Real Measurements and Evaluation of the Influence of Atmospheric Phenomena on FSO Combined with Modulation Formats
Journal Title: Elektronika - Year 2016, Vol 20, Issue 2
Abstract
The influence of atmospheric environment is fundamental for Free-Space Optical link (FSO). The atmosphere can significantly degrade the communication quality of FSO up to so low received power/RSSI level that it can lead to the loss of communication. For this reason, authors used a professional weather station built on site of FSO link for measurement of real atmospheric conditions such as wind speed, temperature, relative air humidity, air pressure and solar radiation. Random changing of these atmosphere parameters creates atmospheric turbulences, absorption and dispersion centers. It is necessary to specify the value of refractive index structure parameter Cn^2 because it determines the influence of atmosphere on the FSO. The first part of this article includes the theoretical calculation of Cn^2, there are used two models PAMELA and Macroscale Meteorological model. The evaluation of the atmospheric influences and the RSSI value of received power level and also simulation of different types of modulation formats OOK-RZ, OOK-NRZ and BPSK in Optiwave is integral part of this article.
Authors and Affiliations
Jan Latal, Lukas Hajek, Ales Vanderka, Petr Koudelka, Stanislav Hejduk
Keywords
Related Articles
- EP ID EP362461
- DOI 10.7251/ELS1620062L
- Views 60
- Downloads 0
Epilepsy Detecting and Halting Mechanism Using Wireless Sensor Networks
Epilepsy is a condition that affects thousands of people worldwide. In the laboratory setting, it becomes difficult to monitor patients and analyze when the next seizure would recur. Although algorithms have been propose...
Influence of Signal Stationarity on Digital Stochastic Measurement Implementation
The paper presents the influence of signal stationarity on digital stochastic measurement method implementation. The implementation method is based on stochastic voltage generators, analog adders, low resolution A/D conv...
Technology-Dependent Optimization of FIR Filters based on Carry-Save Multiplier and 4:2 Compressor unit
This work presents an FPGA implementation of FIR filter based on 4:2 compressor and CSA multiplier unit. The hardware realizations presented in this paper are based on the technology-dependent optimization of these indiv...
Cost Effective Implementation of Fixed Point Adders for LUT based FPGAs using Technology Dependent Optimizations
Modern day field programmable gate arrays (FPGAs) have very huge and versatile logic resources resulting in the migration of their application domain from prototype designing to low and medium volume production designing...
Prototype of the Multichannel Acquisition System Developed for ICTM Pressure Transmitters
This paper presents a prototype of the multichannel acquisition unit AKV-100 developed for purposes of pressure and temperature measurements using proprietary ICTM pressure transmitters TPa-110 based on MEMS piezoresisti...