Abstract
The requirement of high data rate information transmission is rising exponentially for supporting different services including social networking, web streaming, and biomedical sensor data transmission. Such services required high channel bandwidth with secure information transmission and immunity to electromagnetic interference. Radio over free space optics (RoFSO) is witnessed as a promising technological solution to provide high data rate transmission over free space channel. We report on the design of a 2×10 Gb/s-10 GHz RoFSO transmission system using the mode division multiplexing technique and evaluate its transmission performance over varying levels of dust weather conditions. The comparison of non-return to zero (NRZ) and return to zero (RZ) binary digital optical modulation techniques is carried out in the proposed system. It is found that the proposed system using NRZ modulation serves 14.5 km transmission range; however, in the case of RZ modulation, it was restricted to 10 km for a target bit error rate (BER) of 10−6, thus resulting in a noticeable link enhancement of 4.5 km. Also, we demonstrate NRZ-based MDM-RoFSO link performance and availability in dust weather conditions using the BER, maximum reachable link range, and eye diagram as key performance parameters. We obtain a reliable transmission of 20 Gb/s-20 GHz data through HG00 and HG01 channels over a link range of 2500–108 m depending on the external dust weather condition. Furthermore, since this investigation shows the feasibility of RoFSO for small size cells, which is an essential feature of 5G mobile network, the proposed system can thus be implemented as a backhaul/fronthaul link for high-band (above 6 GHz) 5G services and for providing secure transmission of biomedical sensor data.
Highlights
In the present-day telecommunications sector, the base transceiver station (BTS)-BTS connection is established through fiber optic trunk cables in which voice/data are transmitted at high speed using radio over fiber (RoF) technology
We compare the performance of non-return to zero (NRZ) and return to zero (RZ) modulationbased mode division multiplexing (MDM)-radio over free space optics (RoFSO) link under a clear climate
RoFSO transmission systems integrated with MDM technology can provide a viable solution for providing secure biomedical sensor data transmission in medical facilities
Summary
In the present-day telecommunications sector, the base transceiver station (BTS)-BTS connection is established through fiber optic trunk cables in which voice/data are transmitted at high speed using radio over fiber (RoF) technology. Alaa et al analyzed the FSO system performance in fog and sandstorm conditions by changing the operating wavelength, receiver diameter aperture, photodetector type, and the modulation technique They found that both the dense fog and dust triggered 87 and 95% power loss, respectively, at a transmission range of 1 km [8]. The second approach used in the literature for the calculation of attenuation in FSO for real-world applications rests on experimental remark [22] This technique is based on experiential models established by means of visibility range statistics to identify the propagation path characteristics [23].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
