Channel capacity optimization for an integrated wi-fi and free-space optic communication system (WiFiFO)

AbstractThis work aims to investigate the integrated ultra-dense wavelength division multiplexing (UDWDM) and polarization division multiplexing (PDM) schemes incorporated in the free space optic (FSO) communication system. Erbium-doped fiber amplifiers (EDFAs) are used as post and pre-amplifiers in the proposed UDWDM–PDM–FSO system to boost the transmission power for increasing the distance. Thirty-two channels are transported over the FSO link to realize the total data transmission of 160 and 320 Gbps with 0.08 and 0.1 nm channel spacing, respectively. Results are also reported with non-return to zero modulation schemes. The performance of the proposed UDWDM–PDM–FSO transmission system is measured in terms of bit error rate (BER) and eye diagrams. The transmission distances are 100 and 87 km under clear weather and have acceptable BERs with 0.08 and 0.1 nm channel spacing, respectively. The weather conditions may worsen due to the increase in atmospheric turbulence. Hence, the transmission distances decrease to 3.93 and 2.6 km for heavy rain weather conditions. The UDWDM–PDM–FSO communication system exhibits an excellent performance due to the use of EDFAs with high achievable maximum distance and good and acceptable BER performance. The UDWDM–PDM–FSO communication system considerably enhances the transmission distance compared with the UDWDM–FSO communication system.

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Design, Simulation and Testing of the OOK NRZ Modulation Format for Free Space Optic Communication in a Simulation Box

Advances in Electrical and Electronic Engineering ◽

10.15598/aeee.v12i6.1255 ◽

2015 ◽

Vol 12 (6) ◽

Cited By ~ 2

Author(s):

Ales Vanderka ◽

Lukas Hajek ◽

Jan Latal ◽

Jan Vitasek ◽

Petr Koudelka

Keyword(s):

Free Space ◽

Modulation Format ◽

Free Space Optic ◽

Optic Communication

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Design and Analysis of 1.28 Terabit/s DWDM Transmission System for Free Space Optical Communication

10.21203/rs.3.rs-460317/v2 ◽

2021 ◽

Author(s):

Ebrahim E. Elsayed

Keyword(s):

Wavelength Division Multiplexing ◽

Communication System ◽

Free Space ◽

High Capacity ◽

Free Space Optical ◽

Atmospheric Effect ◽

Eye Diagram ◽

Wavelength Division ◽

Wavelength Division Multiplexed ◽

Free Space Optic

Abstract In this paper, the implementation of a dense wavelength division multiplexing (DWDM) 32 × 40 Gbps (1.28 Tera bit/s) for the free-space optical (FSO) communication system is investigated. Analysis is performed for return-to-zero (RZ) and non-return-to-zero (NRZ) line codes for 1 km free space optic length. Motivation to the current analysis is to compare RZ and NRZ lines codes in the DWDM-FSO communication system and it is found that the NRZ line code is better than RZ code. A 1.28 Tb/ps wavelength division multiplexed communication system for free space optic channel workplace has been discovered in which 32 channel each of 40 Gbps data streams are combined using wavelength division multiplexed. The study includes the attenuation caused by atmospheric effect and beam divergence. Bit-error rate (BER), quality factor (Q), and eye diagram are indicator of performance evaluation. By comparing one can get a promising system to the high capacity access network with more bandwidth, cost effective and good flexibility.

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