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All Journal International Journal of Electrical and Computer Engineering Indonesian Journal of Electrical Engineering and Computer Science
Hasan, Omar
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Computer Science & IT Electrical & Electronics Engineering

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Time and wavelength diversity schemes for transdermal optical wireless links Almajdoubah, Rawan; Hasan, Omar
International Journal of Electrical and Computer Engineering (IJECE) Vol 14, No 6: December 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijece.v14i6.pp6423-6432

Abstract

Transdermal optical wireless communication systems have gained significant research and commercial attention in recent years. While using the skin as a transmission medium, the performance of such a system is influenced by the transdermal channel conditions between the transmitter and receiver. Indeed, for transdermal optical channel links, the performance of a linked communication system can be significantly affected by skin- induced attenuation and pointing errors. Extra attention has been given to diversity techniques to anticipate this. This research examines a conventional transdermal optical wireless system by analyzing the outage probability, an important performance parameter that has not been previously evaluated for such systems using the same method. In an examination of outage probability, both skin-induced attenuation and stochastic spatial jitter, also referred to as pointing error effects, are included. The usefulness of this topic is demonstrated using analytical formulas and results that determine the probability of system outage under various skin channel conditions and varying levels of stochastic pointing faults. Simulation model using Monte- Carlo simulation method was conducted using MATLAB to validate our suggestions. The simulation results showed a good agreement with numerical results, which proved the effectiveness of using wavelength and time diversity schemes to enhance transdermal optical wireless based systems.
Performance evaluation of transdermal optical wireless communication using spatial diversity techniques Almajdoubah, Rawan; Hasan, Omar
Indonesian Journal of Electrical Engineering and Computer Science Vol 38, No 2: May 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v38.i2.pp865-875

Abstract

Active medical implants and other contemporary medical applications need a dependable, high-speed communication channel between external and internal transceivers. Optical wireless communications have demonstrated advantages over widely used radio frequency technology in terms of data speeds, bandwidth abundance, and immunity to interference. Regretfully, this advantage implies strict alignment requirements for both sending and receiving ends. This study focuses on the effects of using multiple transmitters or receivers under the influence of pointing error on the transcutaneous link's overall performance measured by the outage probability and outage rate. Spatial diversity techniques have demonstrated their viability in increasing the link's reliability in free space optical communications. This drives the investigation of improvement transdermal communication system by adding numerous transmitters or receivers. Various misalignment severities are used to represent different operating circumstances, and these analyses result in explicit closed-form formulas for the relevant metrics. The findings clearly show the benefits of employing multiple transmitters and receivers on the link's outage performances. A notable improvement in the average signal-to-noise ratio values for the outage probability and outage rate compared to the single input single output setup was achieved. Furthermore, the theoretical conclusions are subsequently confirmed by MATLAB-based Monte-Carlo simulation for several instructive cases.
Co-Authors Almajdoubah, Rawan