Hybrid Optical-Radio Transmission System Link Quality: Link Budget Analysis

Kashif, Hasnain; Khan, Muhammad Nasir; Altalbe, Ali

doi:10.1109/access.2020.2981661

Cited by 35 publications

(31 citation statements)

References 33 publications

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“…The study of digital coherent combing (DCC) method is to provide high sensitivity signals in minimizing the complexity of the algorithm used for FSOC [13]. The researchers have study the challenges in the FSOL proposing a technique as a solution to overcome them in [14]. Researcher have display an acceptable eye diagram in four-level pulse amplitude modulation (PAM4) analysis with wavelength division multiplexing (WDM) in FSOL [15].…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Free-space optical link optimization in visible light communication system

Ngene

Thakur

Singh

2022

Journal of Optical Communications

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Free space optical communication is a potential technology that exploits the visible light frequency band for communication. In this paper, a free-space optical link (FSOL) optimization in visible light communication (VLC) is used to improve the channel performance for signal strength and analyze the effect of signal failures in a communication system. The data transmission and reception phenomenon are established using a light-emitting diode (LED) as a carrier at transmitter and photodiode as a detector at the receiver, respectively. The OptiSystem tool uses to optimize the component parameters of this proposed communication system. The bit error rate (BER) analyzer displays the signals as an eye diagram with the challenges of components uncertainty for better signal performance. The optimized components solve the problem encountered transmitting improve and enhance the signals strength. The acceptable eye diagram displayed from the BER analyzer has been resolved as a result of component optimizations by adding and removing noise to ascertain the behavior of the channel. A better signal retrieve by the display of the acceptable eye diagram from the OptiSystem software used. The FSOL components optimization improve the loss of data, weak signal, loss of power, signal failure, and signal errors which guarantee multi-mobile users with the shared signal. OptiSystem software package used to fully characterize the FSOL system.

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Section: Theoretical Backgroundmentioning

confidence: 99%

Free-space optical link optimization in visible light communication system

Ngene

Thakur

Singh

2022

Journal of Optical Communications

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“…Overall performance degrading components in the FSO systems because mainly at large distances are the induced fading of disturbances or turbulence occurrences [26]. For the FSO systems, typical decay can last milliseconds and it operates at the rate of several gigabits per seconds (GBps).…”

Section: Climate Attenuation Coefficientmentioning

confidence: 99%

Outage Probability Analysis of Free Space Communication System Using Diversity Combining Techniques

Kashif¹,

Khan²

2022

Computers, Materials &Amp; Continua

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Recently, free space optical (FSO) communication is gaining much attention towards the research community. The reason for this attention is the promises of high data-rate, license-free deployment, and non-interfering links. It can, however, give rise to major system difficulties concerning alignment and atmospheric turbulence. FSO is the degradation in the signal quality because of atmospheric channel impairments and conditions. The worst effect is due to fog particles. Though, Radio Frequency (RF) links are able to transmit the data in foggy conditions but not in rain. To overcome these issues related to both the FSO and RF links. A free space communication system (FSCS) is proposed, in which the hybrid technology is based on the individual FSO and RF channel. FSCS is a capable solution to overcome the difficulties of the existing systems (FSO and RF) as well as to enhance the overall link reliability and availability. In this paper, FSCS is investigated in terms of performance throughput (i.e., outage probability and bit-error-rate (BER)) by implementing the receive diversity combining techniques. An analysis of the outage probability of the proposed system along with the individual FSO and RF system is developed. Simulation results are presented to support the analysis. It is shown that the proposed system outperforms the individual FSO and RF system and gives a power gain of 3dB over a distinct number of receive antennas.

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“…This study reveals that physical based model [11][12][13][14][15][16][17][18][19][20][21][22]. The SWAT model can be used to identify the Best Management Practices (BMP's) under what if scenarios, thus providing useful information to the water quality managers for making effective plans to control water pollution due to nonpoint source, a data frame for developing the Total Daily Maximum Load (TDML), the awareness regarding the water quality management through modeling approach [23][24][25][26][27][28][29][30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Water Quality Modeling Using Soil and Water Assessment Tool: A Case Study of Rawal Watershed

Qayyum

Shakoor

2022

PJOSR

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The water quality of Rawal watershed has been highly deteriorated because of increased concentration of organic nitrogen and phosphorous coming from non-point sources causing eutrophication. The main objective of this study was to use a watershed scale model SWAT (Soil & Water Assessment Tool) as a modeling tool for predicting the impact of the Land Use change on water quality of Rawal Lake. Specific objectives were to (a)develop pollution source inventory mapping(b) quantify the pollutant load (organic nitrogen and phosphorus) with respect to Land Use change that causes eutrophication and (c) model the alternative Best Management Practices (BMP’s) and evaluate their effectiveness. In the pre field phase the collection and preprocessing of data (DEM & Landsat images (30m resolution)) was done. Land Use (2001 & 2010) classification was done using Landsat imagery in ArcGIS. For the pollution source inventory, mapping the study area was surveyed. In the post field phase the model was calibrated (2002-2006) by using the observed and simulated surface runoff data and then validated (2007-2010) .The, model’s accuracy was further verified by using R2 and Nash Sutcliffe Efficiency (NSE). SWAT simulations resulted in 392.40 % and 391.72 % increase in the quantity of organic nitrogen and phosphorus with respect to Land Use change (2001 & 2010). By the application of BMP’s such as filter strips, the average reduction in the concentration of N could be 75.155% while that of P could be 96.93%, similarly by the application of terracing the average reduction in the concentration of N could be 52.73% while that of P could be 94.18% in the selected sub basins. By the application of contouring the average reduction of 35.64% for N and 92.09% for P could be achieved. This study would provide decision maker a source of information on most feasible and cost effective BMP’s.

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Hybrid Optical-Radio Transmission System Link Quality: Link Budget Analysis

Cited by 35 publications

References 33 publications

Free-space optical link optimization in visible light communication system

Free-space optical link optimization in visible light communication system

Outage Probability Analysis of Free Space Communication System Using Diversity Combining Techniques

Water Quality Modeling Using Soil and Water Assessment Tool: A Case Study of Rawal Watershed

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