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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Authors
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
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Abstract
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.
Keywords
Carrier to Noise Ratio (CNR), Direct Detection Receiver, Free Low Density Parity Check (LDPC)Code, Orthogonal Frequency Division Multiplexing (OFDM), Optical Wireless (OW) Communication System
To cite this article
Bobby Barua, 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. doi: 10.11648/j.awcn.20180402.13
Copyright
Copyright © 2018 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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