BER Performance Analysis of an LDPC Coded OFDM Optical Wireless Communication System with Intensity Modulation and a Direct Detection Receiver
Advances in Wireless Communications and Networks
Volume 4, Issue 2, December 2018, Pages: 43-48
Received: Dec. 10, 2018;
Accepted: Dec. 25, 2018;
Published: Jan. 18, 2019
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Bobby Barua, Department of EEE, Ahsanullah University of Science and Technology, Dhaka, Bangladesh
Satya Prasad Majumder, Department of EEE, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh
Optical wireless (OW) that is also known as free space optical (FSO) communication system are impaired by adverse weather conditions, such as rain, fog, cloud, snow and atmospheric turbulences. To reduce the destructive effect of atmospheric turbulence, OFDM technique itself have already been reported in several publications which is not sufficient to improve the performance. So channel coding with OFDM in OW havebeen proposed in literature. LDPC-coded OFDM enhances the immunity to the atmospheric turbulence in optical wireless communication systems. In this paper we provide a logical way to evaluate the exhibitions of LDPC coded OFDM OW correspondence framework with the impact of solid air disturbance. The scientific perception demonstrates that the framework endures penalty due to atmospheric turbulence and the degradations of BER are evaluated for several values of system parameters like number of OFDM subcarriers, code word length, interface separate, information rate and quality of the disturbance which is spoken to through refractive list structure parameter. Examination likewise demonstrates that the framework exhibitions enhances due to LDPC code and the coding addition of the LDPC coded OFDM framework with 64 sub-bearers are investigated. It is seen that LDPC coded OFDM OW framework gives 12 to 15 dB improvements over uncoded OFDM OW frame work at a BER of 10-9.
Satya Prasad Majumder,
BER Performance Analysis of an LDPC Coded OFDM Optical Wireless Communication System with Intensity Modulation and a Direct Detection Receiver, Advances in Wireless Communications and Networks.
Vol. 4, No. 2,
2018, pp. 43-48.
M. N. O. Sadiku and S. M.Musa, “Free Space Optical Communications: An Overview” European Scientific Journal vol. 12, no. 9 pp-55-68, 2016.
H. Kaushal Viswanath, , V. K. Jain and S. Kar, “Evaluation of performance of ground to satellite free space optical link under turbulence conditions for different intensity modulation schemes,” Proc. SPIE, Free Space Laser Comm. and Atmosph. Prop. (XXVI), vol. 8971, 2014.
W.O. Popoola and Z. Ghassemlooy, “BPSK subcarrier intensity modulated free-space optical communications in atmospheric turbulence” J. Light wave Technology, pp. 967–973, 2009.
B. Barua and S. P. Majumder, “Analytical Performance Evaluation of a Multiple Subcarrier Modulated FSO Communication System with Coherent Optical Receiver under Strong Atmospheric Turbulence” 2017 IEEE International Conference on Telecommunications and Photonics (ICTP), Dhaka, Bangladesh , 2017.
X. Tang, S. Rajbhandari, W. O. Popoola, Z. Ghassemlooy, S. S. Muhammad, E. Leitgeb and G. Kandus, “Performance of BPSK Subcarrier Intensity modulation Free-space optical communications using a Lognormal Atmospheric Turbulence Model” IEEE Conference , pp. 17 - 20, 2010.
B. Barua and S. P. Majumder, “Performance Analysis of a Multiple Subcarrier Modulated FSO Communication System using Direct Detection Optical Receiver under the Effect of Weak Atmospheric Turbulence,”J. Opt. Communications 2 1-9, 2018.
Armstrong, “OFDM for optical communications,” IEEE/OSA Journal of Lightwave Technology, vol. 27, no. 3, pp. 189-204, 2009.
Bekkali, C. B. Naila, K. Kazaura, K. Wakamori and M. Matsumoto, “Transmission analysis of OFDM based wireless services over turbulent radio-on-FSO links modeled by Gamma⁃Gamma distribution,” IEEE Photonics Journal, vol. 2, no. 3, pp. 509-520, 2010.
S. Zhao, X. Ma, X. Zhang and B. Bai, “A class of non binary LDPC codes with fast encoding and decoding algorithms,” IEEE Trans. Commun., vol. 61, no. 1, pp. 1–6, 2013.
B. Djordjevic, B. Vasic and M. A. Neifeld, “LDPC coded OFDM over the atmospheric turbulence channel,” Optics Express, vol. 15, no. 10, pp. 6337-6350, 2007.
X. Liu, P. Wang, T. Liu, Y. Li, L. Guo and H. Tian, “ABER Performance of LDPC-Coded OFDM Free-Space Optical Communication System Over Exponentiated Weibull Fading Channels With Pointing Errors”, IEEE Photonics Journal, vol. 9, no. 4, pp. 1-14, 2017.
E. T. Scharlemann, E. F. Breitfeller, J. R. Henderson, J. S. Kallman, J. R. Morris andA. J. Ruggiero, “Modeling of long-range atmospheric laser com links between static and mobile platforms,” in SPIE's 48th Annual Meeting Optical Science and Technology, pp. 272-279, 2004.
M. A. Kashani, M. Uysal and M. Kavehrad, “An ovel statistical channel model of turbulence Induced fading in free space optical systems,” IEEE/OSA Journal of Lightwave Technology, vol. 33, no. 11, 2303-2312, 2015.
J. Navas, G. Balsells, J. M. Paris and J. F. A. Puerta Notario, “A unifying statistical model for atmospheric optical scintillation,” invited chapter in Numerical Simulations of Physical and Engineering Processes. Rijeka, 2011.
R. Barrios and F. Dios, “Exponentiated Weibull model for the irradiance probability density function of a laser beam propagating through atmospheric turbulence,” Optics & Laser Technology, vol. 45, no. 12, 13-20, 2013.