Quality Factor and SNR Compensation of Free Space Optical Communication Link Using Different Modulators

  • Authors

    • Ali Hammadi Middle Technical University Electrical Engineering Technical College Department of Control and Automation
    • Ali Al-Askery Middle Technical University Electrical Engineering Technical College Department of Control and Automation
    • Entidhar Zghair Middle Technical University Technical Instructors Training Institute
    2018-11-30
    https://doi.org/10.14419/ijet.v7i4.19109
  • Electro-absorption modulator, Free space optical systems, Mach-Zehnder modulator

  • Free space optical (FSO) systems introduce the best solution for the broadband network requirements with a cost reduction compared to the optical wire communication systems. This paper studies the signal to noise ratio (SNR) and quality factor (Q-factor) for using two types of modulation formats and compares their performance. The analysis are performed for Mach-Zehnder modulator (MZM) and electro-absorption modulator (EAM) with distance range (1-4) km of FSO by using avalanche photo-diodes (APD) receivers. The simulation results are obtained based on the Optisystem 7.0 with optical high data rate of 10 Gbs for this communication system. The simulation results have shown that MZM gives better performance compared to EAM for different ranges and for the selected beam divergence value.

  • References

    1. [1] J. Singh and N. Kumar, “Performance analysis of different modulation format on free space optical communication system,†Optik-International journal for light and electron optics, vol. 124, no. 20, pp. 4651–4654, 2013.

      [2] L. Yang, X. Gao, and M.-S. Alouini, “Performance analysis of freespace optical communication systems with multiuser diversity over atmospheric turbulence channels,†IEEE Photonics Journal, vol. 6, no. 2, pp. 1–17, 2014.

      [3] R. Roy and J. S. Babu, “Simulation and performance analysis of free space optical systems using multiple Tx/Rx and polarized CO-OFDM techniques under atmospheric disturbances,†International Journal of Engineering Research and General Science, vol. 3, no. 1, pp. 743–749, 2015.

      [4] G. Soni and J. Malhotra, “Free space optics system: performance and link availability,†International journal of computing and corporate research, vol. 1, no. 3, p. 24, 2011.

      [5] N. H. M. Noor, A. W. Naji, and W. Al-Khateeb, “Performance analysis of a free space optics link with multiple transmitters/receivers,†IIUM Engineering Journal, vol. 13, no. 1, 2012.

      [6] D. Neha and S. Kumar, “Role of modulators in free space optical communication,†International Journal of Engineering Technology, Management and Applied Sciences, vol. 4, no. 9, pp. 92–96, 2016.

      [7] P. Arora, S. Kumar, and D. Sharma, “Performance analysis of NRZ and RZ modulation schemes in optical fiber link using EDFA,†International Journal of Computer Science and Software Engineering, vol. 7, no. 8, pp. 161–168, 2017.

      [8] S. Khare and N. Sahayam, “Analysis of free space optical communication system for different atmospheric conditions & modulation techniques,†2012.

      [9] D. D. Coleman and D. A. Westcott, Cwna: certified wireless network administrator official study guide: exam Pw0-105. John Wiley & Sons, 2012.

      [10] I. Recommendation, “Prediction methods required for the design of terrestrial free-space optical links,†International telecommunication Union, p. 1814, 2007.

      [11] F. Nadeem, V. Kvicera, M. S. Awan, E. Leitgeb, S. S. Muhammad, and G. Kandus, “Weather effects on hybrid FSO/RF communication link,†IEEE journal on selected areas in communications, vol. 27, no. 9, 2009.

      [12] H. A. Fadhil, A. Amphawan, H. A. Shamsuddin, T. H. Abd, H. M. Al-Khafaji, S. Aljunid, and N. Ahmed, “Optimization of free space optics parameters: An optimum solution for bad weather conditions,†Optik-International Journal for Light and Electron Optics, vol. 124, no. 19, pp. 3969–3973, 2013.

      [13] S. S. Muhammad, P. Kohldorfer, and E. Leitgeb, “Channel modeling for terrestrial free space optical links,†in Transparent Optical Networks, 2005, Proceedings of 2005 7th International Conference, vol. 1. IEEE, 2005, pp. 407–410.

      [14] H. Kaur and G. Soni, “Performance analysis of free space optical communication link using different modulation and wavelength,†Journal of scientific research & reports, vol. 6, no. 3, pp. 201–209, 2015.

      [15] P. Sharma and H. Sarangal, “Performance comparison of APD and PIN photodiodes using different modulation and different wavelengths,†International Journal of Signal Processing, Image Processing and Pattern Recognition, vol. 9, no. 4, pp. 257–264, 2016.

  • Downloads

  • How to Cite

    Hammadi, A., Al-Askery, A., & Zghair, E. (2018). Quality Factor and SNR Compensation of Free Space Optical Communication Link Using Different Modulators. International Journal of Engineering & Technology, 7(4), 3747-3751. https://doi.org/10.14419/ijet.v7i4.19109