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
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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Journal ArticleDOI
Performance evaluation of EDFA preamplified receivers taking into account intersymbol interference
TL;DR: In this paper, an exact mathematical derivation of the moment generating function for an optically preamplified receiver output current was carried out, which enables analytical assessment of the overall receiver performance without restrictions on the optical input pulse and the electronic filter response.
Posted Content
A Unifying Statistical Model for Atmospheric Optical Scintillation
TL;DR: In this paper, a new statistical model for the irradiance fluctuations of an unbounded optical wavefront (plane and spherical waves) propagating through a turbulent medium under all irradiance fluctuation conditions in homogeneous, isotropic turbulence was developed.
Journal ArticleDOI
Improved bit error rate evaluation for optically pre-amplified free-space optical communication systems in turbulent atmosphere
TL;DR: In this paper, moment generating function (MGF) techniques were used to evaluate the bit error rate performance of an optically pre-amplified FSO system in the presence of both atmospheric turbulence and amplified spontaneous emission (ASE) noise.
Journal ArticleDOI
Performance evaluation of space shift keying in free-space optical communication
TL;DR: In this article, the performance of a space shift keying (SSK) scheme in a free-space optical (FSO) communication system under indoor and outdoor conditions is analyzed. And the analytical bit error rate (BER) of an indoor N t χ 1 FSO-SSK system experiencing a deterministic channel is derived.
Proceedings ArticleDOI
Performance analysis of free-space on-off-keying optical communication systems impaired by turbulence
TL;DR: In this article, the performance of a free-space optical (FSO) communication system is investigated when communication is established via a short-range, turbulent optical channel, and the system under investigation utilizes on-off-keying (OOK) modulation combined with direct-detection to establish a duplex communication link.