Hybrid optical CDMA-FSO communications network under spatially correlated gamma-gamma scintillation

Jurado-Navas, Antonio; Raddo, Thiago R.; Garrido-Balsells, José María; Borges, Ben‐Hur V.; Olmos, Juan José Vegas; Monroy, Idelfonso Tafur

doi:10.1364/oe.24.016799

Cited by 35 publications

(28 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Besides the TDM and WDM the utilization of the advanced technologies such as optical code-division multiple-access (OCDMA) in PON are considered to be an efficient solution for the access networks there lowbandwidth services are expected to coexist with the broadband networking applications [9], [10], [26]. Consequently, the utilization of OCDMA in PON for 5G applications can be considered as a possible direction for future research.…”

Section: Technologies Integrationmentioning

confidence: 99%

The Integration of 5G, PON and VLC Technologies for Ubiquitous Connectivity in Autonomous and Cooperative Systems

Kurbatska

Braunfelds

Bobrovs

et al. 2019

2019 IEEE 2nd 5G World Forum (5GWF)

View full text Add to dashboard Cite

DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal. If the publication is distributed under the terms of Article 25fa of the Dutch Copyright Act, indicated by the "Taverne" license above, please follow below link for the End User Agreement:

show abstract

Section: Technologies Integrationmentioning

confidence: 99%

The Integration of 5G, PON and VLC Technologies for Ubiquitous Connectivity in Autonomous and Cooperative Systems

Kurbatska

Braunfelds

Bobrovs

et al. 2019

2019 IEEE 2nd 5G World Forum (5GWF)

View full text Add to dashboard Cite

show abstract

“…because of its high diversity gain, which can effectively counter the effects of multipath fading and is accessible to implement [8]. Aperture averaging and spatial diversity techniques are used to improve the error probability of atmospheric system [9], [10].…”

Section: Introductionmentioning

confidence: 99%

10Gb/s Two-User Spatial Diversity FSO-CDMA Wiretap Channel Based on Reconfigurable Optical Encoder/Decoders

Zheng

Peng

et al. 2020

IEEE Access

View full text Add to dashboard Cite

Due to the effect of atmospheric turbulence, the transmission reliability and physical-layer security of free space optical (FSO) communication system are facing many challenges. In this paper, for the first time, we design and investigate a 10 Gb/s reconfigurable FSO wiretap channel based on spatial diversity and optical code division multiple access (OCDMA). Reconfigurable two-dimensional optical encoder and decoder are constructed by wavelength selective switch and optical delay lines, and reconfigurable onedimensional optical encoder and decoder are constructed by couplers and tunable optical delay lines. Under three different turbulence conditions, bit error rates (BER) of legitimate user and eavesdropper are measured. It can be seen that under turbulence effects, BER of legitimate user in spatial-diversity is lower than that of non-diversity system. By the rapid code reconfiguration of legitimate users, the eavesdropper can only use unmatched decoder. Thus, the eavesdropping methods of code interception and brute-force searching can be avoided. Experimental results show that this scheme can ensure the reliable transmission of legitimate users, and the eavesdropper can't crack the information when the extraction ratio is 1%. Hence, reliability and physical-layer security can be enhanced simultaneously.INDEX TERMS Free space optical communication, optical code division multiple access, spatial diversity, atmospheric turbulence.

show abstract

“…Diversity techniques used in FSO communications include time-diversity, frequency-diversity and spatial diversity. In [3], a spatial diversity reception with multiple receivers is proposed. It can reduce the influence of atmospheric turbulence effectively.…”

Section: Introductionmentioning

confidence: 99%

Design and Investigation of 10 Gb/s FSO Wiretap Channel Using OCDMA Time-Diversity Reception

Zhang

et al. 2020

IEEE Photonics J.

View full text Add to dashboard Cite

In this paper, 10 Gb/s free space optical (FSO) wiretap channel using optical code division multiple access (OCDMA) time-diversity reception is designed and demonstrated for the first time. Reliability and security are investigated under weak and strong turbulence conditions. Two-dimensional optical encoder and decoder are constructed by wavelength selective switches and optical delay lines, and one-dimensional optical encoder and decoder are constructed by couplers and tunable optical delay lines. Experimental results show that reliability and security can be enhanced simultaneously using OCDMA time-diversity reception. At the received power of 2.58 dBm in strong turbulence, compared to non-diversity system, bit error rate (BER) of legitimate user in OCDMA time-diversity system is reduced from 3.9 × 10 −7 to 6.73 × 10 −8. Furthermore, the reliability improvement is more obvious when the correlation between the two signals of OCDMA time-diversity is smaller. The secrecy capacity can be increased from 0.546 bit/symbol to 0.665 bit/symbol in strong turbulence when received power is 2.28 dBm. On the other hand, the secrecy capacity of strong turbulence is about 15% higher than that of weak turbulence.

show abstract

Hybrid optical CDMA-FSO communications network under spatially correlated gamma-gamma scintillation

Cited by 35 publications

References 35 publications

The Integration of 5G, PON and VLC Technologies for Ubiquitous Connectivity in Autonomous and Cooperative Systems

The Integration of 5G, PON and VLC Technologies for Ubiquitous Connectivity in Autonomous and Cooperative Systems

10Gb/s Two-User Spatial Diversity FSO-CDMA Wiretap Channel Based on Reconfigurable Optical Encoder/Decoders

Design and Investigation of 10 Gb/s FSO Wiretap Channel Using OCDMA Time-Diversity Reception

Contact Info

Product

Resources

About