NDLI: Asymptotic bit-error rate analysis of quadrature amplitude modulation and phase-shift keying with OFDM RoFSO over M turbulence in the presence of pointing errors

Content Provider	IET Digital Library
Author	Krishnan, Prabu Jana, Utsav Ashokkumar, Balaji Kanekal
Abstract	In case where installation of optical fibre is not practically reliable, the new generation wireless communication popularised as free-space optics (FSO) systems can be used to transmit radio-frequency (RF) signals. FSO technology can efficiently transfer multiple RF signals, and this new technique is commonly referred as radio-on-FSO (RoFSO). The major challenges in this technology are atmospheric turbulence and pointing errors. In this study, the authors analysed the performance of RoFSO links employing the orthogonal frequency division multiplexing (OFDM) scheme under both modulation formats namely quadrature amplitude modulation and phase shift keying in the newly developed Málaga or M distribution turbulent channel model. The performance is evaluated with consideration of both scintillation and pointing errors in M distribution channel for higher values of the carrier-to-noise plus distortion ratio. M distribution channel serves as an effective generalised model which unifies all other available statistical channel models. The novel expressions of average bit-error rate has been derived and performance comparison has been done between the two modulation formats. This study identifies the crucial parameters that deteriorate the efficiency of the OFDM signal over FSO link which can be helpful in designing an optimal system.
Starting Page	2046
Ending Page	2051
Page Count	6
ISSN	17518628
Volume Number	12
e-ISSN	17518636
Issue Number	Issue 16, Oct (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/12/16
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2017.0560
Journal	IET Communications
Publisher Date	2018-06-14
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Asymptotic Bit-error Rate Analysis Atmospheric Turbulence Average Bit-error Rate Carrier-to-noise Plus Distortion Ratio Effective Generalised Model Error Statistics Free Space Optical Communication Free Space Optical Link Free-Space Optics System FSO Link FSO Technology M Distribution Channel M Distribution Turbulent Channel Model M Turbulence Modulation And Coding Method Modulation Formats Multiple RF Signal Málaga New Generation Wireless Communication OFDM Modulation OFDM RoFSO OFDM Signal Optical Link Optical Modulation Optimal System Orthogonal Frequency Division Multiplexing Scheme Performance Comparison Phase Shift Keying Phase-shift Keying Pointing Error Quadrature Amplitude Modulation Radio Over Fibre Radio-frequency Signal Radio-on-FSO RoFSO Link Scintillation Statistical Channel Model Statistics Wireless Channel
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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