations

Al-Khatab,

Althunibat,

Alhasanat

et al. 2024

IEEE Access

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In emergency scenarios, infrastructure of wireless networks is usually damaged and becomes out of service. Therefore, Unmanned Aerial Vehicles (UAVs) have been widely nominated as an alternative to provide prompt and efficient wireless connectivity. To this end, UAV-assisted communication systems are recently being under investigation. In this paper, the focus is on UAV-assisted dual-hop links in which the source, relay and destination can be either ground-based or aerial nodes. Specifically, the paper analyzes the performance of these links in terms of the outage probability (OP) and the bit error rate (BER) considering eight different setups of dual-hop UAV-assisted links operating over the millimeter wave (mmWave) band. Unlike others, the performance analysis is conducted considering practical models of the channel fading, path loss, antennas gain and UAVs' fluctuations. A generalized mathematical framework is followed to obtain the cumulative distribution function (CDF) and the probability density function (pdf) of the overall signal-to-noise ratio (SNR), which are utilized to characterize closed form expressions for the average OP and BER for all proposed setups. Analytical results are validated by Monte Carlo simulations which investigate the role of many setup parameters including the number of antenna elements, the fluctuation intensity, the transmit power and the modulation order. Moreover, results indicate that increasing the number of aerial entities in the link negatively affects its performance due to the impact of the fluctuations on the directional antennas in the mmWave band.

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Section: Related Workmentioning

confidence: 99%

Performance Analysis of Dual-Hop UAV-Assisted mmWave Links Considering Orientation Fluctuations

Al-Khatab,

Althunibat,

Alhasanat

et al. 2024

IEEE Access

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“…We note that the performance of OOK systems under various fading scenarios and pointing errors has been the subject of numerous studies 2 , 10 , 12 , 13 , 21 – 25 However, the vast majority of these studies, unlike the study in this paper, focus on performance characterization of OOK or similar systems without channel estimation. To elaborate, although these receivers utilize pointing and tracking, the receivers are implemented using an uncompensated method (as one of the receivers considered above, which is named uncompensated), that is, the prior work considers a threshold that assumes away the impact of channel fading and the residual pointing error.…”

Section: Optimum Receiver Structurementioning

confidence: 99%

Receiver architecture for on-off-keying free-space optical communications with channel estimation in the presence of residual spatial tracking error

Kiasaleh

2023

Opt. Eng.

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In this work, a receiver architecture for the detention of on-off-keying (OOK) signals using adaptive signal estimation and threshold setting for free-space optical communications is investigated. It is assumed that the received signal is impaired by channel fading, modeled using Málaga (M) distribution, and an imperfect pointing acquisition. In OOK communications, knowledge of the received signal is required to set the optimum receiver threshold. To that end, a linear estimation technique is utilized to estimate the combined impact of the residual pointing error and channel fading. The performance of the resulting receiver is evaluated and is compared with those of a receiver in which the channel and pointing impairments are ignored and with a receiver in which the channel and pointing impacts are replaced by the statistical averages of those impairments. It is shown that, for reasonable system parameters, the proposed receiver offers a significant improvement in performance in terms of the overall bit error rate (BER) when compared with its alternatives. For a scenario in which a significant pointing error is present, it is observed that channel estimation does not offer a benefit in terms of the overall BER.

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“…Pioneering work has been done on drone-assisted FSO communication systems [8]. The serial FSO decode-and-forward relay system based on hovering unmanned aerial vehicles (UAVs) was optimized by Wang et al to achieve optimal communication performance [9].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of a Drone-Assisted FSO Communication System over Málaga Turbulence under AoA Fluctuations

Shen

Chen

et al. 2023

Drones

Self Cite

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Future wireless communications have been envisaged to benefit from integrating drones and free space optical (FSO) communications, which would provide links with line-of-sight propagation and large communication capacity. The theoretical performance analysis for a drone-assisted downlink FSO system is investigated. Furthermore, this paper utilizes the Málaga distribution to characterize the effect of atmospheric turbulence on the optical signal for the drone–terrestrial user link, taking into account atmospheric attenuation, pointing errors, and angle-of-arrival fluctuations. The probability density function and cumulative distribution function are then expressed in closed-form using the heterodyne detection and indirect modulation/direct detection techniques, respectively. Thereafter, the analytical expressions including the average bit error rate (BER) and the ergodic capacity are given. Particularly, the asymptotic behavior of the average BER of the considered system is presented using heterodyne detection at high optical power. The Monte Carlo simulation results certify the theoretical analytical results. Correspondingly, the field-of-view of the receiver is analyzed for optimal communication performance.

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Outage Probability and Average BER of UAV-Assisted Dual-Hop FSO Communication With Amplify-and-Forward Relaying

Cited by 70 publications

References 42 publications

Performance Analysis of Dual-Hop UAV-Assisted mmWave Links Considering Orientation Fluctuations

Performance Analysis of Dual-Hop UAV-Assisted mmWave Links Considering Orientation Fluctuations

Receiver architecture for on-off-keying free-space optical communications with channel estimation in the presence of residual spatial tracking error

Performance Analysis of a Drone-Assisted FSO Communication System over Málaga Turbulence under AoA Fluctuations

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