Analisa Kinerja Teknik Modulasi Digital pada Kanal Optik Nirkabel
DOI:
https://doi.org/10.14203/jet.v17.7-12Keywords:
FSO, OOK, PPM, PSK, QAMAbstract
Transmisi optik nirkabel dengan kecepatan tinggi memiliki berbagai potensi untuk aplikasi jarak pendek terutama untuk komunikasi di dalam ruangan. Tulisan ini memaparkan perbandingan kinerja transmisi FSO menggunakan beberapa variasi skema modulasi. Pengamatan unjuk kinerja terutama dilakukan menggunakan bit error rate (BER). Gangguan turbulensi atmorferik menjadi bagian dari pemodelan kanal log normal yang digunakan dalam simulasi. Modulasi dasar spasial yang digunakan adalah on-off keying sebagai teknik klasik FSO, beserta pulse position modulation yang merupakan variasi spasialnya. Menelaah penggunaan modulasi baseband untuk sistem optik, disimulasikan PSK 2, 4, 8, 16, serta QAM 4 dan 16. Simulasi dengan data ukuran kecil menghasilkan bahwa BPSK dan 4 QAM menunjukkan unjuk kerja terbaik dengan BER rata-rata sekitar 10^-3 pada kondisi gangguan sedang sampai tinggi. Sementara tingkat error pada OOK dan PPM masih di atas 10^-0.5.
Downloads
References
B. Barua and D. Barua, “Evaluate the performance of FSO communication link with different modulation technique under turbulent condition,” in Proceedings of The 14th International Conference on Computer and Information Technology (ICCIT),2011, pp. 191-195. Crossref
Z. Ghassemlooy, W. Popoola, S. Rajbhandari, Optical Wireless Communications: System and Channel Modelling with MATLAB®, CRC Press, 2012.
R. Pernice, A. Anda, D. Musso, A. Parisi, L. Curcio, G. Adamo, S. Stivala, A.C. Busacca, “Optical turbulence measurements and channel modeling of an indoor free space optics link,” in Proceedings of Fotonica AEIT Italian Conference on Photonics Technologies, 2014, pp. 1-4. Crossref
R. Mesleh, H. Elgala and H. Haas, “An overview of indoor OFDM/DMT optical wireless communication systems,” in Proceedings of The 7th International Symposium on Communication Systems, Networks & Digital Signal Processing (CSNDSP 2010), 2010, pp. 566-570.
H.G. Olanrewaju, J. Thompson and W.O. Popoola, “Generalized spatial pulse position modulation for optical wireless communications,” in Proceedings of The 84th Vehicular Technology Conference (VTC-Fall), 2016, pp. 1-5. Crossref
H. Liu, R. Liao, Z. Wei, Z. Hou and Y. Qiao, “BER analysis of a hybrid modulation scheme based on PPM and MSK subcarrier intensity modulation,” in IEEE Photonics Journal, vol. 7, no. 4, pp. 1-10, Aug, 2015. Crossref
M. Z. Hassan, X. Song and J. Cheng, “Subcarrier intensity modulated wireless optical communications with rectangular QAM,” in IEEE/OSA Journal of Optical Communications and Networking, vol. 4, no. 6, pp. 522-532, June, 2012. Crossref
D. Astharini, T. Bastian, R. Mustika, O. N. Samijayani, R. Safitri, “Zero padding and cyclic prefix for OFDM on multipath rayleigh fading channel,” Journal of Mobile Multimedia, Vol. 11, no.3&4, pp. 330-338, 2015.
N. S. Paujia, D. Astharini, O. N. Samijayani, “SER and BER analysis using GNU radio for PSK and QAM modulation,” in Proceedings of International Seminars on Science, Technology and Innovations (ISSTIN), 2012, pp. 136-141.
C. Kachris, G. Tzimpragos, D. Soudris, I. Tomkos, “Reconfigurable FEC codes for software-defined optical transceivers,” in Proceedings of 13th International Conference on Optical Communications and Networks (ICOCN), 2014, pp.9-10. Crossref
R. Sahputra, D. Astharini, Faisal, “Low Density Parity Check code for OFDM transmission using bit flipping and sum product algorithm,” Advanced Science Letters, Vol. 23, no. 4, pp. 3754-3757, April, 2017. Crossref
A. Tunick, “Optical turbulence parameters characterized via optical measurements over a 2.33 km free-space laser path”, Optics Express, Vol. 16, no. 19, pp. 14645-14654, Sep, 2008. Crossref
R. Pernice, A. Andò, M. Cardinale, L. Curcio, S. Stivala, A. Parisi, A. C. Busacca, Z. Ghassemlooy, J. Perez, “Indoor free space optics link under the weak turbulence regime: measurements and model validation,” in IET Communications, vol. 9, no. 1, pp. 62-70, 2014 Crossref
Downloads
Published
Issue
Section
License
Authors who publish with this journal agree to the following terms:
The copyright to this article is transferred to BRIN if and when the article is accepted for publication. The undersigned hereby transfers any and all rights in and to the paper including without limitation all copyrights to BRIN. The undersigned hereby represents and warrants that the paper is original and that he/she is the author of the paper, except for material that is clearly identified as to its original source, with permission notices from the copyright owners where required. The undersigned represents that he/she has the power and authority to make and execute this assignment. The copyright transfer form can be downloaded here.
The corresponding author signs for and accepts responsibility for releasing this material on behalf of any and all co-authors. This agreement is to be signed by at least one of the authors who have obtained the assent of the co-author(s) where applicable. After submission of this agreement signed by the corresponding author, changes of authorship or in the order of the authors listed will not be accepted.
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
