Solar Scintillation Effect for Optical Waves Propagating Through Gamma–Gamma Coronal Turbulence Channels

Abstract

Optical communication is a promising strategy for deep space exploration but it is susceptible to coronal solar wind turbulence impairments during superior solar conjunction. The variance of amplitude fluctuations caused by coronal turbulence on optical waves propagation is proposed in this paper. Both the generalized non-Kolmogorov coronal turbulence spectrum and the aperture averaging effect are taken into account. The analytic expression of the bit error rate (BER) for free-space optical (FSO) link is then derived based on Gamma-Gamma distribution model under the weak-to-moderate coronal turbulence channels. Numerical evaluations results demonstrate that coronal turbulence with small non-Kolmogorov spectral index, large outer scale, and inner scale has more potential to deduce amplitude fluctuations. With the increment of antenna radius, the amplitude fluctuations decrease obviously. In addition, the variation tendencies of these parameters can further result in small BER. Therefore, the link performance will be improved by decreasing the optical wavelength and enlarging the antenna radius. Our proposed amplitude fluctuations model with aperture averaging effect has potential application for the future deep space FSO communication.

Subtraction dual‐wavelength for enhanced transmission performance of free‐space optical communication over turbulence effect

“…3 BER performance at varying power transmitted under strong turbulence condition Fig. 4 Effect of varying bit rates at a fixed power received of -10 dBm on BER performance under strong turbulence condition heavy turbulence without of loss data [2]. As shown in Figure 3, the BER performance of the DDM technique is 98% better as compared to PCB-OOK.…”

“…Introduction: Free-space optical (FSO) communication is strongly influenced by atmospheric attenuation and atmospheric scintillation [1]. Signal scattering and absorption due to the atmospheric attenuation would require either sufficiently high power for transmission within the safety limit or reduction in the propagation link [2]. Meanwhile, atmospheric scintillation attributed to temperature inhomogeneity results in constructive and destructive interference of the optical beam traversing the atmosphere [3,4].…”

Link-Layer Retransmission-based Error-Control Protocols in FSO Communications: A Survey

“…), which enables a wide range of services to support remote human operations [48]. With the rapid development of deep space exploration, a new era of study on FSO communications in deep space is of widespread concern, thanks to its high-speed connectivity and low power consumption compared to the RF counterpart [95]. Several missions on the optical communication test and space exploration have been conducted with an FSO deep space communication system (see references therein [96]).…”

BER and Channel Capacity Performance of an FSO Communication System over Atmospheric Turbulence with Different Types of Noise

“…Recently, several probability distribution functions (PDFs) have been proposed for various channel models to characterize the fading process of the optical signal in atmospheric turbulence. For turbulence under weak condition, the lognormal fading model is employed, as the signal obeys a lognormal distribution [ 8 , 9 ]. In view of the influence of atmospheric turbulence under the weak conditions on an optical signal, the performance metrics of the FSO system with maximum-likelihood detection are investigated under the weak turbulence with a lognormal model [ 10 ].…”