scholarly journals On Physical-Layer Security in Multiuser Visible Light Communication Systems With Non-Orthogonal Multiple Access

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 34004-34017 ◽  
Author(s):  
Xiang Zhao ◽  
Hongbin Chen ◽  
Jinyong Sun
Keyword(s):  
Visible Light ◽  
Physical Layer Security ◽  
Communication Systems ◽  
Multiple Access ◽  
Visible Light Communication ◽  
Physical Layer

scholarly journals Physical Layer Security for Visible Light Communication Systems: A Survey

2020 ◽  
Vol 22 (3) ◽  
pp. 1887-1908 ◽  
Author(s):  
Mohamed Amine Arfaoui ◽  
Mohammad Dehghani Soltani ◽  
Iman Tavakkolnia ◽  
Ali Ghrayeb ◽  
Majid Safari ◽  
...  
Keyword(s):  
Visible Light ◽  
Physical Layer Security ◽  
Communication Systems ◽  
Visible Light Communication ◽  
Physical Layer

scholarly journals Doubly Orthogonal Wavelet Packets for Multi-Users Indoor Visible Light Communication Systems

Photonics ◽  
2019 ◽  
Vol 6 (3) ◽  
pp. 85 ◽  
Author(s):  
Arslan Khalid ◽  
Hafiz Muhammad Asif ◽  
Konstantin I. Kostromitin ◽  
Sattam Al-Otaibi ◽  
Kazi Mohammed Saidul Huq ◽  
...  
Keyword(s):  
Visible Light ◽  
Communication Systems ◽  
Multiple Access ◽  
Visible Light Communication ◽  
Wavelet Packets ◽  
Easy Access ◽  
Line Of Sight ◽  
Detection Scheme ◽  
Time Frequency ◽  
Code Division Multiple

Visible Light Communication (VLC) is a data communication technology that modulates the intensity of the light to transmit the information mostly by means of Light Emitting Diodes (LEDs). The data rate is mainly throttled by the limited bandwidth of the LEDs. To combat, Multi-carrier Code Division Multiple Access (MC-CDMA) is a favorable technique for achieving higher data rates along with reduced Inter-Symbol Interference (ISI) and easy access to multi-users at the cost of slightly reduced compromised spectral efficiency and Multiple Access Interference (MAI). In this article, a multi-user VLC system is designed using a Discrete Wavelet Transform (DWT) that eradicates the use of cyclic prefix due to the good orthogonality and time-frequency localization properties of wavelets. Moreover, the design also comprises suitable signature codes, which are generated by employing double orthogonality depending upon Walsh codes and Wavelet Packets. The proposed multi-user system is simulated in MATLAB software and its overall performance is assessed using line-of-sight (LoS) and non-line-of-sight (NLoS) configurations. Furthermore, two sub-optimum multi-users detection schemes such as zero forcing (ZF) and minimum-mean-square-error (MMSE) are also used at the receiver. The simulated results illustrate that the doubly orthogonal signature waveform-based DWT-MC-CDMA with MMSE detection scheme outperforms the Walsh code-based multi-user system.

scholarly journals Optimization of Non-Orthogonal Multiple Access Based Visible Light Communication Systems

2019 ◽  
Vol 23 (8) ◽  
pp. 1365-1368 ◽  
Author(s):  
Zanib Tahira ◽  
Hafiz M. Asif ◽  
Asim Ali Khan ◽  
Sobia Baig ◽  
Shahid Mumtaz ◽  
...  
Keyword(s):  
Visible Light ◽  
Communication Systems ◽  
Multiple Access ◽  
Visible Light Communication
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