Free Space Optical Communication System under Different Weather Conditions

Kumar, Ashish

doi:10.9790/3021-031225258

Cited by 19 publications

(4 citation statements)

References 6 publications

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“…3R Regenerator and BER Analyzer at end of receiver to analyzed the Bit Error Rate and Qfactor. [6] The "Fig. 2" show the receiver section of WDM-FSO system System I.…”

Section: Fig2 Transmitter Sectionmentioning

confidence: 99%

SIMULATIVE INVESTIGATION OF 16X5 GB/S & 16X10 GB/S WDM-FSO TRANSMISSION SYSTEM UNDER DIFFERENT ATMOSPHERIC CONDITIONS

Kaur¹,

Kaur²

2017

ijarcs

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In Free Space Optic (FSO) system free space requires as a communication media. Atmospheric attenuation due to communication media can degrade a system performance. To overcome this losses BER or Q-factor of a system are improved by using different type of photodetector at receiver side & using optical receiver at link.. This paper describe the design and simulation of 16-channel WDM based Free Space Optical communication link under various Atmospheric conditions at different bit rates (5Gbps/10Gbps) using APD & PIN photo-detector & the performance of system using APD & PIN photo-detector is compared. The NRZ modulation format & semiconductor optical amplifier (SOA) is used in this design. In this simulation it observed that APD photo-detector at bit rate 5Gbps/10Gbpsgive better performance at higher attenuation.

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“…3R Regenerator and BER Analyzer at end of receiver to analyzed the Bit Error Rate and Qfactor. [6] The "Fig. 2" show the receiver section of WDM-FSO system System I.…”

Section: Fig2 Transmitter Sectionmentioning

confidence: 99%

SIMULATIVE INVESTIGATION OF 16X5 GB/S & 16X10 GB/S WDM-FSO TRANSMISSION SYSTEM UNDER DIFFERENT ATMOSPHERIC CONDITIONS

Kaur¹,

Kaur²

2017

ijarcs

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“…These are significantly larger than a wavelength of an optical light source. These remained in the atmospheric layer for a short interval of time, so due to these factors, the rain has less effect on the performance of wireless optical communication as compared to other environmental factors [18]. The link distance is another geometrical design parameter of the FSO communication system.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Dual-Beam Free Space Optical Communication Link under Dust and Rain Conditions

Yasir

Abas

Rauf

et al. 2022

Wireless Communications and Mobile Computing

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Free space optical (FSO) communication has become an enduring and well-established communication technology in the last few decades with several advantages of high data rate, enormous bandwidth, low power consumption, transportable technology without right of way, and inherently secure line of a sight communication system. The invisible, intensity-modulated signal of light propagated through the air and detected on the receiver side experiences attenuation because of uneven distribution of rain droplets, suspended dust aerosol particles, and the droplet size distribution of fog particles in atmospheric layer degrade performance of FSO communication link. The ever-increasing demand for high data rate has quest for an innovative research for a communication link. In this paper, the performance of a dual-beam FSO communication link is evaluated under rain and dust as attenuation conditions. The system parameters, such as link distance transmitted and received power, link distance, diameter of transmitter and receiver aperture, and divergence angle, are optimized for a metropolitan FSO communication link. Dual-beam FSO communication signal propagated through an estimated attenuation level at 30 dBm transmitted power for link distance up to 2.5 km. The optical power splitter and power combiners are used in the simulation to estimate different channel parameters without the MIMO technique. The information signal of the 10 Gbps data rate is internally modulated using the NRZ generator, externally modulated by the Mach-Zehnder, and an optical signal transmitted through a dual-beam optical spectrum frequency of 193.1 THz using power splitter technique apart from each other. A comprehensive analysis is performed to design and assess robust optical communication systems through efficiency parameters such as received power, optical signal-to-noise ratio (OSNR), bit error rate (BER), and Q-factors. Results show that received optical power is a weather-dependent variable that shows a decreasing pattern as weather attenuation increases. Likewise, Q-factor and OSNR show similar decreasing trend with introduction of rain and dust as attenuator; however, BER increases in presence of attenuation.

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“…Fog is the major challenge to FSO communications, since the size of the fog's particles is comparable to the optical wavelengths. It can modify light characteristics or completely prevent the passage of light and causes absorption, scattering and reflection [3,4,5]. Also, heavy rain/snow affect strongly the FSO transmission [6].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of FSO link throughput in Qatar

Hussain

Touati

Elamri

et al. 2015

2015 4th Mediterranean Conference on Embedded Computing (MECO)

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Despite the vibrant advantages of Free Space Optics (FSO) technology and the variety of its applications, its widespread adoption has been hampered by rather disappointing link reliability for long-range links due to atmospheric turbulence-induced fading and sensitivity to detrimental climate conditions. A major challenge of such hybrid systems is to provide a strong backup system with soft-switching capabilities when the FSO link becomes down. The specific objective of this work is to study for the first time in Qatar and the Gulf Cooperation Council (GCC) the link capacity, link availability, and link outage of an FSO system with Radio Frequency (RF) back up (i.e. hybrid FSO/RF). In order to analyze the two transport media, we have designed a network sniffer application in Linux and embedded it in FPGA. We have installed new FSO/RF terminals and configure and align them successively. In the reporting period, we carry out measurements and relate them to real-time weather conditions. The relative humidity, which is due to high temperature and does not generally form fogs, was found to be the main factor degrading the FSO link throughput rather than the fog as reported in previous studies in Europe and North America.

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Free Space Optical Communication System under Different Weather Conditions

Cited by 19 publications

References 6 publications

SIMULATIVE INVESTIGATION OF 16X5 GB/S & 16X10 GB/S WDM-FSO TRANSMISSION SYSTEM UNDER DIFFERENT ATMOSPHERIC CONDITIONS

SIMULATIVE INVESTIGATION OF 16X5 GB/S & 16X10 GB/S WDM-FSO TRANSMISSION SYSTEM UNDER DIFFERENT ATMOSPHERIC CONDITIONS

Performance Analysis of Dual-Beam Free Space Optical Communication Link under Dust and Rain Conditions

Evaluation of FSO link throughput in Qatar

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