Multiplexed terrestrial free space optic system design using dual polarized multicarrier transmission technique

2020 ◽  
Vol 59 (02) ◽  
pp. 1
Author(s):  
Jagana Bihari Padhy ◽  
Bijayananda Patnaik
Keyword(s):  
System Design ◽  
Free Space ◽  
Optic System ◽  
Multicarrier Transmission ◽  
Transmission Technique ◽  
Free Space Optic ◽  
Dual Polarized

CO-OFDM and DP-QPSK Based DWDM Optical Wireless Communication System

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
Jagana Bihari Padhy ◽  
Bijayananda Patnaik
Keyword(s):  
Orthogonal Frequency Division Multiplexing ◽  
Channel Model ◽  
Spectrum Efficiency ◽  
Optical Wireless ◽  
Multicarrier Transmission ◽  
Transmission Technique ◽  
Turbulence Regime ◽  
Dual Polarized ◽  
Dwdm System ◽  
Clear Weather

Abstract The 5 G technology provides a promising solution for future broadband networks. It requires access to high-speed wireless services for systems at anytime and anywhere. For adapting the 5 G services, this paper proposes an optical wireless system with hybrid scheme of dual polarized Gbps dense wavelength division multiplexed (DWDM) system. The multi-carrier transmission technique such as coherent optical orthogonal frequency division multiplexing (CO-OFDM) has also been incorporated into the system. The frequency spacing for the DWDM system is taken 25, 50 and 100 GHz according to the ITU-T standard. Here the subcarriers of each channel are modulated with the dual polarized-quadrature phase shift keying (DP-QPSK) sequence. The information is transmitted with an overall data rate of 0.32 Tbps. The system is successfully demonstrated at different turbulence regime from clear weather to severe turbulence weather under Gamma-Gamma atmospheric turbulence channel model. Due to the high optical signal-to-noise ratio (OSNR) tolerance and high spectrum efficiency of the dual polarized multi-channel and multicarrier transmission technique, the link distance achieved is 2.9 km in clear weather, 2.6 km in moderate turbulence regime, 2.3 km in high turbulence regime and 0.9 km in severe turbulence regime. A comparison study with related works has been carried out. Mathematical modeling is also incorporated for detail analysis of the proposed system.

scholarly journals Adaptive free space optic system based on visibility detector to overcome atmospheric attenuation

2019 ◽  
Vol 14 ◽  
pp. 102392 ◽  
Author(s):  
Muhammad K. El-Nayal ◽  
Mohamed M. Aly ◽  
Heba A. Fayed ◽  
Roshdy A. AbdelRassoul
Keyword(s):  
Free Space ◽  
Atmospheric Attenuation ◽  
Optic System ◽  
Free Space Optic

Project of Radio on Free Space Optic System Development for Heterogeneous Wireless Services

2008 ◽  
Author(s):  
Katsutoshi Tsukamoto ◽  
Hideaki Onodera ◽  
Kyung-Hwan Kim ◽  
Takuya Nakamura ◽  
Takeshi Higashino ◽  
...  
Keyword(s):  
Free Space ◽  
System Development ◽  
Optic System ◽  
Wireless Services ◽  
Free Space Optic

Terrestrial Free Space Optic Propagation Analysis Considering Malaysia Weather Condition

2012 ◽  
Author(s):  
Wan Rizal Hazman Wan Ruslan ◽  
Sevia Mahdaliza Idrus ◽  
Arnidza Ramli ◽  
Norhafizah Ramli ◽  
Abu Sahmah Mohd Supa’at ◽  
...  
Keyword(s):  
Bit Error Rate ◽  
Error Rate ◽  
Free Space ◽  
Weather Condition ◽  
Q Factor ◽  
Performance Characterization ◽  
Space Optics ◽  
Terrestrial System ◽  
Data Rates ◽  
Free Space Optic

Pemantulan cahaya matahari oleh cermin atau dikenali sebagai heliograf adalah kaedah awal komunikasi optik wayarles (OWC). Sewajarnya, sistem komunikasi moden mendedahkan kadar data yang tinggi di samping kualiti perkhidmatan yang lebih baik berbanding kaedah terdahulu. Sistem komunikasi optic wayarles mempunyai banyak kebaikan dimana ia adalah penting untuk sistem daratan, sebagai contoh penggunaan Optik Ruang Bebas (FSO) di kawasan luar. Di dalam kertas kerja ini, gambaran dan pencirian prestasi sistem Optik Ruang Bebas seperti pelemahan, kadar bit kesalahan (BER), faktor Q dan jenis pengesan yang berguna untuk pengesanan dalam sistem FSO dibentangkan. Sistem telah direkabentuk dan disimulasi untuk perincian prestasi dengan mengambil kira kawasan Subang. Kata kunci: Pelemahan; kadar bit kesalahan; pengesan foto; faktor Q; sistem daratan The reflection of sunlight by mirrors or known as the heliograph is an early method of optical wireless communication (OWC). Naturally, modern communication system reveals much higher data rates with better quality of service (QoS) compared to those ancient methods. There are many advantages of OWC which are important for a terrestrial system for example the usage of an outdoor free space optics (FSO) system. In this paper, a description and system performance characterization of the FSO such as attenuation, bit error rate (BER), Q factor and the type of detectors that are highly useful for detection in FSO systems are presented. The system are designed and simulated for performance characterization considering Subang terrestrial. Key words: bit error rate; photodetector; Q factor; terrestrial system

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