Proceedings ArticleDOI
BER of an optically pre-amplified FSO system under Málaga turbulence, pointing errors, and ASE noise
Prakriti Saxena,Aashish Mathur,Manav R. Bhatnagar,Zabih Ghassemlooy +3 more
- pp 1-6
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TLDR
The bit error rate (BER) performance of a FSO system assuming non-return-to-zero on-off keying modulation in the presence of ASE noise under M-turbulence and PEs is evaluated.Abstract:
The performance of a free space optical (FSO) communication system is significantly affected by atmospheric turbulence and pointing errors (PEs) apart from the additive noise which is assumed to be Gaussian. The Malaga or M-distribution encompasses various proposed statistical models for atmospheric turbulence in FSO systems. An optical pre-amplifier is an essential component of FSO systems for improving the receiver (Rx) sensitivity. However, optical pre-amplification results in amplified spontaneous emissions (ASE), which dominate the Rx thermal and shot noises. The square law photodetection process at the Rx in a FSO system necessitates the consideration of Chi-square statistics for the decision variable contrary to the Gaussian approximation that is widely used in the literature. In this paper, we evaluate the bit error rate (BER) performance of a FSO system assuming non-return-to-zero on-off keying modulation in the presence of ASE noise under M-turbulence and PEs. We also derive asymptotic BER expressions for the considered FSO system for large values of signal-to-noise ratio in terms of simple elementary functions. A further insight into the system is provided by performing the diversity analysis.read more
Citations
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Journal ArticleDOI
Physical Layer Security of Hybrid Satellite-FSO Cooperative Systems
TL;DR: The physical layer secrecy performance of a hybrid satellite and free-space optical (FSO) cooperative system is studied and it is found that with the AF with fixed gain scheme, the secrecy diversity order of the investigated system is only dependent on the channel characteristics of the FSO link and theFSO detection type, whereas the secrecy Diversity is zero when the relay node employs DF or AF with variable-gain schemes.
Journal ArticleDOI
Secrecy performance of FSO communication systems with non-zero boresight pointing errors
Journal ArticleDOI
Experimental and Analytical Investigations of an Optically Pre-Amplified FSO-MIMO System With Repetition Coding Over Non-Identically Distributed Correlated Channels
TL;DR: It is shown analytically that, both correlation and pre-amplification do not affect the diversity order of the system, however, both factors have contrasting behaviour with respect to coding gain.
Journal ArticleDOI
Atmospheric Laser Communication Technology Based on Detector Gain Factor Regulation Control
TL;DR: Based on the working principle of the photoelectric detector in atmospheric turbulence, an optical communication receiving system based on the detector gain factor regulation control is designed, which calculates the scintillation variance according to the received signal in real-time, establishes the function conversion relationship between the SCI variance and the gain factor, realizes the closed-loop regulation control of the detector, and improves the SNR of the receiving system as discussed by the authors.
References
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Proceedings ArticleDOI
Signal dependent Gaussian noise model for FSO communications
TL;DR: The use of ON-OFF keying (OOK) is investigated which shows a good performance in terms of achieving optical power gains and the analysis of the FSO optimum/sub-optimum detectors is provided.
Proceedings ArticleDOI
Free Space Optical MIMO System Using PPM Modulation and a Single Optical Amplifier
TL;DR: Binary pulse position modulation (PPM) is proposed and analyzed in the presence of background radiation and amplified spontaneous emission noise and results in significantly better performance than using an electrical amplifier.
Proceedings ArticleDOI
Performance of Optically Pre-Amplified FSO System under Gamma-Gamma Turbulence with Pointing Errors and ASE Noise
TL;DR: This paper evaluates the bit error rate (BER) performance of a FSO system assuming non-return-to-zero on-off keying modulation in the presence of ASE noise under Gamma-Gamma ($\Gamma \Gamma$) AT and PEs and derives an expression of asymptotic BER for the considered FSOSystem for large values of signal- to-noise ratio in terms of simple elementary functions.