Reducing the effect of scintillation in FSO system using coherent based homodyne detection

Sahota, Jasjot Kaur; Dhawan, Divya

doi:10.1016/j.ijleo.2018.06.019

Cited by 16 publications

(7 citation statements)

References 8 publications

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“…The findings showed that after using Homodyne detection, BER value has decreased significantly to low value. A comparative study of Direct Detection and coherent Homodyne-based detection [126] was conducted, validating that the Homodyne technique is more effective than the direct technique. The results showed that the BER value achieved for Direct Detection was 3.33e−1 while the BER achieved for Homodyne detection was 1.55e−5 for moderate scintillation power [127].…”

Section: D12) Techniques Used In Reduction Of Scintillation Effect mentioning

confidence: 88%

“…Different researchers used different techniques to reduce this effect. As it is suggested by [126] using coherent-based Homodyne detection, is an alternative method used in FSO system to reduce the scintillation effect. Homodyne detection is a wellknown and efficient way to combine the signal field and a local oscillator reference field through a square law detector that helps to overcome the scintillation effect.…”

Section: D12) Techniques Used In Reduction Of Scintillation Effect mentioning

confidence: 99%

“…The modified system consists of the Homodyne technique applied to the FSO system's receiver section [126]. The findings showed that after using Homodyne detection, BER value has decreased significantly to low value.…”

Section: D12) Techniques Used In Reduction Of Scintillation Effect mentioning

confidence: 99%

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A Survey of Free Space Optics (FSO) Communication Systems, Links, and Networks

et al. 2021

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Section: D12) Techniques Used In Reduction Of Scintillation Effect mentioning

confidence: 88%

Section: D12) Techniques Used In Reduction Of Scintillation Effect mentioning

confidence: 99%

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A Survey of Free Space Optics (FSO) Communication Systems, Links, and Networks

et al. 2021

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“…This is the most common turbulence effect, and it results in irradiance fluctuations and fading of the received beam. 52,53 This scintillation effect is measured in terms of scintillation index (also known as the normalized variance of irradiance, σ 2 I ). Rytov variance, σ 2 R , also called variance of log irradiance, is a convenient parameter denoting the strength of scintillation, and it is given as 54…”

Section: Turbulence-induced Fadingmentioning

confidence: 99%

Review on UAV-based FSO links: recent advances, challenges, and performance metrics

Gupta,

Dhawan,

Gupta

2023

Opt. Eng.

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With the rapid advancements in wireless technology, the incorporation of unmanned aerial vehicles (UAVs) in free space optical (FSO) communication can reap several benefits related to coverage, security, and capacity. The parameters involved for the analysis of such systems are studied in detail. The irradiance fluctuations in the received beam due to turbulence induced fading and geometric and misalignment effects are to be taken care of in order to minimize the bit error rate. The random variables involved in a UAV-employed FSO link are larger than that present in an FSO system. Thus, efficient designing of a UAV-employed FSO system is relatively more challenging as compared to a ground-based terrestrial FSO link. There are many performance metrics that can be defined and are to be analyzed in order to optimize the parameters associated with UAV-based FSO systems and design a link with good quality of service. Some recent methods are also explored for further improving the reliability and coverage of UAV based FSO networks.

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“…In the present work, signal is detected taking the advantage of homodyne detection in order to improve the receiver sensitivity. This technique serve as a solution for reducing the scintillation effect [17].Homodyne detection includes the merging of the received signal with the local oscillator signal (having identical frequency and phase as that of the signal received) prior to the photo detection. This detection is a moderately simple method of intensifying the photo current by rising the power of local oscillator.…”

Section: Wavelength Division Multiplexing (Wdm) Technique In Conjunction With Multibeam Fso Offers Manymentioning

confidence: 99%

Mitigation of Scintillation effects in WDM-FSO system using Homodyne detection

Rani

Singh

Kaur

2021

Optik

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Free Space Optics is a line of sight communication which transmits a very narrow beam width. FSO offers high bandwidth and higher data rate up to 10Gbps. FSO units are transportable, compact and are easy to redeploy. With so many advantages of FSO there exists serious limitations of atmospheric effects which makes it ine cient for long reach transmission. Environment factors act as barriers in e cient utilization of FSO technology. A major issue in FSO links is the turbulence induced fading which severely deteriorates the link performance, hence need to be alleviated for the e cient use of this rapidly emerging technology. Various researches have been carried out in FSO eld to minimize the effect of turbulence induced scintillation. One such technique has been employed in this paper in which coherent based homodyne detection is utilized in conjunction with multibeam technique in WDM-FSO system with aim to reduce the scintillation effect. The performance comparison of the homodyne detection and direct detection in terms of bit error rate, Q-factor, and eye diagram has been explored for the scintillating effect.

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Reducing the effect of scintillation in FSO system using coherent based homodyne detection

Cited by 16 publications

References 8 publications

A Survey of Free Space Optics (FSO) Communication Systems, Links, and Networks

A Survey of Free Space Optics (FSO) Communication Systems, Links, and Networks

Review on UAV-based FSO links: recent advances, challenges, and performance metrics

Mitigation of Scintillation effects in WDM-FSO system using Homodyne detection

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